./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/14_spin2003.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/pthread-ext/14_spin2003.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 f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --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 19:55:07,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:55:07,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:55:07,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:55:07,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:55:07,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:55:07,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:55:07,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:55:07,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:55:07,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:55:07,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:55:07,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:55:07,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:55:07,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:55:07,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:55:07,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:55:07,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:55:07,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:55:07,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:55:07,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:55:07,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:55:07,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:55:07,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:55:07,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:55:07,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:55:07,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:55:07,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:55:07,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:55:07,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:55:07,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:55:07,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:55:07,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:55:07,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:55:07,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:55:07,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:55:07,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:55:07,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:55:07,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:55:07,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:55:07,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:55:07,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:55:07,139 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:55:07,170 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:55:07,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:55:07,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:55:07,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:55:07,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:55:07,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:55:07,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:55:07,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:55:07,173 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:55:07,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:55:07,174 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:55:07,174 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:55:07,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:55:07,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:55:07,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:55:07,175 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:55:07,175 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:55:07,175 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:55:07,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:55:07,176 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:55:07,176 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:55:07,176 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:55:07,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:55:07,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:55:07,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:55:07,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:55:07,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:55:07,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:55:07,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:55:07,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:55:07,178 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:55:07,178 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:55:07,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:55:07,178 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:55:07,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:55:07,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:55:07,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:55:07,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:55:07,484 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:55:07,484 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:55:07,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-08-29 19:55:08,631 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:55:08,863 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:55:08,864 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-08-29 19:55:08,872 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/018240c05/fd4561ab4c5641b1bcd9af856fbce957/FLAG52c8b00f7 [2023-08-29 19:55:08,889 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/018240c05/fd4561ab4c5641b1bcd9af856fbce957 [2023-08-29 19:55:08,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:55:08,892 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:55:08,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:55:08,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:55:08,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:55:08,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:55:08" (1/1) ... [2023-08-29 19:55:08,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bb0b639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:08, skipping insertion in model container [2023-08-29 19:55:08,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:55:08" (1/1) ... [2023-08-29 19:55:08,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:55:08,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:55:09,262 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i[30203,30216] [2023-08-29 19:55:09,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:55:09,280 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:55:09,319 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i[30203,30216] [2023-08-29 19:55:09,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:55:09,358 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:55:09,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:09 WrapperNode [2023-08-29 19:55:09,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:55:09,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:55:09,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:55:09,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:55:09,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:09" (1/1) ... [2023-08-29 19:55:09,392 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:09" (1/1) ... [2023-08-29 19:55:09,411 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 47 [2023-08-29 19:55:09,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:55:09,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:55:09,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:55:09,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:55:09,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:09" (1/1) ... [2023-08-29 19:55:09,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:09" (1/1) ... [2023-08-29 19:55:09,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:09" (1/1) ... [2023-08-29 19:55:09,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:09" (1/1) ... [2023-08-29 19:55:09,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:09" (1/1) ... [2023-08-29 19:55:09,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:09" (1/1) ... [2023-08-29 19:55:09,439 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:09" (1/1) ... [2023-08-29 19:55:09,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:09" (1/1) ... [2023-08-29 19:55:09,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:55:09,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:55:09,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:55:09,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:55:09,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:09" (1/1) ... [2023-08-29 19:55:09,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:55:09,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:55:09,477 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 19:55:09,502 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 19:55:09,517 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-29 19:55:09,517 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-29 19:55:09,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:55:09,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:55:09,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:55:09,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:55:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:55:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:55:09,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:55:09,519 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 19:55:09,679 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:55:09,680 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:55:09,786 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:55:09,818 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:55:09,819 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-29 19:55:09,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:55:09 BoogieIcfgContainer [2023-08-29 19:55:09,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:55:09,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:55:09,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:55:09,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:55:09,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:55:08" (1/3) ... [2023-08-29 19:55:09,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35ab5c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:55:09, skipping insertion in model container [2023-08-29 19:55:09,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:09" (2/3) ... [2023-08-29 19:55:09,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35ab5c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:55:09, skipping insertion in model container [2023-08-29 19:55:09,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:55:09" (3/3) ... [2023-08-29 19:55:09,828 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2023-08-29 19:55:09,842 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:55:09,842 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-29 19:55:09,842 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:55:09,873 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:55:09,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 93 flow [2023-08-29 19:55:09,924 INFO L130 PetriNetUnfolder]: 3/59 cut-off events. [2023-08-29 19:55:09,924 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:09,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 59 events. 3/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 107 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 29. Up to 4 conditions per place. [2023-08-29 19:55:09,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 44 transitions, 93 flow [2023-08-29 19:55:09,932 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 93 flow [2023-08-29 19:55:09,934 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:55:09,942 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 44 transitions, 93 flow [2023-08-29 19:55:09,944 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 44 transitions, 93 flow [2023-08-29 19:55:09,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 93 flow [2023-08-29 19:55:09,964 INFO L130 PetriNetUnfolder]: 3/59 cut-off events. [2023-08-29 19:55:09,965 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:09,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 59 events. 3/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 107 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 29. Up to 4 conditions per place. [2023-08-29 19:55:09,966 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-08-29 19:55:11,223 INFO L134 LiptonReduction]: Checked pairs total: 394 [2023-08-29 19:55:11,223 INFO L136 LiptonReduction]: Total number of compositions: 46 [2023-08-29 19:55:11,244 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:55:11,250 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;@24f808d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:55:11,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-29 19:55:11,251 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 19:55:11,252 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:11,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:11,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:11,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-08-29 19:55:11,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:11,257 INFO L85 PathProgramCache]: Analyzing trace with hash 7316, now seen corresponding path program 1 times [2023-08-29 19:55:11,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:11,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936851240] [2023-08-29 19:55:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:11,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:11,481 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 19:55:11,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:11,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936851240] [2023-08-29 19:55:11,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936851240] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:11,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:11,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:11,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707501039] [2023-08-29 19:55:11,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:11,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:11,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:11,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:11,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 90 [2023-08-29 19:55:11,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 27 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 19:55:11,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:11,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 90 [2023-08-29 19:55:11,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:11,578 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-08-29 19:55:11,578 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:11,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 15 events. 3/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 21 event pairs, 3 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 20. Up to 14 conditions per place. [2023-08-29 19:55:11,579 INFO L137 encePairwiseOnDemand]: 85/90 looper letters, 5 selfloop transitions, 1 changer transitions 1/7 dead transitions. [2023-08-29 19:55:11,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 7 transitions, 31 flow [2023-08-29 19:55:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:11,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:11,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2023-08-29 19:55:11,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2023-08-29 19:55:11,595 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 109 transitions. [2023-08-29 19:55:11,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 109 transitions. [2023-08-29 19:55:11,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:11,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 109 transitions. [2023-08-29 19:55:11,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 19:55:11,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 19:55:11,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 19:55:11,604 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 27 flow. Second operand 3 states and 109 transitions. [2023-08-29 19:55:11,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 7 transitions, 31 flow [2023-08-29 19:55:11,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:55:11,608 INFO L231 Difference]: Finished difference. Result has 12 places, 6 transitions, 17 flow [2023-08-29 19:55:11,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=17, PETRI_PLACES=12, PETRI_TRANSITIONS=6} [2023-08-29 19:55:11,612 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-08-29 19:55:11,612 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 6 transitions, 17 flow [2023-08-29 19:55:11,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 19:55:11,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:11,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:11,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:55:11,613 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 2 more)] === [2023-08-29 19:55:11,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:11,614 INFO L85 PathProgramCache]: Analyzing trace with hash 7314, now seen corresponding path program 1 times [2023-08-29 19:55:11,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:11,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284656261] [2023-08-29 19:55:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:11,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:11,652 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 19:55:11,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:11,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284656261] [2023-08-29 19:55:11,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284656261] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:11,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:11,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:11,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692619222] [2023-08-29 19:55:11,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:11,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:11,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:11,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:11,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:11,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 90 [2023-08-29 19:55:11,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 6 transitions, 17 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 19:55:11,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:11,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 90 [2023-08-29 19:55:11,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:11,682 INFO L130 PetriNetUnfolder]: 2/10 cut-off events. [2023-08-29 19:55:11,683 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:11,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 10 events. 2/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 event pairs, 2 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 20. Up to 10 conditions per place. [2023-08-29 19:55:11,683 INFO L137 encePairwiseOnDemand]: 88/90 looper letters, 0 selfloop transitions, 0 changer transitions 5/5 dead transitions. [2023-08-29 19:55:11,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 5 transitions, 25 flow [2023-08-29 19:55:11,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2023-08-29 19:55:11,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2023-08-29 19:55:11,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 99 transitions. [2023-08-29 19:55:11,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 99 transitions. [2023-08-29 19:55:11,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:11,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 99 transitions. [2023-08-29 19:55:11,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 19:55:11,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 19:55:11,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 19:55:11,688 INFO L175 Difference]: Start difference. First operand has 12 places, 6 transitions, 17 flow. Second operand 3 states and 99 transitions. [2023-08-29 19:55:11,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 5 transitions, 25 flow [2023-08-29 19:55:11,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 5 transitions, 24 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:11,689 INFO L231 Difference]: Finished difference. Result has 11 places, 0 transitions, 0 flow [2023-08-29 19:55:11,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=11, PETRI_TRANSITIONS=0} [2023-08-29 19:55:11,689 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -3 predicate places. [2023-08-29 19:55:11,690 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 0 transitions, 0 flow [2023-08-29 19:55:11,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 19:55:11,692 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 5 remaining) [2023-08-29 19:55:11,692 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 5 remaining) [2023-08-29 19:55:11,693 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 5 remaining) [2023-08-29 19:55:11,693 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 5 remaining) [2023-08-29 19:55:11,693 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-08-29 19:55:11,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:55:11,694 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-29 19:55:11,695 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 19:55:11,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 93 flow [2023-08-29 19:55:11,707 INFO L130 PetriNetUnfolder]: 3/59 cut-off events. [2023-08-29 19:55:11,708 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:11,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 59 events. 3/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 107 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 29. Up to 4 conditions per place. [2023-08-29 19:55:11,708 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 44 transitions, 93 flow [2023-08-29 19:55:11,709 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 93 flow [2023-08-29 19:55:11,709 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:55:11,709 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 44 transitions, 93 flow [2023-08-29 19:55:11,709 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 44 transitions, 93 flow [2023-08-29 19:55:11,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 93 flow [2023-08-29 19:55:11,718 INFO L130 PetriNetUnfolder]: 3/59 cut-off events. [2023-08-29 19:55:11,718 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:11,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 59 events. 3/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 107 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 29. Up to 4 conditions per place. [2023-08-29 19:55:11,719 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-08-29 19:55:12,735 INFO L134 LiptonReduction]: Checked pairs total: 423 [2023-08-29 19:55:12,735 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-08-29 19:55:12,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 19:55:12,738 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;@24f808d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:55:12,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 19:55:12,740 INFO L130 PetriNetUnfolder]: 0/15 cut-off events. [2023-08-29 19:55:12,740 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:12,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:12,741 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 19:55:12,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 19:55:12,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:12,741 INFO L85 PathProgramCache]: Analyzing trace with hash -441557346, now seen corresponding path program 1 times [2023-08-29 19:55:12,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:12,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093169705] [2023-08-29 19:55:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:12,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:55:12,769 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:55:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:55:12,801 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:55:12,801 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:55:12,802 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 19:55:12,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:55:12,802 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 19:55:12,803 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 19:55:12,804 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 19:55:12,804 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 19:55:12,818 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:55:12,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 126 flow [2023-08-29 19:55:12,841 INFO L130 PetriNetUnfolder]: 5/89 cut-off events. [2023-08-29 19:55:12,842 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:55:12,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 5/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 194 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 60. Up to 6 conditions per place. [2023-08-29 19:55:12,843 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 57 transitions, 126 flow [2023-08-29 19:55:12,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 57 transitions, 126 flow [2023-08-29 19:55:12,844 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:55:12,845 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 126 flow [2023-08-29 19:55:12,845 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 126 flow [2023-08-29 19:55:12,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 126 flow [2023-08-29 19:55:12,864 INFO L130 PetriNetUnfolder]: 5/89 cut-off events. [2023-08-29 19:55:12,864 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:55:12,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 5/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 194 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 60. Up to 6 conditions per place. [2023-08-29 19:55:12,868 INFO L119 LiptonReduction]: Number of co-enabled transitions 1176 [2023-08-29 19:55:13,774 INFO L134 LiptonReduction]: Checked pairs total: 3205 [2023-08-29 19:55:13,774 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-08-29 19:55:13,776 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:55:13,777 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;@24f808d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:55:13,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 19:55:13,778 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 19:55:13,778 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:13,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:13,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:13,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 19:55:13,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:13,779 INFO L85 PathProgramCache]: Analyzing trace with hash 12474, now seen corresponding path program 1 times [2023-08-29 19:55:13,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:13,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885713274] [2023-08-29 19:55:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:13,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:13,793 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 19:55:13,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:13,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885713274] [2023-08-29 19:55:13,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885713274] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:13,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:13,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:13,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849638233] [2023-08-29 19:55:13,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:13,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:55:13,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:13,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:55:13,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:55:13,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 101 [2023-08-29 19:55:13,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 46.0) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 19:55:13,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:13,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 101 [2023-08-29 19:55:13,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:13,858 INFO L130 PetriNetUnfolder]: 121/295 cut-off events. [2023-08-29 19:55:13,858 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-29 19:55:13,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 295 events. 121/295 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1687 event pairs, 121 based on Foata normal form. 16/224 useless extension candidates. Maximal degree in co-relation 142. Up to 226 conditions per place. [2023-08-29 19:55:13,860 INFO L137 encePairwiseOnDemand]: 98/101 looper letters, 13 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-29 19:55:13,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 80 flow [2023-08-29 19:55:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:55:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:55:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 106 transitions. [2023-08-29 19:55:13,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247524752475248 [2023-08-29 19:55:13,862 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 106 transitions. [2023-08-29 19:55:13,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 106 transitions. [2023-08-29 19:55:13,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:13,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 106 transitions. [2023-08-29 19:55:13,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 53.0) internal successors, (106), 2 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 19:55:13,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 19:55:13,864 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 19:55:13,865 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 62 flow. Second operand 2 states and 106 transitions. [2023-08-29 19:55:13,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 80 flow [2023-08-29 19:55:13,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 21 transitions, 78 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-29 19:55:13,866 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 52 flow [2023-08-29 19:55:13,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-08-29 19:55:13,867 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-08-29 19:55:13,867 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 52 flow [2023-08-29 19:55:13,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 46.0) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 19:55:13,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:13,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:13,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:55:13,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 19:55:13,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:13,868 INFO L85 PathProgramCache]: Analyzing trace with hash 12473, now seen corresponding path program 1 times [2023-08-29 19:55:13,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:13,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360531984] [2023-08-29 19:55:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:13,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:13,893 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 19:55:13,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:13,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360531984] [2023-08-29 19:55:13,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360531984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:13,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:13,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:13,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003974918] [2023-08-29 19:55:13,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:13,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:13,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:13,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:13,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:13,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 101 [2023-08-29 19:55:13,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 19:55:13,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:13,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 101 [2023-08-29 19:55:13,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:13,942 INFO L130 PetriNetUnfolder]: 86/220 cut-off events. [2023-08-29 19:55:13,943 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 19:55:13,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 220 events. 86/220 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1179 event pairs, 86 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 405. Up to 164 conditions per place. [2023-08-29 19:55:13,944 INFO L137 encePairwiseOnDemand]: 99/101 looper letters, 11 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-29 19:55:13,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 74 flow [2023-08-29 19:55:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:13,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2023-08-29 19:55:13,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.429042904290429 [2023-08-29 19:55:13,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 130 transitions. [2023-08-29 19:55:13,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 130 transitions. [2023-08-29 19:55:13,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:13,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 130 transitions. [2023-08-29 19:55:13,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 19:55:13,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 19:55:13,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 19:55:13,949 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 52 flow. Second operand 3 states and 130 transitions. [2023-08-29 19:55:13,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 74 flow [2023-08-29 19:55:13,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 20 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:55:13,954 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 52 flow [2023-08-29 19:55:13,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-08-29 19:55:13,955 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-08-29 19:55:13,955 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 52 flow [2023-08-29 19:55:13,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 19:55:13,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:13,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:13,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:55:13,956 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 19:55:13,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:13,956 INFO L85 PathProgramCache]: Analyzing trace with hash 12472, now seen corresponding path program 1 times [2023-08-29 19:55:13,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:13,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683418708] [2023-08-29 19:55:13,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:13,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:14,004 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 19:55:14,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:14,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683418708] [2023-08-29 19:55:14,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683418708] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:14,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:14,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:14,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472444465] [2023-08-29 19:55:14,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:14,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:14,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:14,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:14,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:14,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 101 [2023-08-29 19:55:14,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 19:55:14,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:14,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 101 [2023-08-29 19:55:14,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:14,055 INFO L130 PetriNetUnfolder]: 51/145 cut-off events. [2023-08-29 19:55:14,055 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 19:55:14,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 145 events. 51/145 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 679 event pairs, 51 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 270. Up to 103 conditions per place. [2023-08-29 19:55:14,056 INFO L137 encePairwiseOnDemand]: 99/101 looper letters, 10 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-29 19:55:14,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 19 transitions, 72 flow [2023-08-29 19:55:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:14,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-08-29 19:55:14,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44554455445544555 [2023-08-29 19:55:14,058 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-08-29 19:55:14,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-08-29 19:55:14,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:14,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-08-29 19:55:14,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 19:55:14,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 19:55:14,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 19:55:14,061 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 52 flow. Second operand 3 states and 135 transitions. [2023-08-29 19:55:14,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 19 transitions, 72 flow [2023-08-29 19:55:14,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 19 transitions, 71 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:14,062 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 51 flow [2023-08-29 19:55:14,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-08-29 19:55:14,063 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-08-29 19:55:14,063 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 51 flow [2023-08-29 19:55:14,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 19:55:14,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:14,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:14,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:55:14,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 19:55:14,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:14,064 INFO L85 PathProgramCache]: Analyzing trace with hash 852719884, now seen corresponding path program 1 times [2023-08-29 19:55:14,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:14,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999792210] [2023-08-29 19:55:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:14,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:14,091 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 19:55:14,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:14,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999792210] [2023-08-29 19:55:14,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999792210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:14,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:14,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:55:14,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201163854] [2023-08-29 19:55:14,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:14,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:14,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:14,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:14,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:14,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 101 [2023-08-29 19:55:14,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 19:55:14,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:14,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 101 [2023-08-29 19:55:14,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:14,144 INFO L130 PetriNetUnfolder]: 97/220 cut-off events. [2023-08-29 19:55:14,144 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 19:55:14,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 220 events. 97/220 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1009 event pairs, 61 based on Foata normal form. 14/227 useless extension candidates. Maximal degree in co-relation 440. Up to 143 conditions per place. [2023-08-29 19:55:14,145 INFO L137 encePairwiseOnDemand]: 94/101 looper letters, 14 selfloop transitions, 5 changer transitions 7/30 dead transitions. [2023-08-29 19:55:14,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 130 flow [2023-08-29 19:55:14,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:14,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2023-08-29 19:55:14,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46864686468646866 [2023-08-29 19:55:14,148 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2023-08-29 19:55:14,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2023-08-29 19:55:14,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:14,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2023-08-29 19:55:14,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 19:55:14,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 19:55:14,152 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 19:55:14,152 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 51 flow. Second operand 3 states and 142 transitions. [2023-08-29 19:55:14,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 130 flow [2023-08-29 19:55:14,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:14,154 INFO L231 Difference]: Finished difference. Result has 30 places, 19 transitions, 69 flow [2023-08-29 19:55:14,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=30, PETRI_TRANSITIONS=19} [2023-08-29 19:55:14,156 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-08-29 19:55:14,157 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 19 transitions, 69 flow [2023-08-29 19:55:14,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 19:55:14,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:14,158 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:14,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 19:55:14,159 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 19:55:14,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:14,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1475912532, now seen corresponding path program 1 times [2023-08-29 19:55:14,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:14,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301094305] [2023-08-29 19:55:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:14,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:55:14,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:14,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301094305] [2023-08-29 19:55:14,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301094305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:14,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:14,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:55:14,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149519117] [2023-08-29 19:55:14,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:14,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:14,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:14,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:14,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:14,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 101 [2023-08-29 19:55:14,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 19 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:55:14,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:14,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 101 [2023-08-29 19:55:14,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:14,286 INFO L130 PetriNetUnfolder]: 17/79 cut-off events. [2023-08-29 19:55:14,286 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 19:55:14,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 79 events. 17/79 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 247 event pairs, 7 based on Foata normal form. 6/84 useless extension candidates. Maximal degree in co-relation 175. Up to 26 conditions per place. [2023-08-29 19:55:14,287 INFO L137 encePairwiseOnDemand]: 97/101 looper letters, 0 selfloop transitions, 0 changer transitions 19/19 dead transitions. [2023-08-29 19:55:14,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 19 transitions, 92 flow [2023-08-29 19:55:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:14,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2023-08-29 19:55:14,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47854785478547857 [2023-08-29 19:55:14,295 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 145 transitions. [2023-08-29 19:55:14,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 145 transitions. [2023-08-29 19:55:14,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:14,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 145 transitions. [2023-08-29 19:55:14,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 19:55:14,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 19:55:14,298 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 19:55:14,298 INFO L175 Difference]: Start difference. First operand has 30 places, 19 transitions, 69 flow. Second operand 3 states and 145 transitions. [2023-08-29 19:55:14,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 19 transitions, 92 flow [2023-08-29 19:55:14,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 19 transitions, 77 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:55:14,300 INFO L231 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2023-08-29 19:55:14,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2023-08-29 19:55:14,301 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-08-29 19:55:14,301 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2023-08-29 19:55:14,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 19:55:14,302 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 6 remaining) [2023-08-29 19:55:14,302 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-08-29 19:55:14,302 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 19:55:14,302 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 6 remaining) [2023-08-29 19:55:14,302 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-08-29 19:55:14,302 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 19:55:14,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 19:55:14,303 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 19:55:14,304 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 19:55:14,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 126 flow [2023-08-29 19:55:14,313 INFO L130 PetriNetUnfolder]: 5/89 cut-off events. [2023-08-29 19:55:14,313 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:55:14,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 5/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 194 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 60. Up to 6 conditions per place. [2023-08-29 19:55:14,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 57 transitions, 126 flow [2023-08-29 19:55:14,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 57 transitions, 126 flow [2023-08-29 19:55:14,316 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:55:14,317 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 126 flow [2023-08-29 19:55:14,317 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 126 flow [2023-08-29 19:55:14,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 126 flow [2023-08-29 19:55:14,324 INFO L130 PetriNetUnfolder]: 5/89 cut-off events. [2023-08-29 19:55:14,324 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:55:14,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 5/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 194 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 60. Up to 6 conditions per place. [2023-08-29 19:55:14,325 INFO L119 LiptonReduction]: Number of co-enabled transitions 1176 [2023-08-29 19:55:15,186 INFO L134 LiptonReduction]: Checked pairs total: 3161 [2023-08-29 19:55:15,186 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-08-29 19:55:15,188 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 19:55:15,188 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;@24f808d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:55:15,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 19:55:15,191 INFO L130 PetriNetUnfolder]: 0/32 cut-off events. [2023-08-29 19:55:15,191 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:55:15,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:15,191 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 19:55:15,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 19:55:15,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:15,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1152556385, now seen corresponding path program 1 times [2023-08-29 19:55:15,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:15,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526945341] [2023-08-29 19:55:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:15,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:55:15,202 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:55:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:55:15,217 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:55:15,217 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:55:15,217 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 19:55:15,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:55:15,218 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 19:55:15,218 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 19:55:15,218 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 19:55:15,219 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 19:55:15,230 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:55:15,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-29 19:55:15,240 INFO L130 PetriNetUnfolder]: 7/119 cut-off events. [2023-08-29 19:55:15,240 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 19:55:15,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 119 events. 7/119 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 292 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 93. Up to 8 conditions per place. [2023-08-29 19:55:15,240 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 70 transitions, 161 flow [2023-08-29 19:55:15,241 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 70 transitions, 161 flow [2023-08-29 19:55:15,241 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:55:15,242 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-29 19:55:15,242 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-29 19:55:15,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-29 19:55:15,249 INFO L130 PetriNetUnfolder]: 7/119 cut-off events. [2023-08-29 19:55:15,250 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 19:55:15,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 119 events. 7/119 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 292 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 93. Up to 8 conditions per place. [2023-08-29 19:55:15,252 INFO L119 LiptonReduction]: Number of co-enabled transitions 2232 [2023-08-29 19:55:16,240 INFO L134 LiptonReduction]: Checked pairs total: 8905 [2023-08-29 19:55:16,240 INFO L136 LiptonReduction]: Total number of compositions: 53 [2023-08-29 19:55:16,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:55:16,242 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;@24f808d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:55:16,242 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-29 19:55:16,243 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 19:55:16,243 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:16,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:16,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:16,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:55:16,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:16,244 INFO L85 PathProgramCache]: Analyzing trace with hash 18233, now seen corresponding path program 1 times [2023-08-29 19:55:16,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:16,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51824210] [2023-08-29 19:55:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:16,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:16,267 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 19:55:16,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:16,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51824210] [2023-08-29 19:55:16,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51824210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:16,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:16,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:16,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979790060] [2023-08-29 19:55:16,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:16,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:16,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:16,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:16,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 123 [2023-08-29 19:55:16,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 19:55:16,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:16,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 123 [2023-08-29 19:55:16,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:16,365 INFO L130 PetriNetUnfolder]: 450/952 cut-off events. [2023-08-29 19:55:16,365 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2023-08-29 19:55:16,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1788 conditions, 952 events. 450/952 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6664 event pairs, 450 based on Foata normal form. 171/1002 useless extension candidates. Maximal degree in co-relation 348. Up to 705 conditions per place. [2023-08-29 19:55:16,370 INFO L137 encePairwiseOnDemand]: 116/123 looper letters, 14 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-29 19:55:16,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 27 transitions, 105 flow [2023-08-29 19:55:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-08-29 19:55:16,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2023-08-29 19:55:16,372 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-08-29 19:55:16,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-08-29 19:55:16,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:16,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-08-29 19:55:16,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states 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 19:55:16,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 19:55:16,374 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 19:55:16,374 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 93 flow. Second operand 3 states and 162 transitions. [2023-08-29 19:55:16,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 27 transitions, 105 flow [2023-08-29 19:55:16,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 99 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-29 19:55:16,376 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 71 flow [2023-08-29 19:55:16,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-08-29 19:55:16,377 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2023-08-29 19:55:16,377 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 71 flow [2023-08-29 19:55:16,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 19:55:16,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:16,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:16,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 19:55:16,378 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:55:16,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:16,378 INFO L85 PathProgramCache]: Analyzing trace with hash 18234, now seen corresponding path program 1 times [2023-08-29 19:55:16,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:16,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373154811] [2023-08-29 19:55:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:16,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:16,404 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 19:55:16,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:16,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373154811] [2023-08-29 19:55:16,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373154811] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:16,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:16,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:16,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527774605] [2023-08-29 19:55:16,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:16,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:16,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:16,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:16,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:16,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 123 [2023-08-29 19:55:16,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 19:55:16,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:16,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 123 [2023-08-29 19:55:16,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:16,488 INFO L130 PetriNetUnfolder]: 279/633 cut-off events. [2023-08-29 19:55:16,488 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 19:55:16,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1167 conditions, 633 events. 279/633 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4101 event pairs, 279 based on Foata normal form. 0/597 useless extension candidates. Maximal degree in co-relation 1158. Up to 449 conditions per place. [2023-08-29 19:55:16,492 INFO L137 encePairwiseOnDemand]: 121/123 looper letters, 13 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-29 19:55:16,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 97 flow [2023-08-29 19:55:16,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:16,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-08-29 19:55:16,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2023-08-29 19:55:16,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-08-29 19:55:16,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-08-29 19:55:16,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:16,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-08-29 19:55:16,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states 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 19:55:16,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 19:55:16,495 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 19:55:16,495 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 71 flow. Second operand 3 states and 162 transitions. [2023-08-29 19:55:16,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 97 flow [2023-08-29 19:55:16,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:16,497 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 70 flow [2023-08-29 19:55:16,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-08-29 19:55:16,498 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2023-08-29 19:55:16,498 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 70 flow [2023-08-29 19:55:16,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 19:55:16,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:16,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:16,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 19:55:16,499 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:55:16,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:16,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1469673165, now seen corresponding path program 1 times [2023-08-29 19:55:16,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:16,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541911905] [2023-08-29 19:55:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:16,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:16,523 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 19:55:16,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:16,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541911905] [2023-08-29 19:55:16,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541911905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:16,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:16,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:55:16,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840100066] [2023-08-29 19:55:16,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:16,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:16,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:16,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:16,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:16,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 123 [2023-08-29 19:55:16,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:55:16,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:16,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 123 [2023-08-29 19:55:16,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:16,672 INFO L130 PetriNetUnfolder]: 966/1762 cut-off events. [2023-08-29 19:55:16,673 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 19:55:16,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3466 conditions, 1762 events. 966/1762 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11524 event pairs, 535 based on Foata normal form. 242/1965 useless extension candidates. Maximal degree in co-relation 3456. Up to 993 conditions per place. [2023-08-29 19:55:16,680 INFO L137 encePairwiseOnDemand]: 113/123 looper letters, 28 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2023-08-29 19:55:16,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 180 flow [2023-08-29 19:55:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2023-08-29 19:55:16,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2023-08-29 19:55:16,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2023-08-29 19:55:16,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2023-08-29 19:55:16,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:16,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2023-08-29 19:55:16,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 19:55:16,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 19:55:16,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 19:55:16,684 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 70 flow. Second operand 3 states and 167 transitions. [2023-08-29 19:55:16,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 180 flow [2023-08-29 19:55:16,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 179 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:16,685 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 127 flow [2023-08-29 19:55:16,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-08-29 19:55:16,686 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2023-08-29 19:55:16,686 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 127 flow [2023-08-29 19:55:16,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 19:55:16,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:16,687 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:16,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 19:55:16,687 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 19:55:16,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:16,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1564631363, now seen corresponding path program 1 times [2023-08-29 19:55:16,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:16,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804798337] [2023-08-29 19:55:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:16,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:16,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:16,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804798337] [2023-08-29 19:55:16,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804798337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:55:16,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532111612] [2023-08-29 19:55:16,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:16,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:55:16,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:55:16,797 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 19:55:16,816 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 19:55:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:16,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 19:55:16,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:55:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:55:16,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:55:16,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532111612] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:16,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 19:55:16,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-29 19:55:16,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970314364] [2023-08-29 19:55:16,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:16,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:16,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:16,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:16,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:55:16,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 123 [2023-08-29 19:55:16,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 19:55:16,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:16,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 123 [2023-08-29 19:55:16,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:16,969 INFO L130 PetriNetUnfolder]: 49/233 cut-off events. [2023-08-29 19:55:16,970 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2023-08-29 19:55:16,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 233 events. 49/233 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1155 event pairs, 27 based on Foata normal form. 28/256 useless extension candidates. Maximal degree in co-relation 519. Up to 58 conditions per place. [2023-08-29 19:55:16,970 INFO L137 encePairwiseOnDemand]: 117/123 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-08-29 19:55:16,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 26 transitions, 135 flow [2023-08-29 19:55:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2023-08-29 19:55:16,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2023-08-29 19:55:16,972 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2023-08-29 19:55:16,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2023-08-29 19:55:16,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:16,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2023-08-29 19:55:16,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 19:55:16,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 19:55:16,974 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 19:55:16,974 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 127 flow. Second operand 3 states and 173 transitions. [2023-08-29 19:55:16,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 26 transitions, 135 flow [2023-08-29 19:55:16,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:55:16,975 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2023-08-29 19:55:16,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2023-08-29 19:55:16,976 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2023-08-29 19:55:16,976 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2023-08-29 19:55:16,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 19:55:16,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-08-29 19:55:16,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-08-29 19:55:16,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 7 remaining) [2023-08-29 19:55:16,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2023-08-29 19:55:16,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-08-29 19:55:16,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-29 19:55:16,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 7 remaining) [2023-08-29 19:55:16,986 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 19:55:17,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-29 19:55:17,186 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-29 19:55:17,186 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 19:55:17,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-29 19:55:17,197 INFO L130 PetriNetUnfolder]: 7/119 cut-off events. [2023-08-29 19:55:17,197 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 19:55:17,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 119 events. 7/119 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 292 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 93. Up to 8 conditions per place. [2023-08-29 19:55:17,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 70 transitions, 161 flow [2023-08-29 19:55:17,198 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 70 transitions, 161 flow [2023-08-29 19:55:17,198 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:55:17,199 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-29 19:55:17,199 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-29 19:55:17,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-29 19:55:17,205 INFO L130 PetriNetUnfolder]: 7/119 cut-off events. [2023-08-29 19:55:17,206 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 19:55:17,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 119 events. 7/119 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 292 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 93. Up to 8 conditions per place. [2023-08-29 19:55:17,208 INFO L119 LiptonReduction]: Number of co-enabled transitions 2232 [2023-08-29 19:55:18,291 INFO L134 LiptonReduction]: Checked pairs total: 8905 [2023-08-29 19:55:18,292 INFO L136 LiptonReduction]: Total number of compositions: 53 [2023-08-29 19:55:18,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 19:55:18,293 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;@24f808d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:55:18,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 19:55:18,297 INFO L130 PetriNetUnfolder]: 2/50 cut-off events. [2023-08-29 19:55:18,297 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 19:55:18,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:18,298 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 19:55:18,298 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 19:55:18,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:18,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1767330679, now seen corresponding path program 1 times [2023-08-29 19:55:18,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:18,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437133954] [2023-08-29 19:55:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:18,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:55:18,310 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:55:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:55:18,317 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:55:18,317 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:55:18,317 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 19:55:18,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:55:18,318 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 19:55:18,318 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 19:55:18,318 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 19:55:18,318 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 19:55:18,332 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:55:18,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 83 transitions, 198 flow [2023-08-29 19:55:18,342 INFO L130 PetriNetUnfolder]: 9/149 cut-off events. [2023-08-29 19:55:18,342 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 19:55:18,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 149 events. 9/149 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 359 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 127. Up to 10 conditions per place. [2023-08-29 19:55:18,343 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 83 transitions, 198 flow [2023-08-29 19:55:18,344 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 83 transitions, 198 flow [2023-08-29 19:55:18,344 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:55:18,344 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 83 transitions, 198 flow [2023-08-29 19:55:18,344 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 83 transitions, 198 flow [2023-08-29 19:55:18,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 83 transitions, 198 flow [2023-08-29 19:55:18,353 INFO L130 PetriNetUnfolder]: 9/149 cut-off events. [2023-08-29 19:55:18,353 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 19:55:18,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 149 events. 9/149 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 359 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 127. Up to 10 conditions per place. [2023-08-29 19:55:18,356 INFO L119 LiptonReduction]: Number of co-enabled transitions 3600 [2023-08-29 19:55:19,433 INFO L134 LiptonReduction]: Checked pairs total: 13219 [2023-08-29 19:55:19,433 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-29 19:55:19,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:55:19,434 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;@24f808d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:55:19,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-29 19:55:19,435 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 19:55:19,435 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:19,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:19,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:19,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:55:19,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash 24915, now seen corresponding path program 1 times [2023-08-29 19:55:19,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:19,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215620348] [2023-08-29 19:55:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:19,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:19,464 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 19:55:19,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:19,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215620348] [2023-08-29 19:55:19,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215620348] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:19,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:19,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:19,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684512357] [2023-08-29 19:55:19,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:19,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:19,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:19,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:19,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:19,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 143 [2023-08-29 19:55:19,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 19:55:19,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:19,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 143 [2023-08-29 19:55:19,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:19,875 INFO L130 PetriNetUnfolder]: 2562/4587 cut-off events. [2023-08-29 19:55:19,875 INFO L131 PetriNetUnfolder]: For 1054/1054 co-relation queries the response was YES. [2023-08-29 19:55:19,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 4587 events. 2562/4587 cut-off events. For 1054/1054 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 36059 event pairs, 2562 based on Foata normal form. 937/5032 useless extension candidates. Maximal degree in co-relation 1820. Up to 3585 conditions per place. [2023-08-29 19:55:19,905 INFO L137 encePairwiseOnDemand]: 135/143 looper letters, 18 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-29 19:55:19,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 35 transitions, 140 flow [2023-08-29 19:55:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2023-08-29 19:55:19,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4592074592074592 [2023-08-29 19:55:19,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2023-08-29 19:55:19,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2023-08-29 19:55:19,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:19,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2023-08-29 19:55:19,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 19:55:19,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states 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 19:55:19,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states 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 19:55:19,910 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 122 flow. Second operand 3 states and 197 transitions. [2023-08-29 19:55:19,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 35 transitions, 140 flow [2023-08-29 19:55:19,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 35 transitions, 128 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-29 19:55:19,913 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 92 flow [2023-08-29 19:55:19,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2023-08-29 19:55:19,914 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2023-08-29 19:55:19,914 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 92 flow [2023-08-29 19:55:19,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 19:55:19,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:19,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:19,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 19:55:19,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:55:19,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash 24917, now seen corresponding path program 1 times [2023-08-29 19:55:19,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:19,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086693851] [2023-08-29 19:55:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:19,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:19,935 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 19:55:19,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:19,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086693851] [2023-08-29 19:55:19,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086693851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:19,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:19,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:19,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279363528] [2023-08-29 19:55:19,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:19,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:19,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:19,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:19,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:19,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 143 [2023-08-29 19:55:19,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 19:55:19,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:19,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 143 [2023-08-29 19:55:19,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:20,186 INFO L130 PetriNetUnfolder]: 1623/3051 cut-off events. [2023-08-29 19:55:20,186 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-29 19:55:20,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5682 conditions, 3051 events. 1623/3051 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23181 event pairs, 1623 based on Foata normal form. 0/2901 useless extension candidates. Maximal degree in co-relation 5672. Up to 2305 conditions per place. [2023-08-29 19:55:20,201 INFO L137 encePairwiseOnDemand]: 141/143 looper letters, 17 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-29 19:55:20,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 34 transitions, 126 flow [2023-08-29 19:55:20,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-08-29 19:55:20,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289044289044289 [2023-08-29 19:55:20,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-08-29 19:55:20,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-08-29 19:55:20,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:20,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-08-29 19:55:20,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 19:55:20,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states 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 19:55:20,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states 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 19:55:20,207 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 92 flow. Second operand 3 states and 184 transitions. [2023-08-29 19:55:20,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 34 transitions, 126 flow [2023-08-29 19:55:20,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 34 transitions, 125 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:20,208 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 91 flow [2023-08-29 19:55:20,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2023-08-29 19:55:20,210 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2023-08-29 19:55:20,210 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 91 flow [2023-08-29 19:55:20,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 19:55:20,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:20,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:20,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 19:55:20,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:55:20,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:20,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1014998552, now seen corresponding path program 1 times [2023-08-29 19:55:20,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:20,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74021257] [2023-08-29 19:55:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:20,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:20,244 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 19:55:20,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:20,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74021257] [2023-08-29 19:55:20,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74021257] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:20,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:20,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:55:20,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65997283] [2023-08-29 19:55:20,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:20,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:20,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:20,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:20,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:20,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 143 [2023-08-29 19:55:20,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 19:55:20,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:20,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 143 [2023-08-29 19:55:20,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:21,571 INFO L130 PetriNetUnfolder]: 10745/16935 cut-off events. [2023-08-29 19:55:21,571 INFO L131 PetriNetUnfolder]: For 913/913 co-relation queries the response was YES. [2023-08-29 19:55:21,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33438 conditions, 16935 events. 10745/16935 cut-off events. For 913/913 co-relation queries the response was YES. Maximal size of possible extension queue 1130. Compared 131131 event pairs, 5857 based on Foata normal form. 2212/18634 useless extension candidates. Maximal degree in co-relation 33427. Up to 9097 conditions per place. [2023-08-29 19:55:21,669 INFO L137 encePairwiseOnDemand]: 129/143 looper letters, 38 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2023-08-29 19:55:21,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 240 flow [2023-08-29 19:55:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-08-29 19:55:21,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568764568764569 [2023-08-29 19:55:21,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-08-29 19:55:21,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-08-29 19:55:21,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:21,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-08-29 19:55:21,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states 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 19:55:21,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states 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 19:55:21,674 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states 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 19:55:21,675 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 91 flow. Second operand 3 states and 196 transitions. [2023-08-29 19:55:21,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 240 flow [2023-08-29 19:55:21,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 54 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:21,678 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 168 flow [2023-08-29 19:55:21,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-08-29 19:55:21,679 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-08-29 19:55:21,679 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 168 flow [2023-08-29 19:55:21,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 19:55:21,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:21,680 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:21,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 19:55:21,680 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 19:55:21,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:21,681 INFO L85 PathProgramCache]: Analyzing trace with hash 761334679, now seen corresponding path program 1 times [2023-08-29 19:55:21,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:21,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122058537] [2023-08-29 19:55:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:21,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:55:21,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:21,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122058537] [2023-08-29 19:55:21,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122058537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:21,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:21,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:55:21,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064161508] [2023-08-29 19:55:21,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:21,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:21,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:21,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:21,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:21,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 143 [2023-08-29 19:55:21,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 19:55:21,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:21,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 143 [2023-08-29 19:55:21,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:21,836 INFO L130 PetriNetUnfolder]: 149/641 cut-off events. [2023-08-29 19:55:21,836 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2023-08-29 19:55:21,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 641 events. 149/641 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4248 event pairs, 83 based on Foata normal form. 124/748 useless extension candidates. Maximal degree in co-relation 1443. Up to 164 conditions per place. [2023-08-29 19:55:21,837 INFO L137 encePairwiseOnDemand]: 135/143 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2023-08-29 19:55:21,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 33 transitions, 175 flow [2023-08-29 19:55:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:21,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-08-29 19:55:21,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47086247086247085 [2023-08-29 19:55:21,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-08-29 19:55:21,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-08-29 19:55:21,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:21,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-08-29 19:55:21,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 19:55:21,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states 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 19:55:21,849 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states 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 19:55:21,849 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 168 flow. Second operand 3 states and 202 transitions. [2023-08-29 19:55:21,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 33 transitions, 175 flow [2023-08-29 19:55:21,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 139 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:55:21,851 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2023-08-29 19:55:21,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2023-08-29 19:55:21,852 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2023-08-29 19:55:21,852 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2023-08-29 19:55:21,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 19:55:21,853 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 8 remaining) [2023-08-29 19:55:21,853 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-08-29 19:55:21,853 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 8 remaining) [2023-08-29 19:55:21,853 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 8 remaining) [2023-08-29 19:55:21,853 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-08-29 19:55:21,853 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-29 19:55:21,854 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-08-29 19:55:21,854 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 8 remaining) [2023-08-29 19:55:21,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 19:55:21,854 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-29 19:55:21,855 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 19:55:21,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 83 transitions, 198 flow [2023-08-29 19:55:21,864 INFO L130 PetriNetUnfolder]: 9/149 cut-off events. [2023-08-29 19:55:21,864 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 19:55:21,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 149 events. 9/149 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 359 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 127. Up to 10 conditions per place. [2023-08-29 19:55:21,865 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 83 transitions, 198 flow [2023-08-29 19:55:21,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 83 transitions, 198 flow [2023-08-29 19:55:21,866 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:55:21,866 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 83 transitions, 198 flow [2023-08-29 19:55:21,866 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 83 transitions, 198 flow [2023-08-29 19:55:21,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 83 transitions, 198 flow [2023-08-29 19:55:21,874 INFO L130 PetriNetUnfolder]: 9/149 cut-off events. [2023-08-29 19:55:21,875 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 19:55:21,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 149 events. 9/149 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 359 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 127. Up to 10 conditions per place. [2023-08-29 19:55:21,877 INFO L119 LiptonReduction]: Number of co-enabled transitions 3600 [2023-08-29 19:55:22,928 INFO L134 LiptonReduction]: Checked pairs total: 12927 [2023-08-29 19:55:22,928 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-29 19:55:22,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 19:55:22,930 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;@24f808d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:55:22,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 19:55:22,934 INFO L130 PetriNetUnfolder]: 3/66 cut-off events. [2023-08-29 19:55:22,934 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 19:55:22,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:22,934 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:22,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 19:55:22,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:22,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1335646876, now seen corresponding path program 1 times [2023-08-29 19:55:22,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:22,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468219127] [2023-08-29 19:55:22,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:22,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:55:22,945 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:55:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:55:22,954 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:55:22,954 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:55:22,955 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 19:55:22,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 19:55:22,955 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 19:55:22,955 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 19:55:22,956 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 19:55:22,956 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-29 19:55:22,969 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:55:22,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 96 transitions, 237 flow [2023-08-29 19:55:22,980 INFO L130 PetriNetUnfolder]: 11/179 cut-off events. [2023-08-29 19:55:22,981 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 19:55:22,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 179 events. 11/179 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 449 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 162. Up to 12 conditions per place. [2023-08-29 19:55:22,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 96 transitions, 237 flow [2023-08-29 19:55:22,983 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 96 transitions, 237 flow [2023-08-29 19:55:22,983 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:55:22,983 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 96 transitions, 237 flow [2023-08-29 19:55:22,983 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 96 transitions, 237 flow [2023-08-29 19:55:22,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 96 transitions, 237 flow [2023-08-29 19:55:22,993 INFO L130 PetriNetUnfolder]: 11/179 cut-off events. [2023-08-29 19:55:22,994 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 19:55:22,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 179 events. 11/179 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 449 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 162. Up to 12 conditions per place. [2023-08-29 19:55:22,998 INFO L119 LiptonReduction]: Number of co-enabled transitions 5280 [2023-08-29 19:55:24,157 INFO L134 LiptonReduction]: Checked pairs total: 19830 [2023-08-29 19:55:24,158 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-08-29 19:55:24,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:55:24,159 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;@24f808d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:55:24,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-29 19:55:24,160 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 19:55:24,160 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:24,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:24,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:24,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 19:55:24,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:24,161 INFO L85 PathProgramCache]: Analyzing trace with hash 32541, now seen corresponding path program 1 times [2023-08-29 19:55:24,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:24,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814392105] [2023-08-29 19:55:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:24,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:24,168 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 19:55:24,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:24,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814392105] [2023-08-29 19:55:24,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814392105] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:24,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:24,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:24,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375185873] [2023-08-29 19:55:24,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:24,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:55:24,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:24,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:55:24,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:55:24,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 165 [2023-08-29 19:55:24,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 153 flow. Second operand has 2 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 19:55:24,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:24,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 165 [2023-08-29 19:55:24,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:26,178 INFO L130 PetriNetUnfolder]: 18093/28583 cut-off events. [2023-08-29 19:55:26,178 INFO L131 PetriNetUnfolder]: For 6750/6750 co-relation queries the response was YES. [2023-08-29 19:55:26,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55357 conditions, 28583 events. 18093/28583 cut-off events. For 6750/6750 co-relation queries the response was YES. Maximal size of possible extension queue 1824. Compared 246156 event pairs, 18093 based on Foata normal form. 6372/31629 useless extension candidates. Maximal degree in co-relation 11787. Up to 23554 conditions per place. [2023-08-29 19:55:26,348 INFO L137 encePairwiseOnDemand]: 158/165 looper letters, 24 selfloop transitions, 0 changer transitions 0/42 dead transitions. [2023-08-29 19:55:26,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 42 transitions, 177 flow [2023-08-29 19:55:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:55:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:55:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 169 transitions. [2023-08-29 19:55:26,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121212121212121 [2023-08-29 19:55:26,350 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 169 transitions. [2023-08-29 19:55:26,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 169 transitions. [2023-08-29 19:55:26,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:26,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 169 transitions. [2023-08-29 19:55:26,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states 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 19:55:26,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states 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 19:55:26,352 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states 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 19:55:26,352 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 153 flow. Second operand 2 states and 169 transitions. [2023-08-29 19:55:26,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 42 transitions, 177 flow [2023-08-29 19:55:26,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 42 transitions, 157 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-08-29 19:55:26,360 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 109 flow [2023-08-29 19:55:26,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=109, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-08-29 19:55:26,361 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2023-08-29 19:55:26,361 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 109 flow [2023-08-29 19:55:26,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 19:55:26,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:26,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:26,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 19:55:26,362 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 19:55:26,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:26,362 INFO L85 PathProgramCache]: Analyzing trace with hash 32526, now seen corresponding path program 1 times [2023-08-29 19:55:26,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:26,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505546878] [2023-08-29 19:55:26,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:26,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:26,386 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 19:55:26,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:26,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505546878] [2023-08-29 19:55:26,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505546878] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:26,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:26,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:26,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299603925] [2023-08-29 19:55:26,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:26,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:26,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:26,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:26,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:26,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 165 [2023-08-29 19:55:26,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 19:55:26,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:26,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 165 [2023-08-29 19:55:26,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:27,748 INFO L130 PetriNetUnfolder]: 13314/21416 cut-off events. [2023-08-29 19:55:27,748 INFO L131 PetriNetUnfolder]: For 850/850 co-relation queries the response was YES. [2023-08-29 19:55:27,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40111 conditions, 21416 events. 13314/21416 cut-off events. For 850/850 co-relation queries the response was YES. Maximal size of possible extension queue 1380. Compared 181487 event pairs, 13314 based on Foata normal form. 0/19455 useless extension candidates. Maximal degree in co-relation 40103. Up to 17409 conditions per place. [2023-08-29 19:55:27,870 INFO L137 encePairwiseOnDemand]: 163/165 looper letters, 22 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-29 19:55:27,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 41 transitions, 153 flow [2023-08-29 19:55:27,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:27,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-08-29 19:55:27,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44242424242424244 [2023-08-29 19:55:27,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-08-29 19:55:27,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-08-29 19:55:27,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:27,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-08-29 19:55:27,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 19:55:27,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 19:55:27,875 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 19:55:27,875 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 109 flow. Second operand 3 states and 219 transitions. [2023-08-29 19:55:27,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 41 transitions, 153 flow [2023-08-29 19:55:27,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 41 transitions, 153 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:55:27,876 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 109 flow [2023-08-29 19:55:27,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2023-08-29 19:55:27,878 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-08-29 19:55:27,878 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 109 flow [2023-08-29 19:55:27,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 19:55:27,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:27,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:27,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 19:55:27,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 19:55:27,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:27,879 INFO L85 PathProgramCache]: Analyzing trace with hash 32528, now seen corresponding path program 1 times [2023-08-29 19:55:27,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:27,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733601049] [2023-08-29 19:55:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:27,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:27,904 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 19:55:27,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:27,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733601049] [2023-08-29 19:55:27,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733601049] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:27,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:27,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:27,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009039254] [2023-08-29 19:55:27,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:27,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:27,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:27,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:27,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:27,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 165 [2023-08-29 19:55:27,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 19:55:27,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:27,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 165 [2023-08-29 19:55:27,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:28,904 INFO L130 PetriNetUnfolder]: 8535/14249 cut-off events. [2023-08-29 19:55:28,904 INFO L131 PetriNetUnfolder]: For 850/850 co-relation queries the response was YES. [2023-08-29 19:55:28,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26802 conditions, 14249 events. 8535/14249 cut-off events. For 850/850 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 119202 event pairs, 8535 based on Foata normal form. 0/13653 useless extension candidates. Maximal degree in co-relation 26793. Up to 11265 conditions per place. [2023-08-29 19:55:28,973 INFO L137 encePairwiseOnDemand]: 163/165 looper letters, 21 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-29 19:55:28,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 40 transitions, 151 flow [2023-08-29 19:55:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:28,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-08-29 19:55:28,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42828282828282827 [2023-08-29 19:55:28,975 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-08-29 19:55:28,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-08-29 19:55:28,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:28,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-08-29 19:55:28,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 19:55:28,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 19:55:28,977 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 19:55:28,977 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 109 flow. Second operand 3 states and 212 transitions. [2023-08-29 19:55:28,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 40 transitions, 151 flow [2023-08-29 19:55:28,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 40 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:28,979 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 108 flow [2023-08-29 19:55:28,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2023-08-29 19:55:28,979 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-08-29 19:55:28,979 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 108 flow [2023-08-29 19:55:28,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 19:55:28,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:28,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:28,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 19:55:28,980 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 19:55:28,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:28,981 INFO L85 PathProgramCache]: Analyzing trace with hash 85334936, now seen corresponding path program 1 times [2023-08-29 19:55:28,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:28,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889403561] [2023-08-29 19:55:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:28,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:29,003 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 19:55:29,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:29,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889403561] [2023-08-29 19:55:29,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889403561] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:29,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:29,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:55:29,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951506562] [2023-08-29 19:55:29,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:29,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:29,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:29,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:29,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:29,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 165 [2023-08-29 19:55:29,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 40 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 19:55:29,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:29,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 165 [2023-08-29 19:55:29,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:36,235 INFO L130 PetriNetUnfolder]: 84206/120198 cut-off events. [2023-08-29 19:55:36,236 INFO L131 PetriNetUnfolder]: For 5676/5676 co-relation queries the response was YES. [2023-08-29 19:55:36,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238435 conditions, 120198 events. 84206/120198 cut-off events. For 5676/5676 co-relation queries the response was YES. Maximal size of possible extension queue 6117. Compared 969897 event pairs, 44681 based on Foata normal form. 14930/133185 useless extension candidates. Maximal degree in co-relation 238426. Up to 62881 conditions per place. [2023-08-29 19:55:36,825 INFO L137 encePairwiseOnDemand]: 149/165 looper letters, 46 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2023-08-29 19:55:36,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 292 flow [2023-08-29 19:55:36,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:36,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-29 19:55:36,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44646464646464645 [2023-08-29 19:55:36,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-29 19:55:36,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-29 19:55:36,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:36,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-29 19:55:36,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states 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 19:55:36,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 19:55:36,831 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 19:55:36,831 INFO L175 Difference]: Start difference. First operand has 55 places, 40 transitions, 108 flow. Second operand 3 states and 221 transitions. [2023-08-29 19:55:36,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 292 flow [2023-08-29 19:55:36,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:36,843 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 201 flow [2023-08-29 19:55:36,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-08-29 19:55:36,844 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2023-08-29 19:55:36,844 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 201 flow [2023-08-29 19:55:36,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 19:55:36,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:36,844 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:36,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 19:55:36,845 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 19:55:36,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:36,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1429952854, now seen corresponding path program 1 times [2023-08-29 19:55:36,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:36,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986710860] [2023-08-29 19:55:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:36,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:55:36,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:36,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986710860] [2023-08-29 19:55:36,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986710860] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:36,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:36,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:55:36,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047118206] [2023-08-29 19:55:36,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:36,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:36,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:36,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:36,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:36,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 165 [2023-08-29 19:55:36,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 19:55:36,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:36,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 165 [2023-08-29 19:55:36,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:37,010 INFO L130 PetriNetUnfolder]: 405/1641 cut-off events. [2023-08-29 19:55:37,010 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2023-08-29 19:55:37,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3731 conditions, 1641 events. 405/1641 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 13524 event pairs, 227 based on Foata normal form. 444/2036 useless extension candidates. Maximal degree in co-relation 3721. Up to 436 conditions per place. [2023-08-29 19:55:37,015 INFO L137 encePairwiseOnDemand]: 155/165 looper letters, 0 selfloop transitions, 0 changer transitions 40/40 dead transitions. [2023-08-29 19:55:37,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 40 transitions, 215 flow [2023-08-29 19:55:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:37,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:37,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2023-08-29 19:55:37,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-29 19:55:37,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2023-08-29 19:55:37,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2023-08-29 19:55:37,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:37,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2023-08-29 19:55:37,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 19:55:37,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 19:55:37,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 19:55:37,019 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 201 flow. Second operand 3 states and 231 transitions. [2023-08-29 19:55:37,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 40 transitions, 215 flow [2023-08-29 19:55:37,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 40 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:55:37,024 INFO L231 Difference]: Finished difference. Result has 51 places, 0 transitions, 0 flow [2023-08-29 19:55:37,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=51, PETRI_TRANSITIONS=0} [2023-08-29 19:55:37,025 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2023-08-29 19:55:37,025 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 0 transitions, 0 flow [2023-08-29 19:55:37,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 19:55:37,025 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 9 remaining) [2023-08-29 19:55:37,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-08-29 19:55:37,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 9 remaining) [2023-08-29 19:55:37,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 9 remaining) [2023-08-29 19:55:37,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2023-08-29 19:55:37,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-08-29 19:55:37,027 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-08-29 19:55:37,027 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2023-08-29 19:55:37,027 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-08-29 19:55:37,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 19:55:37,027 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 19:55:37,028 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 19:55:37,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 96 transitions, 237 flow [2023-08-29 19:55:37,039 INFO L130 PetriNetUnfolder]: 11/179 cut-off events. [2023-08-29 19:55:37,039 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 19:55:37,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 179 events. 11/179 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 449 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 162. Up to 12 conditions per place. [2023-08-29 19:55:37,040 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 96 transitions, 237 flow [2023-08-29 19:55:37,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 96 transitions, 237 flow [2023-08-29 19:55:37,041 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:55:37,041 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 96 transitions, 237 flow [2023-08-29 19:55:37,042 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 96 transitions, 237 flow [2023-08-29 19:55:37,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 96 transitions, 237 flow [2023-08-29 19:55:37,051 INFO L130 PetriNetUnfolder]: 11/179 cut-off events. [2023-08-29 19:55:37,051 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 19:55:37,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 179 events. 11/179 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 449 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 162. Up to 12 conditions per place. [2023-08-29 19:55:37,055 INFO L119 LiptonReduction]: Number of co-enabled transitions 5280 [2023-08-29 19:55:38,209 INFO L134 LiptonReduction]: Checked pairs total: 20235 [2023-08-29 19:55:38,209 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-08-29 19:55:38,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 19:55:38,210 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;@24f808d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:55:38,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 19:55:38,216 INFO L130 PetriNetUnfolder]: 4/82 cut-off events. [2023-08-29 19:55:38,216 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-29 19:55:38,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:38,216 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:38,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 19:55:38,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:38,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1783271620, now seen corresponding path program 1 times [2023-08-29 19:55:38,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:38,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390025133] [2023-08-29 19:55:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:38,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:55:38,228 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:55:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:55:38,238 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:55:38,238 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:55:38,238 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 19:55:38,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-29 19:55:38,239 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 19:55:38,239 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 19:55:38,239 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 19:55:38,239 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-29 19:55:38,263 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:55:38,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 109 transitions, 278 flow [2023-08-29 19:55:38,281 INFO L130 PetriNetUnfolder]: 13/209 cut-off events. [2023-08-29 19:55:38,281 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 19:55:38,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 209 events. 13/209 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 533 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 199. Up to 14 conditions per place. [2023-08-29 19:55:38,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 109 transitions, 278 flow [2023-08-29 19:55:38,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 109 transitions, 278 flow [2023-08-29 19:55:38,283 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:55:38,283 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 109 transitions, 278 flow [2023-08-29 19:55:38,284 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 109 transitions, 278 flow [2023-08-29 19:55:38,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 109 transitions, 278 flow [2023-08-29 19:55:38,299 INFO L130 PetriNetUnfolder]: 13/209 cut-off events. [2023-08-29 19:55:38,299 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 19:55:38,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 209 events. 13/209 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 533 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 199. Up to 14 conditions per place. [2023-08-29 19:55:38,305 INFO L119 LiptonReduction]: Number of co-enabled transitions 7272 [2023-08-29 19:55:39,537 INFO L134 LiptonReduction]: Checked pairs total: 27424 [2023-08-29 19:55:39,538 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-29 19:55:39,539 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:55:39,539 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;@24f808d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:55:39,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-29 19:55:39,540 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 19:55:39,540 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:39,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:39,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:39,541 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 19:55:39,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:39,541 INFO L85 PathProgramCache]: Analyzing trace with hash 41006, now seen corresponding path program 1 times [2023-08-29 19:55:39,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:39,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714733759] [2023-08-29 19:55:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:39,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:39,557 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 19:55:39,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:39,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714733759] [2023-08-29 19:55:39,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714733759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:39,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:39,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:39,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40311055] [2023-08-29 19:55:39,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:39,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:39,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:39,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:39,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 183 [2023-08-29 19:55:39,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states 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 19:55:39,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:39,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 183 [2023-08-29 19:55:39,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:46,999 INFO L130 PetriNetUnfolder]: 79106/112488 cut-off events. [2023-08-29 19:55:46,999 INFO L131 PetriNetUnfolder]: For 39518/39518 co-relation queries the response was YES. [2023-08-29 19:55:47,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226303 conditions, 112488 events. 79106/112488 cut-off events. For 39518/39518 co-relation queries the response was YES. Maximal size of possible extension queue 5916. Compared 937253 event pairs, 79106 based on Foata normal form. 23339/122922 useless extension candidates. Maximal degree in co-relation 49276. Up to 98561 conditions per place. [2023-08-29 19:55:47,599 INFO L137 encePairwiseOnDemand]: 174/183 looper letters, 27 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-29 19:55:47,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 50 transitions, 216 flow [2023-08-29 19:55:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2023-08-29 19:55:47,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453551912568306 [2023-08-29 19:55:47,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2023-08-29 19:55:47,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2023-08-29 19:55:47,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:47,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2023-08-29 19:55:47,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states 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 19:55:47,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states 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 19:55:47,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states 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 19:55:47,605 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 182 flow. Second operand 3 states and 249 transitions. [2023-08-29 19:55:47,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 50 transitions, 216 flow [2023-08-29 19:55:47,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 50 transitions, 186 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-29 19:55:47,674 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 132 flow [2023-08-29 19:55:47,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2023-08-29 19:55:47,675 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2023-08-29 19:55:47,675 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 132 flow [2023-08-29 19:55:47,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states 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 19:55:47,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:47,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:47,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-29 19:55:47,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 19:55:47,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:47,676 INFO L85 PathProgramCache]: Analyzing trace with hash 41007, now seen corresponding path program 1 times [2023-08-29 19:55:47,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:47,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239410048] [2023-08-29 19:55:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:47,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:47,704 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 19:55:47,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:47,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239410048] [2023-08-29 19:55:47,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239410048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:47,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:47,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:47,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396519476] [2023-08-29 19:55:47,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:47,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:47,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:47,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:47,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:47,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 183 [2023-08-29 19:55:47,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 50 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states 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 19:55:47,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:47,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 183 [2023-08-29 19:55:47,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:52,628 INFO L130 PetriNetUnfolder]: 51031/74537 cut-off events. [2023-08-29 19:55:52,628 INFO L131 PetriNetUnfolder]: For 3410/3410 co-relation queries the response was YES. [2023-08-29 19:55:52,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143666 conditions, 74537 events. 51031/74537 cut-off events. For 3410/3410 co-relation queries the response was YES. Maximal size of possible extension queue 3970. Compared 618865 event pairs, 51031 based on Foata normal form. 0/69461 useless extension candidates. Maximal degree in co-relation 143654. Up to 64001 conditions per place. [2023-08-29 19:55:53,009 INFO L137 encePairwiseOnDemand]: 181/183 looper letters, 26 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-29 19:55:53,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 49 transitions, 184 flow [2023-08-29 19:55:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-08-29 19:55:53,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44990892531876137 [2023-08-29 19:55:53,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-08-29 19:55:53,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-08-29 19:55:53,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:53,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-08-29 19:55:53,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 19:55:53,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states 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 19:55:53,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states 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 19:55:53,013 INFO L175 Difference]: Start difference. First operand has 65 places, 50 transitions, 132 flow. Second operand 3 states and 247 transitions. [2023-08-29 19:55:53,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 49 transitions, 184 flow [2023-08-29 19:55:53,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 49 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:53,028 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 131 flow [2023-08-29 19:55:53,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2023-08-29 19:55:53,028 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2023-08-29 19:55:53,029 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 131 flow [2023-08-29 19:55:53,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states 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 19:55:53,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:53,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:53,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-29 19:55:53,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 19:55:53,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:53,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1763033356, now seen corresponding path program 1 times [2023-08-29 19:55:53,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:53,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705484134] [2023-08-29 19:55:53,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:53,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:53,049 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 19:55:53,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:53,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705484134] [2023-08-29 19:55:53,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705484134] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:53,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:53,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:55:53,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206641843] [2023-08-29 19:55:53,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:53,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:53,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:53,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:53,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:53,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 183 [2023-08-29 19:55:53,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 19:55:53,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:53,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 183 [2023-08-29 19:55:53,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:43,046 INFO L130 PetriNetUnfolder]: 1011583/1331415 cut-off events. [2023-08-29 19:57:43,060 INFO L131 PetriNetUnfolder]: For 49289/49289 co-relation queries the response was YES. [2023-08-29 19:57:47,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2668514 conditions, 1331415 events. 1011583/1331415 cut-off events. For 49289/49289 co-relation queries the response was YES. Maximal size of possible extension queue 54254. Compared 11077264 event pairs, 548769 based on Foata normal form. 135242/1413507 useless extension candidates. Maximal degree in co-relation 2668501. Up to 691385 conditions per place. [2023-08-29 19:57:54,617 INFO L137 encePairwiseOnDemand]: 162/183 looper letters, 59 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2023-08-29 19:57:54,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 362 flow [2023-08-29 19:57:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:57:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:57:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-08-29 19:57:54,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46265938069216755 [2023-08-29 19:57:54,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-08-29 19:57:54,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-08-29 19:57:54,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:54,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-08-29 19:57:54,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 19:57:54,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states 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 19:57:54,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states 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 19:57:54,624 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 131 flow. Second operand 3 states and 254 transitions. [2023-08-29 19:57:54,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 362 flow