./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/03_incdec.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-ext/03_incdec.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 c1c717c54832d7b18d55a1459c6f740661389c67176a032001ce64e3c282b955 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 02:25:46,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:25:46,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:25:46,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:25:46,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:25:46,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:25:46,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:25:46,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:25:46,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:25:46,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:25:46,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:25:46,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:25:46,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:25:46,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:25:46,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:25:46,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:25:46,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:25:46,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:25:46,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:25:46,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:25:46,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:25:46,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:25:46,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:25:46,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:25:46,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:25:46,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:25:46,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:25:46,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:25:46,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:25:46,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:25:46,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:25:46,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:25:46,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:25:46,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:25:46,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:25:46,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:25:46,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:25:46,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:25:46,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:25:46,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:25:46,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:25:46,722 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 02:25:46,761 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:25:46,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:25:46,763 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:25:46,763 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:25:46,764 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:25:46,764 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:25:46,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:25:46,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:25:46,765 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:25:46,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:25:46,766 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:25:46,766 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:25:46,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:25:46,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:25:46,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:25:46,767 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:25:46,767 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:25:46,767 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:25:46,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:25:46,767 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:25:46,768 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:25:46,768 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:25:46,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:25:46,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:25:46,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:25:46,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:25:46,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:25:46,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:25:46,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 02:25:46,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 02:25:46,770 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:25:46,770 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:25:46,770 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:25:46,770 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:25:46,771 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1c717c54832d7b18d55a1459c6f740661389c67176a032001ce64e3c282b955 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:25:47,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:25:47,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:25:47,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:25:47,113 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:25:47,113 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:25:47,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-08-30 02:25:48,382 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:25:48,639 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:25:48,645 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-08-30 02:25:48,663 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c09ce9682/3014a8e9e802457da6895155287b80d3/FLAGc5fcdbc27 [2023-08-30 02:25:48,675 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c09ce9682/3014a8e9e802457da6895155287b80d3 [2023-08-30 02:25:48,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:25:48,679 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:25:48,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:25:48,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:25:48,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:25:48,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:25:48" (1/1) ... [2023-08-30 02:25:48,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1237aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:48, skipping insertion in model container [2023-08-30 02:25:48,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:25:48" (1/1) ... [2023-08-30 02:25:48,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:25:48,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:25:49,068 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/03_incdec.i[30534,30547] [2023-08-30 02:25:49,078 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/03_incdec.i[30928,30941] [2023-08-30 02:25:49,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:25:49,099 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:25:49,135 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/03_incdec.i[30534,30547] [2023-08-30 02:25:49,142 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/03_incdec.i[30928,30941] [2023-08-30 02:25:49,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:25:49,183 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:25:49,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:49 WrapperNode [2023-08-30 02:25:49,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:25:49,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:25:49,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:25:49,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:25:49,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:49" (1/1) ... [2023-08-30 02:25:49,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:49" (1/1) ... [2023-08-30 02:25:49,245 INFO L138 Inliner]: procedures = 172, calls = 24, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 134 [2023-08-30 02:25:49,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:25:49,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:25:49,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:25:49,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:25:49,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:49" (1/1) ... [2023-08-30 02:25:49,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:49" (1/1) ... [2023-08-30 02:25:49,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:49" (1/1) ... [2023-08-30 02:25:49,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:49" (1/1) ... [2023-08-30 02:25:49,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:49" (1/1) ... [2023-08-30 02:25:49,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:49" (1/1) ... [2023-08-30 02:25:49,287 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:49" (1/1) ... [2023-08-30 02:25:49,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:49" (1/1) ... [2023-08-30 02:25:49,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:25:49,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:25:49,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:25:49,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:25:49,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:49" (1/1) ... [2023-08-30 02:25:49,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:25:49,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:25:49,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 02:25:49,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 02:25:49,378 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 02:25:49,379 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 02:25:49,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 02:25:49,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:25:49,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:25:49,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:25:49,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 02:25:49,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:25:49,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:25:49,381 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 02:25:49,532 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:25:49,538 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:25:49,753 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:25:49,835 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:25:49,835 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 02:25:49,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:25:49 BoogieIcfgContainer [2023-08-30 02:25:49,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:25:49,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:25:49,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:25:49,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:25:49,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:25:48" (1/3) ... [2023-08-30 02:25:49,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b5e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:25:49, skipping insertion in model container [2023-08-30 02:25:49,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:49" (2/3) ... [2023-08-30 02:25:49,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b5e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:25:49, skipping insertion in model container [2023-08-30 02:25:49,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:25:49" (3/3) ... [2023-08-30 02:25:49,844 INFO L112 eAbstractionObserver]: Analyzing ICFG 03_incdec.i [2023-08-30 02:25:49,858 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:25:49,858 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-30 02:25:49,858 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:25:49,923 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:25:49,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 87 transitions, 179 flow [2023-08-30 02:25:49,992 INFO L130 PetriNetUnfolder]: 7/102 cut-off events. [2023-08-30 02:25:49,993 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:49,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 102 events. 7/102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 215 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2023-08-30 02:25:49,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 87 transitions, 179 flow [2023-08-30 02:25:50,002 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 87 transitions, 179 flow [2023-08-30 02:25:50,005 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:25:50,012 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 87 transitions, 179 flow [2023-08-30 02:25:50,019 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 87 transitions, 179 flow [2023-08-30 02:25:50,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 87 transitions, 179 flow [2023-08-30 02:25:50,059 INFO L130 PetriNetUnfolder]: 7/102 cut-off events. [2023-08-30 02:25:50,059 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:50,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 102 events. 7/102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 215 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2023-08-30 02:25:50,063 INFO L119 LiptonReduction]: Number of co-enabled transitions 1908 [2023-08-30 02:25:54,909 INFO L134 LiptonReduction]: Checked pairs total: 1928 [2023-08-30 02:25:54,909 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-30 02:25:54,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:25:54,927 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;@7e2e8c50, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:25:54,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 02:25:54,929 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:25:54,929 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:54,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:54,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:54,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:25:54,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:54,935 INFO L85 PathProgramCache]: Analyzing trace with hash 18526, now seen corresponding path program 1 times [2023-08-30 02:25:54,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:54,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837930318] [2023-08-30 02:25:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:54,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:25:55,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:55,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837930318] [2023-08-30 02:25:55,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837930318] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:55,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:55,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:55,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014778131] [2023-08-30 02:25:55,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:55,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:25:55,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:55,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:25:55,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:25:55,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 202 [2023-08-30 02:25:55,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 12 transitions, 29 flow. Second operand has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 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) [2023-08-30 02:25:55,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:55,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 202 [2023-08-30 02:25:55,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:55,153 INFO L130 PetriNetUnfolder]: 4/19 cut-off events. [2023-08-30 02:25:55,154 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:55,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 19 events. 4/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 32 event pairs, 4 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 26. Up to 19 conditions per place. [2023-08-30 02:25:55,155 INFO L137 encePairwiseOnDemand]: 198/202 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2023-08-30 02:25:55,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 8 transitions, 35 flow [2023-08-30 02:25:55,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:25:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:25:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 151 transitions. [2023-08-30 02:25:55,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37376237623762376 [2023-08-30 02:25:55,171 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 151 transitions. [2023-08-30 02:25:55,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 151 transitions. [2023-08-30 02:25:55,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:55,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 151 transitions. [2023-08-30 02:25:55,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.5) internal successors, (151), 2 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) [2023-08-30 02:25:55,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:55,186 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:55,188 INFO L175 Difference]: Start difference. First operand has 15 places, 12 transitions, 29 flow. Second operand 2 states and 151 transitions. [2023-08-30 02:25:55,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 8 transitions, 35 flow [2023-08-30 02:25:55,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:25:55,193 INFO L231 Difference]: Finished difference. Result has 12 places, 8 transitions, 21 flow [2023-08-30 02:25:55,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=21, PETRI_PLACES=12, PETRI_TRANSITIONS=8} [2023-08-30 02:25:55,197 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, -3 predicate places. [2023-08-30 02:25:55,198 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 8 transitions, 21 flow [2023-08-30 02:25:55,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 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) [2023-08-30 02:25:55,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:55,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:55,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 02:25:55,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:25:55,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:55,207 INFO L85 PathProgramCache]: Analyzing trace with hash 18543, now seen corresponding path program 1 times [2023-08-30 02:25:55,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:55,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783412118] [2023-08-30 02:25:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:55,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:25:55,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:55,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783412118] [2023-08-30 02:25:55,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783412118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:55,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:55,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:55,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201375449] [2023-08-30 02:25:55,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:55,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:25:55,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:55,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:25:55,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:25:55,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 202 [2023-08-30 02:25:55,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 8 transitions, 21 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) [2023-08-30 02:25:55,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:55,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 202 [2023-08-30 02:25:55,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:55,415 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-08-30 02:25:55,415 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:55,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 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 20 event pairs, 3 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 32. Up to 14 conditions per place. [2023-08-30 02:25:55,416 INFO L137 encePairwiseOnDemand]: 200/202 looper letters, 5 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2023-08-30 02:25:55,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 7 transitions, 31 flow [2023-08-30 02:25:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:25:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:25:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-08-30 02:25:55,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-08-30 02:25:55,419 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-08-30 02:25:55,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-08-30 02:25:55,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:55,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-08-30 02:25:55,421 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) [2023-08-30 02:25:55,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:55,423 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:55,423 INFO L175 Difference]: Start difference. First operand has 12 places, 8 transitions, 21 flow. Second operand 3 states and 202 transitions. [2023-08-30 02:25:55,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 7 transitions, 31 flow [2023-08-30 02:25:55,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:25:55,424 INFO L231 Difference]: Finished difference. Result has 13 places, 7 transitions, 21 flow [2023-08-30 02:25:55,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=11, 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=21, PETRI_PLACES=13, PETRI_TRANSITIONS=7} [2023-08-30 02:25:55,425 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, -2 predicate places. [2023-08-30 02:25:55,425 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 7 transitions, 21 flow [2023-08-30 02:25:55,425 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) [2023-08-30 02:25:55,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:55,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:55,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 02:25:55,426 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:25:55,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:55,427 INFO L85 PathProgramCache]: Analyzing trace with hash 18542, now seen corresponding path program 1 times [2023-08-30 02:25:55,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:55,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105029302] [2023-08-30 02:25:55,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:55,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:25:55,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:55,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105029302] [2023-08-30 02:25:55,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105029302] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:55,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:55,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:55,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470266904] [2023-08-30 02:25:55,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:55,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:25:55,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:55,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:25:55,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:25:55,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 202 [2023-08-30 02:25:55,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 7 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:55,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:55,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 202 [2023-08-30 02:25:55,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:55,509 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 02:25:55,510 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:55,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 25. Up to 10 conditions per place. [2023-08-30 02:25:55,510 INFO L137 encePairwiseOnDemand]: 200/202 looper letters, 4 selfloop transitions, 1 changer transitions 0/6 dead transitions. [2023-08-30 02:25:55,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 6 transitions, 29 flow [2023-08-30 02:25:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:25:55,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:25:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2023-08-30 02:25:55,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32673267326732675 [2023-08-30 02:25:55,514 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 198 transitions. [2023-08-30 02:25:55,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 198 transitions. [2023-08-30 02:25:55,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:55,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 198 transitions. [2023-08-30 02:25:55,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:55,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:55,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:55,517 INFO L175 Difference]: Start difference. First operand has 13 places, 7 transitions, 21 flow. Second operand 3 states and 198 transitions. [2023-08-30 02:25:55,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 6 transitions, 29 flow [2023-08-30 02:25:55,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 6 transitions, 28 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:25:55,518 INFO L231 Difference]: Finished difference. Result has 13 places, 6 transitions, 20 flow [2023-08-30 02:25:55,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=13, PETRI_TRANSITIONS=6} [2023-08-30 02:25:55,519 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, -2 predicate places. [2023-08-30 02:25:55,519 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 6 transitions, 20 flow [2023-08-30 02:25:55,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:55,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:55,520 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 02:25:55,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 02:25:55,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:25:55,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:55,521 INFO L85 PathProgramCache]: Analyzing trace with hash -43026421, now seen corresponding path program 1 times [2023-08-30 02:25:55,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:55,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806225100] [2023-08-30 02:25:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:55,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:25:55,539 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:25:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:25:55,570 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:25:55,571 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:25:55,572 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-30 02:25:55,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-08-30 02:25:55,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (5 of 8 remaining) [2023-08-30 02:25:55,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-08-30 02:25:55,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-08-30 02:25:55,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-30 02:25:55,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-08-30 02:25:55,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-08-30 02:25:55,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 02:25:55,576 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 02:25:55,582 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:25:55,582 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 02:25:55,626 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:25:55,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 141 transitions, 294 flow [2023-08-30 02:25:55,680 INFO L130 PetriNetUnfolder]: 13/173 cut-off events. [2023-08-30 02:25:55,680 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:25:55,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 173 events. 13/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 560 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 123. Up to 6 conditions per place. [2023-08-30 02:25:55,683 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 141 transitions, 294 flow [2023-08-30 02:25:55,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 141 transitions, 294 flow [2023-08-30 02:25:55,684 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:25:55,684 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 141 transitions, 294 flow [2023-08-30 02:25:55,685 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 141 transitions, 294 flow [2023-08-30 02:25:55,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 141 transitions, 294 flow [2023-08-30 02:25:55,701 INFO L130 PetriNetUnfolder]: 13/173 cut-off events. [2023-08-30 02:25:55,701 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:25:55,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 173 events. 13/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 560 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 123. Up to 6 conditions per place. [2023-08-30 02:25:55,708 INFO L119 LiptonReduction]: Number of co-enabled transitions 9540 [2023-08-30 02:25:58,236 INFO L134 LiptonReduction]: Checked pairs total: 34292 [2023-08-30 02:25:58,237 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-30 02:25:58,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:25:58,239 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;@7e2e8c50, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:25:58,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 02:25:58,240 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:25:58,240 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:58,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:58,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:58,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:25:58,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:58,241 INFO L85 PathProgramCache]: Analyzing trace with hash 28769, now seen corresponding path program 1 times [2023-08-30 02:25:58,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:58,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292177224] [2023-08-30 02:25:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:58,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:25:58,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:58,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292177224] [2023-08-30 02:25:58,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292177224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:58,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:58,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:58,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815780324] [2023-08-30 02:25:58,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:58,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:25:58,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:58,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:25:58,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:25:58,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 253 [2023-08-30 02:25:58,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 142 flow. Second operand has 2 states, 2 states have (on average 110.0) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:58,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:58,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 253 [2023-08-30 02:25:58,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:58,491 INFO L130 PetriNetUnfolder]: 991/1939 cut-off events. [2023-08-30 02:25:58,492 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2023-08-30 02:25:58,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3469 conditions, 1939 events. 991/1939 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 13700 event pairs, 727 based on Foata normal form. 44/1439 useless extension candidates. Maximal degree in co-relation 1034. Up to 1480 conditions per place. [2023-08-30 02:25:58,506 INFO L137 encePairwiseOnDemand]: 248/253 looper letters, 31 selfloop transitions, 0 changer transitions 0/58 dead transitions. [2023-08-30 02:25:58,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 58 transitions, 190 flow [2023-08-30 02:25:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:25:58,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:25:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 254 transitions. [2023-08-30 02:25:58,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019762845849802 [2023-08-30 02:25:58,509 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 254 transitions. [2023-08-30 02:25:58,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 254 transitions. [2023-08-30 02:25:58,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:58,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 254 transitions. [2023-08-30 02:25:58,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 127.0) internal successors, (254), 2 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) [2023-08-30 02:25:58,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:58,514 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:58,514 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 142 flow. Second operand 2 states and 254 transitions. [2023-08-30 02:25:58,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 58 transitions, 190 flow [2023-08-30 02:25:58,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 58 transitions, 188 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 02:25:58,517 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 126 flow [2023-08-30 02:25:58,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2023-08-30 02:25:58,519 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -3 predicate places. [2023-08-30 02:25:58,519 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 126 flow [2023-08-30 02:25:58,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 110.0) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:58,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:58,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:58,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 02:25:58,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:25:58,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:58,521 INFO L85 PathProgramCache]: Analyzing trace with hash 28779, now seen corresponding path program 1 times [2023-08-30 02:25:58,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:58,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909402499] [2023-08-30 02:25:58,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:58,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:25:58,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:58,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909402499] [2023-08-30 02:25:58,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909402499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:58,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:58,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:58,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556893824] [2023-08-30 02:25:58,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:58,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:25:58,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:58,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:25:58,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:25:58,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 253 [2023-08-30 02:25:58,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:58,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:58,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 253 [2023-08-30 02:25:58,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:58,754 INFO L130 PetriNetUnfolder]: 716/1432 cut-off events. [2023-08-30 02:25:58,754 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-30 02:25:58,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2560 conditions, 1432 events. 716/1432 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9577 event pairs, 518 based on Foata normal form. 0/1080 useless extension candidates. Maximal degree in co-relation 2555. Up to 1082 conditions per place. [2023-08-30 02:25:58,762 INFO L137 encePairwiseOnDemand]: 251/253 looper letters, 29 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-08-30 02:25:58,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 184 flow [2023-08-30 02:25:58,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:25:58,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:25:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-08-30 02:25:58,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479578392621871 [2023-08-30 02:25:58,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-08-30 02:25:58,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-08-30 02:25:58,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:58,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-08-30 02:25:58,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:58,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:58,768 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:58,768 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 126 flow. Second operand 3 states and 340 transitions. [2023-08-30 02:25:58,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 184 flow [2023-08-30 02:25:58,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 184 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:25:58,770 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 126 flow [2023-08-30 02:25:58,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2023-08-30 02:25:58,771 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -2 predicate places. [2023-08-30 02:25:58,771 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 126 flow [2023-08-30 02:25:58,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:58,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:58,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:58,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 02:25:58,772 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:25:58,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:58,772 INFO L85 PathProgramCache]: Analyzing trace with hash 28780, now seen corresponding path program 1 times [2023-08-30 02:25:58,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:58,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265014142] [2023-08-30 02:25:58,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:58,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:25:58,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:58,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265014142] [2023-08-30 02:25:58,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265014142] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:58,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:58,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:58,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126954396] [2023-08-30 02:25:58,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:58,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:25:58,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:58,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:25:58,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:25:58,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 253 [2023-08-30 02:25:58,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:58,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:58,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 253 [2023-08-30 02:25:58,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:58,909 INFO L130 PetriNetUnfolder]: 441/925 cut-off events. [2023-08-30 02:25:58,910 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-30 02:25:58,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1658 conditions, 925 events. 441/925 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5663 event pairs, 309 based on Foata normal form. 0/765 useless extension candidates. Maximal degree in co-relation 1652. Up to 685 conditions per place. [2023-08-30 02:25:58,916 INFO L137 encePairwiseOnDemand]: 251/253 looper letters, 28 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-08-30 02:25:58,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 56 transitions, 182 flow [2023-08-30 02:25:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:25:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:25:58,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-08-30 02:25:58,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-30 02:25:58,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-08-30 02:25:58,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-08-30 02:25:58,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:58,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-08-30 02:25:58,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:58,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:58,922 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:58,922 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 126 flow. Second operand 3 states and 345 transitions. [2023-08-30 02:25:58,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 56 transitions, 182 flow [2023-08-30 02:25:58,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 56 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:25:58,924 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 125 flow [2023-08-30 02:25:58,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2023-08-30 02:25:58,925 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -2 predicate places. [2023-08-30 02:25:58,925 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 125 flow [2023-08-30 02:25:58,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:58,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:58,926 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 02:25:58,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 02:25:58,926 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:25:58,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1984478146, now seen corresponding path program 1 times [2023-08-30 02:25:58,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:58,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258718056] [2023-08-30 02:25:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:58,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:25:58,937 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:25:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:25:58,947 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:25:58,947 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:25:58,947 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-08-30 02:25:58,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2023-08-30 02:25:58,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (7 of 10 remaining) [2023-08-30 02:25:58,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-30 02:25:58,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-08-30 02:25:58,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-08-30 02:25:58,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-08-30 02:25:58,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-08-30 02:25:58,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-08-30 02:25:58,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-08-30 02:25:58,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 02:25:58,949 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 02:25:58,950 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:25:58,950 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 02:25:58,979 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:25:58,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 195 transitions, 411 flow [2023-08-30 02:25:59,004 INFO L130 PetriNetUnfolder]: 19/244 cut-off events. [2023-08-30 02:25:59,005 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 02:25:59,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 244 events. 19/244 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 924 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 177. Up to 8 conditions per place. [2023-08-30 02:25:59,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 195 transitions, 411 flow [2023-08-30 02:25:59,009 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 195 transitions, 411 flow [2023-08-30 02:25:59,009 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:25:59,010 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 195 transitions, 411 flow [2023-08-30 02:25:59,010 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 195 transitions, 411 flow [2023-08-30 02:25:59,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 195 transitions, 411 flow [2023-08-30 02:25:59,033 INFO L130 PetriNetUnfolder]: 19/244 cut-off events. [2023-08-30 02:25:59,033 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 02:25:59,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 244 events. 19/244 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 924 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 177. Up to 8 conditions per place. [2023-08-30 02:25:59,047 INFO L119 LiptonReduction]: Number of co-enabled transitions 22896 [2023-08-30 02:26:02,340 INFO L134 LiptonReduction]: Checked pairs total: 88847 [2023-08-30 02:26:02,341 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-30 02:26:02,342 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:26:02,343 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;@7e2e8c50, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:26:02,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 02:26:02,344 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:26:02,344 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:26:02,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:26:02,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:26:02,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:26:02,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:26:02,344 INFO L85 PathProgramCache]: Analyzing trace with hash 41722, now seen corresponding path program 1 times [2023-08-30 02:26:02,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:26:02,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554705480] [2023-08-30 02:26:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:26:02,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:26:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:26:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:26:02,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:26:02,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554705480] [2023-08-30 02:26:02,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554705480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:26:02,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:26:02,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:26:02,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674778864] [2023-08-30 02:26:02,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:26:02,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:26:02,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:26:02,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:26:02,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:26:02,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 352 [2023-08-30 02:26:02,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 94 transitions, 209 flow. Second operand has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:02,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:26:02,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 352 [2023-08-30 02:26:02,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:26:04,388 INFO L130 PetriNetUnfolder]: 15757/24695 cut-off events. [2023-08-30 02:26:04,388 INFO L131 PetriNetUnfolder]: For 814/814 co-relation queries the response was YES. [2023-08-30 02:26:04,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45957 conditions, 24695 events. 15757/24695 cut-off events. For 814/814 co-relation queries the response was YES. Maximal size of possible extension queue 1452. Compared 197636 event pairs, 11653 based on Foata normal form. 0/19225 useless extension candidates. Maximal degree in co-relation 3439. Up to 20642 conditions per place. [2023-08-30 02:26:04,566 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 44 selfloop transitions, 0 changer transitions 0/82 dead transitions. [2023-08-30 02:26:04,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 82 transitions, 273 flow [2023-08-30 02:26:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:26:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:26:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 347 transitions. [2023-08-30 02:26:04,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928977272727273 [2023-08-30 02:26:04,569 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 347 transitions. [2023-08-30 02:26:04,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 347 transitions. [2023-08-30 02:26:04,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:26:04,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 347 transitions. [2023-08-30 02:26:04,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 173.5) internal successors, (347), 2 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:04,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:04,572 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:04,572 INFO L175 Difference]: Start difference. First operand has 87 places, 94 transitions, 209 flow. Second operand 2 states and 347 transitions. [2023-08-30 02:26:04,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 82 transitions, 273 flow [2023-08-30 02:26:04,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 267 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 02:26:04,576 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 179 flow [2023-08-30 02:26:04,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=179, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2023-08-30 02:26:04,577 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -6 predicate places. [2023-08-30 02:26:04,577 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 179 flow [2023-08-30 02:26:04,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:04,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:26:04,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:26:04,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 02:26:04,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:26:04,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:26:04,579 INFO L85 PathProgramCache]: Analyzing trace with hash 41750, now seen corresponding path program 1 times [2023-08-30 02:26:04,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:26:04,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489364194] [2023-08-30 02:26:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:26:04,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:26:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:26:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:26:04,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:26:04,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489364194] [2023-08-30 02:26:04,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489364194] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:26:04,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:26:04,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:26:04,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613003099] [2023-08-30 02:26:04,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:26:04,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:26:04,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:26:04,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:26:04,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:26:04,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 352 [2023-08-30 02:26:04,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:04,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:26:04,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 352 [2023-08-30 02:26:04,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:26:05,948 INFO L130 PetriNetUnfolder]: 11543/18286 cut-off events. [2023-08-30 02:26:05,949 INFO L131 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2023-08-30 02:26:05,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33908 conditions, 18286 events. 11543/18286 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 1060. Compared 141620 event pairs, 8465 based on Foata normal form. 0/14745 useless extension candidates. Maximal degree in co-relation 33902. Up to 15206 conditions per place. [2023-08-30 02:26:06,082 INFO L137 encePairwiseOnDemand]: 350/352 looper letters, 42 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2023-08-30 02:26:06,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 81 transitions, 263 flow [2023-08-30 02:26:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:26:06,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:26:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-08-30 02:26:06,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44507575757575757 [2023-08-30 02:26:06,085 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-08-30 02:26:06,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-08-30 02:26:06,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:26:06,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-08-30 02:26:06,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:06,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:06,089 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:06,089 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 179 flow. Second operand 3 states and 470 transitions. [2023-08-30 02:26:06,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 81 transitions, 263 flow [2023-08-30 02:26:06,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 263 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:26:06,092 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 179 flow [2023-08-30 02:26:06,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2023-08-30 02:26:06,094 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -5 predicate places. [2023-08-30 02:26:06,095 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 179 flow [2023-08-30 02:26:06,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:06,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:26:06,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:26:06,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 02:26:06,096 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:26:06,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:26:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash 41751, now seen corresponding path program 1 times [2023-08-30 02:26:06,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:26:06,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567169595] [2023-08-30 02:26:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:26:06,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:26:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:26:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:26:06,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:26:06,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567169595] [2023-08-30 02:26:06,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567169595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:26:06,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:26:06,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:26:06,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744156172] [2023-08-30 02:26:06,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:26:06,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:26:06,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:26:06,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:26:06,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:26:06,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 352 [2023-08-30 02:26:06,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:06,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:26:06,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 352 [2023-08-30 02:26:06,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:26:07,131 INFO L130 PetriNetUnfolder]: 7329/11877 cut-off events. [2023-08-30 02:26:07,131 INFO L131 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2023-08-30 02:26:07,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22066 conditions, 11877 events. 7329/11877 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 88360 event pairs, 5277 based on Foata normal form. 0/10265 useless extension candidates. Maximal degree in co-relation 22059. Up to 9771 conditions per place. [2023-08-30 02:26:07,202 INFO L137 encePairwiseOnDemand]: 350/352 looper letters, 41 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-08-30 02:26:07,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 261 flow [2023-08-30 02:26:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:26:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:26:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-08-30 02:26:07,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4498106060606061 [2023-08-30 02:26:07,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-08-30 02:26:07,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-08-30 02:26:07,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:26:07,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-08-30 02:26:07,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:07,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:07,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:07,208 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 179 flow. Second operand 3 states and 475 transitions. [2023-08-30 02:26:07,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 261 flow [2023-08-30 02:26:07,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 80 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:26:07,211 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 178 flow [2023-08-30 02:26:07,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2023-08-30 02:26:07,213 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -5 predicate places. [2023-08-30 02:26:07,213 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 178 flow [2023-08-30 02:26:07,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:07,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:26:07,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:26:07,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 02:26:07,214 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:26:07,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:26:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash -28983223, now seen corresponding path program 1 times [2023-08-30 02:26:07,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:26:07,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164172304] [2023-08-30 02:26:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:26:07,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:26:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:26:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:26:07,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:26:07,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164172304] [2023-08-30 02:26:07,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164172304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:26:07,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:26:07,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:26:07,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755688232] [2023-08-30 02:26:07,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:26:07,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:26:07,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:26:07,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:26:07,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:26:07,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 352 [2023-08-30 02:26:07,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:07,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:26:07,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 352 [2023-08-30 02:26:07,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:26:08,554 INFO L130 PetriNetUnfolder]: 12431/18666 cut-off events. [2023-08-30 02:26:08,554 INFO L131 PetriNetUnfolder]: For 425/425 co-relation queries the response was YES. [2023-08-30 02:26:08,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36239 conditions, 18666 events. 12431/18666 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 1081. Compared 131754 event pairs, 5709 based on Foata normal form. 228/17559 useless extension candidates. Maximal degree in co-relation 36232. Up to 16663 conditions per place. [2023-08-30 02:26:08,642 INFO L137 encePairwiseOnDemand]: 342/352 looper letters, 65 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2023-08-30 02:26:08,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 95 transitions, 356 flow [2023-08-30 02:26:08,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:26:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:26:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-08-30 02:26:08,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-30 02:26:08,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-08-30 02:26:08,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-08-30 02:26:08,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:26:08,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-08-30 02:26:08,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:08,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:08,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:08,648 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 178 flow. Second operand 3 states and 480 transitions. [2023-08-30 02:26:08,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 95 transitions, 356 flow [2023-08-30 02:26:08,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 95 transitions, 355 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:26:08,651 INFO L231 Difference]: Finished difference. Result has 84 places, 83 transitions, 213 flow [2023-08-30 02:26:08,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=84, PETRI_TRANSITIONS=83} [2023-08-30 02:26:08,653 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -3 predicate places. [2023-08-30 02:26:08,653 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 83 transitions, 213 flow [2023-08-30 02:26:08,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:08,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:26:08,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:26:08,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 02:26:08,654 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:26:08,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:26:08,655 INFO L85 PathProgramCache]: Analyzing trace with hash 688999503, now seen corresponding path program 1 times [2023-08-30 02:26:08,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:26:08,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507503140] [2023-08-30 02:26:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:26:08,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:26:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:26:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:26:08,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:26:08,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507503140] [2023-08-30 02:26:08,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507503140] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:26:08,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:26:08,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:26:08,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871028706] [2023-08-30 02:26:08,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:26:08,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:26:08,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:26:08,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:26:08,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:26:08,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 352 [2023-08-30 02:26:08,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 213 flow. Second operand has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:08,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:26:08,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 352 [2023-08-30 02:26:08,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:26:10,909 INFO L130 PetriNetUnfolder]: 21127/32239 cut-off events. [2023-08-30 02:26:10,910 INFO L131 PetriNetUnfolder]: For 3529/3529 co-relation queries the response was YES. [2023-08-30 02:26:11,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66194 conditions, 32239 events. 21127/32239 cut-off events. For 3529/3529 co-relation queries the response was YES. Maximal size of possible extension queue 1893. Compared 250365 event pairs, 7011 based on Foata normal form. 540/30940 useless extension candidates. Maximal degree in co-relation 66186. Up to 13463 conditions per place. [2023-08-30 02:26:11,176 INFO L137 encePairwiseOnDemand]: 341/352 looper letters, 156 selfloop transitions, 14 changer transitions 0/192 dead transitions. [2023-08-30 02:26:11,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 192 transitions, 833 flow [2023-08-30 02:26:11,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:26:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:26:11,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 941 transitions. [2023-08-30 02:26:11,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44554924242424243 [2023-08-30 02:26:11,185 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 941 transitions. [2023-08-30 02:26:11,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 941 transitions. [2023-08-30 02:26:11,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:26:11,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 941 transitions. [2023-08-30 02:26:11,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.83333333333334) internal successors, (941), 6 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:11,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:11,196 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:11,196 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 213 flow. Second operand 6 states and 941 transitions. [2023-08-30 02:26:11,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 192 transitions, 833 flow [2023-08-30 02:26:11,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 192 transitions, 827 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:26:11,210 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 298 flow [2023-08-30 02:26:11,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2023-08-30 02:26:11,211 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-30 02:26:11,211 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 298 flow [2023-08-30 02:26:11,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:11,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:26:11,212 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 02:26:11,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 02:26:11,212 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:26:11,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:26:11,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1328084366, now seen corresponding path program 1 times [2023-08-30 02:26:11,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:26:11,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292910318] [2023-08-30 02:26:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:26:11,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:26:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:26:11,231 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:26:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:26:11,245 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:26:11,245 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:26:11,245 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 12 remaining) [2023-08-30 02:26:11,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (10 of 12 remaining) [2023-08-30 02:26:11,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (9 of 12 remaining) [2023-08-30 02:26:11,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-08-30 02:26:11,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2023-08-30 02:26:11,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 12 remaining) [2023-08-30 02:26:11,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 12 remaining) [2023-08-30 02:26:11,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (4 of 12 remaining) [2023-08-30 02:26:11,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2023-08-30 02:26:11,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2023-08-30 02:26:11,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 12 remaining) [2023-08-30 02:26:11,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (0 of 12 remaining) [2023-08-30 02:26:11,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 02:26:11,249 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-30 02:26:11,250 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:26:11,250 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 02:26:11,291 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:26:11,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 249 transitions, 530 flow [2023-08-30 02:26:11,331 INFO L130 PetriNetUnfolder]: 25/315 cut-off events. [2023-08-30 02:26:11,331 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 02:26:11,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 315 events. 25/315 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1292 event pairs, 0 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 252. Up to 10 conditions per place. [2023-08-30 02:26:11,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 249 transitions, 530 flow [2023-08-30 02:26:11,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 249 transitions, 530 flow [2023-08-30 02:26:11,336 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:26:11,336 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 249 transitions, 530 flow [2023-08-30 02:26:11,337 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 249 transitions, 530 flow [2023-08-30 02:26:11,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 249 transitions, 530 flow [2023-08-30 02:26:11,376 INFO L130 PetriNetUnfolder]: 25/315 cut-off events. [2023-08-30 02:26:11,376 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 02:26:11,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 315 events. 25/315 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1292 event pairs, 0 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 252. Up to 10 conditions per place. [2023-08-30 02:26:11,395 INFO L119 LiptonReduction]: Number of co-enabled transitions 41976 [2023-08-30 02:26:15,541 INFO L134 LiptonReduction]: Checked pairs total: 168051 [2023-08-30 02:26:15,541 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-08-30 02:26:15,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:26:15,543 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;@7e2e8c50, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:26:15,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-08-30 02:26:15,543 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:26:15,543 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:26:15,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:26:15,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:26:15,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-30 02:26:15,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:26:15,544 INFO L85 PathProgramCache]: Analyzing trace with hash 57738, now seen corresponding path program 1 times [2023-08-30 02:26:15,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:26:15,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73024868] [2023-08-30 02:26:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:26:15,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:26:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:26:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:26:15,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:26:15,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73024868] [2023-08-30 02:26:15,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73024868] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:26:15,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:26:15,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:26:15,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818957430] [2023-08-30 02:26:15,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:26:15,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:26:15,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:26:15,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:26:15,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:26:15,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 445 [2023-08-30 02:26:15,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 123 transitions, 278 flow. Second operand has 2 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:15,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:26:15,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 445 [2023-08-30 02:26:15,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:26:36,709 INFO L130 PetriNetUnfolder]: 216169/309887 cut-off events. [2023-08-30 02:26:36,710 INFO L131 PetriNetUnfolder]: For 14298/14298 co-relation queries the response was YES. [2023-08-30 02:26:37,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582758 conditions, 309887 events. 216169/309887 cut-off events. For 14298/14298 co-relation queries the response was YES. Maximal size of possible extension queue 13867. Compared 2756018 event pairs, 160477 based on Foata normal form. 9278/255171 useless extension candidates. Maximal degree in co-relation 46561. Up to 265014 conditions per place. [2023-08-30 02:26:38,736 INFO L137 encePairwiseOnDemand]: 436/445 looper letters, 57 selfloop transitions, 0 changer transitions 0/109 dead transitions. [2023-08-30 02:26:38,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 109 transitions, 364 flow [2023-08-30 02:26:38,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:26:38,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:26:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 440 transitions. [2023-08-30 02:26:38,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943820224719101 [2023-08-30 02:26:38,738 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 440 transitions. [2023-08-30 02:26:38,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 440 transitions. [2023-08-30 02:26:38,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:26:38,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 440 transitions. [2023-08-30 02:26:38,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 220.0) internal successors, (440), 2 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:38,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 445.0) internal successors, (1335), 3 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:38,743 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 445.0) internal successors, (1335), 3 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:38,743 INFO L175 Difference]: Start difference. First operand has 113 places, 123 transitions, 278 flow. Second operand 2 states and 440 transitions. [2023-08-30 02:26:38,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 109 transitions, 364 flow [2023-08-30 02:26:38,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 109 transitions, 352 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 02:26:38,752 INFO L231 Difference]: Finished difference. Result has 107 places, 109 transitions, 238 flow [2023-08-30 02:26:38,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=238, PETRI_PLACES=107, PETRI_TRANSITIONS=109} [2023-08-30 02:26:38,753 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -6 predicate places. [2023-08-30 02:26:38,753 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 109 transitions, 238 flow [2023-08-30 02:26:38,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:38,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:26:38,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:26:38,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 02:26:38,754 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-30 02:26:38,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:26:38,754 INFO L85 PathProgramCache]: Analyzing trace with hash 57760, now seen corresponding path program 1 times [2023-08-30 02:26:38,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:26:38,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929721227] [2023-08-30 02:26:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:26:38,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:26:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:26:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:26:38,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:26:38,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929721227] [2023-08-30 02:26:38,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929721227] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:26:38,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:26:38,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:26:38,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346691339] [2023-08-30 02:26:38,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:26:38,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:26:38,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:26:38,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:26:38,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:26:38,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 445 [2023-08-30 02:26:38,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:38,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:26:38,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 445 [2023-08-30 02:26:38,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:26:53,351 INFO L130 PetriNetUnfolder]: 159377/230053 cut-off events. [2023-08-30 02:26:53,351 INFO L131 PetriNetUnfolder]: For 3520/3520 co-relation queries the response was YES. [2023-08-30 02:26:53,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430182 conditions, 230053 events. 159377/230053 cut-off events. For 3520/3520 co-relation queries the response was YES. Maximal size of possible extension queue 10222. Compared 2003839 event pairs, 117608 based on Foata normal form. 0/187674 useless extension candidates. Maximal degree in co-relation 430175. Up to 196010 conditions per place. [2023-08-30 02:26:55,004 INFO L137 encePairwiseOnDemand]: 443/445 looper letters, 55 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-08-30 02:26:55,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 108 transitions, 348 flow [2023-08-30 02:26:55,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:26:55,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:26:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 606 transitions. [2023-08-30 02:26:55,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45393258426966293 [2023-08-30 02:26:55,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 606 transitions. [2023-08-30 02:26:55,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 606 transitions. [2023-08-30 02:26:55,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:26:55,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 606 transitions. [2023-08-30 02:26:55,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:55,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:55,011 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:55,011 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 238 flow. Second operand 3 states and 606 transitions. [2023-08-30 02:26:55,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 108 transitions, 348 flow [2023-08-30 02:26:55,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 108 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:26:55,014 INFO L231 Difference]: Finished difference. Result has 108 places, 108 transitions, 238 flow [2023-08-30 02:26:55,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=108, PETRI_TRANSITIONS=108} [2023-08-30 02:26:55,014 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -5 predicate places. [2023-08-30 02:26:55,015 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 108 transitions, 238 flow [2023-08-30 02:26:55,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:55,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:26:55,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:26:55,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 02:26:55,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-30 02:26:55,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:26:55,016 INFO L85 PathProgramCache]: Analyzing trace with hash 57759, now seen corresponding path program 1 times [2023-08-30 02:26:55,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:26:55,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015346970] [2023-08-30 02:26:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:26:55,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:26:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:26:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:26:55,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:26:55,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015346970] [2023-08-30 02:26:55,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015346970] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:26:55,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:26:55,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:26:55,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973325369] [2023-08-30 02:26:55,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:26:55,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:26:55,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:26:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:26:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:26:55,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 445 [2023-08-30 02:26:55,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 108 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:26:55,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:26:55,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 445 [2023-08-30 02:26:55,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:27:04,403 INFO L130 PetriNetUnfolder]: 102585/150219 cut-off events. [2023-08-30 02:27:04,404 INFO L131 PetriNetUnfolder]: For 3520/3520 co-relation queries the response was YES. [2023-08-30 02:27:04,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281347 conditions, 150219 events. 102585/150219 cut-off events. For 3520/3520 co-relation queries the response was YES. Maximal size of possible extension queue 6632. Compared 1278164 event pairs, 74739 based on Foata normal form. 0/129455 useless extension candidates. Maximal degree in co-relation 281339. Up to 127007 conditions per place. [2023-08-30 02:27:05,365 INFO L137 encePairwiseOnDemand]: 443/445 looper letters, 54 selfloop transitions, 1 changer transitions 0/107 dead transitions. [2023-08-30 02:27:05,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 107 transitions, 346 flow [2023-08-30 02:27:05,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:27:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:27:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2023-08-30 02:27:05,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.448689138576779 [2023-08-30 02:27:05,367 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2023-08-30 02:27:05,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2023-08-30 02:27:05,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:27:05,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2023-08-30 02:27:05,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:27:05,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:27:05,372 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:27:05,372 INFO L175 Difference]: Start difference. First operand has 108 places, 108 transitions, 238 flow. Second operand 3 states and 599 transitions. [2023-08-30 02:27:05,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 107 transitions, 346 flow [2023-08-30 02:27:05,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 107 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:27:05,380 INFO L231 Difference]: Finished difference. Result has 108 places, 107 transitions, 237 flow [2023-08-30 02:27:05,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=237, PETRI_PLACES=108, PETRI_TRANSITIONS=107} [2023-08-30 02:27:05,380 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -5 predicate places. [2023-08-30 02:27:05,380 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 107 transitions, 237 flow [2023-08-30 02:27:05,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:27:05,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:27:05,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:27:05,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 02:27:05,381 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-30 02:27:05,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:27:05,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1909539921, now seen corresponding path program 1 times [2023-08-30 02:27:05,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:27:05,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487861881] [2023-08-30 02:27:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:27:05,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:27:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:27:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:27:05,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:27:05,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487861881] [2023-08-30 02:27:05,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487861881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:27:05,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:27:05,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:27:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605989947] [2023-08-30 02:27:05,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:27:05,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:27:05,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:27:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:27:05,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:27:05,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 445 [2023-08-30 02:27:05,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 107 transitions, 237 flow. Second operand has 5 states, 5 states have (on average 163.8) internal successors, (819), 5 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:27:05,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:27:05,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 445 [2023-08-30 02:27:05,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:28:06,408 INFO L130 PetriNetUnfolder]: 614509/846071 cut-off events. [2023-08-30 02:28:06,408 INFO L131 PetriNetUnfolder]: For 14428/14428 co-relation queries the response was YES. [2023-08-30 02:28:08,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1643060 conditions, 846071 events. 614509/846071 cut-off events. For 14428/14428 co-relation queries the response was YES. Maximal size of possible extension queue 35234. Compared 7385001 event pairs, 226765 based on Foata normal form. 7352/752189 useless extension candidates. Maximal degree in co-relation 1643052. Up to 389759 conditions per place. [2023-08-30 02:28:12,019 INFO L137 encePairwiseOnDemand]: 422/445 looper letters, 219 selfloop transitions, 18 changer transitions 0/267 dead transitions. [2023-08-30 02:28:12,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 267 transitions, 1081 flow [2023-08-30 02:28:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:28:12,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:28:12,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1228 transitions. [2023-08-30 02:28:12,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599250936329588 [2023-08-30 02:28:12,022 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1228 transitions. [2023-08-30 02:28:12,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1228 transitions. [2023-08-30 02:28:12,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:28:12,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1228 transitions. [2023-08-30 02:28:12,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 204.66666666666666) internal successors, (1228), 6 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:28:12,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 445.0) internal successors, (3115), 7 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:28:12,029 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 445.0) internal successors, (3115), 7 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:28:12,029 INFO L175 Difference]: Start difference. First operand has 108 places, 107 transitions, 237 flow. Second operand 6 states and 1228 transitions. [2023-08-30 02:28:12,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 267 transitions, 1081 flow [2023-08-30 02:28:12,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 267 transitions, 1080 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:28:12,061 INFO L231 Difference]: Finished difference. Result has 116 places, 126 transitions, 400 flow [2023-08-30 02:28:12,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=400, PETRI_PLACES=116, PETRI_TRANSITIONS=126} [2023-08-30 02:28:12,062 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, 3 predicate places. [2023-08-30 02:28:12,062 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 126 transitions, 400 flow [2023-08-30 02:28:12,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 163.8) internal successors, (819), 5 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:28:12,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:28:12,062 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:28:12,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 02:28:12,063 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-30 02:28:12,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:28:12,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1002374193, now seen corresponding path program 1 times [2023-08-30 02:28:12,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:28:12,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973804087] [2023-08-30 02:28:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:28:12,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:28:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:28:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 02:28:12,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:28:12,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973804087] [2023-08-30 02:28:12,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973804087] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:28:12,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:28:12,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:28:12,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848057009] [2023-08-30 02:28:12,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:28:12,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:28:12,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:28:12,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:28:12,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:28:12,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 445 [2023-08-30 02:28:12,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 126 transitions, 400 flow. Second operand has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:28:12,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:28:12,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 445 [2023-08-30 02:28:12,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:29:52,778 INFO L130 PetriNetUnfolder]: 867883/1210474 cut-off events. [2023-08-30 02:29:52,778 INFO L131 PetriNetUnfolder]: For 417476/440932 co-relation queries the response was YES. [2023-08-30 02:29:58,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2671473 conditions, 1210474 events. 867883/1210474 cut-off events. For 417476/440932 co-relation queries the response was YES. Maximal size of possible extension queue 51554. Compared 11315938 event pairs, 328035 based on Foata normal form. 17628/1147237 useless extension candidates. Maximal degree in co-relation 2671461. Up to 569834 conditions per place. [2023-08-30 02:30:06,026 INFO L137 encePairwiseOnDemand]: 431/445 looper letters, 233 selfloop transitions, 28 changer transitions 0/293 dead transitions. [2023-08-30 02:30:06,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 293 transitions, 1447 flow [2023-08-30 02:30:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:30:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:30:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1210 transitions. [2023-08-30 02:30:06,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45318352059925093 [2023-08-30 02:30:06,030 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1210 transitions. [2023-08-30 02:30:06,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1210 transitions. [2023-08-30 02:30:06,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:30:06,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1210 transitions. [2023-08-30 02:30:06,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.66666666666666) internal successors, (1210), 6 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:30:06,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 445.0) internal successors, (3115), 7 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:30:06,046 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 445.0) internal successors, (3115), 7 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:30:06,046 INFO L175 Difference]: Start difference. First operand has 116 places, 126 transitions, 400 flow. Second operand 6 states and 1210 transitions. [2023-08-30 02:30:06,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 293 transitions, 1447 flow [2023-08-30 02:30:18,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 293 transitions, 1447 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:30:18,973 INFO L231 Difference]: Finished difference. Result has 123 places, 145 transitions, 605 flow [2023-08-30 02:30:18,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=605, PETRI_PLACES=123, PETRI_TRANSITIONS=145} [2023-08-30 02:30:18,980 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, 10 predicate places. [2023-08-30 02:30:18,981 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 145 transitions, 605 flow [2023-08-30 02:30:18,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:30:18,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:30:18,981 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 02:30:18,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 02:30:18,982 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-30 02:30:18,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:30:18,982 INFO L85 PathProgramCache]: Analyzing trace with hash 88719496, now seen corresponding path program 1 times [2023-08-30 02:30:18,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:30:18,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800236598] [2023-08-30 02:30:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:30:18,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:30:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:30:19,034 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:30:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:30:19,066 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:30:19,066 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:30:19,066 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 14 remaining) [2023-08-30 02:30:19,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (12 of 14 remaining) [2023-08-30 02:30:19,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (11 of 14 remaining) [2023-08-30 02:30:19,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2023-08-30 02:30:19,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2023-08-30 02:30:19,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (8 of 14 remaining) [2023-08-30 02:30:19,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 14 remaining) [2023-08-30 02:30:19,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2023-08-30 02:30:19,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 14 remaining) [2023-08-30 02:30:19,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (4 of 14 remaining) [2023-08-30 02:30:19,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 14 remaining) [2023-08-30 02:30:19,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (2 of 14 remaining) [2023-08-30 02:30:19,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 14 remaining) [2023-08-30 02:30:19,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2023-08-30 02:30:19,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 02:30:19,068 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-30 02:30:19,068 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:30:19,068 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 02:30:19,120 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:30:19,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 288 places, 303 transitions, 651 flow [2023-08-30 02:30:19,191 INFO L130 PetriNetUnfolder]: 31/386 cut-off events. [2023-08-30 02:30:19,191 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 02:30:19,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 386 events. 31/386 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1636 event pairs, 0 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 328. Up to 12 conditions per place. [2023-08-30 02:30:19,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 288 places, 303 transitions, 651 flow [2023-08-30 02:30:19,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 288 places, 303 transitions, 651 flow [2023-08-30 02:30:19,217 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:30:19,217 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 288 places, 303 transitions, 651 flow [2023-08-30 02:30:19,217 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 288 places, 303 transitions, 651 flow [2023-08-30 02:30:19,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 288 places, 303 transitions, 651 flow [2023-08-30 02:30:19,263 INFO L130 PetriNetUnfolder]: 31/386 cut-off events. [2023-08-30 02:30:19,263 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 02:30:19,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 386 events. 31/386 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1636 event pairs, 0 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 328. Up to 12 conditions per place. [2023-08-30 02:30:19,287 INFO L119 LiptonReduction]: Number of co-enabled transitions 66780 [2023-08-30 02:30:24,533 INFO L134 LiptonReduction]: Checked pairs total: 277073 [2023-08-30 02:30:24,533 INFO L136 LiptonReduction]: Total number of compositions: 243 [2023-08-30 02:30:24,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:30:24,535 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;@7e2e8c50, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:30:24,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-30 02:30:24,535 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:30:24,536 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:30:24,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:30:24,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:30:24,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-30 02:30:24,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:30:24,536 INFO L85 PathProgramCache]: Analyzing trace with hash 76899, now seen corresponding path program 1 times [2023-08-30 02:30:24,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:30:24,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6266922] [2023-08-30 02:30:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:30:24,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:30:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:30:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:30:24,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:30:24,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6266922] [2023-08-30 02:30:24,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6266922] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:30:24,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:30:24,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:30:24,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70481305] [2023-08-30 02:30:24,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:30:24,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:30:24,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:30:24,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:30:24,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:30:24,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 546 [2023-08-30 02:30:24,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 154 transitions, 353 flow. Second operand has 2 states, 2 states have (on average 227.0) internal successors, (454), 2 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:30:24,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:30:24,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 546 [2023-08-30 02:30:24,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand