./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/stack-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/stack-2.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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 19:42:08,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:42:08,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:42:09,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:42:09,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:42:09,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:42:09,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:42:09,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:42:09,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:42:09,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:42:09,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:42:09,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:42:09,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:42:09,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:42:09,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:42:09,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:42:09,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:42:09,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:42:09,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:42:09,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:42:09,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:42:09,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:42:09,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:42:09,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:42:09,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:42:09,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:42:09,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:42:09,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:42:09,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:42:09,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:42:09,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:42:09,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:42:09,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:42:09,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:42:09,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:42:09,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:42:09,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:42:09,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:42:09,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:42:09,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:42:09,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:42:09,077 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:42:09,111 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:42:09,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:42:09,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:42:09,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:42:09,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:42:09,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:42:09,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:42:09,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:42:09,115 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:42:09,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:42:09,116 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:42:09,116 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:42:09,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:42:09,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:42:09,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:42:09,117 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:42:09,117 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:42:09,117 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:42:09,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:42:09,117 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:42:09,118 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:42:09,118 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:42:09,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:42:09,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:42:09,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:42:09,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:42:09,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:42:09,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:42:09,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:42:09,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:42:09,120 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:42:09,120 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:42:09,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:42:09,120 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:42:09,121 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:42:09,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:42:09,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:42:09,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:42:09,436 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:42:09,436 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:42:09,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-2.i [2023-08-29 19:42:10,700 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:42:10,970 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:42:10,976 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i [2023-08-29 19:42:10,998 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d2ae6ded/a2def12b907541f883752dec38c11798/FLAG47403fb1d [2023-08-29 19:42:11,009 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d2ae6ded/a2def12b907541f883752dec38c11798 [2023-08-29 19:42:11,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:42:11,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:42:11,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:42:11,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:42:11,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:42:11,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:42:11" (1/1) ... [2023-08-29 19:42:11,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78892bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:11, skipping insertion in model container [2023-08-29 19:42:11,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:42:11" (1/1) ... [2023-08-29 19:42:11,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:42:11,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:42:11,397 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/stack-2.i[41520,41533] [2023-08-29 19:42:11,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:42:11,427 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:42:11,479 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/stack-2.i[41520,41533] [2023-08-29 19:42:11,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:42:11,570 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:42:11,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:11 WrapperNode [2023-08-29 19:42:11,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:42:11,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:42:11,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:42:11,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:42:11,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:11" (1/1) ... [2023-08-29 19:42:11,606 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:11" (1/1) ... [2023-08-29 19:42:11,644 INFO L138 Inliner]: procedures = 277, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 160 [2023-08-29 19:42:11,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:42:11,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:42:11,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:42:11,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:42:11,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:11" (1/1) ... [2023-08-29 19:42:11,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:11" (1/1) ... [2023-08-29 19:42:11,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:11" (1/1) ... [2023-08-29 19:42:11,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:11" (1/1) ... [2023-08-29 19:42:11,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:11" (1/1) ... [2023-08-29 19:42:11,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:11" (1/1) ... [2023-08-29 19:42:11,687 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:11" (1/1) ... [2023-08-29 19:42:11,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:11" (1/1) ... [2023-08-29 19:42:11,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:42:11,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:42:11,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:42:11,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:42:11,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:11" (1/1) ... [2023-08-29 19:42:11,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:42:11,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:42:11,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 19:42:11,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 19:42:11,772 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-29 19:42:11,772 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-29 19:42:11,773 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-29 19:42:11,773 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-29 19:42:11,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:42:11,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:42:11,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 19:42:11,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:42:11,773 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 19:42:11,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:42:11,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:42:11,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:42:11,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:42:11,775 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 19:42:11,915 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:42:11,917 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:42:12,256 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:42:12,263 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:42:12,263 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 19:42:12,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:42:12 BoogieIcfgContainer [2023-08-29 19:42:12,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:42:12,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:42:12,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:42:12,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:42:12,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:42:11" (1/3) ... [2023-08-29 19:42:12,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7713351b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:42:12, skipping insertion in model container [2023-08-29 19:42:12,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:11" (2/3) ... [2023-08-29 19:42:12,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7713351b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:42:12, skipping insertion in model container [2023-08-29 19:42:12,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:42:12" (3/3) ... [2023-08-29 19:42:12,276 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-08-29 19:42:12,290 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:42:12,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-29 19:42:12,291 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:42:12,383 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 19:42:12,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 178 transitions, 372 flow [2023-08-29 19:42:12,472 INFO L130 PetriNetUnfolder]: 10/176 cut-off events. [2023-08-29 19:42:12,472 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:42:12,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 176 events. 10/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 443 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-08-29 19:42:12,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 178 transitions, 372 flow [2023-08-29 19:42:12,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 172 transitions, 356 flow [2023-08-29 19:42:12,491 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:42:12,499 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 172 transitions, 356 flow [2023-08-29 19:42:12,501 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 172 transitions, 356 flow [2023-08-29 19:42:12,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 172 transitions, 356 flow [2023-08-29 19:42:12,537 INFO L130 PetriNetUnfolder]: 10/172 cut-off events. [2023-08-29 19:42:12,537 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:42:12,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 10/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 443 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-08-29 19:42:12,544 INFO L119 LiptonReduction]: Number of co-enabled transitions 8718 [2023-08-29 19:42:16,978 INFO L134 LiptonReduction]: Checked pairs total: 13531 [2023-08-29 19:42:16,979 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-08-29 19:42:16,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:42:16,996 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;@67d1ea87, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:42:16,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-29 19:42:16,999 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 19:42:16,999 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:42:16,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:17,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:42:17,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:17,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:17,004 INFO L85 PathProgramCache]: Analyzing trace with hash 725, now seen corresponding path program 1 times [2023-08-29 19:42:17,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:17,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282132845] [2023-08-29 19:42:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:17,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:17,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:17,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282132845] [2023-08-29 19:42:17,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282132845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:17,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:17,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:42:17,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590721577] [2023-08-29 19:42:17,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:17,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:42:17,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:17,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:42:17,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:42:17,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 351 [2023-08-29 19:42:17,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 167.5) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:17,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:17,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 351 [2023-08-29 19:42:17,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:17,502 INFO L130 PetriNetUnfolder]: 1445/2244 cut-off events. [2023-08-29 19:42:17,502 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-29 19:42:17,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4513 conditions, 2244 events. 1445/2244 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10421 event pairs, 1169 based on Foata normal form. 0/1236 useless extension candidates. Maximal degree in co-relation 4244. Up to 2225 conditions per place. [2023-08-29 19:42:17,517 INFO L137 encePairwiseOnDemand]: 349/351 looper letters, 44 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-29 19:42:17,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 190 flow [2023-08-29 19:42:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:42:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:42:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 380 transitions. [2023-08-29 19:42:17,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413105413105413 [2023-08-29 19:42:17,530 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 380 transitions. [2023-08-29 19:42:17,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 380 transitions. [2023-08-29 19:42:17,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:17,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 380 transitions. [2023-08-29 19:42:17,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 190.0) internal successors, (380), 2 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:17,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:17,543 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:17,544 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 380 transitions. [2023-08-29 19:42:17,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 190 flow [2023-08-29 19:42:17,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:42:17,549 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-29 19:42:17,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-29 19:42:17,554 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-29 19:42:17,555 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-29 19:42:17,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 167.5) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:17,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:17,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:42:17,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:42:17,556 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:17,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:17,557 INFO L85 PathProgramCache]: Analyzing trace with hash 711496, now seen corresponding path program 1 times [2023-08-29 19:42:17,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:17,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237243550] [2023-08-29 19:42:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:17,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:17,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:17,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237243550] [2023-08-29 19:42:17,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237243550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:17,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:17,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:42:17,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607795483] [2023-08-29 19:42:17,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:17,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:17,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:17,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:17,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:17,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 351 [2023-08-29 19:42:17,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:17,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:17,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 351 [2023-08-29 19:42:17,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:17,996 INFO L130 PetriNetUnfolder]: 1416/2188 cut-off events. [2023-08-29 19:42:17,996 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 19:42:17,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4373 conditions, 2188 events. 1416/2188 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10060 event pairs, 1145 based on Foata normal form. 0/1217 useless extension candidates. Maximal degree in co-relation 4370. Up to 2168 conditions per place. [2023-08-29 19:42:18,007 INFO L137 encePairwiseOnDemand]: 347/351 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-29 19:42:18,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 174 flow [2023-08-29 19:42:18,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:18,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-29 19:42:18,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919278252611586 [2023-08-29 19:42:18,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-29 19:42:18,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-29 19:42:18,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:18,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-29 19:42:18,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,016 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 518 transitions. [2023-08-29 19:42:18,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 174 flow [2023-08-29 19:42:18,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:42:18,018 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-08-29 19:42:18,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-29 19:42:18,019 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-29 19:42:18,019 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-08-29 19:42:18,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:18,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:42:18,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:42:18,020 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:18,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:18,021 INFO L85 PathProgramCache]: Analyzing trace with hash 711497, now seen corresponding path program 1 times [2023-08-29 19:42:18,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:18,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850460954] [2023-08-29 19:42:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:18,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:18,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:18,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850460954] [2023-08-29 19:42:18,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850460954] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:18,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:18,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:42:18,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919212682] [2023-08-29 19:42:18,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:18,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:18,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:18,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:18,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:18,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 351 [2023-08-29 19:42:18,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:18,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 351 [2023-08-29 19:42:18,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:18,350 INFO L130 PetriNetUnfolder]: 1387/2132 cut-off events. [2023-08-29 19:42:18,351 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 19:42:18,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4265 conditions, 2132 events. 1387/2132 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9708 event pairs, 1121 based on Foata normal form. 0/1198 useless extension candidates. Maximal degree in co-relation 4261. Up to 2113 conditions per place. [2023-08-29 19:42:18,361 INFO L137 encePairwiseOnDemand]: 347/351 looper letters, 38 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-29 19:42:18,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 170 flow [2023-08-29 19:42:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-29 19:42:18,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014245014245015 [2023-08-29 19:42:18,364 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-29 19:42:18,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-29 19:42:18,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:18,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-29 19:42:18,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,368 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,368 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 528 transitions. [2023-08-29 19:42:18,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 170 flow [2023-08-29 19:42:18,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:18,370 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-08-29 19:42:18,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-29 19:42:18,371 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-29 19:42:18,371 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-08-29 19:42:18,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:18,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:42:18,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:42:18,372 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:18,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:18,373 INFO L85 PathProgramCache]: Analyzing trace with hash 683763408, now seen corresponding path program 1 times [2023-08-29 19:42:18,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:18,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452732864] [2023-08-29 19:42:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:18,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:18,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:18,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452732864] [2023-08-29 19:42:18,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452732864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:18,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:18,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:42:18,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938226558] [2023-08-29 19:42:18,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:18,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:18,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:18,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:18,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:18,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 351 [2023-08-29 19:42:18,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:18,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 351 [2023-08-29 19:42:18,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:18,642 INFO L130 PetriNetUnfolder]: 1013/1586 cut-off events. [2023-08-29 19:42:18,643 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 19:42:18,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3177 conditions, 1586 events. 1013/1586 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6956 event pairs, 811 based on Foata normal form. 0/964 useless extension candidates. Maximal degree in co-relation 3173. Up to 1571 conditions per place. [2023-08-29 19:42:18,652 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-29 19:42:18,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 166 flow [2023-08-29 19:42:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2023-08-29 19:42:18,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49952516619183285 [2023-08-29 19:42:18,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2023-08-29 19:42:18,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2023-08-29 19:42:18,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:18,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2023-08-29 19:42:18,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,661 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 526 transitions. [2023-08-29 19:42:18,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 166 flow [2023-08-29 19:42:18,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:18,663 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-29 19:42:18,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-29 19:42:18,663 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-29 19:42:18,664 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-29 19:42:18,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:18,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:42:18,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:42:18,664 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:18,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:18,665 INFO L85 PathProgramCache]: Analyzing trace with hash 683763409, now seen corresponding path program 1 times [2023-08-29 19:42:18,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:18,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757547345] [2023-08-29 19:42:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:18,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:18,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:18,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757547345] [2023-08-29 19:42:18,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757547345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:18,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:18,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:42:18,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122289001] [2023-08-29 19:42:18,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:18,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:42:18,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:18,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:42:18,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:42:18,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 351 [2023-08-29 19:42:18,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:18,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 351 [2023-08-29 19:42:18,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:18,887 INFO L130 PetriNetUnfolder]: 639/1040 cut-off events. [2023-08-29 19:42:18,887 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-29 19:42:18,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2089 conditions, 1040 events. 639/1040 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4363 event pairs, 501 based on Foata normal form. 0/730 useless extension candidates. Maximal degree in co-relation 2085. Up to 1029 conditions per place. [2023-08-29 19:42:18,892 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 36 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-29 19:42:18,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 162 flow [2023-08-29 19:42:18,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-29 19:42:18,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4757834757834758 [2023-08-29 19:42:18,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-29 19:42:18,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-29 19:42:18,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:18,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-29 19:42:18,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,899 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,899 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 501 transitions. [2023-08-29 19:42:18,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 162 flow [2023-08-29 19:42:18,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:18,901 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-29 19:42:18,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-29 19:42:18,901 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-08-29 19:42:18,902 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-29 19:42:18,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:18,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:42:18,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:42:18,903 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:18,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:18,903 INFO L85 PathProgramCache]: Analyzing trace with hash -279076636, now seen corresponding path program 1 times [2023-08-29 19:42:18,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:18,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752995324] [2023-08-29 19:42:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:18,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:18,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:18,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752995324] [2023-08-29 19:42:18,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752995324] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:18,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:18,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:42:18,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107529760] [2023-08-29 19:42:18,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:18,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:18,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:18,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:18,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:18,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 351 [2023-08-29 19:42:18,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:18,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:18,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 351 [2023-08-29 19:42:18,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:19,113 INFO L130 PetriNetUnfolder]: 1075/1756 cut-off events. [2023-08-29 19:42:19,113 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-29 19:42:19,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3520 conditions, 1756 events. 1075/1756 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7943 event pairs, 312 based on Foata normal form. 0/1258 useless extension candidates. Maximal degree in co-relation 3516. Up to 1042 conditions per place. [2023-08-29 19:42:19,121 INFO L137 encePairwiseOnDemand]: 346/351 looper letters, 65 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-08-29 19:42:19,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 70 transitions, 291 flow [2023-08-29 19:42:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:19,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-08-29 19:42:19,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5308641975308642 [2023-08-29 19:42:19,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-08-29 19:42:19,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-08-29 19:42:19,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:19,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-08-29 19:42:19,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:19,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:19,128 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:19,128 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 559 transitions. [2023-08-29 19:42:19,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 70 transitions, 291 flow [2023-08-29 19:42:19,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 70 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:19,130 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 112 flow [2023-08-29 19:42:19,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-08-29 19:42:19,130 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-29 19:42:19,131 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 112 flow [2023-08-29 19:42:19,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:19,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:19,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:42:19,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:42:19,132 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:19,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:19,132 INFO L85 PathProgramCache]: Analyzing trace with hash -279078099, now seen corresponding path program 1 times [2023-08-29 19:42:19,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:19,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434781525] [2023-08-29 19:42:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:19,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:19,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:19,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434781525] [2023-08-29 19:42:19,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434781525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:19,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:19,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:42:19,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101328489] [2023-08-29 19:42:19,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:19,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:42:19,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:19,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:42:19,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:42:19,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 351 [2023-08-29 19:42:19,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:19,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:19,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 351 [2023-08-29 19:42:19,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:19,831 INFO L130 PetriNetUnfolder]: 1340/2209 cut-off events. [2023-08-29 19:42:19,831 INFO L131 PetriNetUnfolder]: For 345/345 co-relation queries the response was YES. [2023-08-29 19:42:19,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4747 conditions, 2209 events. 1340/2209 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10364 event pairs, 277 based on Foata normal form. 0/1711 useless extension candidates. Maximal degree in co-relation 4742. Up to 1690 conditions per place. [2023-08-29 19:42:19,841 INFO L137 encePairwiseOnDemand]: 345/351 looper letters, 91 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2023-08-29 19:42:19,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 99 transitions, 449 flow [2023-08-29 19:42:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:42:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:42:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 896 transitions. [2023-08-29 19:42:19,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105413105413106 [2023-08-29 19:42:19,844 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 896 transitions. [2023-08-29 19:42:19,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 896 transitions. [2023-08-29 19:42:19,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:19,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 896 transitions. [2023-08-29 19:42:19,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.2) internal successors, (896), 5 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:19,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:19,849 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:19,849 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 112 flow. Second operand 5 states and 896 transitions. [2023-08-29 19:42:19,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 99 transitions, 449 flow [2023-08-29 19:42:19,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 99 transitions, 433 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:19,853 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 157 flow [2023-08-29 19:42:19,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-29 19:42:19,853 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-29 19:42:19,854 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 157 flow [2023-08-29 19:42:19,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:19,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:19,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:42:19,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 19:42:19,855 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:19,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:19,855 INFO L85 PathProgramCache]: Analyzing trace with hash -279078098, now seen corresponding path program 1 times [2023-08-29 19:42:19,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:19,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053243041] [2023-08-29 19:42:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:19,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:19,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:19,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053243041] [2023-08-29 19:42:19,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053243041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:19,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:19,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:42:19,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078956525] [2023-08-29 19:42:19,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:19,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:42:19,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:19,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:42:19,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:42:20,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 351 [2023-08-29 19:42:20,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:20,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 351 [2023-08-29 19:42:20,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:20,310 INFO L130 PetriNetUnfolder]: 1527/2496 cut-off events. [2023-08-29 19:42:20,310 INFO L131 PetriNetUnfolder]: For 532/532 co-relation queries the response was YES. [2023-08-29 19:42:20,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5712 conditions, 2496 events. 1527/2496 cut-off events. For 532/532 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 12245 event pairs, 499 based on Foata normal form. 0/2144 useless extension candidates. Maximal degree in co-relation 5704. Up to 1668 conditions per place. [2023-08-29 19:42:20,322 INFO L137 encePairwiseOnDemand]: 345/351 looper letters, 88 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2023-08-29 19:42:20,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 97 transitions, 477 flow [2023-08-29 19:42:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:42:20,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:42:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 879 transitions. [2023-08-29 19:42:20,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5008547008547009 [2023-08-29 19:42:20,325 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 879 transitions. [2023-08-29 19:42:20,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 879 transitions. [2023-08-29 19:42:20,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:20,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 879 transitions. [2023-08-29 19:42:20,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,331 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,331 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 157 flow. Second operand 5 states and 879 transitions. [2023-08-29 19:42:20,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 97 transitions, 477 flow [2023-08-29 19:42:20,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 97 transitions, 477 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:42:20,334 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 200 flow [2023-08-29 19:42:20,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-08-29 19:42:20,335 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-29 19:42:20,335 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 200 flow [2023-08-29 19:42:20,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:20,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:20,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 19:42:20,336 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:20,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1980734071, now seen corresponding path program 1 times [2023-08-29 19:42:20,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:20,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958810794] [2023-08-29 19:42:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:20,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:20,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:20,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958810794] [2023-08-29 19:42:20,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958810794] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:20,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:20,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:42:20,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35567166] [2023-08-29 19:42:20,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:20,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:20,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:20,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:20,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:20,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 351 [2023-08-29 19:42:20,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:20,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 351 [2023-08-29 19:42:20,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:20,540 INFO L130 PetriNetUnfolder]: 1038/1713 cut-off events. [2023-08-29 19:42:20,541 INFO L131 PetriNetUnfolder]: For 676/676 co-relation queries the response was YES. [2023-08-29 19:42:20,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4048 conditions, 1713 events. 1038/1713 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7487 event pairs, 470 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 4037. Up to 1417 conditions per place. [2023-08-29 19:42:20,549 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 58 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-29 19:42:20,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 312 flow [2023-08-29 19:42:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2023-08-29 19:42:20,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223171889838556 [2023-08-29 19:42:20,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2023-08-29 19:42:20,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2023-08-29 19:42:20,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:20,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2023-08-29 19:42:20,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,555 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 200 flow. Second operand 3 states and 550 transitions. [2023-08-29 19:42:20,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 312 flow [2023-08-29 19:42:20,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 292 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-29 19:42:20,559 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 149 flow [2023-08-29 19:42:20,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-08-29 19:42:20,560 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2023-08-29 19:42:20,560 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 149 flow [2023-08-29 19:42:20,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:20,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:20,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:42:20,561 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:20,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:20,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2112403101, now seen corresponding path program 1 times [2023-08-29 19:42:20,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:20,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003660598] [2023-08-29 19:42:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:20,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:20,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:20,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003660598] [2023-08-29 19:42:20,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003660598] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:20,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:20,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:42:20,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523238715] [2023-08-29 19:42:20,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:20,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:20,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:20,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:20,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:20,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 351 [2023-08-29 19:42:20,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:20,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 351 [2023-08-29 19:42:20,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:20,773 INFO L130 PetriNetUnfolder]: 1100/1809 cut-off events. [2023-08-29 19:42:20,773 INFO L131 PetriNetUnfolder]: For 440/440 co-relation queries the response was YES. [2023-08-29 19:42:20,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4246 conditions, 1809 events. 1100/1809 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 8048 event pairs, 782 based on Foata normal form. 60/1705 useless extension candidates. Maximal degree in co-relation 4237. Up to 1632 conditions per place. [2023-08-29 19:42:20,782 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 62 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-08-29 19:42:20,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 68 transitions, 340 flow [2023-08-29 19:42:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:20,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-08-29 19:42:20,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194681861348528 [2023-08-29 19:42:20,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-08-29 19:42:20,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-08-29 19:42:20,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:20,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-08-29 19:42:20,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,789 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,789 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 149 flow. Second operand 3 states and 547 transitions. [2023-08-29 19:42:20,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 68 transitions, 340 flow [2023-08-29 19:42:20,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:42:20,792 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 170 flow [2023-08-29 19:42:20,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-08-29 19:42:20,793 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-29 19:42:20,793 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 170 flow [2023-08-29 19:42:20,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:20,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:20,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 19:42:20,794 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:20,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:20,794 INFO L85 PathProgramCache]: Analyzing trace with hash -473821575, now seen corresponding path program 1 times [2023-08-29 19:42:20,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:20,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650462432] [2023-08-29 19:42:20,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:20,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:20,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:20,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650462432] [2023-08-29 19:42:20,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650462432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:20,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:20,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:42:20,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110610211] [2023-08-29 19:42:20,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:20,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:20,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:20,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:20,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:20,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 351 [2023-08-29 19:42:20,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:20,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:20,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 351 [2023-08-29 19:42:20,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:21,014 INFO L130 PetriNetUnfolder]: 1152/1917 cut-off events. [2023-08-29 19:42:21,015 INFO L131 PetriNetUnfolder]: For 783/783 co-relation queries the response was YES. [2023-08-29 19:42:21,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4707 conditions, 1917 events. 1152/1917 cut-off events. For 783/783 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9386 event pairs, 495 based on Foata normal form. 12/1759 useless extension candidates. Maximal degree in co-relation 4697. Up to 1599 conditions per place. [2023-08-29 19:42:21,024 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 67 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-29 19:42:21,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 364 flow [2023-08-29 19:42:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:21,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2023-08-29 19:42:21,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251661918328585 [2023-08-29 19:42:21,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2023-08-29 19:42:21,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2023-08-29 19:42:21,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:21,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2023-08-29 19:42:21,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:21,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:21,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:21,030 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 170 flow. Second operand 3 states and 553 transitions. [2023-08-29 19:42:21,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 364 flow [2023-08-29 19:42:21,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 357 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:21,035 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 172 flow [2023-08-29 19:42:21,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-08-29 19:42:21,036 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-29 19:42:21,036 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 172 flow [2023-08-29 19:42:21,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:21,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:21,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:21,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 19:42:21,037 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:21,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:21,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1409017203, now seen corresponding path program 1 times [2023-08-29 19:42:21,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:21,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015472586] [2023-08-29 19:42:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:21,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:21,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:21,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015472586] [2023-08-29 19:42:21,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015472586] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:42:21,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669505513] [2023-08-29 19:42:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:21,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:42:21,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:42:21,117 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:42:21,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 19:42:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:21,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 19:42:21,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:42:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:21,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:42:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:21,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669505513] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:42:21,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:42:21,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-29 19:42:21,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865816143] [2023-08-29 19:42:21,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:42:21,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 19:42:21,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:21,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 19:42:21,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-29 19:42:21,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 351 [2023-08-29 19:42:21,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 172 flow. Second operand has 10 states, 10 states have (on average 163.6) internal successors, (1636), 10 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:21,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:21,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 351 [2023-08-29 19:42:21,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:22,038 INFO L130 PetriNetUnfolder]: 2435/3960 cut-off events. [2023-08-29 19:42:22,039 INFO L131 PetriNetUnfolder]: For 1463/1463 co-relation queries the response was YES. [2023-08-29 19:42:22,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9942 conditions, 3960 events. 2435/3960 cut-off events. For 1463/1463 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 19784 event pairs, 378 based on Foata normal form. 60/3634 useless extension candidates. Maximal degree in co-relation 9931. Up to 1190 conditions per place. [2023-08-29 19:42:22,056 INFO L137 encePairwiseOnDemand]: 345/351 looper letters, 202 selfloop transitions, 23 changer transitions 0/225 dead transitions. [2023-08-29 19:42:22,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 225 transitions, 1115 flow [2023-08-29 19:42:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:42:22,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:42:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1818 transitions. [2023-08-29 19:42:22,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.517948717948718 [2023-08-29 19:42:22,061 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1818 transitions. [2023-08-29 19:42:22,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1818 transitions. [2023-08-29 19:42:22,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:22,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1818 transitions. [2023-08-29 19:42:22,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 181.8) internal successors, (1818), 10 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:22,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 351.0) internal successors, (3861), 11 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:22,071 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 351.0) internal successors, (3861), 11 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:22,071 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 172 flow. Second operand 10 states and 1818 transitions. [2023-08-29 19:42:22,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 225 transitions, 1115 flow [2023-08-29 19:42:22,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 225 transitions, 1111 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:42:22,079 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 339 flow [2023-08-29 19:42:22,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=339, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2023-08-29 19:42:22,080 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 15 predicate places. [2023-08-29 19:42:22,080 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 339 flow [2023-08-29 19:42:22,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.6) internal successors, (1636), 10 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:22,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:22,081 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:22,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 19:42:22,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-29 19:42:22,292 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:22,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:22,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1409018666, now seen corresponding path program 1 times [2023-08-29 19:42:22,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:22,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225175267] [2023-08-29 19:42:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:22,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:22,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:22,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225175267] [2023-08-29 19:42:22,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225175267] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:42:22,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766033794] [2023-08-29 19:42:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:22,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:42:22,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:42:22,630 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:42:22,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 19:42:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:22,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-29 19:42:22,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:42:22,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:42:22,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:42:22,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:42:22,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-29 19:42:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:22,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:42:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:23,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766033794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:42:23,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:42:23,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-29 19:42:23,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319727649] [2023-08-29 19:42:23,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:42:23,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 19:42:23,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:23,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 19:42:23,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-29 19:42:24,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 351 [2023-08-29 19:42:24,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 339 flow. Second operand has 21 states, 21 states have (on average 155.0) internal successors, (3255), 21 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:24,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:24,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 351 [2023-08-29 19:42:24,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:26,587 INFO L130 PetriNetUnfolder]: 3743/6076 cut-off events. [2023-08-29 19:42:26,588 INFO L131 PetriNetUnfolder]: For 4774/4774 co-relation queries the response was YES. [2023-08-29 19:42:26,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16623 conditions, 6076 events. 3743/6076 cut-off events. For 4774/4774 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 30295 event pairs, 949 based on Foata normal form. 84/5586 useless extension candidates. Maximal degree in co-relation 16608. Up to 3657 conditions per place. [2023-08-29 19:42:26,619 INFO L137 encePairwiseOnDemand]: 343/351 looper letters, 236 selfloop transitions, 27 changer transitions 0/263 dead transitions. [2023-08-29 19:42:26,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 263 transitions, 1483 flow [2023-08-29 19:42:26,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:42:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:42:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2375 transitions. [2023-08-29 19:42:26,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48331298331298334 [2023-08-29 19:42:26,626 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2375 transitions. [2023-08-29 19:42:26,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2375 transitions. [2023-08-29 19:42:26,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:26,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2375 transitions. [2023-08-29 19:42:26,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 169.64285714285714) internal successors, (2375), 14 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:26,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 351.0) internal successors, (5265), 15 states have internal predecessors, (5265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:26,640 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 351.0) internal successors, (5265), 15 states have internal predecessors, (5265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:26,640 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 339 flow. Second operand 14 states and 2375 transitions. [2023-08-29 19:42:26,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 263 transitions, 1483 flow [2023-08-29 19:42:26,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 263 transitions, 1451 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-29 19:42:26,659 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 605 flow [2023-08-29 19:42:26,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=605, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2023-08-29 19:42:26,661 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 37 predicate places. [2023-08-29 19:42:26,661 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 605 flow [2023-08-29 19:42:26,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 155.0) internal successors, (3255), 21 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:26,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:26,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:26,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 19:42:26,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-29 19:42:26,880 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:26,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:26,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1918706977, now seen corresponding path program 1 times [2023-08-29 19:42:26,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:26,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732396832] [2023-08-29 19:42:26,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:26,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:26,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:26,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732396832] [2023-08-29 19:42:26,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732396832] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:26,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:26,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:42:26,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39328100] [2023-08-29 19:42:26,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:26,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:26,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:26,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:26,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:26,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 351 [2023-08-29 19:42:26,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 605 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:26,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:26,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 351 [2023-08-29 19:42:26,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:27,180 INFO L130 PetriNetUnfolder]: 852/1615 cut-off events. [2023-08-29 19:42:27,181 INFO L131 PetriNetUnfolder]: For 1937/1937 co-relation queries the response was YES. [2023-08-29 19:42:27,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4548 conditions, 1615 events. 852/1615 cut-off events. For 1937/1937 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7069 event pairs, 117 based on Foata normal form. 94/1633 useless extension candidates. Maximal degree in co-relation 4523. Up to 1249 conditions per place. [2023-08-29 19:42:27,191 INFO L137 encePairwiseOnDemand]: 346/351 looper letters, 61 selfloop transitions, 8 changer transitions 0/74 dead transitions. [2023-08-29 19:42:27,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 74 transitions, 555 flow [2023-08-29 19:42:27,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2023-08-29 19:42:27,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042735042735043 [2023-08-29 19:42:27,194 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2023-08-29 19:42:27,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2023-08-29 19:42:27,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:27,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2023-08-29 19:42:27,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:27,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:27,197 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:27,197 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 605 flow. Second operand 3 states and 531 transitions. [2023-08-29 19:42:27,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 74 transitions, 555 flow [2023-08-29 19:42:27,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 529 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-29 19:42:27,204 INFO L231 Difference]: Finished difference. Result has 76 places, 65 transitions, 383 flow [2023-08-29 19:42:27,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=383, PETRI_PLACES=76, PETRI_TRANSITIONS=65} [2023-08-29 19:42:27,206 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 27 predicate places. [2023-08-29 19:42:27,206 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 65 transitions, 383 flow [2023-08-29 19:42:27,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:27,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:27,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:27,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:42:27,207 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:27,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:27,208 INFO L85 PathProgramCache]: Analyzing trace with hash -766914059, now seen corresponding path program 1 times [2023-08-29 19:42:27,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:27,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197987212] [2023-08-29 19:42:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:27,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:27,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:27,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197987212] [2023-08-29 19:42:27,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197987212] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:27,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:27,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:42:27,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58372295] [2023-08-29 19:42:27,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:27,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:42:27,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:27,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:42:27,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:42:27,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 351 [2023-08-29 19:42:27,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 65 transitions, 383 flow. Second operand has 7 states, 7 states have (on average 157.71428571428572) internal successors, (1104), 7 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:27,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:27,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 351 [2023-08-29 19:42:27,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:27,891 INFO L130 PetriNetUnfolder]: 933/1761 cut-off events. [2023-08-29 19:42:27,892 INFO L131 PetriNetUnfolder]: For 1216/1216 co-relation queries the response was YES. [2023-08-29 19:42:27,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5027 conditions, 1761 events. 933/1761 cut-off events. For 1216/1216 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7702 event pairs, 159 based on Foata normal form. 0/1755 useless extension candidates. Maximal degree in co-relation 5004. Up to 951 conditions per place. [2023-08-29 19:42:27,902 INFO L137 encePairwiseOnDemand]: 343/351 looper letters, 92 selfloop transitions, 9 changer transitions 0/106 dead transitions. [2023-08-29 19:42:27,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 106 transitions, 741 flow [2023-08-29 19:42:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 19:42:27,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 19:42:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1319 transitions. [2023-08-29 19:42:27,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46972934472934474 [2023-08-29 19:42:27,906 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1319 transitions. [2023-08-29 19:42:27,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1319 transitions. [2023-08-29 19:42:27,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:27,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1319 transitions. [2023-08-29 19:42:27,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 164.875) internal successors, (1319), 8 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:27,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 351.0) internal successors, (3159), 9 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:27,914 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 351.0) internal successors, (3159), 9 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:27,914 INFO L175 Difference]: Start difference. First operand has 76 places, 65 transitions, 383 flow. Second operand 8 states and 1319 transitions. [2023-08-29 19:42:27,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 106 transitions, 741 flow [2023-08-29 19:42:27,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 106 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:42:27,920 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 429 flow [2023-08-29 19:42:27,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=429, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2023-08-29 19:42:27,921 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 34 predicate places. [2023-08-29 19:42:27,921 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 429 flow [2023-08-29 19:42:27,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 157.71428571428572) internal successors, (1104), 7 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:27,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:27,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:27,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 19:42:27,922 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:27,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:27,923 INFO L85 PathProgramCache]: Analyzing trace with hash -546386250, now seen corresponding path program 1 times [2023-08-29 19:42:27,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:27,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310401324] [2023-08-29 19:42:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:27,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:28,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:28,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310401324] [2023-08-29 19:42:28,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310401324] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:28,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:28,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-29 19:42:28,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670351198] [2023-08-29 19:42:28,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:28,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 19:42:28,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:28,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 19:42:28,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-08-29 19:42:29,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 351 [2023-08-29 19:42:29,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 429 flow. Second operand has 12 states, 12 states have (on average 148.66666666666666) internal successors, (1784), 12 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:29,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:29,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 351 [2023-08-29 19:42:29,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:29,840 INFO L130 PetriNetUnfolder]: 1099/2019 cut-off events. [2023-08-29 19:42:29,840 INFO L131 PetriNetUnfolder]: For 1379/1379 co-relation queries the response was YES. [2023-08-29 19:42:29,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5845 conditions, 2019 events. 1099/2019 cut-off events. For 1379/1379 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 9026 event pairs, 277 based on Foata normal form. 0/1989 useless extension candidates. Maximal degree in co-relation 5819. Up to 1464 conditions per place. [2023-08-29 19:42:29,851 INFO L137 encePairwiseOnDemand]: 340/351 looper letters, 139 selfloop transitions, 13 changer transitions 0/152 dead transitions. [2023-08-29 19:42:29,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 152 transitions, 997 flow [2023-08-29 19:42:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 19:42:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 19:42:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1749 transitions. [2023-08-29 19:42:29,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452991452991453 [2023-08-29 19:42:29,857 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1749 transitions. [2023-08-29 19:42:29,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1749 transitions. [2023-08-29 19:42:29,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:29,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1749 transitions. [2023-08-29 19:42:29,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 159.0) internal successors, (1749), 11 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:29,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 351.0) internal successors, (4212), 12 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:29,867 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 351.0) internal successors, (4212), 12 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:29,867 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 429 flow. Second operand 11 states and 1749 transitions. [2023-08-29 19:42:29,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 152 transitions, 997 flow [2023-08-29 19:42:29,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 152 transitions, 992 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:42:29,875 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 511 flow [2023-08-29 19:42:29,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=511, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-08-29 19:42:29,875 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 45 predicate places. [2023-08-29 19:42:29,875 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 511 flow [2023-08-29 19:42:29,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 148.66666666666666) internal successors, (1784), 12 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:29,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:29,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:29,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 19:42:29,877 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:29,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1684855074, now seen corresponding path program 1 times [2023-08-29 19:42:29,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:29,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202479941] [2023-08-29 19:42:29,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:29,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:42:29,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:29,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202479941] [2023-08-29 19:42:29,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202479941] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:29,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:29,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:42:29,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109632857] [2023-08-29 19:42:29,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:29,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:42:29,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:29,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:42:29,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:42:29,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 351 [2023-08-29 19:42:29,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 511 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:29,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:29,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 351 [2023-08-29 19:42:29,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:30,191 INFO L130 PetriNetUnfolder]: 1302/2468 cut-off events. [2023-08-29 19:42:30,192 INFO L131 PetriNetUnfolder]: For 2564/2564 co-relation queries the response was YES. [2023-08-29 19:42:30,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7439 conditions, 2468 events. 1302/2468 cut-off events. For 2564/2564 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 12525 event pairs, 812 based on Foata normal form. 72/2492 useless extension candidates. Maximal degree in co-relation 7409. Up to 1878 conditions per place. [2023-08-29 19:42:30,209 INFO L137 encePairwiseOnDemand]: 347/351 looper letters, 111 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2023-08-29 19:42:30,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 119 transitions, 1020 flow [2023-08-29 19:42:30,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:42:30,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:42:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2023-08-29 19:42:30,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261158594491928 [2023-08-29 19:42:30,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2023-08-29 19:42:30,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2023-08-29 19:42:30,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:30,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2023-08-29 19:42:30,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:30,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:30,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:30,216 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 511 flow. Second operand 3 states and 554 transitions. [2023-08-29 19:42:30,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 119 transitions, 1020 flow [2023-08-29 19:42:30,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 119 transitions, 995 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-29 19:42:30,227 INFO L231 Difference]: Finished difference. Result has 92 places, 77 transitions, 513 flow [2023-08-29 19:42:30,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=513, PETRI_PLACES=92, PETRI_TRANSITIONS=77} [2023-08-29 19:42:30,227 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 43 predicate places. [2023-08-29 19:42:30,227 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 77 transitions, 513 flow [2023-08-29 19:42:30,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:30,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:30,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:30,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 19:42:30,228 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:30,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash -154361138, now seen corresponding path program 1 times [2023-08-29 19:42:30,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:30,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719688995] [2023-08-29 19:42:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:30,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:30,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:30,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719688995] [2023-08-29 19:42:30,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719688995] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:30,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:30,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:42:30,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878577613] [2023-08-29 19:42:30,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:30,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:42:30,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:30,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:42:30,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:42:32,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 351 [2023-08-29 19:42:32,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 77 transitions, 513 flow. Second operand has 15 states, 15 states have (on average 138.46666666666667) internal successors, (2077), 15 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:32,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:32,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 351 [2023-08-29 19:42:32,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:33,217 INFO L130 PetriNetUnfolder]: 1633/3040 cut-off events. [2023-08-29 19:42:33,217 INFO L131 PetriNetUnfolder]: For 2940/2940 co-relation queries the response was YES. [2023-08-29 19:42:33,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9652 conditions, 3040 events. 1633/3040 cut-off events. For 2940/2940 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 15503 event pairs, 462 based on Foata normal form. 12/3052 useless extension candidates. Maximal degree in co-relation 9621. Up to 2369 conditions per place. [2023-08-29 19:42:33,236 INFO L137 encePairwiseOnDemand]: 334/351 looper letters, 159 selfloop transitions, 30 changer transitions 0/189 dead transitions. [2023-08-29 19:42:33,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 189 transitions, 1337 flow [2023-08-29 19:42:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-29 19:42:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-29 19:42:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2617 transitions. [2023-08-29 19:42:33,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142133586578031 [2023-08-29 19:42:33,243 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2617 transitions. [2023-08-29 19:42:33,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2617 transitions. [2023-08-29 19:42:33,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:33,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2617 transitions. [2023-08-29 19:42:33,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 145.38888888888889) internal successors, (2617), 18 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 351.0) internal successors, (6669), 19 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,257 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 351.0) internal successors, (6669), 19 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,257 INFO L175 Difference]: Start difference. First operand has 92 places, 77 transitions, 513 flow. Second operand 18 states and 2617 transitions. [2023-08-29 19:42:33,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 189 transitions, 1337 flow [2023-08-29 19:42:33,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 189 transitions, 1324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:42:33,270 INFO L231 Difference]: Finished difference. Result has 117 places, 103 transitions, 762 flow [2023-08-29 19:42:33,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=762, PETRI_PLACES=117, PETRI_TRANSITIONS=103} [2023-08-29 19:42:33,271 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 68 predicate places. [2023-08-29 19:42:33,271 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 103 transitions, 762 flow [2023-08-29 19:42:33,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 138.46666666666667) internal successors, (2077), 15 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:33,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:33,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:33,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 19:42:33,272 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:33,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:33,272 INFO L85 PathProgramCache]: Analyzing trace with hash -72213900, now seen corresponding path program 2 times [2023-08-29 19:42:33,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:33,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770047047] [2023-08-29 19:42:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:33,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:33,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:33,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770047047] [2023-08-29 19:42:33,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770047047] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:33,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:33,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:42:33,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885804365] [2023-08-29 19:42:33,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:33,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:42:33,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:33,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:42:33,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:42:35,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 351 [2023-08-29 19:42:35,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 103 transitions, 762 flow. Second operand has 16 states, 16 states have (on average 136.375) internal successors, (2182), 16 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:35,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:35,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 351 [2023-08-29 19:42:35,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:36,624 INFO L130 PetriNetUnfolder]: 1890/3518 cut-off events. [2023-08-29 19:42:36,624 INFO L131 PetriNetUnfolder]: For 4068/4068 co-relation queries the response was YES. [2023-08-29 19:42:36,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11964 conditions, 3518 events. 1890/3518 cut-off events. For 4068/4068 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 18684 event pairs, 547 based on Foata normal form. 12/3530 useless extension candidates. Maximal degree in co-relation 11924. Up to 2389 conditions per place. [2023-08-29 19:42:36,648 INFO L137 encePairwiseOnDemand]: 334/351 looper letters, 158 selfloop transitions, 38 changer transitions 0/196 dead transitions. [2023-08-29 19:42:36,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 196 transitions, 1546 flow [2023-08-29 19:42:36,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:42:36,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:42:36,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2030 transitions. [2023-08-29 19:42:36,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131054131054131 [2023-08-29 19:42:36,654 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2030 transitions. [2023-08-29 19:42:36,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2030 transitions. [2023-08-29 19:42:36,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:36,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2030 transitions. [2023-08-29 19:42:36,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 145.0) internal successors, (2030), 14 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:36,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 351.0) internal successors, (5265), 15 states have internal predecessors, (5265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:36,663 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 351.0) internal successors, (5265), 15 states have internal predecessors, (5265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:36,663 INFO L175 Difference]: Start difference. First operand has 117 places, 103 transitions, 762 flow. Second operand 14 states and 2030 transitions. [2023-08-29 19:42:36,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 196 transitions, 1546 flow [2023-08-29 19:42:36,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 196 transitions, 1539 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:42:36,685 INFO L231 Difference]: Finished difference. Result has 135 places, 115 transitions, 990 flow [2023-08-29 19:42:36,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=990, PETRI_PLACES=135, PETRI_TRANSITIONS=115} [2023-08-29 19:42:36,686 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 86 predicate places. [2023-08-29 19:42:36,686 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 115 transitions, 990 flow [2023-08-29 19:42:36,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 136.375) internal successors, (2182), 16 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:36,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:36,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:36,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 19:42:36,687 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:36,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:36,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1285038460, now seen corresponding path program 3 times [2023-08-29 19:42:36,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:36,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373080455] [2023-08-29 19:42:36,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:36,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:37,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:37,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373080455] [2023-08-29 19:42:37,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373080455] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:37,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:37,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:42:37,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354428402] [2023-08-29 19:42:37,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:37,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:42:37,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:37,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:42:37,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:42:38,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 351 [2023-08-29 19:42:38,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 115 transitions, 990 flow. Second operand has 16 states, 16 states have (on average 136.375) internal successors, (2182), 16 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:38,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:38,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 351 [2023-08-29 19:42:38,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:39,990 INFO L130 PetriNetUnfolder]: 1878/3494 cut-off events. [2023-08-29 19:42:39,991 INFO L131 PetriNetUnfolder]: For 5394/5394 co-relation queries the response was YES. [2023-08-29 19:42:40,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12665 conditions, 3494 events. 1878/3494 cut-off events. For 5394/5394 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 18482 event pairs, 499 based on Foata normal form. 12/3506 useless extension candidates. Maximal degree in co-relation 12617. Up to 1905 conditions per place. [2023-08-29 19:42:40,020 INFO L137 encePairwiseOnDemand]: 334/351 looper letters, 148 selfloop transitions, 50 changer transitions 0/198 dead transitions. [2023-08-29 19:42:40,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 198 transitions, 1704 flow [2023-08-29 19:42:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 19:42:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 19:42:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2165 transitions. [2023-08-29 19:42:40,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41120607787274455 [2023-08-29 19:42:40,025 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2165 transitions. [2023-08-29 19:42:40,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2165 transitions. [2023-08-29 19:42:40,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:40,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2165 transitions. [2023-08-29 19:42:40,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 144.33333333333334) internal successors, (2165), 15 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:40,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 351.0) internal successors, (5616), 16 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:40,037 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 351.0) internal successors, (5616), 16 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:40,037 INFO L175 Difference]: Start difference. First operand has 135 places, 115 transitions, 990 flow. Second operand 15 states and 2165 transitions. [2023-08-29 19:42:40,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 198 transitions, 1704 flow [2023-08-29 19:42:40,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 198 transitions, 1655 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-29 19:42:40,069 INFO L231 Difference]: Finished difference. Result has 148 places, 122 transitions, 1147 flow [2023-08-29 19:42:40,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=949, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1147, PETRI_PLACES=148, PETRI_TRANSITIONS=122} [2023-08-29 19:42:40,070 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 99 predicate places. [2023-08-29 19:42:40,070 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 122 transitions, 1147 flow [2023-08-29 19:42:40,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 136.375) internal successors, (2182), 16 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:40,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:40,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:40,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 19:42:40,072 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:40,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:40,072 INFO L85 PathProgramCache]: Analyzing trace with hash -784371860, now seen corresponding path program 1 times [2023-08-29 19:42:40,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:40,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492474607] [2023-08-29 19:42:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:40,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:42:40,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:40,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492474607] [2023-08-29 19:42:40,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492474607] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:42:40,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870663521] [2023-08-29 19:42:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:40,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:42:40,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:42:40,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:42:40,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 19:42:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:40,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:42:40,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:42:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:42:40,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:42:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:42:40,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870663521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:42:40,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:42:40,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 19:42:40,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815274897] [2023-08-29 19:42:40,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:42:40,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:42:40,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:40,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:42:40,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:42:40,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 351 [2023-08-29 19:42:40,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 122 transitions, 1147 flow. Second operand has 7 states, 7 states have (on average 166.57142857142858) internal successors, (1166), 7 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:40,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:40,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 351 [2023-08-29 19:42:40,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:41,259 INFO L130 PetriNetUnfolder]: 3617/6949 cut-off events. [2023-08-29 19:42:41,259 INFO L131 PetriNetUnfolder]: For 13751/13753 co-relation queries the response was YES. [2023-08-29 19:42:41,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26016 conditions, 6949 events. 3617/6949 cut-off events. For 13751/13753 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 45212 event pairs, 729 based on Foata normal form. 758/7706 useless extension candidates. Maximal degree in co-relation 25963. Up to 1593 conditions per place. [2023-08-29 19:42:41,301 INFO L137 encePairwiseOnDemand]: 346/351 looper letters, 375 selfloop transitions, 22 changer transitions 0/403 dead transitions. [2023-08-29 19:42:41,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 403 transitions, 4640 flow [2023-08-29 19:42:41,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:42:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:42:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1111 transitions. [2023-08-29 19:42:41,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275403608736942 [2023-08-29 19:42:41,303 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1111 transitions. [2023-08-29 19:42:41,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1111 transitions. [2023-08-29 19:42:41,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:41,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1111 transitions. [2023-08-29 19:42:41,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:41,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:41,308 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:41,308 INFO L175 Difference]: Start difference. First operand has 148 places, 122 transitions, 1147 flow. Second operand 6 states and 1111 transitions. [2023-08-29 19:42:41,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 403 transitions, 4640 flow [2023-08-29 19:42:41,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 403 transitions, 4442 flow, removed 21 selfloop flow, removed 9 redundant places. [2023-08-29 19:42:41,389 INFO L231 Difference]: Finished difference. Result has 148 places, 133 transitions, 1291 flow [2023-08-29 19:42:41,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1291, PETRI_PLACES=148, PETRI_TRANSITIONS=133} [2023-08-29 19:42:41,390 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 99 predicate places. [2023-08-29 19:42:41,390 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 133 transitions, 1291 flow [2023-08-29 19:42:41,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.57142857142858) internal successors, (1166), 7 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:41,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:41,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:41,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-29 19:42:41,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:42:41,597 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:41,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:41,597 INFO L85 PathProgramCache]: Analyzing trace with hash 586092581, now seen corresponding path program 1 times [2023-08-29 19:42:41,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:41,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646765143] [2023-08-29 19:42:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:41,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:41,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:41,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646765143] [2023-08-29 19:42:41,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646765143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:42:41,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346547036] [2023-08-29 19:42:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:41,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:42:41,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:42:41,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:42:41,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 19:42:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:41,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-29 19:42:41,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:42:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:42,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:42:42,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:42:42,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-08-29 19:42:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:42,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346547036] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:42:42,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:42:42,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-08-29 19:42:42,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960535565] [2023-08-29 19:42:42,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:42:42,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-29 19:42:42,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:42,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-29 19:42:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-08-29 19:42:45,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 351 [2023-08-29 19:42:45,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 133 transitions, 1291 flow. Second operand has 29 states, 29 states have (on average 146.44827586206895) internal successors, (4247), 29 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:45,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:42:45,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 351 [2023-08-29 19:42:45,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:42:49,047 INFO L130 PetriNetUnfolder]: 4889/9403 cut-off events. [2023-08-29 19:42:49,047 INFO L131 PetriNetUnfolder]: For 21134/21134 co-relation queries the response was YES. [2023-08-29 19:42:49,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36011 conditions, 9403 events. 4889/9403 cut-off events. For 21134/21134 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 62479 event pairs, 747 based on Foata normal form. 260/9663 useless extension candidates. Maximal degree in co-relation 35954. Up to 1713 conditions per place. [2023-08-29 19:42:49,109 INFO L137 encePairwiseOnDemand]: 337/351 looper letters, 338 selfloop transitions, 103 changer transitions 0/441 dead transitions. [2023-08-29 19:42:49,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 441 transitions, 3951 flow [2023-08-29 19:42:49,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-29 19:42:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-29 19:42:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5941 transitions. [2023-08-29 19:42:49,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43399810066476735 [2023-08-29 19:42:49,118 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5941 transitions. [2023-08-29 19:42:49,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5941 transitions. [2023-08-29 19:42:49,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:42:49,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5941 transitions. [2023-08-29 19:42:49,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 152.33333333333334) internal successors, (5941), 39 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 351.0) internal successors, (14040), 40 states have internal predecessors, (14040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,144 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 351.0) internal successors, (14040), 40 states have internal predecessors, (14040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,144 INFO L175 Difference]: Start difference. First operand has 148 places, 133 transitions, 1291 flow. Second operand 39 states and 5941 transitions. [2023-08-29 19:42:49,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 441 transitions, 3951 flow [2023-08-29 19:42:49,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 441 transitions, 3831 flow, removed 50 selfloop flow, removed 1 redundant places. [2023-08-29 19:42:49,253 INFO L231 Difference]: Finished difference. Result has 199 places, 190 transitions, 2028 flow [2023-08-29 19:42:49,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2028, PETRI_PLACES=199, PETRI_TRANSITIONS=190} [2023-08-29 19:42:49,254 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 150 predicate places. [2023-08-29 19:42:49,254 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 190 transitions, 2028 flow [2023-08-29 19:42:49,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 146.44827586206895) internal successors, (4247), 29 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:42:49,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:42:49,255 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:49,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-29 19:42:49,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:42:49,461 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:42:49,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:42:49,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1979566986, now seen corresponding path program 1 times [2023-08-29 19:42:49,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:42:49,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297205409] [2023-08-29 19:42:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:42:49,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:42:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:42:49,496 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:42:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:42:49,544 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 19:42:49,544 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:42:49,545 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-08-29 19:42:49,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-29 19:42:49,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-29 19:42:49,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-29 19:42:49,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-29 19:42:49,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-08-29 19:42:49,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-29 19:42:49,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-29 19:42:49,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-29 19:42:49,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-08-29 19:42:49,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-08-29 19:42:49,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-08-29 19:42:49,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-29 19:42:49,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-29 19:42:49,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-08-29 19:42:49,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2023-08-29 19:42:49,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-29 19:42:49,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-29 19:42:49,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-29 19:42:49,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-29 19:42:49,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-08-29 19:42:49,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-29 19:42:49,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-29 19:42:49,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 19:42:49,551 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:42:49,556 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 19:42:49,556 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 19:42:49,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 07:42:49 BasicIcfg [2023-08-29 19:42:49,618 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 19:42:49,619 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 19:42:49,619 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 19:42:49,619 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 19:42:49,620 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:42:12" (3/4) ... [2023-08-29 19:42:49,622 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-29 19:42:49,622 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 19:42:49,622 INFO L158 Benchmark]: Toolchain (without parser) took 38610.90ms. Allocated memory was 83.9MB in the beginning and 853.5MB in the end (delta: 769.7MB). Free memory was 61.4MB in the beginning and 459.6MB in the end (delta: -398.2MB). Peak memory consumption was 370.8MB. Max. memory is 16.1GB. [2023-08-29 19:42:49,623 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 62.9MB. Free memory was 41.0MB in the beginning and 41.0MB in the end (delta: 55.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:42:49,623 INFO L158 Benchmark]: CACSL2BoogieTranslator took 558.65ms. Allocated memory is still 83.9MB. Free memory was 61.4MB in the beginning and 51.5MB in the end (delta: 9.8MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. [2023-08-29 19:42:49,623 INFO L158 Benchmark]: Boogie Procedure Inliner took 72.61ms. Allocated memory is still 83.9MB. Free memory was 51.5MB in the beginning and 48.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 19:42:49,624 INFO L158 Benchmark]: Boogie Preprocessor took 45.61ms. Allocated memory is still 83.9MB. Free memory was 48.7MB in the beginning and 47.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 19:42:49,624 INFO L158 Benchmark]: RCFGBuilder took 576.11ms. Allocated memory is still 83.9MB. Free memory was 47.0MB in the beginning and 56.4MB in the end (delta: -9.4MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. [2023-08-29 19:42:49,624 INFO L158 Benchmark]: TraceAbstraction took 37347.92ms. Allocated memory was 83.9MB in the beginning and 853.5MB in the end (delta: 769.7MB). Free memory was 55.6MB in the beginning and 459.6MB in the end (delta: -404.0MB). Peak memory consumption was 366.3MB. Max. memory is 16.1GB. [2023-08-29 19:42:49,624 INFO L158 Benchmark]: Witness Printer took 3.12ms. Allocated memory is still 853.5MB. Free memory is still 459.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:42:49,626 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 62.9MB. Free memory was 41.0MB in the beginning and 41.0MB in the end (delta: 55.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 558.65ms. Allocated memory is still 83.9MB. Free memory was 61.4MB in the beginning and 51.5MB in the end (delta: 9.8MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 72.61ms. Allocated memory is still 83.9MB. Free memory was 51.5MB in the beginning and 48.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.61ms. Allocated memory is still 83.9MB. Free memory was 48.7MB in the beginning and 47.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 576.11ms. Allocated memory is still 83.9MB. Free memory was 47.0MB in the beginning and 56.4MB in the end (delta: -9.4MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. * TraceAbstraction took 37347.92ms. Allocated memory was 83.9MB in the beginning and 853.5MB in the end (delta: 769.7MB). Free memory was 55.6MB in the beginning and 459.6MB in the end (delta: -404.0MB). Peak memory consumption was 366.3MB. Max. memory is 16.1GB. * Witness Printer took 3.12ms. Allocated memory is still 853.5MB. Free memory is still 459.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.5s, 169 PlacesBefore, 49 PlacesAfterwards, 172 TransitionsBefore, 47 TransitionsAfterwards, 8718 CoEnabledTransitionPairs, 6 FixpointIterations, 45 TrivialSequentialCompositions, 101 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 22 ConcurrentYvCompositions, 5 ChoiceCompositions, 173 TotalNumberOfCompositions, 13531 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 10151, independent: 9934, independent conditional: 0, independent unconditional: 9934, dependent: 217, dependent conditional: 0, dependent unconditional: 217, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5010, independent: 4954, independent conditional: 0, independent unconditional: 4954, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 10151, independent: 4980, independent conditional: 0, independent unconditional: 4980, dependent: 161, dependent conditional: 0, dependent unconditional: 161, unknown: 5010, unknown conditional: 0, unknown unconditional: 5010] , Statistics on independence cache: Total cache size (in pairs): 316, Positive cache size: 296, Positive conditional cache size: 0, Positive unconditional cache size: 296, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 941. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={6:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=13, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={6:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=14, top=0] [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=1, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=1, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=1, arr={3:0}, flag=1, m={4:0}, top=1] [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 274 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 37.1s, OverallIterations: 23, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 25.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7077 SdHoareTripleChecker+Valid, 15.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6183 mSDsluCounter, 9683 SdHoareTripleChecker+Invalid, 12.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9388 mSDsCounter, 178 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34362 IncrementalHoareTripleChecker+Invalid, 34540 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 178 mSolverCounterUnsat, 295 mSDtfsCounter, 34362 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 354 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2028occurred in iteration=22, InterpolantAutomatonStates: 177, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 393 NumberOfCodeBlocks, 393 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 414 ConstructedInterpolants, 0 QuantifiedInterpolants, 4036 SizeOfPredicates, 22 NumberOfNonLiveVariables, 921 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 30 InterpolantComputations, 18 PerfectInterpolantSequences, 9/34 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-29 19:42:49,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/stack-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 19:42:51,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:42:51,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:42:51,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:42:51,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:42:51,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:42:51,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:42:51,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:42:51,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:42:51,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:42:51,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:42:51,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:42:51,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:42:51,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:42:51,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:42:51,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:42:51,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:42:51,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:42:51,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:42:51,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:42:51,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:42:51,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:42:51,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:42:51,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:42:51,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:42:51,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:42:51,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:42:51,696 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:42:51,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:42:51,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:42:51,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:42:51,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:42:51,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:42:51,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:42:51,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:42:51,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:42:51,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:42:51,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:42:51,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:42:51,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:42:51,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:42:51,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 19:42:51,734 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:42:51,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:42:51,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:42:51,736 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:42:51,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:42:51,737 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:42:51,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:42:51,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:42:51,738 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:42:51,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:42:51,739 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:42:51,740 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:42:51,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:42:51,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:42:51,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:42:51,741 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:42:51,741 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:42:51,741 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:42:51,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:42:51,741 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:42:51,742 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 19:42:51,742 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 19:42:51,742 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:42:51,742 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:42:51,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:42:51,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:42:51,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:42:51,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:42:51,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:42:51,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:42:51,744 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 19:42:51,744 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 19:42:51,745 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:42:51,745 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:42:51,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:42:51,745 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 19:42:51,745 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:42:51,746 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:42:52,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:42:52,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:42:52,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:42:52,100 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:42:52,100 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:42:52,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-2.i [2023-08-29 19:42:53,383 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:42:53,722 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:42:53,723 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i [2023-08-29 19:42:53,739 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd24b5595/bfa03d015543480c9456df6564d6dc45/FLAG54d46fce9 [2023-08-29 19:42:53,751 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd24b5595/bfa03d015543480c9456df6564d6dc45 [2023-08-29 19:42:53,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:42:53,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:42:53,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:42:53,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:42:53,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:42:53,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:42:53" (1/1) ... [2023-08-29 19:42:53,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bdb150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:53, skipping insertion in model container [2023-08-29 19:42:53,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:42:53" (1/1) ... [2023-08-29 19:42:53,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:42:53,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:42:54,261 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/stack-2.i[41520,41533] [2023-08-29 19:42:54,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:42:54,304 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:42:54,329 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/stack-2.i[41520,41533] [2023-08-29 19:42:54,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:42:54,404 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:42:54,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:54 WrapperNode [2023-08-29 19:42:54,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:42:54,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:42:54,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:42:54,406 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:42:54,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:54" (1/1) ... [2023-08-29 19:42:54,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:54" (1/1) ... [2023-08-29 19:42:54,447 INFO L138 Inliner]: procedures = 281, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 156 [2023-08-29 19:42:54,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:42:54,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:42:54,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:42:54,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:42:54,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:54" (1/1) ... [2023-08-29 19:42:54,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:54" (1/1) ... [2023-08-29 19:42:54,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:54" (1/1) ... [2023-08-29 19:42:54,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:54" (1/1) ... [2023-08-29 19:42:54,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:54" (1/1) ... [2023-08-29 19:42:54,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:54" (1/1) ... [2023-08-29 19:42:54,479 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:54" (1/1) ... [2023-08-29 19:42:54,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:54" (1/1) ... [2023-08-29 19:42:54,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:42:54,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:42:54,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:42:54,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:42:54,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:54" (1/1) ... [2023-08-29 19:42:54,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:42:54,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:42:54,526 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 19:42:54,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 19:42:54,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 19:42:54,571 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-29 19:42:54,571 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-29 19:42:54,571 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-29 19:42:54,571 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-29 19:42:54,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:42:54,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:42:54,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 19:42:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 19:42:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2023-08-29 19:42:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 19:42:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:42:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:42:54,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:42:54,575 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 19:42:54,757 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:42:54,759 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:42:55,124 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:42:55,131 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:42:55,131 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 19:42:55,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:42:55 BoogieIcfgContainer [2023-08-29 19:42:55,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:42:55,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:42:55,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:42:55,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:42:55,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:42:53" (1/3) ... [2023-08-29 19:42:55,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7267c2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:42:55, skipping insertion in model container [2023-08-29 19:42:55,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:42:54" (2/3) ... [2023-08-29 19:42:55,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7267c2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:42:55, skipping insertion in model container [2023-08-29 19:42:55,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:42:55" (3/3) ... [2023-08-29 19:42:55,142 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-08-29 19:42:55,157 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:42:55,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-29 19:42:55,157 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:42:55,288 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 19:42:55,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 174 transitions, 364 flow [2023-08-29 19:42:55,415 INFO L130 PetriNetUnfolder]: 10/172 cut-off events. [2023-08-29 19:42:55,416 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:42:55,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 10/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 423 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-08-29 19:42:55,423 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 174 transitions, 364 flow [2023-08-29 19:42:55,432 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 168 transitions, 348 flow [2023-08-29 19:42:55,437 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:42:55,449 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 168 transitions, 348 flow [2023-08-29 19:42:55,451 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 168 transitions, 348 flow [2023-08-29 19:42:55,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 168 transitions, 348 flow [2023-08-29 19:42:55,505 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2023-08-29 19:42:55,505 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:42:55,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 422 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-08-29 19:42:55,511 INFO L119 LiptonReduction]: Number of co-enabled transitions 8060 [2023-08-29 19:43:04,295 INFO L134 LiptonReduction]: Checked pairs total: 12825 [2023-08-29 19:43:04,295 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-29 19:43:04,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:43:04,312 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;@7f31ca1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:43:04,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-29 19:43:04,314 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 19:43:04,314 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:43:04,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:04,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:43:04,315 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:04,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:04,320 INFO L85 PathProgramCache]: Analyzing trace with hash 707, now seen corresponding path program 1 times [2023-08-29 19:43:04,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:04,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022249340] [2023-08-29 19:43:04,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:04,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:04,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:04,334 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:04,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 19:43:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:04,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2023-08-29 19:43:04,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:04,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:04,400 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:04,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022249340] [2023-08-29 19:43:04,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022249340] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:04,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:04,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:43:04,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569879858] [2023-08-29 19:43:04,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:04,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:43:04,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:04,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:43:04,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:43:04,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 342 [2023-08-29 19:43:04,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:04,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:04,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 342 [2023-08-29 19:43:04,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:04,835 INFO L130 PetriNetUnfolder]: 1445/2252 cut-off events. [2023-08-29 19:43:04,836 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 19:43:04,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 2252 events. 1445/2252 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10541 event pairs, 1169 based on Foata normal form. 0/1244 useless extension candidates. Maximal degree in co-relation 4252. Up to 2225 conditions per place. [2023-08-29 19:43:04,852 INFO L137 encePairwiseOnDemand]: 340/342 looper letters, 44 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-29 19:43:04,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 190 flow [2023-08-29 19:43:04,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:43:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:43:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 372 transitions. [2023-08-29 19:43:04,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2023-08-29 19:43:04,872 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 372 transitions. [2023-08-29 19:43:04,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 372 transitions. [2023-08-29 19:43:04,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:04,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 372 transitions. [2023-08-29 19:43:04,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 186.0) internal successors, (372), 2 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:04,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:04,887 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:04,889 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 372 transitions. [2023-08-29 19:43:04,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 190 flow [2023-08-29 19:43:04,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:43:04,896 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-29 19:43:04,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-29 19:43:04,901 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-29 19:43:04,904 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-29 19:43:04,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:04,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:04,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:43:04,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:05,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:05,114 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:05,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:05,114 INFO L85 PathProgramCache]: Analyzing trace with hash 694736, now seen corresponding path program 1 times [2023-08-29 19:43:05,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:05,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711447611] [2023-08-29 19:43:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:05,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:05,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:05,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:05,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 19:43:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:05,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 19:43:05,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:05,270 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:43:05,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-29 19:43:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:05,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:05,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:05,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711447611] [2023-08-29 19:43:05,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711447611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:05,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:05,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:43:05,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789899753] [2023-08-29 19:43:05,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:05,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:05,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:05,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:05,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:05,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 342 [2023-08-29 19:43:05,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:05,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:05,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 342 [2023-08-29 19:43:05,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:05,596 INFO L130 PetriNetUnfolder]: 1416/2196 cut-off events. [2023-08-29 19:43:05,596 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:05,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4381 conditions, 2196 events. 1416/2196 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10203 event pairs, 1145 based on Foata normal form. 0/1225 useless extension candidates. Maximal degree in co-relation 4378. Up to 2168 conditions per place. [2023-08-29 19:43:05,606 INFO L137 encePairwiseOnDemand]: 338/342 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-29 19:43:05,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 174 flow [2023-08-29 19:43:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-29 19:43:05,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048732943469786 [2023-08-29 19:43:05,610 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-29 19:43:05,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-29 19:43:05,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:05,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-29 19:43:05,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:05,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:05,616 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:05,616 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 518 transitions. [2023-08-29 19:43:05,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 174 flow [2023-08-29 19:43:05,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:43:05,618 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-08-29 19:43:05,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-29 19:43:05,620 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-29 19:43:05,620 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-08-29 19:43:05,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:05,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:05,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:43:05,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:05,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:05,831 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:05,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:05,834 INFO L85 PathProgramCache]: Analyzing trace with hash 694735, now seen corresponding path program 1 times [2023-08-29 19:43:05,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:05,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194298550] [2023-08-29 19:43:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:05,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:05,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:05,840 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:05,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 19:43:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:05,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:43:05,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:05,923 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-29 19:43:05,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 19 [2023-08-29 19:43:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:05,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:05,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:05,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194298550] [2023-08-29 19:43:05,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194298550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:05,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:05,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:43:05,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167030255] [2023-08-29 19:43:05,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:05,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:05,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:05,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:05,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:05,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 342 [2023-08-29 19:43:05,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:05,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:05,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 342 [2023-08-29 19:43:05,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:06,180 INFO L130 PetriNetUnfolder]: 1387/2140 cut-off events. [2023-08-29 19:43:06,180 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:06,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4273 conditions, 2140 events. 1387/2140 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9853 event pairs, 1121 based on Foata normal form. 0/1206 useless extension candidates. Maximal degree in co-relation 4269. Up to 2113 conditions per place. [2023-08-29 19:43:06,190 INFO L137 encePairwiseOnDemand]: 338/342 looper letters, 38 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-29 19:43:06,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 170 flow [2023-08-29 19:43:06,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-29 19:43:06,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49122807017543857 [2023-08-29 19:43:06,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-29 19:43:06,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-29 19:43:06,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:06,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-29 19:43:06,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:06,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:06,197 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:06,197 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 504 transitions. [2023-08-29 19:43:06,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 170 flow [2023-08-29 19:43:06,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:06,199 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-08-29 19:43:06,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-29 19:43:06,200 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-29 19:43:06,200 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-08-29 19:43:06,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:06,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:06,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:43:06,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:06,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:06,410 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:06,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:06,411 INFO L85 PathProgramCache]: Analyzing trace with hash 667655670, now seen corresponding path program 1 times [2023-08-29 19:43:06,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:06,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533987535] [2023-08-29 19:43:06,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:06,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:06,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:06,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:06,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 19:43:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:06,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 19:43:06,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:06,502 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 19:43:06,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-29 19:43:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:06,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:06,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:06,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533987535] [2023-08-29 19:43:06,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533987535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:06,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:06,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:43:06,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296039268] [2023-08-29 19:43:06,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:06,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:06,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:06,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:06,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:06,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 342 [2023-08-29 19:43:06,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:06,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:06,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 342 [2023-08-29 19:43:06,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:06,771 INFO L130 PetriNetUnfolder]: 1013/1592 cut-off events. [2023-08-29 19:43:06,772 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:06,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3183 conditions, 1592 events. 1013/1592 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7048 event pairs, 811 based on Foata normal form. 0/970 useless extension candidates. Maximal degree in co-relation 3179. Up to 1571 conditions per place. [2023-08-29 19:43:06,779 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-29 19:43:06,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 166 flow [2023-08-29 19:43:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-29 19:43:06,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48927875243664715 [2023-08-29 19:43:06,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-29 19:43:06,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-29 19:43:06,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:06,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-29 19:43:06,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:06,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:06,796 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:06,796 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 502 transitions. [2023-08-29 19:43:06,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 166 flow [2023-08-29 19:43:06,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:06,797 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-29 19:43:06,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-29 19:43:06,798 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-29 19:43:06,798 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-29 19:43:06,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:06,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:06,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:43:06,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:07,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:07,009 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:07,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:07,009 INFO L85 PathProgramCache]: Analyzing trace with hash 667655669, now seen corresponding path program 1 times [2023-08-29 19:43:07,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:07,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447684138] [2023-08-29 19:43:07,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:07,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:07,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:07,011 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:07,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 19:43:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:07,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 19:43:07,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:07,111 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 19:43:07,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2023-08-29 19:43:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:07,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:07,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:07,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447684138] [2023-08-29 19:43:07,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447684138] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:07,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:07,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:43:07,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618312757] [2023-08-29 19:43:07,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:07,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:07,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:07,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:07,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:07,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 342 [2023-08-29 19:43:07,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:07,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:07,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 342 [2023-08-29 19:43:07,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:07,369 INFO L130 PetriNetUnfolder]: 639/1044 cut-off events. [2023-08-29 19:43:07,369 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 19:43:07,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2093 conditions, 1044 events. 639/1044 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4435 event pairs, 501 based on Foata normal form. 0/734 useless extension candidates. Maximal degree in co-relation 2089. Up to 1029 conditions per place. [2023-08-29 19:43:07,374 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 36 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-29 19:43:07,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 162 flow [2023-08-29 19:43:07,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-29 19:43:07,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-29 19:43:07,377 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-29 19:43:07,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-29 19:43:07,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:07,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-29 19:43:07,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:07,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:07,381 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:07,381 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 513 transitions. [2023-08-29 19:43:07,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 162 flow [2023-08-29 19:43:07,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:07,383 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-29 19:43:07,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-29 19:43:07,383 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-08-29 19:43:07,384 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-29 19:43:07,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:07,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:07,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:43:07,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:07,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:07,594 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:07,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:07,594 INFO L85 PathProgramCache]: Analyzing trace with hash -778212206, now seen corresponding path program 1 times [2023-08-29 19:43:07,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:07,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068664014] [2023-08-29 19:43:07,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:07,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:07,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:07,596 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:07,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 19:43:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:07,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 19:43:07,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:07,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:07,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:07,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068664014] [2023-08-29 19:43:07,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068664014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:07,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:07,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:43:07,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560348481] [2023-08-29 19:43:07,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:07,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:07,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:07,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:07,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:07,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-08-29 19:43:07,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:07,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:07,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-08-29 19:43:07,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:07,938 INFO L130 PetriNetUnfolder]: 1075/1762 cut-off events. [2023-08-29 19:43:07,938 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-29 19:43:07,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3526 conditions, 1762 events. 1075/1762 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7985 event pairs, 312 based on Foata normal form. 0/1264 useless extension candidates. Maximal degree in co-relation 3522. Up to 1042 conditions per place. [2023-08-29 19:43:07,945 INFO L137 encePairwiseOnDemand]: 337/342 looper letters, 65 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-08-29 19:43:07,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 70 transitions, 291 flow [2023-08-29 19:43:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:07,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-08-29 19:43:07,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331384015594542 [2023-08-29 19:43:07,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-08-29 19:43:07,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-08-29 19:43:07,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:07,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-08-29 19:43:07,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:07,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:07,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:07,952 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 547 transitions. [2023-08-29 19:43:07,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 70 transitions, 291 flow [2023-08-29 19:43:07,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 70 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:07,956 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 112 flow [2023-08-29 19:43:07,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-08-29 19:43:07,959 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-29 19:43:07,959 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 112 flow [2023-08-29 19:43:07,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:07,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:07,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:43:07,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:08,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:08,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:08,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:08,169 INFO L85 PathProgramCache]: Analyzing trace with hash -778213138, now seen corresponding path program 1 times [2023-08-29 19:43:08,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:08,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736392613] [2023-08-29 19:43:08,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:08,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:08,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:08,171 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:08,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 19:43:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:08,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 19:43:08,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:08,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:43:08,314 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-29 19:43:08,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2023-08-29 19:43:08,332 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 19:43:08,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 19:43:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:08,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:08,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:08,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736392613] [2023-08-29 19:43:08,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736392613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:08,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:08,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:08,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636932848] [2023-08-29 19:43:08,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:08,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:43:08,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:08,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:43:08,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:43:09,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 342 [2023-08-29 19:43:09,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:09,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:09,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 342 [2023-08-29 19:43:09,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:09,703 INFO L130 PetriNetUnfolder]: 1340/2193 cut-off events. [2023-08-29 19:43:09,704 INFO L131 PetriNetUnfolder]: For 326/326 co-relation queries the response was YES. [2023-08-29 19:43:09,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4731 conditions, 2193 events. 1340/2193 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10128 event pairs, 243 based on Foata normal form. 0/1695 useless extension candidates. Maximal degree in co-relation 4726. Up to 1690 conditions per place. [2023-08-29 19:43:09,713 INFO L137 encePairwiseOnDemand]: 336/342 looper letters, 91 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2023-08-29 19:43:09,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 99 transitions, 449 flow [2023-08-29 19:43:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:43:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:43:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 876 transitions. [2023-08-29 19:43:09,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512280701754386 [2023-08-29 19:43:09,717 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 876 transitions. [2023-08-29 19:43:09,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 876 transitions. [2023-08-29 19:43:09,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:09,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 876 transitions. [2023-08-29 19:43:09,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.2) internal successors, (876), 5 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:09,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 342.0) internal successors, (2052), 6 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:09,722 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 342.0) internal successors, (2052), 6 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:09,722 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 112 flow. Second operand 5 states and 876 transitions. [2023-08-29 19:43:09,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 99 transitions, 449 flow [2023-08-29 19:43:09,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 99 transitions, 433 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:09,725 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 157 flow [2023-08-29 19:43:09,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-29 19:43:09,726 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-29 19:43:09,726 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 157 flow [2023-08-29 19:43:09,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:09,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:09,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:43:09,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:09,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:09,936 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:09,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:09,937 INFO L85 PathProgramCache]: Analyzing trace with hash -778213139, now seen corresponding path program 1 times [2023-08-29 19:43:09,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:09,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560629261] [2023-08-29 19:43:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:09,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:09,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:09,938 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:09,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 19:43:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:10,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 19:43:10,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:10,055 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2023-08-29 19:43:10,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2023-08-29 19:43:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:10,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:10,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:10,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560629261] [2023-08-29 19:43:10,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560629261] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:10,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:10,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:10,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889224856] [2023-08-29 19:43:10,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:10,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:43:10,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:10,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:43:10,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:43:10,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 342 [2023-08-29 19:43:10,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:10,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:10,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 342 [2023-08-29 19:43:10,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:11,212 INFO L130 PetriNetUnfolder]: 1527/2494 cut-off events. [2023-08-29 19:43:11,213 INFO L131 PetriNetUnfolder]: For 531/531 co-relation queries the response was YES. [2023-08-29 19:43:11,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5710 conditions, 2494 events. 1527/2494 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12159 event pairs, 505 based on Foata normal form. 0/2142 useless extension candidates. Maximal degree in co-relation 5702. Up to 1668 conditions per place. [2023-08-29 19:43:11,229 INFO L137 encePairwiseOnDemand]: 336/342 looper letters, 88 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2023-08-29 19:43:11,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 97 transitions, 477 flow [2023-08-29 19:43:11,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:43:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:43:11,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 864 transitions. [2023-08-29 19:43:11,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052631578947369 [2023-08-29 19:43:11,232 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 864 transitions. [2023-08-29 19:43:11,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 864 transitions. [2023-08-29 19:43:11,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:11,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 864 transitions. [2023-08-29 19:43:11,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:11,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 342.0) internal successors, (2052), 6 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:11,237 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 342.0) internal successors, (2052), 6 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:11,238 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 157 flow. Second operand 5 states and 864 transitions. [2023-08-29 19:43:11,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 97 transitions, 477 flow [2023-08-29 19:43:11,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 97 transitions, 477 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:43:11,242 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 200 flow [2023-08-29 19:43:11,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-08-29 19:43:11,245 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-29 19:43:11,245 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 200 flow [2023-08-29 19:43:11,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:11,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:11,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:11,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:11,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:11,455 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:11,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash -48791214, now seen corresponding path program 1 times [2023-08-29 19:43:11,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:11,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043416404] [2023-08-29 19:43:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:11,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:11,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:11,457 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:11,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 19:43:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:11,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 19:43:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:11,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:11,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:11,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043416404] [2023-08-29 19:43:11,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043416404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:11,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:11,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:43:11,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410915286] [2023-08-29 19:43:11,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:11,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:11,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:11,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:11,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:11,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-08-29 19:43:11,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:11,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:11,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-08-29 19:43:11,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:11,812 INFO L130 PetriNetUnfolder]: 1272/2115 cut-off events. [2023-08-29 19:43:11,812 INFO L131 PetriNetUnfolder]: For 832/832 co-relation queries the response was YES. [2023-08-29 19:43:11,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4966 conditions, 2115 events. 1272/2115 cut-off events. For 832/832 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9962 event pairs, 578 based on Foata normal form. 0/1809 useless extension candidates. Maximal degree in co-relation 4955. Up to 1371 conditions per place. [2023-08-29 19:43:11,824 INFO L137 encePairwiseOnDemand]: 338/342 looper letters, 65 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-29 19:43:11,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 366 flow [2023-08-29 19:43:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:11,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:11,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-08-29 19:43:11,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243664717348928 [2023-08-29 19:43:11,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-08-29 19:43:11,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-08-29 19:43:11,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:11,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-08-29 19:43:11,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:11,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:11,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:11,830 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 200 flow. Second operand 3 states and 538 transitions. [2023-08-29 19:43:11,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 366 flow [2023-08-29 19:43:11,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 341 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-29 19:43:11,834 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 159 flow [2023-08-29 19:43:11,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-08-29 19:43:11,834 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-29 19:43:11,834 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 159 flow [2023-08-29 19:43:11,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:11,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:11,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:11,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:12,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:12,045 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:12,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:12,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2144972854, now seen corresponding path program 1 times [2023-08-29 19:43:12,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:12,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089591656] [2023-08-29 19:43:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:12,046 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:12,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:12,047 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:12,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 19:43:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:12,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:43:12,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:12,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:12,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:12,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089591656] [2023-08-29 19:43:12,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089591656] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:12,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:12,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:43:12,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960527366] [2023-08-29 19:43:12,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:12,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:12,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:12,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:12,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:12,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-08-29 19:43:12,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:12,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:12,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-08-29 19:43:12,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:12,393 INFO L130 PetriNetUnfolder]: 1367/2262 cut-off events. [2023-08-29 19:43:12,394 INFO L131 PetriNetUnfolder]: For 699/699 co-relation queries the response was YES. [2023-08-29 19:43:12,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5441 conditions, 2262 events. 1367/2262 cut-off events. For 699/699 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10896 event pairs, 972 based on Foata normal form. 66/2120 useless extension candidates. Maximal degree in co-relation 5432. Up to 2056 conditions per place. [2023-08-29 19:43:12,403 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 65 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2023-08-29 19:43:12,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 370 flow [2023-08-29 19:43:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:12,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-29 19:43:12,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214424951267057 [2023-08-29 19:43:12,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-29 19:43:12,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-29 19:43:12,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:12,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-29 19:43:12,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:12,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:12,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:12,421 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 159 flow. Second operand 3 states and 535 transitions. [2023-08-29 19:43:12,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 370 flow [2023-08-29 19:43:12,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:12,424 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 182 flow [2023-08-29 19:43:12,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2023-08-29 19:43:12,425 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-29 19:43:12,425 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 182 flow [2023-08-29 19:43:12,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:12,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:12,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:12,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:12,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:12,635 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:12,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:12,636 INFO L85 PathProgramCache]: Analyzing trace with hash -642736256, now seen corresponding path program 1 times [2023-08-29 19:43:12,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:12,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786250692] [2023-08-29 19:43:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:12,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:12,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:12,638 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:12,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 19:43:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:12,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 19:43:12,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:12,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:12,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:12,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786250692] [2023-08-29 19:43:12,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786250692] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:12,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:12,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:12,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363153597] [2023-08-29 19:43:12,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:12,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:12,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:12,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:12,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:12,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-08-29 19:43:12,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:12,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:12,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-08-29 19:43:12,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:13,020 INFO L130 PetriNetUnfolder]: 1452/2429 cut-off events. [2023-08-29 19:43:13,020 INFO L131 PetriNetUnfolder]: For 1025/1025 co-relation queries the response was YES. [2023-08-29 19:43:13,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6029 conditions, 2429 events. 1452/2429 cut-off events. For 1025/1025 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12637 event pairs, 662 based on Foata normal form. 12/2167 useless extension candidates. Maximal degree in co-relation 6019. Up to 2082 conditions per place. [2023-08-29 19:43:13,029 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 71 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-29 19:43:13,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 74 transitions, 397 flow [2023-08-29 19:43:13,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:13,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-08-29 19:43:13,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272904483430799 [2023-08-29 19:43:13,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-08-29 19:43:13,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-08-29 19:43:13,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:13,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-08-29 19:43:13,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:13,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:13,036 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:13,036 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 182 flow. Second operand 3 states and 541 transitions. [2023-08-29 19:43:13,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 74 transitions, 397 flow [2023-08-29 19:43:13,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 74 transitions, 389 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:43:13,042 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 184 flow [2023-08-29 19:43:13,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-08-29 19:43:13,043 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-29 19:43:13,043 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 184 flow [2023-08-29 19:43:13,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:13,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:13,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:13,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:13,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:13,253 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:13,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1556724250, now seen corresponding path program 1 times [2023-08-29 19:43:13,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:13,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604590507] [2023-08-29 19:43:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:13,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:13,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:13,255 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:13,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 19:43:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:13,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 19:43:13,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:13,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:43:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:13,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:13,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604590507] [2023-08-29 19:43:13,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604590507] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:43:13,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 19:43:13,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-29 19:43:13,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247482909] [2023-08-29 19:43:13,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 19:43:13,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 19:43:13,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:13,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 19:43:13,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 19:43:13,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 342 [2023-08-29 19:43:13,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 184 flow. Second operand has 8 states, 8 states have (on average 158.375) internal successors, (1267), 8 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:13,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:13,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 342 [2023-08-29 19:43:13,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:14,502 INFO L130 PetriNetUnfolder]: 3718/6089 cut-off events. [2023-08-29 19:43:14,503 INFO L131 PetriNetUnfolder]: For 2338/2338 co-relation queries the response was YES. [2023-08-29 19:43:14,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15406 conditions, 6089 events. 3718/6089 cut-off events. For 2338/2338 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 32943 event pairs, 589 based on Foata normal form. 100/5439 useless extension candidates. Maximal degree in co-relation 15395. Up to 1333 conditions per place. [2023-08-29 19:43:14,533 INFO L137 encePairwiseOnDemand]: 335/342 looper letters, 282 selfloop transitions, 32 changer transitions 0/314 dead transitions. [2023-08-29 19:43:14,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 314 transitions, 1586 flow [2023-08-29 19:43:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 19:43:14,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 19:43:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2306 transitions. [2023-08-29 19:43:14,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186684660368871 [2023-08-29 19:43:14,540 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2306 transitions. [2023-08-29 19:43:14,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2306 transitions. [2023-08-29 19:43:14,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:14,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2306 transitions. [2023-08-29 19:43:14,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 177.3846153846154) internal successors, (2306), 13 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:14,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 342.0) internal successors, (4788), 14 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:14,577 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 342.0) internal successors, (4788), 14 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:14,577 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 184 flow. Second operand 13 states and 2306 transitions. [2023-08-29 19:43:14,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 314 transitions, 1586 flow [2023-08-29 19:43:14,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 314 transitions, 1582 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:14,586 INFO L231 Difference]: Finished difference. Result has 67 places, 79 transitions, 428 flow [2023-08-29 19:43:14,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=428, PETRI_PLACES=67, PETRI_TRANSITIONS=79} [2023-08-29 19:43:14,587 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2023-08-29 19:43:14,588 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 79 transitions, 428 flow [2023-08-29 19:43:14,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 158.375) internal successors, (1267), 8 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:14,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:14,589 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:14,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:14,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:14,798 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:14,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:14,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1556725182, now seen corresponding path program 1 times [2023-08-29 19:43:14,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:14,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377077733] [2023-08-29 19:43:14,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:14,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:14,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:14,801 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:14,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 19:43:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:14,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 19:43:14,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:14,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:43:14,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:43:14,938 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:43:14,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-29 19:43:14,973 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2023-08-29 19:43:14,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2023-08-29 19:43:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:15,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:43:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:15,566 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:15,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377077733] [2023-08-29 19:43:15,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377077733] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:43:15,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 19:43:15,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 19:43:15,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645457721] [2023-08-29 19:43:15,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 19:43:15,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 19:43:15,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:15,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 19:43:15,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-29 19:43:17,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 342 [2023-08-29 19:43:17,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 428 flow. Second operand has 12 states, 12 states have (on average 152.33333333333334) internal successors, (1828), 12 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:17,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:17,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 342 [2023-08-29 19:43:17,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:20,960 INFO L130 PetriNetUnfolder]: 5558/9121 cut-off events. [2023-08-29 19:43:20,960 INFO L131 PetriNetUnfolder]: For 7872/7872 co-relation queries the response was YES. [2023-08-29 19:43:20,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25157 conditions, 9121 events. 5558/9121 cut-off events. For 7872/7872 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 53355 event pairs, 1601 based on Foata normal form. 90/8101 useless extension candidates. Maximal degree in co-relation 25143. Up to 5884 conditions per place. [2023-08-29 19:43:21,004 INFO L137 encePairwiseOnDemand]: 335/342 looper letters, 261 selfloop transitions, 27 changer transitions 0/288 dead transitions. [2023-08-29 19:43:21,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 288 transitions, 1701 flow [2023-08-29 19:43:21,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:43:21,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:43:21,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2329 transitions. [2023-08-29 19:43:21,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48642439431913115 [2023-08-29 19:43:21,012 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2329 transitions. [2023-08-29 19:43:21,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2329 transitions. [2023-08-29 19:43:21,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:21,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2329 transitions. [2023-08-29 19:43:21,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 166.35714285714286) internal successors, (2329), 14 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 342.0) internal successors, (5130), 15 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,023 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 342.0) internal successors, (5130), 15 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,023 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 428 flow. Second operand 14 states and 2329 transitions. [2023-08-29 19:43:21,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 288 transitions, 1701 flow [2023-08-29 19:43:21,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 288 transitions, 1641 flow, removed 30 selfloop flow, removed 0 redundant places. [2023-08-29 19:43:21,052 INFO L231 Difference]: Finished difference. Result has 89 places, 102 transitions, 671 flow [2023-08-29 19:43:21,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=671, PETRI_PLACES=89, PETRI_TRANSITIONS=102} [2023-08-29 19:43:21,053 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2023-08-29 19:43:21,053 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 102 transitions, 671 flow [2023-08-29 19:43:21,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.33333333333334) internal successors, (1828), 12 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:21,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:21,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-08-29 19:43:21,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:21,265 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:21,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:21,266 INFO L85 PathProgramCache]: Analyzing trace with hash 921987, now seen corresponding path program 1 times [2023-08-29 19:43:21,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:21,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675435859] [2023-08-29 19:43:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:21,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:21,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:21,268 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:21,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 19:43:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:21,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 19:43:21,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:21,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-08-29 19:43:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:21,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:21,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:21,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675435859] [2023-08-29 19:43:21,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675435859] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:21,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:21,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:21,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737068753] [2023-08-29 19:43:21,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:21,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:21,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:21,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:21,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:21,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 342 [2023-08-29 19:43:21,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 102 transitions, 671 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:21,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 342 [2023-08-29 19:43:21,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:21,734 INFO L130 PetriNetUnfolder]: 1329/2548 cut-off events. [2023-08-29 19:43:21,734 INFO L131 PetriNetUnfolder]: For 3151/3151 co-relation queries the response was YES. [2023-08-29 19:43:21,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7231 conditions, 2548 events. 1329/2548 cut-off events. For 3151/3151 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 13382 event pairs, 235 based on Foata normal form. 120/2490 useless extension candidates. Maximal degree in co-relation 7207. Up to 1916 conditions per place. [2023-08-29 19:43:21,746 INFO L137 encePairwiseOnDemand]: 337/342 looper letters, 67 selfloop transitions, 8 changer transitions 0/81 dead transitions. [2023-08-29 19:43:21,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 603 flow [2023-08-29 19:43:21,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-29 19:43:21,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058479532163743 [2023-08-29 19:43:21,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-29 19:43:21,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-29 19:43:21,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:21,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-29 19:43:21,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,753 INFO L175 Difference]: Start difference. First operand has 89 places, 102 transitions, 671 flow. Second operand 3 states and 519 transitions. [2023-08-29 19:43:21,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 603 flow [2023-08-29 19:43:21,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 81 transitions, 583 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-08-29 19:43:21,765 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 425 flow [2023-08-29 19:43:21,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=425, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2023-08-29 19:43:21,766 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2023-08-29 19:43:21,766 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 425 flow [2023-08-29 19:43:21,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:21,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:21,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:21,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:21,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:21,977 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:21,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:21,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1594065870, now seen corresponding path program 1 times [2023-08-29 19:43:21,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:21,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427902447] [2023-08-29 19:43:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:21,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:21,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:21,979 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:21,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-29 19:43:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:22,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 19:43:22,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:22,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:22,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:22,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427902447] [2023-08-29 19:43:22,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427902447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:22,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:22,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:43:22,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359733202] [2023-08-29 19:43:22,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:22,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:43:22,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:22,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:43:22,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:43:22,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 342 [2023-08-29 19:43:22,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 425 flow. Second operand has 7 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:22,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:22,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 342 [2023-08-29 19:43:22,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:22,938 INFO L130 PetriNetUnfolder]: 1681/3192 cut-off events. [2023-08-29 19:43:22,938 INFO L131 PetriNetUnfolder]: For 2562/2562 co-relation queries the response was YES. [2023-08-29 19:43:22,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9215 conditions, 3192 events. 1681/3192 cut-off events. For 2562/2562 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 17039 event pairs, 409 based on Foata normal form. 0/3120 useless extension candidates. Maximal degree in co-relation 9192. Up to 1584 conditions per place. [2023-08-29 19:43:22,954 INFO L137 encePairwiseOnDemand]: 334/342 looper letters, 105 selfloop transitions, 10 changer transitions 0/121 dead transitions. [2023-08-29 19:43:22,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 871 flow [2023-08-29 19:43:22,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 19:43:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 19:43:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1287 transitions. [2023-08-29 19:43:22,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47039473684210525 [2023-08-29 19:43:22,958 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1287 transitions. [2023-08-29 19:43:22,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1287 transitions. [2023-08-29 19:43:22,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:22,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1287 transitions. [2023-08-29 19:43:22,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 160.875) internal successors, (1287), 8 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:22,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 342.0) internal successors, (3078), 9 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:22,965 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 342.0) internal successors, (3078), 9 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:22,965 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 425 flow. Second operand 8 states and 1287 transitions. [2023-08-29 19:43:22,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 871 flow [2023-08-29 19:43:22,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 121 transitions, 857 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:22,974 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 482 flow [2023-08-29 19:43:22,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=482, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2023-08-29 19:43:22,975 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 38 predicate places. [2023-08-29 19:43:22,975 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 482 flow [2023-08-29 19:43:22,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:22,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:22,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:22,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:23,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:23,186 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:23,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:23,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1513666805, now seen corresponding path program 1 times [2023-08-29 19:43:23,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:23,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451264640] [2023-08-29 19:43:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:23,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:23,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:23,189 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:23,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-29 19:43:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:23,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 19:43:23,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:23,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:23,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:23,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451264640] [2023-08-29 19:43:23,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451264640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:23,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:23,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-29 19:43:23,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373674385] [2023-08-29 19:43:23,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:23,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 19:43:23,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:23,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 19:43:23,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-29 19:43:24,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 342 [2023-08-29 19:43:24,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 482 flow. Second operand has 13 states, 13 states have (on average 144.53846153846155) internal successors, (1879), 13 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:24,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:24,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 342 [2023-08-29 19:43:24,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:26,387 INFO L130 PetriNetUnfolder]: 2326/4329 cut-off events. [2023-08-29 19:43:26,387 INFO L131 PetriNetUnfolder]: For 3335/3335 co-relation queries the response was YES. [2023-08-29 19:43:26,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12422 conditions, 4329 events. 2326/4329 cut-off events. For 3335/3335 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 24551 event pairs, 697 based on Foata normal form. 38/4331 useless extension candidates. Maximal degree in co-relation 12396. Up to 2874 conditions per place. [2023-08-29 19:43:26,407 INFO L137 encePairwiseOnDemand]: 327/342 looper letters, 191 selfloop transitions, 33 changer transitions 0/224 dead transitions. [2023-08-29 19:43:26,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 224 transitions, 1476 flow [2023-08-29 19:43:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 19:43:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 19:43:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2610 transitions. [2023-08-29 19:43:26,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44891640866873067 [2023-08-29 19:43:26,415 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2610 transitions. [2023-08-29 19:43:26,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2610 transitions. [2023-08-29 19:43:26,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:26,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2610 transitions. [2023-08-29 19:43:26,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 153.52941176470588) internal successors, (2610), 17 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:26,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 342.0) internal successors, (6156), 18 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:26,430 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 342.0) internal successors, (6156), 18 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:26,430 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 482 flow. Second operand 17 states and 2610 transitions. [2023-08-29 19:43:26,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 224 transitions, 1476 flow [2023-08-29 19:43:26,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 224 transitions, 1471 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:43:26,443 INFO L231 Difference]: Finished difference. Result has 114 places, 103 transitions, 820 flow [2023-08-29 19:43:26,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=820, PETRI_PLACES=114, PETRI_TRANSITIONS=103} [2023-08-29 19:43:26,445 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 65 predicate places. [2023-08-29 19:43:26,445 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 103 transitions, 820 flow [2023-08-29 19:43:26,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 144.53846153846155) internal successors, (1879), 13 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:26,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:26,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:26,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:26,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:26,656 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:26,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:26,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1081105184, now seen corresponding path program 1 times [2023-08-29 19:43:26,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:26,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217990085] [2023-08-29 19:43:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:26,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:26,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:26,658 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:26,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-29 19:43:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:26,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 19:43:26,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:43:26,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:26,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:26,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217990085] [2023-08-29 19:43:26,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217990085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:26,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:26,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:43:26,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186171941] [2023-08-29 19:43:26,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:26,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:43:26,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:26,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:43:26,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:43:26,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-08-29 19:43:26,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 103 transitions, 820 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:26,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:26,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-08-29 19:43:26,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:27,260 INFO L130 PetriNetUnfolder]: 2567/4906 cut-off events. [2023-08-29 19:43:27,261 INFO L131 PetriNetUnfolder]: For 8199/8199 co-relation queries the response was YES. [2023-08-29 19:43:27,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16231 conditions, 4906 events. 2567/4906 cut-off events. For 8199/8199 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 29718 event pairs, 1741 based on Foata normal form. 102/4954 useless extension candidates. Maximal degree in co-relation 16191. Up to 4025 conditions per place. [2023-08-29 19:43:27,322 INFO L137 encePairwiseOnDemand]: 338/342 looper letters, 146 selfloop transitions, 3 changer transitions 0/157 dead transitions. [2023-08-29 19:43:27,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 157 transitions, 1508 flow [2023-08-29 19:43:27,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:43:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:43:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-08-29 19:43:27,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282651072124757 [2023-08-29 19:43:27,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-08-29 19:43:27,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-08-29 19:43:27,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:27,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-08-29 19:43:27,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,328 INFO L175 Difference]: Start difference. First operand has 114 places, 103 transitions, 820 flow. Second operand 3 states and 542 transitions. [2023-08-29 19:43:27,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 157 transitions, 1508 flow [2023-08-29 19:43:27,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 157 transitions, 1482 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-08-29 19:43:27,363 INFO L231 Difference]: Finished difference. Result has 117 places, 105 transitions, 815 flow [2023-08-29 19:43:27,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=815, PETRI_PLACES=117, PETRI_TRANSITIONS=105} [2023-08-29 19:43:27,364 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 68 predicate places. [2023-08-29 19:43:27,364 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 105 transitions, 815 flow [2023-08-29 19:43:27,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:27,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:27,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:27,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-08-29 19:43:27,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:27,574 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:27,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:27,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1405982527, now seen corresponding path program 1 times [2023-08-29 19:43:27,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:27,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313419490] [2023-08-29 19:43:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:27,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:27,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:27,577 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:27,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-29 19:43:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:27,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-29 19:43:27,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:27,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 19:43:28,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-29 19:43:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:28,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:28,074 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:28,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313419490] [2023-08-29 19:43:28,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313419490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:28,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:28,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:43:28,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193854803] [2023-08-29 19:43:28,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:28,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:43:28,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:28,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:43:28,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:43:29,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 342 [2023-08-29 19:43:29,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 105 transitions, 815 flow. Second operand has 15 states, 15 states have (on average 134.46666666666667) internal successors, (2017), 15 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:29,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:29,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 342 [2023-08-29 19:43:29,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:31,417 INFO L130 PetriNetUnfolder]: 3358/6298 cut-off events. [2023-08-29 19:43:31,417 INFO L131 PetriNetUnfolder]: For 9484/9484 co-relation queries the response was YES. [2023-08-29 19:43:31,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21674 conditions, 6298 events. 3358/6298 cut-off events. For 9484/9484 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 38975 event pairs, 1092 based on Foata normal form. 12/6310 useless extension candidates. Maximal degree in co-relation 21632. Up to 4791 conditions per place. [2023-08-29 19:43:31,443 INFO L137 encePairwiseOnDemand]: 325/342 looper letters, 235 selfloop transitions, 47 changer transitions 0/282 dead transitions. [2023-08-29 19:43:31,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 282 transitions, 2252 flow [2023-08-29 19:43:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-29 19:43:31,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-29 19:43:31,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3256 transitions. [2023-08-29 19:43:31,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41393338418510045 [2023-08-29 19:43:31,452 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3256 transitions. [2023-08-29 19:43:31,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3256 transitions. [2023-08-29 19:43:31,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:31,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3256 transitions. [2023-08-29 19:43:31,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 141.56521739130434) internal successors, (3256), 23 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:31,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 342.0) internal successors, (8208), 24 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:31,469 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 342.0) internal successors, (8208), 24 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:31,469 INFO L175 Difference]: Start difference. First operand has 117 places, 105 transitions, 815 flow. Second operand 23 states and 3256 transitions. [2023-08-29 19:43:31,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 282 transitions, 2252 flow [2023-08-29 19:43:31,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 282 transitions, 2233 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-29 19:43:31,575 INFO L231 Difference]: Finished difference. Result has 154 places, 148 transitions, 1364 flow [2023-08-29 19:43:31,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1364, PETRI_PLACES=154, PETRI_TRANSITIONS=148} [2023-08-29 19:43:31,575 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 105 predicate places. [2023-08-29 19:43:31,575 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 148 transitions, 1364 flow [2023-08-29 19:43:31,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 134.46666666666667) internal successors, (2017), 15 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:31,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:31,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:31,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:31,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:31,777 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:31,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:31,777 INFO L85 PathProgramCache]: Analyzing trace with hash -206120617, now seen corresponding path program 2 times [2023-08-29 19:43:31,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:31,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113557532] [2023-08-29 19:43:31,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:43:31,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:31,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:31,779 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:31,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-29 19:43:31,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 19:43:31,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:43:31,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-29 19:43:31,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:31,915 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2023-08-29 19:43:31,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2023-08-29 19:43:32,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 19:43:32,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 19:43:32,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-29 19:43:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:32,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:32,431 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:32,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113557532] [2023-08-29 19:43:32,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113557532] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:32,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:32,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:43:32,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658947305] [2023-08-29 19:43:32,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:32,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:43:32,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:32,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:43:32,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:43:33,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 342 [2023-08-29 19:43:33,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 148 transitions, 1364 flow. Second operand has 16 states, 16 states have (on average 131.375) internal successors, (2102), 16 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:33,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:33,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 342 [2023-08-29 19:43:33,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:35,617 INFO L130 PetriNetUnfolder]: 3953/7412 cut-off events. [2023-08-29 19:43:35,617 INFO L131 PetriNetUnfolder]: For 12534/12534 co-relation queries the response was YES. [2023-08-29 19:43:35,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26548 conditions, 7412 events. 3953/7412 cut-off events. For 12534/12534 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 46900 event pairs, 1427 based on Foata normal form. 6/7418 useless extension candidates. Maximal degree in co-relation 26490. Up to 5783 conditions per place. [2023-08-29 19:43:35,672 INFO L137 encePairwiseOnDemand]: 325/342 looper letters, 236 selfloop transitions, 43 changer transitions 0/279 dead transitions. [2023-08-29 19:43:35,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 279 transitions, 2648 flow [2023-08-29 19:43:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 19:43:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 19:43:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2106 transitions. [2023-08-29 19:43:35,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2023-08-29 19:43:35,677 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2106 transitions. [2023-08-29 19:43:35,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2106 transitions. [2023-08-29 19:43:35,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:35,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2106 transitions. [2023-08-29 19:43:35,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 140.4) internal successors, (2106), 15 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:35,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 342.0) internal successors, (5472), 16 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:35,687 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 342.0) internal successors, (5472), 16 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:35,687 INFO L175 Difference]: Start difference. First operand has 154 places, 148 transitions, 1364 flow. Second operand 15 states and 2106 transitions. [2023-08-29 19:43:35,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 279 transitions, 2648 flow [2023-08-29 19:43:35,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 279 transitions, 2636 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-29 19:43:35,756 INFO L231 Difference]: Finished difference. Result has 177 places, 175 transitions, 1809 flow [2023-08-29 19:43:35,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1809, PETRI_PLACES=177, PETRI_TRANSITIONS=175} [2023-08-29 19:43:35,757 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 128 predicate places. [2023-08-29 19:43:35,757 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 175 transitions, 1809 flow [2023-08-29 19:43:35,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 131.375) internal successors, (2102), 16 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:35,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:35,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:35,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:35,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:35,968 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:35,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:35,968 INFO L85 PathProgramCache]: Analyzing trace with hash -329988519, now seen corresponding path program 3 times [2023-08-29 19:43:35,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:35,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109447986] [2023-08-29 19:43:35,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 19:43:35,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:35,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:35,970 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:35,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-29 19:43:36,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-29 19:43:36,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:43:36,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-29 19:43:36,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:36,083 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2023-08-29 19:43:36,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2023-08-29 19:43:36,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 19:43:36,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 19:43:36,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-29 19:43:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:43:36,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 19:43:36,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:36,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109447986] [2023-08-29 19:43:36,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109447986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:43:36,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:43:36,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:43:36,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603227191] [2023-08-29 19:43:36,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:43:36,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:43:36,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:36,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:43:36,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:43:38,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 342 [2023-08-29 19:43:38,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 175 transitions, 1809 flow. Second operand has 16 states, 16 states have (on average 131.375) internal successors, (2102), 16 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:38,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:38,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 342 [2023-08-29 19:43:38,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:40,487 INFO L130 PetriNetUnfolder]: 3941/7388 cut-off events. [2023-08-29 19:43:40,487 INFO L131 PetriNetUnfolder]: For 14687/14687 co-relation queries the response was YES. [2023-08-29 19:43:40,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27411 conditions, 7388 events. 3941/7388 cut-off events. For 14687/14687 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 46779 event pairs, 1109 based on Foata normal form. 12/7400 useless extension candidates. Maximal degree in co-relation 27343. Up to 3611 conditions per place. [2023-08-29 19:43:40,537 INFO L137 encePairwiseOnDemand]: 325/342 looper letters, 193 selfloop transitions, 105 changer transitions 0/298 dead transitions. [2023-08-29 19:43:40,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 298 transitions, 2930 flow [2023-08-29 19:43:40,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-29 19:43:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-29 19:43:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3037 transitions. [2023-08-29 19:43:40,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4036416799574694 [2023-08-29 19:43:40,543 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3037 transitions. [2023-08-29 19:43:40,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3037 transitions. [2023-08-29 19:43:40,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:40,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3037 transitions. [2023-08-29 19:43:40,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 138.04545454545453) internal successors, (3037), 22 states have internal predecessors, (3037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:40,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 342.0) internal successors, (7866), 23 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:40,554 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 342.0) internal successors, (7866), 23 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:40,555 INFO L175 Difference]: Start difference. First operand has 177 places, 175 transitions, 1809 flow. Second operand 22 states and 3037 transitions. [2023-08-29 19:43:40,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 298 transitions, 2930 flow [2023-08-29 19:43:40,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 298 transitions, 2911 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-29 19:43:40,643 INFO L231 Difference]: Finished difference. Result has 199 places, 186 transitions, 2146 flow [2023-08-29 19:43:40,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2146, PETRI_PLACES=199, PETRI_TRANSITIONS=186} [2023-08-29 19:43:40,644 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 150 predicate places. [2023-08-29 19:43:40,644 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 186 transitions, 2146 flow [2023-08-29 19:43:40,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 131.375) internal successors, (2102), 16 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:40,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:40,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:40,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:40,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:40,855 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:40,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:40,856 INFO L85 PathProgramCache]: Analyzing trace with hash 841701875, now seen corresponding path program 1 times [2023-08-29 19:43:40,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:40,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381721096] [2023-08-29 19:43:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:40,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:40,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:40,858 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:40,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-29 19:43:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:43:40,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:43:40,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:43:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:43:40,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:43:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:43:40,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 19:43:40,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381721096] [2023-08-29 19:43:40,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381721096] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:43:40,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 19:43:40,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-29 19:43:40,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282026103] [2023-08-29 19:43:40,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 19:43:40,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:43:40,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 19:43:40,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:43:40,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:43:40,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 342 [2023-08-29 19:43:40,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 186 transitions, 2146 flow. Second operand has 6 states, 6 states have (on average 162.83333333333334) internal successors, (977), 6 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:40,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:43:40,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 342 [2023-08-29 19:43:40,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:43:43,135 INFO L130 PetriNetUnfolder]: 7109/13924 cut-off events. [2023-08-29 19:43:43,135 INFO L131 PetriNetUnfolder]: For 36315/36319 co-relation queries the response was YES. [2023-08-29 19:43:43,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53946 conditions, 13924 events. 7109/13924 cut-off events. For 36315/36319 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 106504 event pairs, 2163 based on Foata normal form. 1756/15679 useless extension candidates. Maximal degree in co-relation 53873. Up to 3768 conditions per place. [2023-08-29 19:43:43,245 INFO L137 encePairwiseOnDemand]: 337/342 looper letters, 518 selfloop transitions, 22 changer transitions 0/551 dead transitions. [2023-08-29 19:43:43,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 551 transitions, 7226 flow [2023-08-29 19:43:43,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:43:43,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:43:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1087 transitions. [2023-08-29 19:43:43,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297270955165692 [2023-08-29 19:43:43,247 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1087 transitions. [2023-08-29 19:43:43,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1087 transitions. [2023-08-29 19:43:43,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:43:43,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1087 transitions. [2023-08-29 19:43:43,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:43,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:43,251 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:43,251 INFO L175 Difference]: Start difference. First operand has 199 places, 186 transitions, 2146 flow. Second operand 6 states and 1087 transitions. [2023-08-29 19:43:43,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 551 transitions, 7226 flow [2023-08-29 19:43:43,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 551 transitions, 6687 flow, removed 58 selfloop flow, removed 16 redundant places. [2023-08-29 19:43:43,425 INFO L231 Difference]: Finished difference. Result has 192 places, 197 transitions, 2161 flow [2023-08-29 19:43:43,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=1958, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2161, PETRI_PLACES=192, PETRI_TRANSITIONS=197} [2023-08-29 19:43:43,426 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 143 predicate places. [2023-08-29 19:43:43,426 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 197 transitions, 2161 flow [2023-08-29 19:43:43,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 162.83333333333334) internal successors, (977), 6 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:43:43,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:43:43,427 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:43,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:43,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:43,635 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-29 19:43:43,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:43:43,635 INFO L85 PathProgramCache]: Analyzing trace with hash -34660884, now seen corresponding path program 1 times [2023-08-29 19:43:43,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 19:43:43,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339813771] [2023-08-29 19:43:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:43:43,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:43,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 19:43:43,637 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 19:43:43,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-29 19:43:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:43:43,736 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 19:43:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 19:43:43,847 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-08-29 19:43:43,847 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 19:43:43,848 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-08-29 19:43:43,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-29 19:43:43,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-29 19:43:43,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-29 19:43:43,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-29 19:43:43,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-08-29 19:43:43,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-29 19:43:43,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-29 19:43:43,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-29 19:43:43,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-08-29 19:43:43,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-08-29 19:43:43,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-08-29 19:43:43,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-29 19:43:43,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-29 19:43:43,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-08-29 19:43:43,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2023-08-29 19:43:43,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-29 19:43:43,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-29 19:43:43,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-29 19:43:43,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-29 19:43:43,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-08-29 19:43:43,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-29 19:43:43,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-29 19:43:43,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-29 19:43:44,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 19:43:44,067 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:43:44,071 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 19:43:44,072 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 19:43:44,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 07:43:44 BasicIcfg [2023-08-29 19:43:44,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 19:43:44,113 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 19:43:44,113 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 19:43:44,113 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 19:43:44,114 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:42:55" (3/4) ... [2023-08-29 19:43:44,116 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-29 19:43:44,116 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 19:43:44,117 INFO L158 Benchmark]: Toolchain (without parser) took 50361.62ms. Allocated memory was 81.8MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 57.7MB in the beginning and 463.8MB in the end (delta: -406.1MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2023-08-29 19:43:44,117 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 60.8MB. Free memory is still 38.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:43:44,117 INFO L158 Benchmark]: CACSL2BoogieTranslator took 649.16ms. Allocated memory is still 81.8MB. Free memory was 57.5MB in the beginning and 48.2MB in the end (delta: 9.3MB). Peak memory consumption was 27.1MB. Max. memory is 16.1GB. [2023-08-29 19:43:44,117 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.00ms. Allocated memory is still 81.8MB. Free memory was 48.2MB in the beginning and 45.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 19:43:44,117 INFO L158 Benchmark]: Boogie Preprocessor took 35.66ms. Allocated memory is still 81.8MB. Free memory was 45.4MB in the beginning and 43.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 19:43:44,118 INFO L158 Benchmark]: RCFGBuilder took 649.02ms. Allocated memory is still 81.8MB. Free memory was 43.3MB in the beginning and 44.6MB in the end (delta: -1.3MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. [2023-08-29 19:43:44,118 INFO L158 Benchmark]: TraceAbstraction took 48977.57ms. Allocated memory was 81.8MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 43.9MB in the beginning and 463.8MB in the end (delta: -419.9MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2023-08-29 19:43:44,118 INFO L158 Benchmark]: Witness Printer took 2.87ms. Allocated memory is still 1.7GB. Free memory is still 463.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 19:43:44,119 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 60.8MB. Free memory is still 38.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 649.16ms. Allocated memory is still 81.8MB. Free memory was 57.5MB in the beginning and 48.2MB in the end (delta: 9.3MB). Peak memory consumption was 27.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.00ms. Allocated memory is still 81.8MB. Free memory was 48.2MB in the beginning and 45.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.66ms. Allocated memory is still 81.8MB. Free memory was 45.4MB in the beginning and 43.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 649.02ms. Allocated memory is still 81.8MB. Free memory was 43.3MB in the beginning and 44.6MB in the end (delta: -1.3MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. * TraceAbstraction took 48977.57ms. Allocated memory was 81.8MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 43.9MB in the beginning and 463.8MB in the end (delta: -419.9MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. * Witness Printer took 2.87ms. Allocated memory is still 1.7GB. Free memory is still 463.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.8s, 165 PlacesBefore, 49 PlacesAfterwards, 168 TransitionsBefore, 47 TransitionsAfterwards, 8060 CoEnabledTransitionPairs, 6 FixpointIterations, 48 TrivialSequentialCompositions, 95 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 20 ConcurrentYvCompositions, 5 ChoiceCompositions, 168 TotalNumberOfCompositions, 12825 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8572, independent: 8355, independent conditional: 0, independent unconditional: 8355, dependent: 217, dependent conditional: 0, dependent unconditional: 217, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4552, independent: 4498, independent conditional: 0, independent unconditional: 4498, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8572, independent: 3857, independent conditional: 0, independent unconditional: 3857, dependent: 163, dependent conditional: 0, dependent unconditional: 163, unknown: 4552, unknown conditional: 0, unknown unconditional: 4552] , Statistics on independence cache: Total cache size (in pairs): 279, Positive cache size: 258, Positive conditional cache size: 0, Positive unconditional cache size: 258, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 941. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-1, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=0, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=1, arr={3:0}, flag=1, m={4:0}, top=1] [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 265 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 48.7s, OverallIterations: 22, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 29.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 9.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5379 SdHoareTripleChecker+Valid, 18.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4560 mSDsluCounter, 6156 SdHoareTripleChecker+Invalid, 15.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6069 mSDsCounter, 177 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21308 IncrementalHoareTripleChecker+Invalid, 21485 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 177 mSolverCounterUnsat, 87 mSDtfsCounter, 21308 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 375 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2161occurred in iteration=21, InterpolantAutomatonStates: 160, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 291 NumberOfCodeBlocks, 291 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 293 ConstructedInterpolants, 10 QuantifiedInterpolants, 2414 SizeOfPredicates, 108 NumberOfNonLiveVariables, 2088 ConjunctsInSsa, 208 ConjunctsInUnsatCore, 24 InterpolantComputations, 18 PerfectInterpolantSequences, 5/17 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-29 19:43:44,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample