./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c --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/weaver/popl20-bad-threaded-sum-2.wvr.c -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 e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --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 23:55:36,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:55:36,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:55:36,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:55:36,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:55:36,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:55:36,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:55:36,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:55:36,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:55:36,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:55:36,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:55:36,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:55:36,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:55:36,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:55:36,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:55:36,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:55:36,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:55:36,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:55:36,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:55:36,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:55:36,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:55:36,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:55:36,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:55:36,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:55:36,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:55:36,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:55:36,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:55:36,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:55:36,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:55:36,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:55:36,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:55:36,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:55:36,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:55:36,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:55:36,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:55:36,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:55:36,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:55:36,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:55:36,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:55:36,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:55:36,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:55:36,149 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:55:36,167 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:55:36,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:55:36,168 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:55:36,168 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:55:36,169 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:55:36,169 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:55:36,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:55:36,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:55:36,169 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:55:36,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:55:36,170 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:55:36,170 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:55:36,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:55:36,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:55:36,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:55:36,171 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:55:36,171 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:55:36,171 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:55:36,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:55:36,172 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:55:36,172 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:55:36,172 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:55:36,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:55:36,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:55:36,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:55:36,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:55:36,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:55:36,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:55:36,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:55:36,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:55:36,173 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:55:36,173 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:55:36,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:55:36,174 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:55:36,174 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:55:36,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:55:36,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:55:36,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:55:36,421 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:55:36,421 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:55:36,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-08-29 23:55:37,412 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:55:37,564 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:55:37,565 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-08-29 23:55:37,570 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/079a9cf53/b190669f51d9479e84de5afe66656abc/FLAGa8a8e40c9 [2023-08-29 23:55:37,582 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/079a9cf53/b190669f51d9479e84de5afe66656abc [2023-08-29 23:55:37,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:55:37,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:55:37,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:55:37,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:55:37,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:55:37,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:55:37" (1/1) ... [2023-08-29 23:55:37,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f9ca2ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:37, skipping insertion in model container [2023-08-29 23:55:37,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:55:37" (1/1) ... [2023-08-29 23:55:37,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:55:37,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:55:37,709 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2023-08-29 23:55:37,712 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:55:37,718 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:55:37,750 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2023-08-29 23:55:37,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:55:37,759 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:55:37,760 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:55:37,764 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:55:37,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:37 WrapperNode [2023-08-29 23:55:37,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:55:37,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:55:37,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:55:37,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:55:37,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:37" (1/1) ... [2023-08-29 23:55:37,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:37" (1/1) ... [2023-08-29 23:55:37,804 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2023-08-29 23:55:37,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:55:37,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:55:37,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:55:37,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:55:37,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:37" (1/1) ... [2023-08-29 23:55:37,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:37" (1/1) ... [2023-08-29 23:55:37,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:37" (1/1) ... [2023-08-29 23:55:37,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:37" (1/1) ... [2023-08-29 23:55:37,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:37" (1/1) ... [2023-08-29 23:55:37,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:37" (1/1) ... [2023-08-29 23:55:37,836 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:37" (1/1) ... [2023-08-29 23:55:37,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:37" (1/1) ... [2023-08-29 23:55:37,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:55:37,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:55:37,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:55:37,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:55:37,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:37" (1/1) ... [2023-08-29 23:55:37,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:55:37,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:55:37,863 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 23:55:37,881 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 23:55:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:55:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:55:37,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:55:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:55:37,892 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:55:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 23:55:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:55:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 23:55:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:55:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:55:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:55:37,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:55:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 23:55:37,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:55:37,893 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 23:55:37,975 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:55:37,978 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:55:38,123 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:55:38,154 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:55:38,155 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 23:55:38,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:55:38 BoogieIcfgContainer [2023-08-29 23:55:38,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:55:38,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:55:38,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:55:38,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:55:38,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:55:37" (1/3) ... [2023-08-29 23:55:38,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be86b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:55:38, skipping insertion in model container [2023-08-29 23:55:38,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:37" (2/3) ... [2023-08-29 23:55:38,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be86b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:55:38, skipping insertion in model container [2023-08-29 23:55:38,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:55:38" (3/3) ... [2023-08-29 23:55:38,162 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2023-08-29 23:55:38,172 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:55:38,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-29 23:55:38,173 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:55:38,235 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 23:55:38,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 95 transitions, 206 flow [2023-08-29 23:55:38,312 INFO L130 PetriNetUnfolder]: 6/93 cut-off events. [2023-08-29 23:55:38,315 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:55:38,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 6/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-29 23:55:38,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 95 transitions, 206 flow [2023-08-29 23:55:38,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 89 transitions, 190 flow [2023-08-29 23:55:38,327 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:55:38,338 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 89 transitions, 190 flow [2023-08-29 23:55:38,343 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 89 transitions, 190 flow [2023-08-29 23:55:38,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 190 flow [2023-08-29 23:55:38,374 INFO L130 PetriNetUnfolder]: 6/89 cut-off events. [2023-08-29 23:55:38,374 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:55:38,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 89 events. 6/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-29 23:55:38,376 INFO L119 LiptonReduction]: Number of co-enabled transitions 532 [2023-08-29 23:55:40,631 INFO L134 LiptonReduction]: Checked pairs total: 987 [2023-08-29 23:55:40,632 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-29 23:55:40,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:55:40,644 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;@28629229, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:55:40,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-29 23:55:40,645 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 23:55:40,645 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:55:40,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:40,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 23:55:40,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:55:40,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:40,649 INFO L85 PathProgramCache]: Analyzing trace with hash 378, now seen corresponding path program 1 times [2023-08-29 23:55:40,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:55:40,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937931532] [2023-08-29 23:55:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:40,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:55:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:40,712 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 23:55:40,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:55:40,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937931532] [2023-08-29 23:55:40,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937931532] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:40,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:40,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 23:55:40,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596203764] [2023-08-29 23:55:40,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:40,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 23:55:40,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:55:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 23:55:40,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 23:55:40,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 182 [2023-08-29 23:55:40,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:40,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:40,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 182 [2023-08-29 23:55:40,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:40,814 INFO L130 PetriNetUnfolder]: 96/176 cut-off events. [2023-08-29 23:55:40,815 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 23:55:40,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 176 events. 96/176 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 704 event pairs, 66 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 273. Up to 172 conditions per place. [2023-08-29 23:55:40,818 INFO L137 encePairwiseOnDemand]: 179/182 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2023-08-29 23:55:40,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 98 flow [2023-08-29 23:55:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 23:55:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 23:55:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 189 transitions. [2023-08-29 23:55:40,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2023-08-29 23:55:40,828 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 189 transitions. [2023-08-29 23:55:40,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 189 transitions. [2023-08-29 23:55:40,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:40,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 189 transitions. [2023-08-29 23:55:40,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:40,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:40,840 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:40,841 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 2 states and 189 transitions. [2023-08-29 23:55:40,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 98 flow [2023-08-29 23:55:40,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 23:55:40,844 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 50 flow [2023-08-29 23:55:40,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-08-29 23:55:40,849 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2023-08-29 23:55:40,849 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 50 flow [2023-08-29 23:55:40,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:40,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:40,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:55:40,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 23:55:40,851 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:55:40,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:40,859 INFO L85 PathProgramCache]: Analyzing trace with hash 373573, now seen corresponding path program 1 times [2023-08-29 23:55:40,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:55:40,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050360795] [2023-08-29 23:55:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:40,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:55:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:40,996 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 23:55:40,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:55:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050360795] [2023-08-29 23:55:40,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050360795] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:40,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:40,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:55:40,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035526265] [2023-08-29 23:55:40,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:40,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:55:40,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:55:40,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:55:40,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:55:41,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 182 [2023-08-29 23:55:41,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:41,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 182 [2023-08-29 23:55:41,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:41,058 INFO L130 PetriNetUnfolder]: 89/162 cut-off events. [2023-08-29 23:55:41,058 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:55:41,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 162 events. 89/162 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 643 event pairs, 61 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 323. Up to 157 conditions per place. [2023-08-29 23:55:41,060 INFO L137 encePairwiseOnDemand]: 179/182 looper letters, 17 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-08-29 23:55:41,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 82 flow [2023-08-29 23:55:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-08-29 23:55:41,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432234432234432 [2023-08-29 23:55:41,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-08-29 23:55:41,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-08-29 23:55:41,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:41,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-08-29 23:55:41,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,064 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,064 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 50 flow. Second operand 3 states and 242 transitions. [2023-08-29 23:55:41,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 82 flow [2023-08-29 23:55:41,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 82 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:55:41,065 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 48 flow [2023-08-29 23:55:41,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-08-29 23:55:41,065 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2023-08-29 23:55:41,066 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 48 flow [2023-08-29 23:55:41,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:41,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:55:41,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 23:55:41,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:55:41,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:41,067 INFO L85 PathProgramCache]: Analyzing trace with hash 373572, now seen corresponding path program 1 times [2023-08-29 23:55:41,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:55:41,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029156846] [2023-08-29 23:55:41,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:41,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:55:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:41,162 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 23:55:41,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:55:41,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029156846] [2023-08-29 23:55:41,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029156846] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:41,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:41,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:55:41,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680486388] [2023-08-29 23:55:41,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:41,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:55:41,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:55:41,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:55:41,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:55:41,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 182 [2023-08-29 23:55:41,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:41,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 182 [2023-08-29 23:55:41,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:41,227 INFO L130 PetriNetUnfolder]: 82/148 cut-off events. [2023-08-29 23:55:41,228 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:55:41,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 148 events. 82/148 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 581 event pairs, 56 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 296. Up to 143 conditions per place. [2023-08-29 23:55:41,231 INFO L137 encePairwiseOnDemand]: 179/182 looper letters, 15 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-29 23:55:41,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 76 flow [2023-08-29 23:55:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:41,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2023-08-29 23:55:41,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-08-29 23:55:41,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2023-08-29 23:55:41,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2023-08-29 23:55:41,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:41,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2023-08-29 23:55:41,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,238 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,238 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 48 flow. Second operand 3 states and 252 transitions. [2023-08-29 23:55:41,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 76 flow [2023-08-29 23:55:41,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 19 transitions, 75 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:41,239 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 45 flow [2023-08-29 23:55:41,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=45, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2023-08-29 23:55:41,240 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2023-08-29 23:55:41,242 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 45 flow [2023-08-29 23:55:41,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:41,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:55:41,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 23:55:41,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:55:41,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:41,244 INFO L85 PathProgramCache]: Analyzing trace with hash 359010039, now seen corresponding path program 1 times [2023-08-29 23:55:41,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:55:41,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505563647] [2023-08-29 23:55:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:41,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:55:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:41,295 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 23:55:41,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:55:41,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505563647] [2023-08-29 23:55:41,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505563647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:41,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:41,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:55:41,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559958432] [2023-08-29 23:55:41,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:41,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:55:41,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:55:41,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:55:41,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:55:41,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 182 [2023-08-29 23:55:41,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 45 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:41,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 182 [2023-08-29 23:55:41,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:41,339 INFO L130 PetriNetUnfolder]: 62/116 cut-off events. [2023-08-29 23:55:41,339 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:55:41,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 116 events. 62/116 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 403 event pairs, 42 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 233. Up to 111 conditions per place. [2023-08-29 23:55:41,340 INFO L137 encePairwiseOnDemand]: 180/182 looper letters, 14 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-08-29 23:55:41,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 18 transitions, 73 flow [2023-08-29 23:55:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2023-08-29 23:55:41,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413919413919414 [2023-08-29 23:55:41,341 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2023-08-29 23:55:41,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2023-08-29 23:55:41,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:41,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2023-08-29 23:55:41,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,342 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 45 flow. Second operand 3 states and 241 transitions. [2023-08-29 23:55:41,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 18 transitions, 73 flow [2023-08-29 23:55:41,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:41,343 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 44 flow [2023-08-29 23:55:41,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-08-29 23:55:41,344 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2023-08-29 23:55:41,344 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 44 flow [2023-08-29 23:55:41,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:41,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:55:41,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 23:55:41,344 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:55:41,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:41,345 INFO L85 PathProgramCache]: Analyzing trace with hash 359010038, now seen corresponding path program 1 times [2023-08-29 23:55:41,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:55:41,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130136416] [2023-08-29 23:55:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:41,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:55:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:41,399 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 23:55:41,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:55:41,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130136416] [2023-08-29 23:55:41,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130136416] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:41,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:41,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:55:41,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136314592] [2023-08-29 23:55:41,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:41,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:55:41,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:55:41,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:55:41,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:55:41,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 182 [2023-08-29 23:55:41,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 44 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:41,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 182 [2023-08-29 23:55:41,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:41,463 INFO L130 PetriNetUnfolder]: 42/84 cut-off events. [2023-08-29 23:55:41,463 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:55:41,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 84 events. 42/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 246 event pairs, 28 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 170. Up to 79 conditions per place. [2023-08-29 23:55:41,464 INFO L137 encePairwiseOnDemand]: 180/182 looper letters, 13 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-29 23:55:41,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 70 flow [2023-08-29 23:55:41,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:41,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-29 23:55:41,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41208791208791207 [2023-08-29 23:55:41,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-29 23:55:41,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-29 23:55:41,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:41,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-29 23:55:41,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,467 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,468 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 44 flow. Second operand 3 states and 225 transitions. [2023-08-29 23:55:41,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 70 flow [2023-08-29 23:55:41,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:41,468 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 43 flow [2023-08-29 23:55:41,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-08-29 23:55:41,470 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2023-08-29 23:55:41,471 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 43 flow [2023-08-29 23:55:41,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:41,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:55:41,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 23:55:41,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:55:41,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:41,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1890048082, now seen corresponding path program 1 times [2023-08-29 23:55:41,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:55:41,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652062077] [2023-08-29 23:55:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:41,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:55:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:41,639 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 23:55:41,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:55:41,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652062077] [2023-08-29 23:55:41,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652062077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:41,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:41,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:55:41,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042614014] [2023-08-29 23:55:41,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:41,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:55:41,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:55:41,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:55:41,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:55:41,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 182 [2023-08-29 23:55:41,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 43 flow. Second operand has 5 states, 5 states have (on average 78.6) internal successors, (393), 5 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:41,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 182 [2023-08-29 23:55:41,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:41,731 INFO L130 PetriNetUnfolder]: 93/165 cut-off events. [2023-08-29 23:55:41,731 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:55:41,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 165 events. 93/165 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 528 event pairs, 3 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 334. Up to 74 conditions per place. [2023-08-29 23:55:41,732 INFO L137 encePairwiseOnDemand]: 176/182 looper letters, 34 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2023-08-29 23:55:41,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 43 transitions, 182 flow [2023-08-29 23:55:41,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:55:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:55:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 499 transitions. [2023-08-29 23:55:41,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45695970695970695 [2023-08-29 23:55:41,734 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 499 transitions. [2023-08-29 23:55:41,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 499 transitions. [2023-08-29 23:55:41,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:41,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 499 transitions. [2023-08-29 23:55:41,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.16666666666667) internal successors, (499), 6 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 182.0) internal successors, (1274), 7 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,737 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 182.0) internal successors, (1274), 7 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,737 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 43 flow. Second operand 6 states and 499 transitions. [2023-08-29 23:55:41,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 43 transitions, 182 flow [2023-08-29 23:55:41,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:41,738 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 88 flow [2023-08-29 23:55:41,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=88, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2023-08-29 23:55:41,739 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-08-29 23:55:41,739 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 88 flow [2023-08-29 23:55:41,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.6) internal successors, (393), 5 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:41,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:41,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:55:41,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 23:55:41,740 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:55:41,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:41,740 INFO L85 PathProgramCache]: Analyzing trace with hash 520833762, now seen corresponding path program 1 times [2023-08-29 23:55:41,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:55:41,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243894481] [2023-08-29 23:55:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:41,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:55:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:41,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:55:41,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243894481] [2023-08-29 23:55:41,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243894481] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:55:41,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440594234] [2023-08-29 23:55:41,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:41,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:55:41,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:55:41,946 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 23:55:41,947 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 23:55:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:41,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:55:41,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:42,080 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 23:55:42,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:42,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440594234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:42,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 23:55:42,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-08-29 23:55:42,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607101714] [2023-08-29 23:55:42,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:42,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:55:42,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:55:42,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:55:42,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:55:42,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 182 [2023-08-29 23:55:42,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:42,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:42,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 182 [2023-08-29 23:55:42,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:42,169 INFO L130 PetriNetUnfolder]: 85/151 cut-off events. [2023-08-29 23:55:42,169 INFO L131 PetriNetUnfolder]: For 66/72 co-relation queries the response was YES. [2023-08-29 23:55:42,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 151 events. 85/151 cut-off events. For 66/72 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 389 event pairs, 8 based on Foata normal form. 16/165 useless extension candidates. Maximal degree in co-relation 433. Up to 105 conditions per place. [2023-08-29 23:55:42,170 INFO L137 encePairwiseOnDemand]: 176/182 looper letters, 26 selfloop transitions, 7 changer transitions 0/35 dead transitions. [2023-08-29 23:55:42,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 195 flow [2023-08-29 23:55:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:55:42,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:55:42,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 413 transitions. [2023-08-29 23:55:42,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2023-08-29 23:55:42,171 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 413 transitions. [2023-08-29 23:55:42,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 413 transitions. [2023-08-29 23:55:42,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:42,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 413 transitions. [2023-08-29 23:55:42,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.6) internal successors, (413), 5 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:42,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:42,174 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:42,174 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 88 flow. Second operand 5 states and 413 transitions. [2023-08-29 23:55:42,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 195 flow [2023-08-29 23:55:42,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:42,176 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 131 flow [2023-08-29 23:55:42,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2023-08-29 23:55:42,177 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-08-29 23:55:42,177 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 131 flow [2023-08-29 23:55:42,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:42,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:42,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:55:42,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 23:55:42,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:55:42,382 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:55:42,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:42,382 INFO L85 PathProgramCache]: Analyzing trace with hash 367215616, now seen corresponding path program 2 times [2023-08-29 23:55:42,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:55:42,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160634916] [2023-08-29 23:55:42,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:42,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:55:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:42,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:55:42,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160634916] [2023-08-29 23:55:42,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160634916] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:55:42,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109711703] [2023-08-29 23:55:42,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:55:42,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:55:42,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:55:42,566 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 23:55:42,568 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 23:55:42,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:55:42,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:55:42,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:55:42,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:42,667 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 23:55:42,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:42,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109711703] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:42,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 23:55:42,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-08-29 23:55:42,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985463603] [2023-08-29 23:55:42,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:42,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:55:42,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:55:42,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:55:42,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:55:42,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 182 [2023-08-29 23:55:42,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:42,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:42,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 182 [2023-08-29 23:55:42,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:42,745 INFO L130 PetriNetUnfolder]: 114/200 cut-off events. [2023-08-29 23:55:42,745 INFO L131 PetriNetUnfolder]: For 182/192 co-relation queries the response was YES. [2023-08-29 23:55:42,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 200 events. 114/200 cut-off events. For 182/192 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 606 event pairs, 24 based on Foata normal form. 16/216 useless extension candidates. Maximal degree in co-relation 635. Up to 141 conditions per place. [2023-08-29 23:55:42,747 INFO L137 encePairwiseOnDemand]: 176/182 looper letters, 31 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2023-08-29 23:55:42,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 257 flow [2023-08-29 23:55:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:55:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:55:42,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 415 transitions. [2023-08-29 23:55:42,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2023-08-29 23:55:42,748 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 415 transitions. [2023-08-29 23:55:42,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 415 transitions. [2023-08-29 23:55:42,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:42,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 415 transitions. [2023-08-29 23:55:42,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:42,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:42,751 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:42,751 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 131 flow. Second operand 5 states and 415 transitions. [2023-08-29 23:55:42,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 257 flow [2023-08-29 23:55:42,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 253 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:42,755 INFO L231 Difference]: Finished difference. Result has 41 places, 26 transitions, 152 flow [2023-08-29 23:55:42,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=41, PETRI_TRANSITIONS=26} [2023-08-29 23:55:42,756 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2023-08-29 23:55:42,756 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 26 transitions, 152 flow [2023-08-29 23:55:42,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:42,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:42,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:55:42,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-29 23:55:42,961 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,SelfDestructingSolverStorable7 [2023-08-29 23:55:42,962 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:55:42,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:42,962 INFO L85 PathProgramCache]: Analyzing trace with hash -752114364, now seen corresponding path program 3 times [2023-08-29 23:55:42,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:55:42,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059547898] [2023-08-29 23:55:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:42,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:55:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:43,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:55:43,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059547898] [2023-08-29 23:55:43,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059547898] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:43,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:43,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:55:43,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114030262] [2023-08-29 23:55:43,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:43,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:55:43,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:55:43,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:55:43,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:55:43,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 182 [2023-08-29 23:55:43,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 26 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:43,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:43,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 182 [2023-08-29 23:55:43,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:43,321 INFO L130 PetriNetUnfolder]: 216/387 cut-off events. [2023-08-29 23:55:43,321 INFO L131 PetriNetUnfolder]: For 402/402 co-relation queries the response was YES. [2023-08-29 23:55:43,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 387 events. 216/387 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1463 event pairs, 34 based on Foata normal form. 4/391 useless extension candidates. Maximal degree in co-relation 1273. Up to 168 conditions per place. [2023-08-29 23:55:43,323 INFO L137 encePairwiseOnDemand]: 177/182 looper letters, 55 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2023-08-29 23:55:43,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 71 transitions, 466 flow [2023-08-29 23:55:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:55:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:55:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 584 transitions. [2023-08-29 23:55:43,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45839874411302983 [2023-08-29 23:55:43,325 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 584 transitions. [2023-08-29 23:55:43,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 584 transitions. [2023-08-29 23:55:43,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:43,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 584 transitions. [2023-08-29 23:55:43,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:43,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 182.0) internal successors, (1456), 8 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:43,329 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 182.0) internal successors, (1456), 8 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:43,329 INFO L175 Difference]: Start difference. First operand has 41 places, 26 transitions, 152 flow. Second operand 7 states and 584 transitions. [2023-08-29 23:55:43,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 71 transitions, 466 flow [2023-08-29 23:55:43,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 71 transitions, 453 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 23:55:43,333 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 279 flow [2023-08-29 23:55:43,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=279, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-08-29 23:55:43,334 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2023-08-29 23:55:43,334 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 279 flow [2023-08-29 23:55:43,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:43,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:43,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:55:43,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 23:55:43,335 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:55:43,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:43,335 INFO L85 PathProgramCache]: Analyzing trace with hash 703638542, now seen corresponding path program 4 times [2023-08-29 23:55:43,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:55:43,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200634585] [2023-08-29 23:55:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:43,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:55:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:43,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:55:43,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200634585] [2023-08-29 23:55:43,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200634585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:55:43,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801396446] [2023-08-29 23:55:43,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:55:43,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:55:43,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:55:43,781 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 23:55:43,783 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 23:55:43,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:55:43,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:55:43,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-29 23:55:43,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:44,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:55:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:44,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801396446] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:55:44,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:55:44,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-29 23:55:44,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790682653] [2023-08-29 23:55:44,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:55:44,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 23:55:44,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:55:44,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 23:55:44,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2023-08-29 23:55:44,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-08-29 23:55:44,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 279 flow. Second operand has 20 states, 20 states have (on average 68.25) internal successors, (1365), 20 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:44,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:44,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-08-29 23:55:44,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:47,338 INFO L130 PetriNetUnfolder]: 755/1383 cut-off events. [2023-08-29 23:55:47,339 INFO L131 PetriNetUnfolder]: For 3322/3322 co-relation queries the response was YES. [2023-08-29 23:55:47,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5474 conditions, 1383 events. 755/1383 cut-off events. For 3322/3322 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7544 event pairs, 32 based on Foata normal form. 21/1404 useless extension candidates. Maximal degree in co-relation 5459. Up to 493 conditions per place. [2023-08-29 23:55:47,345 INFO L137 encePairwiseOnDemand]: 172/182 looper letters, 121 selfloop transitions, 115 changer transitions 99/335 dead transitions. [2023-08-29 23:55:47,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 335 transitions, 2784 flow [2023-08-29 23:55:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-29 23:55:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-29 23:55:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3496 transitions. [2023-08-29 23:55:47,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39201614711818794 [2023-08-29 23:55:47,352 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3496 transitions. [2023-08-29 23:55:47,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3496 transitions. [2023-08-29 23:55:47,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:47,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3496 transitions. [2023-08-29 23:55:47,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 71.34693877551021) internal successors, (3496), 49 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:47,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 182.0) internal successors, (9100), 50 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:47,367 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 182.0) internal successors, (9100), 50 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:47,367 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 279 flow. Second operand 49 states and 3496 transitions. [2023-08-29 23:55:47,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 335 transitions, 2784 flow [2023-08-29 23:55:47,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 335 transitions, 2656 flow, removed 64 selfloop flow, removed 0 redundant places. [2023-08-29 23:55:47,378 INFO L231 Difference]: Finished difference. Result has 127 places, 163 transitions, 1658 flow [2023-08-29 23:55:47,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=1658, PETRI_PLACES=127, PETRI_TRANSITIONS=163} [2023-08-29 23:55:47,379 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 96 predicate places. [2023-08-29 23:55:47,379 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 163 transitions, 1658 flow [2023-08-29 23:55:47,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 68.25) internal successors, (1365), 20 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:47,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:47,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:55:47,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:47,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:55:47,584 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:55:47,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:47,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1382515146, now seen corresponding path program 1 times [2023-08-29 23:55:47,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:55:47,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569702372] [2023-08-29 23:55:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:47,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:55:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:47,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:55:47,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569702372] [2023-08-29 23:55:47,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569702372] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:47,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:47,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:55:47,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617764568] [2023-08-29 23:55:47,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:47,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:55:47,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:55:47,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:55:47,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:55:47,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 182 [2023-08-29 23:55:47,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 163 transitions, 1658 flow. Second operand has 5 states, 5 states have (on average 78.4) internal successors, (392), 5 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:47,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:47,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 182 [2023-08-29 23:55:47,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:47,933 INFO L130 PetriNetUnfolder]: 534/929 cut-off events. [2023-08-29 23:55:47,933 INFO L131 PetriNetUnfolder]: For 8377/8377 co-relation queries the response was YES. [2023-08-29 23:55:47,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5085 conditions, 929 events. 534/929 cut-off events. For 8377/8377 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4261 event pairs, 69 based on Foata normal form. 4/933 useless extension candidates. Maximal degree in co-relation 5038. Up to 390 conditions per place. [2023-08-29 23:55:47,940 INFO L137 encePairwiseOnDemand]: 177/182 looper letters, 135 selfloop transitions, 74 changer transitions 0/209 dead transitions. [2023-08-29 23:55:47,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 209 transitions, 2457 flow [2023-08-29 23:55:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:55:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:55:47,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 423 transitions. [2023-08-29 23:55:47,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46483516483516485 [2023-08-29 23:55:47,943 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 423 transitions. [2023-08-29 23:55:47,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 423 transitions. [2023-08-29 23:55:47,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:47,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 423 transitions. [2023-08-29 23:55:47,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.6) internal successors, (423), 5 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:47,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:47,945 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:47,946 INFO L175 Difference]: Start difference. First operand has 127 places, 163 transitions, 1658 flow. Second operand 5 states and 423 transitions. [2023-08-29 23:55:47,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 209 transitions, 2457 flow [2023-08-29 23:55:47,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 209 transitions, 1982 flow, removed 220 selfloop flow, removed 17 redundant places. [2023-08-29 23:55:47,976 INFO L231 Difference]: Finished difference. Result has 104 places, 162 transitions, 1450 flow [2023-08-29 23:55:47,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1450, PETRI_PLACES=104, PETRI_TRANSITIONS=162} [2023-08-29 23:55:47,976 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2023-08-29 23:55:47,976 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 162 transitions, 1450 flow [2023-08-29 23:55:47,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.4) internal successors, (392), 5 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:47,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:47,977 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:55:47,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 23:55:47,977 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:55:47,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:47,978 INFO L85 PathProgramCache]: Analyzing trace with hash 245937960, now seen corresponding path program 2 times [2023-08-29 23:55:47,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:55:47,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869853434] [2023-08-29 23:55:47,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:47,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:55:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:48,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:55:48,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869853434] [2023-08-29 23:55:48,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869853434] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:55:48,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925986165] [2023-08-29 23:55:48,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:55:48,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:55:48,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:55:48,902 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 23:55:48,904 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 23:55:49,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:55:49,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:55:49,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-29 23:55:49,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:49,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:55:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:50,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925986165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:55:50,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:55:50,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-29 23:55:50,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421818281] [2023-08-29 23:55:50,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:55:50,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:55:50,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:55:50,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:55:50,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:55:51,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 182 [2023-08-29 23:55:51,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 162 transitions, 1450 flow. Second operand has 24 states, 24 states have (on average 72.08333333333333) internal successors, (1730), 24 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:51,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:51,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 182 [2023-08-29 23:55:51,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:59,149 INFO L130 PetriNetUnfolder]: 1129/2013 cut-off events. [2023-08-29 23:55:59,149 INFO L131 PetriNetUnfolder]: For 22176/22192 co-relation queries the response was YES. [2023-08-29 23:55:59,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10057 conditions, 2013 events. 1129/2013 cut-off events. For 22176/22192 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11265 event pairs, 2 based on Foata normal form. 24/2031 useless extension candidates. Maximal degree in co-relation 10022. Up to 435 conditions per place. [2023-08-29 23:55:59,162 INFO L137 encePairwiseOnDemand]: 174/182 looper letters, 239 selfloop transitions, 241 changer transitions 94/577 dead transitions. [2023-08-29 23:55:59,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 577 transitions, 5884 flow [2023-08-29 23:55:59,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-29 23:55:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-29 23:55:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3992 transitions. [2023-08-29 23:55:59,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41385030064275347 [2023-08-29 23:55:59,168 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3992 transitions. [2023-08-29 23:55:59,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3992 transitions. [2023-08-29 23:55:59,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:59,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3992 transitions. [2023-08-29 23:55:59,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 75.32075471698113) internal successors, (3992), 53 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:59,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 182.0) internal successors, (9828), 54 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:59,185 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 182.0) internal successors, (9828), 54 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:59,185 INFO L175 Difference]: Start difference. First operand has 104 places, 162 transitions, 1450 flow. Second operand 53 states and 3992 transitions. [2023-08-29 23:55:59,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 577 transitions, 5884 flow [2023-08-29 23:55:59,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 577 transitions, 5386 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-29 23:55:59,238 INFO L231 Difference]: Finished difference. Result has 168 places, 335 transitions, 3298 flow [2023-08-29 23:55:59,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=3298, PETRI_PLACES=168, PETRI_TRANSITIONS=335} [2023-08-29 23:55:59,239 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 137 predicate places. [2023-08-29 23:55:59,239 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 335 transitions, 3298 flow [2023-08-29 23:55:59,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 72.08333333333333) internal successors, (1730), 24 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:59,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:59,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:55:59,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:59,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:55:59,446 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:55:59,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:59,447 INFO L85 PathProgramCache]: Analyzing trace with hash 158858292, now seen corresponding path program 3 times [2023-08-29 23:55:59,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:55:59,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206304595] [2023-08-29 23:55:59,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:59,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:55:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:00,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:56:00,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206304595] [2023-08-29 23:56:00,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206304595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:56:00,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459775096] [2023-08-29 23:56:00,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:56:00,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:56:00,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:56:00,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:56:00,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 23:56:00,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-29 23:56:00,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:56:00,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-29 23:56:00,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:00,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:56:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:02,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459775096] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:56:02,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:56:02,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-29 23:56:02,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715299536] [2023-08-29 23:56:02,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:56:02,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-29 23:56:02,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:56:02,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-29 23:56:02,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2023-08-29 23:56:03,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-08-29 23:56:03,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 335 transitions, 3298 flow. Second operand has 28 states, 28 states have (on average 67.89285714285714) internal successors, (1901), 28 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:03,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:03,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-08-29 23:56:03,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:56:14,276 INFO L130 PetriNetUnfolder]: 2010/3599 cut-off events. [2023-08-29 23:56:14,276 INFO L131 PetriNetUnfolder]: For 39005/39005 co-relation queries the response was YES. [2023-08-29 23:56:14,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19256 conditions, 3599 events. 2010/3599 cut-off events. For 39005/39005 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22794 event pairs, 30 based on Foata normal form. 16/3613 useless extension candidates. Maximal degree in co-relation 19205. Up to 761 conditions per place. [2023-08-29 23:56:14,302 INFO L137 encePairwiseOnDemand]: 172/182 looper letters, 247 selfloop transitions, 657 changer transitions 82/986 dead transitions. [2023-08-29 23:56:14,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 986 transitions, 11644 flow [2023-08-29 23:56:14,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-08-29 23:56:14,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2023-08-29 23:56:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 6646 transitions. [2023-08-29 23:56:14,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884732288987608 [2023-08-29 23:56:14,309 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 6646 transitions. [2023-08-29 23:56:14,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 6646 transitions. [2023-08-29 23:56:14,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:14,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 6646 transitions. [2023-08-29 23:56:14,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 70.70212765957447) internal successors, (6646), 94 states have internal predecessors, (6646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:14,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 182.0) internal successors, (17290), 95 states have internal predecessors, (17290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:14,333 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 182.0) internal successors, (17290), 95 states have internal predecessors, (17290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:14,333 INFO L175 Difference]: Start difference. First operand has 168 places, 335 transitions, 3298 flow. Second operand 94 states and 6646 transitions. [2023-08-29 23:56:14,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 986 transitions, 11644 flow [2023-08-29 23:56:14,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 986 transitions, 10956 flow, removed 329 selfloop flow, removed 14 redundant places. [2023-08-29 23:56:14,464 INFO L231 Difference]: Finished difference. Result has 268 places, 726 transitions, 8686 flow [2023-08-29 23:56:14,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=3062, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=8686, PETRI_PLACES=268, PETRI_TRANSITIONS=726} [2023-08-29 23:56:14,465 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 237 predicate places. [2023-08-29 23:56:14,465 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 726 transitions, 8686 flow [2023-08-29 23:56:14,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 67.89285714285714) internal successors, (1901), 28 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:14,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:14,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:14,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 23:56:14,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-29 23:56:14,670 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:56:14,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:14,671 INFO L85 PathProgramCache]: Analyzing trace with hash 57270964, now seen corresponding path program 4 times [2023-08-29 23:56:14,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:56:14,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162385307] [2023-08-29 23:56:14,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:56:14,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:56:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:14,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:56:14,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162385307] [2023-08-29 23:56:14,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162385307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:56:14,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:56:14,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:56:14,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55360043] [2023-08-29 23:56:14,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:56:14,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:56:14,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:56:14,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:56:14,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:56:14,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 182 [2023-08-29 23:56:14,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 726 transitions, 8686 flow. Second operand has 5 states, 5 states have (on average 76.8) internal successors, (384), 5 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:14,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:14,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 182 [2023-08-29 23:56:14,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:56:15,524 INFO L130 PetriNetUnfolder]: 1964/3431 cut-off events. [2023-08-29 23:56:15,524 INFO L131 PetriNetUnfolder]: For 65976/65976 co-relation queries the response was YES. [2023-08-29 23:56:15,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21290 conditions, 3431 events. 1964/3431 cut-off events. For 65976/65976 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20834 event pairs, 54 based on Foata normal form. 46/3475 useless extension candidates. Maximal degree in co-relation 21217. Up to 2045 conditions per place. [2023-08-29 23:56:15,553 INFO L137 encePairwiseOnDemand]: 174/182 looper letters, 469 selfloop transitions, 425 changer transitions 0/894 dead transitions. [2023-08-29 23:56:15,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 894 transitions, 12382 flow [2023-08-29 23:56:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:56:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:56:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 714 transitions. [2023-08-29 23:56:15,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2023-08-29 23:56:15,555 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 714 transitions. [2023-08-29 23:56:15,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 714 transitions. [2023-08-29 23:56:15,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:15,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 714 transitions. [2023-08-29 23:56:15,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.33333333333333) internal successors, (714), 9 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:15,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 182.0) internal successors, (1820), 10 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:15,558 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 182.0) internal successors, (1820), 10 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:15,558 INFO L175 Difference]: Start difference. First operand has 268 places, 726 transitions, 8686 flow. Second operand 9 states and 714 transitions. [2023-08-29 23:56:15,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 894 transitions, 12382 flow [2023-08-29 23:56:15,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 894 transitions, 11445 flow, removed 200 selfloop flow, removed 25 redundant places. [2023-08-29 23:56:15,876 INFO L231 Difference]: Finished difference. Result has 248 places, 819 transitions, 10436 flow [2023-08-29 23:56:15,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=7823, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10436, PETRI_PLACES=248, PETRI_TRANSITIONS=819} [2023-08-29 23:56:15,877 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 217 predicate places. [2023-08-29 23:56:15,877 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 819 transitions, 10436 flow [2023-08-29 23:56:15,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.8) internal successors, (384), 5 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:15,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:15,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:15,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 23:56:15,878 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:56:15,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:15,878 INFO L85 PathProgramCache]: Analyzing trace with hash 761517560, now seen corresponding path program 5 times [2023-08-29 23:56:15,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:56:15,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861825456] [2023-08-29 23:56:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:56:15,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:56:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:17,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:56:17,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861825456] [2023-08-29 23:56:17,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861825456] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:56:17,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088897308] [2023-08-29 23:56:17,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:56:17,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:56:17,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:56:17,117 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:56:17,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 23:56:17,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-29 23:56:17,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:56:17,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-29 23:56:17,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:17,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:56:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:19,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088897308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:56:19,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:56:19,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-29 23:56:19,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292770712] [2023-08-29 23:56:19,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:56:19,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 23:56:19,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:56:19,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 23:56:19,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2023-08-29 23:56:20,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-08-29 23:56:20,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 819 transitions, 10436 flow. Second operand has 25 states, 25 states have (on average 68.08) internal successors, (1702), 25 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:20,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:20,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-08-29 23:56:20,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:56:35,014 INFO L130 PetriNetUnfolder]: 2758/4879 cut-off events. [2023-08-29 23:56:35,014 INFO L131 PetriNetUnfolder]: For 89549/89549 co-relation queries the response was YES. [2023-08-29 23:56:35,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32554 conditions, 4879 events. 2758/4879 cut-off events. For 89549/89549 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 32240 event pairs, 18 based on Foata normal form. 18/4897 useless extension candidates. Maximal degree in co-relation 32487. Up to 1561 conditions per place. [2023-08-29 23:56:35,049 INFO L137 encePairwiseOnDemand]: 173/182 looper letters, 488 selfloop transitions, 704 changer transitions 117/1309 dead transitions. [2023-08-29 23:56:35,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1309 transitions, 19185 flow [2023-08-29 23:56:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-29 23:56:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-29 23:56:35,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3699 transitions. [2023-08-29 23:56:35,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3908495350803043 [2023-08-29 23:56:35,053 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3699 transitions. [2023-08-29 23:56:35,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3699 transitions. [2023-08-29 23:56:35,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:35,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3699 transitions. [2023-08-29 23:56:35,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 71.13461538461539) internal successors, (3699), 52 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:35,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 182.0) internal successors, (9646), 53 states have internal predecessors, (9646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:35,064 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 182.0) internal successors, (9646), 53 states have internal predecessors, (9646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:35,064 INFO L175 Difference]: Start difference. First operand has 248 places, 819 transitions, 10436 flow. Second operand 52 states and 3699 transitions. [2023-08-29 23:56:35,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1309 transitions, 19185 flow [2023-08-29 23:56:35,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 1309 transitions, 18893 flow, removed 84 selfloop flow, removed 5 redundant places. [2023-08-29 23:56:35,600 INFO L231 Difference]: Finished difference. Result has 319 places, 1034 transitions, 15520 flow [2023-08-29 23:56:35,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=10282, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=15520, PETRI_PLACES=319, PETRI_TRANSITIONS=1034} [2023-08-29 23:56:35,601 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 288 predicate places. [2023-08-29 23:56:35,601 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 1034 transitions, 15520 flow [2023-08-29 23:56:35,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 68.08) internal successors, (1702), 25 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:35,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:35,602 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:35,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-29 23:56:35,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-29 23:56:35,804 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:56:35,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:35,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1766521832, now seen corresponding path program 6 times [2023-08-29 23:56:35,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:56:35,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284641652] [2023-08-29 23:56:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:56:35,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:56:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:36,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:56:36,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284641652] [2023-08-29 23:56:36,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284641652] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:56:36,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809592889] [2023-08-29 23:56:36,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:56:36,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:56:36,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:56:36,433 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:56:36,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 23:56:36,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-29 23:56:36,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:56:36,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-29 23:56:36,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:37,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:56:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:38,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809592889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:56:38,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:56:38,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2023-08-29 23:56:38,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789072821] [2023-08-29 23:56:38,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:56:38,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 23:56:38,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:56:38,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 23:56:38,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2023-08-29 23:56:38,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-08-29 23:56:38,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 1034 transitions, 15520 flow. Second operand has 30 states, 30 states have (on average 67.9) internal successors, (2037), 30 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:38,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:38,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-08-29 23:56:38,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:56:51,557 INFO L130 PetriNetUnfolder]: 3078/5478 cut-off events. [2023-08-29 23:56:51,557 INFO L131 PetriNetUnfolder]: For 96127/96127 co-relation queries the response was YES. [2023-08-29 23:56:51,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38841 conditions, 5478 events. 3078/5478 cut-off events. For 96127/96127 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 37132 event pairs, 1 based on Foata normal form. 27/5505 useless extension candidates. Maximal degree in co-relation 38751. Up to 1553 conditions per place. [2023-08-29 23:56:51,607 INFO L137 encePairwiseOnDemand]: 173/182 looper letters, 308 selfloop transitions, 1045 changer transitions 150/1503 dead transitions. [2023-08-29 23:56:51,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1503 transitions, 24276 flow [2023-08-29 23:56:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-29 23:56:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-29 23:56:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4485 transitions. [2023-08-29 23:56:51,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2023-08-29 23:56:51,612 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4485 transitions. [2023-08-29 23:56:51,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4485 transitions. [2023-08-29 23:56:51,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:51,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4485 transitions. [2023-08-29 23:56:51,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 71.19047619047619) internal successors, (4485), 63 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:51,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 182.0) internal successors, (11648), 64 states have internal predecessors, (11648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:51,624 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 182.0) internal successors, (11648), 64 states have internal predecessors, (11648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:51,624 INFO L175 Difference]: Start difference. First operand has 319 places, 1034 transitions, 15520 flow. Second operand 63 states and 4485 transitions. [2023-08-29 23:56:51,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1503 transitions, 24276 flow [2023-08-29 23:56:52,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1503 transitions, 23669 flow, removed 281 selfloop flow, removed 20 redundant places. [2023-08-29 23:56:52,379 INFO L231 Difference]: Finished difference. Result has 367 places, 1221 transitions, 21367 flow [2023-08-29 23:56:52,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=15204, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1034, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=867, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=21367, PETRI_PLACES=367, PETRI_TRANSITIONS=1221} [2023-08-29 23:56:52,379 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 336 predicate places. [2023-08-29 23:56:52,380 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 1221 transitions, 21367 flow [2023-08-29 23:56:52,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 67.9) internal successors, (2037), 30 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:52,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:52,380 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:52,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:56:52,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:56:52,584 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:56:52,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:52,585 INFO L85 PathProgramCache]: Analyzing trace with hash -521172902, now seen corresponding path program 7 times [2023-08-29 23:56:52,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:56:52,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291800542] [2023-08-29 23:56:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:56:52,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:56:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:53,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:56:53,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291800542] [2023-08-29 23:56:53,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291800542] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:56:53,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008986375] [2023-08-29 23:56:53,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:56:53,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:56:53,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:56:53,068 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:56:53,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 23:56:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:53,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-29 23:56:53,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:53,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:56:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:54,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008986375] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:56:54,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:56:54,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-29 23:56:54,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574101789] [2023-08-29 23:56:54,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:56:54,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 23:56:54,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:56:54,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 23:56:54,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-08-29 23:56:55,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 182 [2023-08-29 23:56:55,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1221 transitions, 21367 flow. Second operand has 25 states, 25 states have (on average 72.0) internal successors, (1800), 25 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:55,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:55,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 182 [2023-08-29 23:56:55,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:10,917 INFO L130 PetriNetUnfolder]: 3692/6537 cut-off events. [2023-08-29 23:57:10,917 INFO L131 PetriNetUnfolder]: For 123068/123080 co-relation queries the response was YES. [2023-08-29 23:57:10,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52463 conditions, 6537 events. 3692/6537 cut-off events. For 123068/123080 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 45537 event pairs, 10 based on Foata normal form. 35/6570 useless extension candidates. Maximal degree in co-relation 52368. Up to 1990 conditions per place. [2023-08-29 23:57:10,984 INFO L137 encePairwiseOnDemand]: 174/182 looper letters, 564 selfloop transitions, 1019 changer transitions 211/1799 dead transitions. [2023-08-29 23:57:10,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1799 transitions, 33991 flow [2023-08-29 23:57:10,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-08-29 23:57:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-08-29 23:57:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4958 transitions. [2023-08-29 23:57:10,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41275391275391277 [2023-08-29 23:57:10,989 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4958 transitions. [2023-08-29 23:57:10,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4958 transitions. [2023-08-29 23:57:10,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:10,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4958 transitions. [2023-08-29 23:57:10,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 75.12121212121212) internal successors, (4958), 66 states have internal predecessors, (4958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:11,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 182.0) internal successors, (12194), 67 states have internal predecessors, (12194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:11,001 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 182.0) internal successors, (12194), 67 states have internal predecessors, (12194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:11,001 INFO L175 Difference]: Start difference. First operand has 367 places, 1221 transitions, 21367 flow. Second operand 66 states and 4958 transitions. [2023-08-29 23:57:11,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1799 transitions, 33991 flow [2023-08-29 23:57:12,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1799 transitions, 32418 flow, removed 412 selfloop flow, removed 21 redundant places. [2023-08-29 23:57:12,421 INFO L231 Difference]: Finished difference. Result has 429 places, 1412 transitions, 28156 flow [2023-08-29 23:57:12,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=20492, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=28156, PETRI_PLACES=429, PETRI_TRANSITIONS=1412} [2023-08-29 23:57:12,422 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 398 predicate places. [2023-08-29 23:57:12,422 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 1412 transitions, 28156 flow [2023-08-29 23:57:12,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 72.0) internal successors, (1800), 25 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:12,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:12,422 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:57:12,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:57:12,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-29 23:57:12,627 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:57:12,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:12,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1417186328, now seen corresponding path program 8 times [2023-08-29 23:57:12,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:57:12,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38531002] [2023-08-29 23:57:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:57:12,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:57:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:13,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:57:13,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38531002] [2023-08-29 23:57:13,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38531002] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:57:13,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668250622] [2023-08-29 23:57:13,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:57:13,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:57:13,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:57:13,099 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:57:13,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 23:57:13,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:57:13,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:57:13,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 23:57:13,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:13,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:57:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:14,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668250622] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:57:14,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:57:14,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-29 23:57:14,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236875440] [2023-08-29 23:57:14,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:57:14,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:57:14,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:57:14,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:57:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:57:14,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-08-29 23:57:14,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 1412 transitions, 28156 flow. Second operand has 24 states, 24 states have (on average 68.04166666666667) internal successors, (1633), 24 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:14,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:14,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-08-29 23:57:14,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:31,002 INFO L130 PetriNetUnfolder]: 5154/9180 cut-off events. [2023-08-29 23:57:31,002 INFO L131 PetriNetUnfolder]: For 156124/156124 co-relation queries the response was YES. [2023-08-29 23:57:31,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77538 conditions, 9180 events. 5154/9180 cut-off events. For 156124/156124 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 67730 event pairs, 164 based on Foata normal form. 53/9233 useless extension candidates. Maximal degree in co-relation 77423. Up to 2699 conditions per place. [2023-08-29 23:57:31,097 INFO L137 encePairwiseOnDemand]: 172/182 looper letters, 915 selfloop transitions, 1251 changer transitions 258/2424 dead transitions. [2023-08-29 23:57:31,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 2424 transitions, 50161 flow [2023-08-29 23:57:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-08-29 23:57:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-08-29 23:57:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6050 transitions. [2023-08-29 23:57:31,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39107950872656755 [2023-08-29 23:57:31,102 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6050 transitions. [2023-08-29 23:57:31,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6050 transitions. [2023-08-29 23:57:31,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:57:31,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6050 transitions. [2023-08-29 23:57:31,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 71.17647058823529) internal successors, (6050), 85 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:31,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 182.0) internal successors, (15652), 86 states have internal predecessors, (15652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:31,116 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 182.0) internal successors, (15652), 86 states have internal predecessors, (15652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:31,116 INFO L175 Difference]: Start difference. First operand has 429 places, 1412 transitions, 28156 flow. Second operand 85 states and 6050 transitions. [2023-08-29 23:57:31,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 2424 transitions, 50161 flow [2023-08-29 23:57:33,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 2424 transitions, 49413 flow, removed 265 selfloop flow, removed 25 redundant places. [2023-08-29 23:57:33,688 INFO L231 Difference]: Finished difference. Result has 524 places, 1929 transitions, 43625 flow [2023-08-29 23:57:33,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=27637, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=43625, PETRI_PLACES=524, PETRI_TRANSITIONS=1929} [2023-08-29 23:57:33,689 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 493 predicate places. [2023-08-29 23:57:33,689 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 1929 transitions, 43625 flow [2023-08-29 23:57:33,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.04166666666667) internal successors, (1633), 24 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:33,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:57:33,689 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:57:33,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:57:33,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-29 23:57:33,893 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:57:33,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:57:33,894 INFO L85 PathProgramCache]: Analyzing trace with hash -454296388, now seen corresponding path program 9 times [2023-08-29 23:57:33,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:57:33,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607125137] [2023-08-29 23:57:33,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:57:33,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:57:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:57:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:35,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:57:35,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607125137] [2023-08-29 23:57:35,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607125137] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:57:35,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678065552] [2023-08-29 23:57:35,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:57:35,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:57:35,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:57:35,361 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:57:35,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-29 23:57:35,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-29 23:57:35,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:57:35,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-29 23:57:35,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:57:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:36,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:57:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:57:39,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678065552] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:57:39,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:57:39,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 29 [2023-08-29 23:57:39,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87485257] [2023-08-29 23:57:39,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:57:39,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-29 23:57:39,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:57:39,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-29 23:57:39,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2023-08-29 23:57:39,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-08-29 23:57:39,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 1929 transitions, 43625 flow. Second operand has 31 states, 31 states have (on average 67.90322580645162) internal successors, (2105), 31 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:39,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:39,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-08-29 23:57:39,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:02,907 INFO L130 PetriNetUnfolder]: 5426/9523 cut-off events. [2023-08-29 23:58:02,907 INFO L131 PetriNetUnfolder]: For 227354/227354 co-relation queries the response was YES. [2023-08-29 23:58:03,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90801 conditions, 9523 events. 5426/9523 cut-off events. For 227354/227354 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 69788 event pairs, 1 based on Foata normal form. 12/9535 useless extension candidates. Maximal degree in co-relation 90640. Up to 2435 conditions per place. [2023-08-29 23:58:03,052 INFO L137 encePairwiseOnDemand]: 172/182 looper letters, 253 selfloop transitions, 2211 changer transitions 98/2562 dead transitions. [2023-08-29 23:58:03,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 2562 transitions, 60314 flow [2023-08-29 23:58:03,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-29 23:58:03,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-29 23:58:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5313 transitions. [2023-08-29 23:58:03,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892307692307692 [2023-08-29 23:58:03,058 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5313 transitions. [2023-08-29 23:58:03,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5313 transitions. [2023-08-29 23:58:03,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:03,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5313 transitions. [2023-08-29 23:58:03,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 70.84) internal successors, (5313), 75 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:03,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 182.0) internal successors, (13832), 76 states have internal predecessors, (13832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:03,072 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 182.0) internal successors, (13832), 76 states have internal predecessors, (13832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:03,072 INFO L175 Difference]: Start difference. First operand has 524 places, 1929 transitions, 43625 flow. Second operand 75 states and 5313 transitions. [2023-08-29 23:58:03,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 2562 transitions, 60314 flow [2023-08-29 23:58:07,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 2562 transitions, 59194 flow, removed 408 selfloop flow, removed 43 redundant places. [2023-08-29 23:58:07,285 INFO L231 Difference]: Finished difference. Result has 543 places, 2323 transitions, 58205 flow [2023-08-29 23:58:07,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=42953, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1825, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=58205, PETRI_PLACES=543, PETRI_TRANSITIONS=2323} [2023-08-29 23:58:07,287 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 512 predicate places. [2023-08-29 23:58:07,287 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 2323 transitions, 58205 flow [2023-08-29 23:58:07,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 67.90322580645162) internal successors, (2105), 31 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:07,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:07,288 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:58:07,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:58:07,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:58:07,493 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:58:07,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:07,493 INFO L85 PathProgramCache]: Analyzing trace with hash 813578442, now seen corresponding path program 10 times [2023-08-29 23:58:07,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:58:07,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048647058] [2023-08-29 23:58:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:07,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:58:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:08,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:58:08,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048647058] [2023-08-29 23:58:08,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048647058] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:58:08,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203534341] [2023-08-29 23:58:08,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:58:08,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:58:08,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:58:08,445 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:58:08,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-29 23:58:08,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:58:08,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:58:08,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-29 23:58:08,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:09,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:58:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:12,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203534341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:58:12,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:58:12,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 28 [2023-08-29 23:58:12,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953267507] [2023-08-29 23:58:12,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:58:12,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 23:58:12,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:58:12,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 23:58:12,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2023-08-29 23:58:12,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-08-29 23:58:12,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 2323 transitions, 58205 flow. Second operand has 30 states, 30 states have (on average 67.96666666666667) internal successors, (2039), 30 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:12,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:58:12,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-08-29 23:58:12,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:58:49,055 INFO L130 PetriNetUnfolder]: 6143/10838 cut-off events. [2023-08-29 23:58:49,055 INFO L131 PetriNetUnfolder]: For 272491/272491 co-relation queries the response was YES. [2023-08-29 23:58:49,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112570 conditions, 10838 events. 6143/10838 cut-off events. For 272491/272491 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 81247 event pairs, 34 based on Foata normal form. 26/10864 useless extension candidates. Maximal degree in co-relation 112424. Up to 3982 conditions per place. [2023-08-29 23:58:49,213 INFO L137 encePairwiseOnDemand]: 172/182 looper letters, 1028 selfloop transitions, 1815 changer transitions 155/2998 dead transitions. [2023-08-29 23:58:49,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 2998 transitions, 77745 flow [2023-08-29 23:58:49,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-08-29 23:58:49,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-08-29 23:58:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 6430 transitions. [2023-08-29 23:58:49,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38823813549088276 [2023-08-29 23:58:49,220 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 6430 transitions. [2023-08-29 23:58:49,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 6430 transitions. [2023-08-29 23:58:49,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:58:49,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 6430 transitions. [2023-08-29 23:58:49,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 70.65934065934066) internal successors, (6430), 91 states have internal predecessors, (6430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:49,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 182.0) internal successors, (16744), 92 states have internal predecessors, (16744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:49,236 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 182.0) internal successors, (16744), 92 states have internal predecessors, (16744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:49,236 INFO L175 Difference]: Start difference. First operand has 543 places, 2323 transitions, 58205 flow. Second operand 91 states and 6430 transitions. [2023-08-29 23:58:49,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 2998 transitions, 77745 flow [2023-08-29 23:58:55,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 2998 transitions, 75576 flow, removed 1054 selfloop flow, removed 17 redundant places. [2023-08-29 23:58:55,384 INFO L231 Difference]: Finished difference. Result has 630 places, 2588 transitions, 69822 flow [2023-08-29 23:58:55,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=57241, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1548, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=69822, PETRI_PLACES=630, PETRI_TRANSITIONS=2588} [2023-08-29 23:58:55,386 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 599 predicate places. [2023-08-29 23:58:55,386 INFO L495 AbstractCegarLoop]: Abstraction has has 630 places, 2588 transitions, 69822 flow [2023-08-29 23:58:55,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 67.96666666666667) internal successors, (2039), 30 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:58:55,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:58:55,387 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:58:55,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:58:55,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:58:55,591 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:58:55,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:58:55,591 INFO L85 PathProgramCache]: Analyzing trace with hash -27053838, now seen corresponding path program 11 times [2023-08-29 23:58:55,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:58:55,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039013370] [2023-08-29 23:58:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:58:55,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:58:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:58:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:56,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:58:56,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039013370] [2023-08-29 23:58:56,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039013370] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:58:56,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485957695] [2023-08-29 23:58:56,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:58:56,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:58:56,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:58:56,699 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:58:56,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-29 23:58:56,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-29 23:58:56,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:58:56,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-29 23:58:56,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:58:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:57,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:58:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:58:59,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485957695] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:58:59,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:58:59,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 30 [2023-08-29 23:58:59,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888643349] [2023-08-29 23:58:59,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:58:59,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-29 23:58:59,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:58:59,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-29 23:58:59,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2023-08-29 23:59:00,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-08-29 23:59:00,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 630 places, 2588 transitions, 69822 flow. Second operand has 32 states, 32 states have (on average 67.84375) internal successors, (2171), 32 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:00,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:00,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-08-29 23:59:00,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:42,995 INFO L130 PetriNetUnfolder]: 7007/12396 cut-off events. [2023-08-29 23:59:42,995 INFO L131 PetriNetUnfolder]: For 287055/287055 co-relation queries the response was YES. [2023-08-29 23:59:43,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132320 conditions, 12396 events. 7007/12396 cut-off events. For 287055/287055 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 95217 event pairs, 2 based on Foata normal form. 20/12416 useless extension candidates. Maximal degree in co-relation 132159. Up to 2856 conditions per place. [2023-08-29 23:59:43,175 INFO L137 encePairwiseOnDemand]: 171/182 looper letters, 247 selfloop transitions, 3081 changer transitions 112/3440 dead transitions. [2023-08-29 23:59:43,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 722 places, 3440 transitions, 94362 flow [2023-08-29 23:59:43,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-08-29 23:59:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2023-08-29 23:59:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 7449 transitions. [2023-08-29 23:59:43,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861185983827493 [2023-08-29 23:59:43,181 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 7449 transitions. [2023-08-29 23:59:43,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 7449 transitions. [2023-08-29 23:59:43,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:43,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 7449 transitions. [2023-08-29 23:59:43,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 70.27358490566037) internal successors, (7449), 106 states have internal predecessors, (7449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:43,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 182.0) internal successors, (19474), 107 states have internal predecessors, (19474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:43,197 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 182.0) internal successors, (19474), 107 states have internal predecessors, (19474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:43,198 INFO L175 Difference]: Start difference. First operand has 630 places, 2588 transitions, 69822 flow. Second operand 106 states and 7449 transitions. [2023-08-29 23:59:43,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 722 places, 3440 transitions, 94362 flow [2023-08-29 23:59:50,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 3440 transitions, 93780 flow, removed 246 selfloop flow, removed 22 redundant places. [2023-08-29 23:59:50,283 INFO L231 Difference]: Finished difference. Result has 716 places, 3170 transitions, 92665 flow [2023-08-29 23:59:50,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=69415, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=92665, PETRI_PLACES=716, PETRI_TRANSITIONS=3170} [2023-08-29 23:59:50,285 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 685 predicate places. [2023-08-29 23:59:50,285 INFO L495 AbstractCegarLoop]: Abstraction has has 716 places, 3170 transitions, 92665 flow [2023-08-29 23:59:50,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 67.84375) internal successors, (2171), 32 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:50,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:50,285 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:50,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-29 23:59:50,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-29 23:59:50,486 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:59:50,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:50,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1293874632, now seen corresponding path program 12 times [2023-08-29 23:59:50,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:59:50,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422115944] [2023-08-29 23:59:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:50,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:59:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:50,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:59:50,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422115944] [2023-08-29 23:59:50,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422115944] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:59:50,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701580882] [2023-08-29 23:59:50,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:59:50,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:59:50,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:59:50,959 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:59:50,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-29 23:59:51,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-29 23:59:51,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:59:51,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-29 23:59:51,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:51,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:59:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:53,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701580882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:59:53,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:59:53,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-29 23:59:53,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071046880] [2023-08-29 23:59:53,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:59:53,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-29 23:59:53,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:59:53,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-29 23:59:53,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2023-08-29 23:59:53,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 182 [2023-08-29 23:59:53,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 716 places, 3170 transitions, 92665 flow. Second operand has 28 states, 28 states have (on average 69.10714285714286) internal successors, (1935), 28 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:53,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:53,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 182 [2023-08-29 23:59:53,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:00:36,294 INFO L130 PetriNetUnfolder]: 8407/14903 cut-off events. [2023-08-30 00:00:36,294 INFO L131 PetriNetUnfolder]: For 374432/374432 co-relation queries the response was YES. [2023-08-30 00:00:36,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172875 conditions, 14903 events. 8407/14903 cut-off events. For 374432/374432 co-relation queries the response was YES. Maximal size of possible extension queue 856. Compared 117919 event pairs, 127 based on Foata normal form. 29/14932 useless extension candidates. Maximal degree in co-relation 172706. Up to 3993 conditions per place. [2023-08-30 00:00:36,552 INFO L137 encePairwiseOnDemand]: 171/182 looper letters, 1171 selfloop transitions, 2843 changer transitions 190/4204 dead transitions. [2023-08-30 00:00:36,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 4204 transitions, 126866 flow [2023-08-30 00:00:36,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-08-30 00:00:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2023-08-30 00:00:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 6603 transitions. [2023-08-30 00:00:36,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943502150023889 [2023-08-30 00:00:36,557 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 6603 transitions. [2023-08-30 00:00:36,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 6603 transitions. [2023-08-30 00:00:36,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:00:36,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 6603 transitions. [2023-08-30 00:00:36,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 71.77173913043478) internal successors, (6603), 92 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:36,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 182.0) internal successors, (16926), 93 states have internal predecessors, (16926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:36,571 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 182.0) internal successors, (16926), 93 states have internal predecessors, (16926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:36,572 INFO L175 Difference]: Start difference. First operand has 716 places, 3170 transitions, 92665 flow. Second operand 92 states and 6603 transitions. [2023-08-30 00:00:36,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 4204 transitions, 126866 flow [2023-08-30 00:00:49,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 771 places, 4204 transitions, 125564 flow, removed 606 selfloop flow, removed 22 redundant places. [2023-08-30 00:00:49,675 INFO L231 Difference]: Finished difference. Result has 823 places, 3820 transitions, 119050 flow [2023-08-30 00:00:49,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=91842, PETRI_DIFFERENCE_MINUEND_PLACES=680, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=119050, PETRI_PLACES=823, PETRI_TRANSITIONS=3820} [2023-08-30 00:00:49,677 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 792 predicate places. [2023-08-30 00:00:49,677 INFO L495 AbstractCegarLoop]: Abstraction has has 823 places, 3820 transitions, 119050 flow [2023-08-30 00:00:49,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 69.10714285714286) internal successors, (1935), 28 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:49,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:00:49,678 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:00:49,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:00:49,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 00:00:49,878 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:00:49,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:00:49,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1190431434, now seen corresponding path program 13 times [2023-08-30 00:00:49,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:00:49,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085572166] [2023-08-30 00:00:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:00:49,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:00:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:00:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 00:00:50,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:00:50,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085572166] [2023-08-30 00:00:50,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085572166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:00:50,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:00:50,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:00:50,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557696989] [2023-08-30 00:00:50,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:00:50,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:00:50,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:00:50,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:00:50,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:00:50,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 182 [2023-08-30 00:00:50,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 823 places, 3820 transitions, 119050 flow. Second operand has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:50,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:00:50,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 182 [2023-08-30 00:00:50,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:01:03,411 INFO L130 PetriNetUnfolder]: 7940/13829 cut-off events. [2023-08-30 00:01:03,411 INFO L131 PetriNetUnfolder]: For 413390/413390 co-relation queries the response was YES. [2023-08-30 00:01:03,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174351 conditions, 13829 events. 7940/13829 cut-off events. For 413390/413390 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 106523 event pairs, 1784 based on Foata normal form. 116/13945 useless extension candidates. Maximal degree in co-relation 174137. Up to 8057 conditions per place. [2023-08-30 00:01:03,694 INFO L137 encePairwiseOnDemand]: 177/182 looper letters, 2795 selfloop transitions, 1082 changer transitions 0/3877 dead transitions. [2023-08-30 00:01:03,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 809 places, 3877 transitions, 128582 flow [2023-08-30 00:01:03,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:01:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:01:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2023-08-30 00:01:03,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2023-08-30 00:01:03,695 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2023-08-30 00:01:03,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2023-08-30 00:01:03,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:01:03,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2023-08-30 00:01:03,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:03,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:03,697 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:03,697 INFO L175 Difference]: Start difference. First operand has 823 places, 3820 transitions, 119050 flow. Second operand 5 states and 416 transitions. [2023-08-30 00:01:03,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 809 places, 3877 transitions, 128582 flow [2023-08-30 00:01:18,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 3877 transitions, 127860 flow, removed 330 selfloop flow, removed 24 redundant places. [2023-08-30 00:01:18,436 INFO L231 Difference]: Finished difference. Result has 787 places, 3815 transitions, 121765 flow [2023-08-30 00:01:18,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=118186, PETRI_DIFFERENCE_MINUEND_PLACES=781, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121765, PETRI_PLACES=787, PETRI_TRANSITIONS=3815} [2023-08-30 00:01:18,439 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 756 predicate places. [2023-08-30 00:01:18,439 INFO L495 AbstractCegarLoop]: Abstraction has has 787 places, 3815 transitions, 121765 flow [2023-08-30 00:01:18,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:18,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:01:18,440 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:01:18,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 00:01:18,440 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:01:18,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:01:18,440 INFO L85 PathProgramCache]: Analyzing trace with hash -931906834, now seen corresponding path program 14 times [2023-08-30 00:01:18,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:01:18,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604870655] [2023-08-30 00:01:18,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:01:18,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:01:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:01:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:01:18,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:01:18,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604870655] [2023-08-30 00:01:18,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604870655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:01:18,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064113998] [2023-08-30 00:01:18,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:01:18,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:01:18,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:01:18,948 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:01:18,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 00:01:19,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:01:19,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:01:19,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 00:01:19,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:01:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:01:19,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:01:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:01:20,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064113998] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:01:20,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:01:20,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-08-30 00:01:20,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716302293] [2023-08-30 00:01:20,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:01:20,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 00:01:20,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:01:20,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 00:01:20,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 00:01:21,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-08-30 00:01:21,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 3815 transitions, 121765 flow. Second operand has 34 states, 34 states have (on average 67.73529411764706) internal successors, (2303), 34 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:21,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:01:21,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-08-30 00:01:21,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:01:50,434 INFO L130 PetriNetUnfolder]: 8607/15008 cut-off events. [2023-08-30 00:01:50,435 INFO L131 PetriNetUnfolder]: For 486900/486900 co-relation queries the response was YES. [2023-08-30 00:01:50,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191354 conditions, 15008 events. 8607/15008 cut-off events. For 486900/486900 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 117269 event pairs, 42 based on Foata normal form. 54/15062 useless extension candidates. Maximal degree in co-relation 191152. Up to 3556 conditions per place. [2023-08-30 00:01:50,737 INFO L137 encePairwiseOnDemand]: 172/182 looper letters, 104 selfloop transitions, 2815 changer transitions 1434/4353 dead transitions. [2023-08-30 00:01:50,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 4353 transitions, 144930 flow [2023-08-30 00:01:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-30 00:01:50,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-30 00:01:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4494 transitions. [2023-08-30 00:01:50,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3858173076923077 [2023-08-30 00:01:50,741 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4494 transitions. [2023-08-30 00:01:50,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4494 transitions. [2023-08-30 00:01:50,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:01:50,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4494 transitions. [2023-08-30 00:01:50,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 70.21875) internal successors, (4494), 64 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:50,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 182.0) internal successors, (11830), 65 states have internal predecessors, (11830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:50,751 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 182.0) internal successors, (11830), 65 states have internal predecessors, (11830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:01:50,751 INFO L175 Difference]: Start difference. First operand has 787 places, 3815 transitions, 121765 flow. Second operand 64 states and 4494 transitions. [2023-08-30 00:01:50,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 850 places, 4353 transitions, 144930 flow [2023-08-30 00:02:06,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 848 places, 4353 transitions, 144619 flow, removed 152 selfloop flow, removed 2 redundant places. [2023-08-30 00:02:06,911 INFO L231 Difference]: Finished difference. Result has 854 places, 2854 transitions, 98552 flow [2023-08-30 00:02:06,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=121660, PETRI_DIFFERENCE_MINUEND_PLACES=785, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=98552, PETRI_PLACES=854, PETRI_TRANSITIONS=2854} [2023-08-30 00:02:06,915 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 823 predicate places. [2023-08-30 00:02:06,915 INFO L495 AbstractCegarLoop]: Abstraction has has 854 places, 2854 transitions, 98552 flow [2023-08-30 00:02:06,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 67.73529411764706) internal successors, (2303), 34 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:06,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:02:06,916 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:02:06,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 00:02:07,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:02:07,121 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:02:07,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:02:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1255571070, now seen corresponding path program 15 times [2023-08-30 00:02:07,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:02:07,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891296018] [2023-08-30 00:02:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:02:07,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:02:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:02:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:02:07,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:02:07,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891296018] [2023-08-30 00:02:07,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891296018] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:02:07,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278835487] [2023-08-30 00:02:07,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:02:07,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:02:07,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:02:07,257 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:02:07,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 00:02:07,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:02:07,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:02:07,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:02:07,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:02:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:02:07,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:02:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 00:02:07,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278835487] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:02:07,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:02:07,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 6] total 19 [2023-08-30 00:02:07,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229859881] [2023-08-30 00:02:07,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:02:07,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 00:02:07,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:02:07,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 00:02:07,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-08-30 00:02:07,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 182 [2023-08-30 00:02:07,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 854 places, 2854 transitions, 98552 flow. Second operand has 19 states, 19 states have (on average 73.57894736842105) internal successors, (1398), 19 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:07,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:02:07,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 182 [2023-08-30 00:02:07,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:02:14,484 INFO L130 PetriNetUnfolder]: 5166/8669 cut-off events. [2023-08-30 00:02:14,484 INFO L131 PetriNetUnfolder]: For 261128/261128 co-relation queries the response was YES. [2023-08-30 00:02:14,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124877 conditions, 8669 events. 5166/8669 cut-off events. For 261128/261128 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 59498 event pairs, 1 based on Foata normal form. 80/8749 useless extension candidates. Maximal degree in co-relation 124669. Up to 4273 conditions per place. [2023-08-30 00:02:14,623 INFO L137 encePairwiseOnDemand]: 173/182 looper letters, 0 selfloop transitions, 0 changer transitions 2801/2801 dead transitions. [2023-08-30 00:02:14,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 2801 transitions, 102081 flow [2023-08-30 00:02:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 00:02:14,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 00:02:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1043 transitions. [2023-08-30 00:02:14,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40934065934065933 [2023-08-30 00:02:14,624 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1043 transitions. [2023-08-30 00:02:14,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1043 transitions. [2023-08-30 00:02:14,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:02:14,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1043 transitions. [2023-08-30 00:02:14,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 74.5) internal successors, (1043), 14 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:14,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 182.0) internal successors, (2730), 15 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:14,627 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 182.0) internal successors, (2730), 15 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:14,627 INFO L175 Difference]: Start difference. First operand has 854 places, 2854 transitions, 98552 flow. Second operand 14 states and 1043 transitions. [2023-08-30 00:02:14,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 715 places, 2801 transitions, 102081 flow [2023-08-30 00:02:22,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 2801 transitions, 89056 flow, removed 320 selfloop flow, removed 64 redundant places. [2023-08-30 00:02:22,717 INFO L231 Difference]: Finished difference. Result has 651 places, 0 transitions, 0 flow [2023-08-30 00:02:22,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=82878, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2767, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=0, PETRI_PLACES=651, PETRI_TRANSITIONS=0} [2023-08-30 00:02:22,718 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 620 predicate places. [2023-08-30 00:02:22,719 INFO L495 AbstractCegarLoop]: Abstraction has has 651 places, 0 transitions, 0 flow [2023-08-30 00:02:22,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 73.57894736842105) internal successors, (1398), 19 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:22,721 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 12 remaining) [2023-08-30 00:02:22,721 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 12 remaining) [2023-08-30 00:02:22,721 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2023-08-30 00:02:22,722 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-08-30 00:02:22,722 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2023-08-30 00:02:22,722 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2023-08-30 00:02:22,722 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 12 remaining) [2023-08-30 00:02:22,722 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 12 remaining) [2023-08-30 00:02:22,722 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2023-08-30 00:02:22,724 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2023-08-30 00:02:22,724 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 12 remaining) [2023-08-30 00:02:22,724 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 12 remaining) [2023-08-30 00:02:22,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:02:22,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:02:22,925 INFO L445 BasicCegarLoop]: Path program histogram: [15, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 00:02:22,927 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 00:02:22,927 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 00:02:22,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 12:02:22 BasicIcfg [2023-08-30 00:02:22,930 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 00:02:22,930 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 00:02:22,930 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 00:02:22,931 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 00:02:22,931 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:55:38" (3/4) ... [2023-08-30 00:02:22,933 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 00:02:22,938 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-08-30 00:02:22,938 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-08-30 00:02:22,942 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2023-08-30 00:02:22,943 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-30 00:02:22,943 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-30 00:02:22,943 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-30 00:02:22,969 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 00:02:22,969 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 00:02:22,970 INFO L158 Benchmark]: Toolchain (without parser) took 405384.82ms. Allocated memory was 73.4MB in the beginning and 4.2GB in the end (delta: 4.1GB). Free memory was 49.1MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 3.0GB. Max. memory is 16.1GB. [2023-08-30 00:02:22,970 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 58.7MB. Free memory is still 36.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:02:22,970 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.81ms. Allocated memory is still 73.4MB. Free memory was 49.0MB in the beginning and 37.7MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-30 00:02:22,970 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.92ms. Allocated memory is still 73.4MB. Free memory was 37.7MB in the beginning and 54.2MB in the end (delta: -16.5MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2023-08-30 00:02:22,971 INFO L158 Benchmark]: Boogie Preprocessor took 34.67ms. Allocated memory is still 73.4MB. Free memory was 54.2MB in the beginning and 53.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:02:22,971 INFO L158 Benchmark]: RCFGBuilder took 316.64ms. Allocated memory is still 73.4MB. Free memory was 53.0MB in the beginning and 36.9MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-08-30 00:02:22,971 INFO L158 Benchmark]: TraceAbstraction took 404771.83ms. Allocated memory was 73.4MB in the beginning and 4.2GB in the end (delta: 4.1GB). Free memory was 36.3MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 3.9GB. Max. memory is 16.1GB. [2023-08-30 00:02:22,971 INFO L158 Benchmark]: Witness Printer took 39.22ms. Allocated memory is still 4.2GB. Free memory was 1.2GB in the beginning and 1.2GB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 00:02:22,975 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 58.7MB. Free memory is still 36.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 178.81ms. Allocated memory is still 73.4MB. Free memory was 49.0MB in the beginning and 37.7MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.92ms. Allocated memory is still 73.4MB. Free memory was 37.7MB in the beginning and 54.2MB in the end (delta: -16.5MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.67ms. Allocated memory is still 73.4MB. Free memory was 54.2MB in the beginning and 53.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 316.64ms. Allocated memory is still 73.4MB. Free memory was 53.0MB in the beginning and 36.9MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 404771.83ms. Allocated memory was 73.4MB in the beginning and 4.2GB in the end (delta: 4.1GB). Free memory was 36.3MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 3.9GB. Max. memory is 16.1GB. * Witness Printer took 39.22ms. Allocated memory is still 4.2GB. Free memory was 1.2GB in the beginning and 1.2GB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.3s, 90 PlacesBefore, 31 PlacesAfterwards, 89 TransitionsBefore, 26 TransitionsAfterwards, 532 CoEnabledTransitionPairs, 7 FixpointIterations, 55 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 87 TotalNumberOfCompositions, 987 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 820, independent: 791, independent conditional: 0, independent unconditional: 791, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 273, independent: 269, independent conditional: 0, independent unconditional: 269, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 820, independent: 522, independent conditional: 0, independent unconditional: 522, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 273, unknown conditional: 0, unknown unconditional: 273] , Statistics on independence cache: Total cache size (in pairs): 51, Positive cache size: 48, Positive conditional cache size: 0, Positive unconditional cache size: 48, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 95]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 78]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 107 locations, 12 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: 404.7s, OverallIterations: 25, TraceHistogramMax: 3, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 361.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5901 SdHoareTripleChecker+Valid, 45.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5560 mSDsluCounter, 1124 SdHoareTripleChecker+Invalid, 42.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1046 mSDsCounter, 1146 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 22478 IncrementalHoareTripleChecker+Invalid, 23624 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1146 mSolverCounterUnsat, 78 mSDtfsCounter, 22478 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1443 GetRequests, 312 SyntacticMatches, 14 SemanticMatches, 1117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33222 ImplicationChecksByTransitivity, 181.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=121765occurred in iteration=23, InterpolantAutomatonStates: 960, 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, 1.5s SatisfiabilityAnalysisTime, 35.2s InterpolantComputationTime, 676 NumberOfCodeBlocks, 670 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 880 ConstructedInterpolants, 0 QuantifiedInterpolants, 33596 SizeOfPredicates, 130 NumberOfNonLiveVariables, 2152 ConjunctsInSsa, 407 ConjunctsInUnsatCore, 53 InterpolantComputations, 12 PerfectInterpolantSequences, 47/296 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 - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-30 00:02:23,005 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: TRUE