./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure3.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-figure3.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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --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 [2023-08-30 00:05:34,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:05:34,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:05:34,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:05:34,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:05:34,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:05:34,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:05:34,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:05:34,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:05:34,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:05:34,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:05:34,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:05:34,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:05:34,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:05:34,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:05:34,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:05:34,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:05:34,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:05:34,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:05:34,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:05:34,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:05:34,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:05:34,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:05:34,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:05:34,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:05:34,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:05:34,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:05:34,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:05:34,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:05:34,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:05:34,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:05:34,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:05:34,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:05:34,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:05:34,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:05:34,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:05:34,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:05:34,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:05:34,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:05:34,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:05:34,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:05:34,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:05:34,240 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:05:34,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:05:34,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:05:34,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:05:34,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:05:34,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:05:34,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:05:34,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:05:34,244 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:05:34,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:05:34,245 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:05:34,245 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:05:34,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:05:34,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:05:34,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:05:34,246 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:05:34,246 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:05:34,247 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:05:34,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:05:34,247 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:05:34,247 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:05:34,247 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:05:34,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:05:34,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:05:34,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:05:34,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:05:34,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:05:34,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:05:34,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:05:34,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:05:34,249 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:05:34,249 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:05:34,250 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:05:34,250 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:05:34,250 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:05:34,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:05:34,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:05:34,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:05:34,599 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:05:34,599 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:05:34,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-08-30 00:05:35,898 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:05:36,130 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:05:36,131 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-08-30 00:05:36,138 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/013097746/12977483127449c39636633198b1649f/FLAGa147f39bd [2023-08-30 00:05:36,154 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/013097746/12977483127449c39636633198b1649f [2023-08-30 00:05:36,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:05:36,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:05:36,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:05:36,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:05:36,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:05:36,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:05:36" (1/1) ... [2023-08-30 00:05:36,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75cddc50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:36, skipping insertion in model container [2023-08-30 00:05:36,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:05:36" (1/1) ... [2023-08-30 00:05:36,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:05:36,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:05:36,367 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-figure3.wvr.c[2121,2134] [2023-08-30 00:05:36,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:05:36,383 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:05:36,409 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-figure3.wvr.c[2121,2134] [2023-08-30 00:05:36,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:05:36,424 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:05:36,424 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:05:36,430 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:05:36,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:36 WrapperNode [2023-08-30 00:05:36,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:05:36,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:05:36,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:05:36,433 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:05:36,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:36" (1/1) ... [2023-08-30 00:05:36,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:36" (1/1) ... [2023-08-30 00:05:36,481 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-08-30 00:05:36,482 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:05:36,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:05:36,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:05:36,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:05:36,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:36" (1/1) ... [2023-08-30 00:05:36,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:36" (1/1) ... [2023-08-30 00:05:36,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:36" (1/1) ... [2023-08-30 00:05:36,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:36" (1/1) ... [2023-08-30 00:05:36,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:36" (1/1) ... [2023-08-30 00:05:36,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:36" (1/1) ... [2023-08-30 00:05:36,521 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:36" (1/1) ... [2023-08-30 00:05:36,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:36" (1/1) ... [2023-08-30 00:05:36,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:05:36,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:05:36,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:05:36,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:05:36,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:36" (1/1) ... [2023-08-30 00:05:36,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:05:36,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:36,563 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:05:36,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:05:36,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:05:36,607 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:05:36,607 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:05:36,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:05:36,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:05:36,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 00:05:36,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:05:36,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 00:05:36,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:05:36,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:05:36,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:05:36,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:05:36,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 00:05:36,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:05:36,611 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:05:36,729 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:05:36,730 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:05:36,904 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:05:36,929 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:05:36,929 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 00:05:36,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:05:36 BoogieIcfgContainer [2023-08-30 00:05:36,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:05:36,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:05:36,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:05:36,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:05:36,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:05:36" (1/3) ... [2023-08-30 00:05:36,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505aa114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:05:36, skipping insertion in model container [2023-08-30 00:05:36,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:36" (2/3) ... [2023-08-30 00:05:36,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505aa114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:05:36, skipping insertion in model container [2023-08-30 00:05:36,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:05:36" (3/3) ... [2023-08-30 00:05:36,940 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-08-30 00:05:36,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:05:36,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 00:05:36,955 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:05:37,056 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 00:05:37,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 94 transitions, 204 flow [2023-08-30 00:05:37,132 INFO L130 PetriNetUnfolder]: 6/92 cut-off events. [2023-08-30 00:05:37,133 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:05:37,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 92 events. 6/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-08-30 00:05:37,145 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 94 transitions, 204 flow [2023-08-30 00:05:37,149 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 88 transitions, 188 flow [2023-08-30 00:05:37,158 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:05:37,170 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 88 transitions, 188 flow [2023-08-30 00:05:37,177 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 88 transitions, 188 flow [2023-08-30 00:05:37,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 188 flow [2023-08-30 00:05:37,218 INFO L130 PetriNetUnfolder]: 6/88 cut-off events. [2023-08-30 00:05:37,219 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:05:37,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 88 events. 6/88 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-08-30 00:05:37,222 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2023-08-30 00:05:40,030 INFO L134 LiptonReduction]: Checked pairs total: 779 [2023-08-30 00:05:40,030 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-30 00:05:40,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:05:40,049 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;@719c1917, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:05:40,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 00:05:40,051 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 00:05:40,051 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:05:40,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:40,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 00:05:40,053 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)] === [2023-08-30 00:05:40,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:40,056 INFO L85 PathProgramCache]: Analyzing trace with hash 371, now seen corresponding path program 1 times [2023-08-30 00:05:40,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:40,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128458396] [2023-08-30 00:05:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:40,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:40,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:40,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128458396] [2023-08-30 00:05:40,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128458396] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:40,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:40,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 00:05:40,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913674609] [2023-08-30 00:05:40,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:40,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 00:05:40,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:40,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 00:05:40,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 00:05:40,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 00:05:40,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:40,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:40,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 00:05:40,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:40,274 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2023-08-30 00:05:40,274 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 00:05:40,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 520 event pairs, 42 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-08-30 00:05:40,278 INFO L137 encePairwiseOnDemand]: 178/181 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-30 00:05:40,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-30 00:05:40,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 00:05:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 00:05:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 190 transitions. [2023-08-30 00:05:40,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5248618784530387 [2023-08-30 00:05:40,295 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 190 transitions. [2023-08-30 00:05:40,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 190 transitions. [2023-08-30 00:05:40,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:40,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 190 transitions. [2023-08-30 00:05:40,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 00:05:40,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states 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 00:05:40,312 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states 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 00:05:40,314 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 190 transitions. [2023-08-30 00:05:40,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-30 00:05:40,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 00:05:40,319 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-30 00:05:40,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-30 00:05:40,325 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 00:05:40,325 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-30 00:05:40,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:40,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:40,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:05:40,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 00:05:40,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:40,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:40,340 INFO L85 PathProgramCache]: Analyzing trace with hash 362648, now seen corresponding path program 1 times [2023-08-30 00:05:40,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:40,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860187350] [2023-08-30 00:05:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:40,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:40,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:40,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860187350] [2023-08-30 00:05:40,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860187350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:40,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:40,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:05:40,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154828006] [2023-08-30 00:05:40,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:40,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:05:40,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:40,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:05:40,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:05:40,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 181 [2023-08-30 00:05:40,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 00:05:40,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:40,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 181 [2023-08-30 00:05:40,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:40,644 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2023-08-30 00:05:40,644 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:05:40,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 462 event pairs, 39 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-08-30 00:05:40,646 INFO L137 encePairwiseOnDemand]: 178/181 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-30 00:05:40,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-30 00:05:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:05:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:05:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2023-08-30 00:05:40,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714548802946593 [2023-08-30 00:05:40,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 256 transitions. [2023-08-30 00:05:40,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 256 transitions. [2023-08-30 00:05:40,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:40,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 256 transitions. [2023-08-30 00:05:40,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 00:05:40,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 00:05:40,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 00:05:40,652 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 256 transitions. [2023-08-30 00:05:40,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-30 00:05:40,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 00:05:40,653 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-30 00:05:40,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, 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=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-30 00:05:40,654 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 00:05:40,654 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-30 00:05:40,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 00:05:40,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:40,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:05:40,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 00:05:40,655 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:40,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:40,655 INFO L85 PathProgramCache]: Analyzing trace with hash 362647, now seen corresponding path program 1 times [2023-08-30 00:05:40,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:40,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989854324] [2023-08-30 00:05:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:40,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:40,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:40,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989854324] [2023-08-30 00:05:40,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989854324] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:40,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:40,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:05:40,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396020778] [2023-08-30 00:05:40,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:40,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:05:40,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:40,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:05:40,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:05:40,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 181 [2023-08-30 00:05:40,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 00:05:40,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:40,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 181 [2023-08-30 00:05:40,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:40,778 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2023-08-30 00:05:40,778 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:05:40,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 404 event pairs, 36 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-08-30 00:05:40,779 INFO L137 encePairwiseOnDemand]: 178/181 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-30 00:05:40,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-30 00:05:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:05:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:05:40,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-08-30 00:05:40,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567219152854515 [2023-08-30 00:05:40,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-08-30 00:05:40,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-08-30 00:05:40,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:40,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-08-30 00:05:40,783 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) [2023-08-30 00:05:40,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 00:05:40,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 00:05:40,784 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 242 transitions. [2023-08-30 00:05:40,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-30 00:05:40,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:05:40,785 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-30 00:05:40,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, 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=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-30 00:05:40,786 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 00:05:40,786 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-30 00:05:40,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 00:05:40,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:40,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:05:40,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 00:05:40,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:40,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:40,788 INFO L85 PathProgramCache]: Analyzing trace with hash 348510888, now seen corresponding path program 1 times [2023-08-30 00:05:40,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:40,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301245967] [2023-08-30 00:05:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:40,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:40,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:40,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301245967] [2023-08-30 00:05:40,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301245967] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:40,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:40,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:05:40,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741741899] [2023-08-30 00:05:40,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:40,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:05:40,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:40,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:05:40,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:05:40,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 181 [2023-08-30 00:05:40,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 00:05:40,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:40,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 181 [2023-08-30 00:05:40,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:40,927 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2023-08-30 00:05:40,928 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:05:40,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 291 event pairs, 27 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-08-30 00:05:40,929 INFO L137 encePairwiseOnDemand]: 179/181 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-30 00:05:40,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-30 00:05:40,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:05:40,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:05:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2023-08-30 00:05:40,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4198895027624309 [2023-08-30 00:05:40,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2023-08-30 00:05:40,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2023-08-30 00:05:40,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:40,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2023-08-30 00:05:40,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 00:05:40,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 00:05:40,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 00:05:40,933 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 228 transitions. [2023-08-30 00:05:40,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-30 00:05:40,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:05:40,934 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-30 00:05:40,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-30 00:05:40,935 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 00:05:40,935 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-30 00:05:40,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 00:05:40,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:40,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:05:40,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 00:05:40,936 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:40,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:40,936 INFO L85 PathProgramCache]: Analyzing trace with hash 348510889, now seen corresponding path program 1 times [2023-08-30 00:05:40,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:40,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692258417] [2023-08-30 00:05:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:40,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:41,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:41,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692258417] [2023-08-30 00:05:41,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692258417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:41,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:41,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:05:41,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324242648] [2023-08-30 00:05:41,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:41,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:05:41,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:41,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:05:41,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:05:41,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 181 [2023-08-30 00:05:41,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states 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 00:05:41,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:41,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 181 [2023-08-30 00:05:41,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:41,118 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2023-08-30 00:05:41,118 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:05:41,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 172 event pairs, 18 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-08-30 00:05:41,119 INFO L137 encePairwiseOnDemand]: 179/181 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-30 00:05:41,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-30 00:05:41,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:05:41,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:05:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-08-30 00:05:41,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45119705340699817 [2023-08-30 00:05:41,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-08-30 00:05:41,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-08-30 00:05:41,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:41,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-08-30 00:05:41,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 00:05:41,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 00:05:41,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 00:05:41,123 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 245 transitions. [2023-08-30 00:05:41,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-30 00:05:41,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:05:41,124 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-30 00:05:41,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-30 00:05:41,125 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 00:05:41,125 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-30 00:05:41,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states 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 00:05:41,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:41,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:41,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 00:05:41,126 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)] === [2023-08-30 00:05:41,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:41,127 INFO L85 PathProgramCache]: Analyzing trace with hash -363417635, now seen corresponding path program 1 times [2023-08-30 00:05:41,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:41,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057603717] [2023-08-30 00:05:41,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:41,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:41,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:41,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057603717] [2023-08-30 00:05:41,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057603717] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:41,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:41,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:05:41,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550713160] [2023-08-30 00:05:41,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:41,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:05:41,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:41,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:05:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:05:41,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 181 [2023-08-30 00:05:41,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states 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 00:05:41,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:41,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 181 [2023-08-30 00:05:41,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:41,260 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2023-08-30 00:05:41,260 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:05:41,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 94 events. 49/94 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 273 event pairs, 13 based on Foata normal form. 1/67 useless extension candidates. Maximal degree in co-relation 194. Up to 65 conditions per place. [2023-08-30 00:05:41,261 INFO L137 encePairwiseOnDemand]: 177/181 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-08-30 00:05:41,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 104 flow [2023-08-30 00:05:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:05:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:05:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-08-30 00:05:41,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4972375690607735 [2023-08-30 00:05:41,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-08-30 00:05:41,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-08-30 00:05:41,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:41,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-08-30 00:05:41,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 00:05:41,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 00:05:41,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 00:05:41,266 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 270 transitions. [2023-08-30 00:05:41,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 104 flow [2023-08-30 00:05:41,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:05:41,267 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 52 flow [2023-08-30 00:05:41,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2023-08-30 00:05:41,267 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-08-30 00:05:41,268 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 52 flow [2023-08-30 00:05:41,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states 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 00:05:41,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:41,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:41,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 00:05:41,268 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)] === [2023-08-30 00:05:41,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:41,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1993736684, now seen corresponding path program 1 times [2023-08-30 00:05:41,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:41,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441111631] [2023-08-30 00:05:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:41,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:41,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:41,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441111631] [2023-08-30 00:05:41,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441111631] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:41,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:41,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:05:41,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526265823] [2023-08-30 00:05:41,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:41,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:05:41,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:41,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:05:41,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:05:41,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:05:41,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 52 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) [2023-08-30 00:05:41,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:41,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:05:41,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:41,481 INFO L130 PetriNetUnfolder]: 68/137 cut-off events. [2023-08-30 00:05:41,481 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 00:05:41,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 137 events. 68/137 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 419 event pairs, 24 based on Foata normal form. 2/139 useless extension candidates. Maximal degree in co-relation 320. Up to 74 conditions per place. [2023-08-30 00:05:41,483 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 19 selfloop transitions, 4 changer transitions 17/40 dead transitions. [2023-08-30 00:05:41,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 40 transitions, 189 flow [2023-08-30 00:05:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:05:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:05:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2023-08-30 00:05:41,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44659300184162065 [2023-08-30 00:05:41,485 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2023-08-30 00:05:41,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2023-08-30 00:05:41,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:41,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2023-08-30 00:05:41,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states 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 00:05:41,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:41,489 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:41,489 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 52 flow. Second operand 6 states and 485 transitions. [2023-08-30 00:05:41,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 40 transitions, 189 flow [2023-08-30 00:05:41,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 40 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:05:41,490 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 79 flow [2023-08-30 00:05:41,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=79, PETRI_PLACES=31, PETRI_TRANSITIONS=18} [2023-08-30 00:05:41,491 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-30 00:05:41,491 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 79 flow [2023-08-30 00:05:41,492 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) [2023-08-30 00:05:41,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:41,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:41,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 00:05:41,492 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)] === [2023-08-30 00:05:41,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:41,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1088757098, now seen corresponding path program 2 times [2023-08-30 00:05:41,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:41,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696899925] [2023-08-30 00:05:41,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:41,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:41,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:41,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696899925] [2023-08-30 00:05:41,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696899925] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:41,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729335822] [2023-08-30 00:05:41,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:05:41,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:41,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:41,581 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) [2023-08-30 00:05:41,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 00:05:41,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:05:41,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:41,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:05:41,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:41,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:41,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729335822] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:41,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:05:41,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-30 00:05:41,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625578777] [2023-08-30 00:05:41,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:41,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:05:41,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:41,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:05:41,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:05:41,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 181 [2023-08-30 00:05:41,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 18 transitions, 79 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states 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 00:05:41,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:41,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 181 [2023-08-30 00:05:41,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:41,881 INFO L130 PetriNetUnfolder]: 49/92 cut-off events. [2023-08-30 00:05:41,882 INFO L131 PetriNetUnfolder]: For 58/64 co-relation queries the response was YES. [2023-08-30 00:05:41,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 92 events. 49/92 cut-off events. For 58/64 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 217 event pairs, 3 based on Foata normal form. 12/104 useless extension candidates. Maximal degree in co-relation 294. Up to 62 conditions per place. [2023-08-30 00:05:41,883 INFO L137 encePairwiseOnDemand]: 177/181 looper letters, 24 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2023-08-30 00:05:41,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 173 flow [2023-08-30 00:05:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:05:41,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:05:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 335 transitions. [2023-08-30 00:05:41,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.462707182320442 [2023-08-30 00:05:41,885 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 335 transitions. [2023-08-30 00:05:41,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 335 transitions. [2023-08-30 00:05:41,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:41,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 335 transitions. [2023-08-30 00:05:41,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:41,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states 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 00:05:41,887 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states 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 00:05:41,887 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 79 flow. Second operand 4 states and 335 transitions. [2023-08-30 00:05:41,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 173 flow [2023-08-30 00:05:41,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 157 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 00:05:41,890 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 93 flow [2023-08-30 00:05:41,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-08-30 00:05:41,890 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-30 00:05:41,890 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 93 flow [2023-08-30 00:05:41,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states 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 00:05:41,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:41,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:41,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 00:05:42,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:42,097 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)] === [2023-08-30 00:05:42,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:42,098 INFO L85 PathProgramCache]: Analyzing trace with hash -438644134, now seen corresponding path program 3 times [2023-08-30 00:05:42,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:42,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851027995] [2023-08-30 00:05:42,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:42,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:42,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:42,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851027995] [2023-08-30 00:05:42,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851027995] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:42,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:42,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:05:42,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373145170] [2023-08-30 00:05:42,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:42,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:05:42,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:42,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:05:42,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:05:42,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 181 [2023-08-30 00:05:42,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states 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 00:05:42,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:42,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 181 [2023-08-30 00:05:42,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:42,315 INFO L130 PetriNetUnfolder]: 67/132 cut-off events. [2023-08-30 00:05:42,316 INFO L131 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2023-08-30 00:05:42,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 132 events. 67/132 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 21 based on Foata normal form. 6/138 useless extension candidates. Maximal degree in co-relation 437. Up to 75 conditions per place. [2023-08-30 00:05:42,319 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 29 selfloop transitions, 6 changer transitions 2/37 dead transitions. [2023-08-30 00:05:42,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 230 flow [2023-08-30 00:05:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:05:42,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:05:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 408 transitions. [2023-08-30 00:05:42,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450828729281768 [2023-08-30 00:05:42,321 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 408 transitions. [2023-08-30 00:05:42,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 408 transitions. [2023-08-30 00:05:42,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:42,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 408 transitions. [2023-08-30 00:05:42,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 00:05:42,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states 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 00:05:42,325 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states 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 00:05:42,325 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 93 flow. Second operand 5 states and 408 transitions. [2023-08-30 00:05:42,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 230 flow [2023-08-30 00:05:42,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 225 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 00:05:42,329 INFO L231 Difference]: Finished difference. Result has 37 places, 22 transitions, 132 flow [2023-08-30 00:05:42,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=37, PETRI_TRANSITIONS=22} [2023-08-30 00:05:42,331 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-08-30 00:05:42,331 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 22 transitions, 132 flow [2023-08-30 00:05:42,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states 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 00:05:42,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:42,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:42,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 00:05:42,332 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)] === [2023-08-30 00:05:42,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:42,332 INFO L85 PathProgramCache]: Analyzing trace with hash 384552564, now seen corresponding path program 4 times [2023-08-30 00:05:42,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:42,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925270418] [2023-08-30 00:05:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:42,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:42,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:42,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925270418] [2023-08-30 00:05:42,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925270418] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:42,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748582868] [2023-08-30 00:05:42,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:05:42,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:42,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:42,451 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) [2023-08-30 00:05:42,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 00:05:42,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:05:42,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:42,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:05:42,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:42,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:42,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748582868] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:42,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:42,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-08-30 00:05:42,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114291499] [2023-08-30 00:05:42,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:42,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 00:05:42,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:42,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 00:05:42,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 00:05:42,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:05:42,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 22 transitions, 132 flow. Second operand has 7 states, 7 states have (on average 77.42857142857143) internal successors, (542), 7 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:42,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:42,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:05:42,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:42,791 INFO L130 PetriNetUnfolder]: 82/157 cut-off events. [2023-08-30 00:05:42,791 INFO L131 PetriNetUnfolder]: For 423/423 co-relation queries the response was YES. [2023-08-30 00:05:42,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 651 conditions, 157 events. 82/157 cut-off events. For 423/423 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 447 event pairs, 26 based on Foata normal form. 6/163 useless extension candidates. Maximal degree in co-relation 639. Up to 104 conditions per place. [2023-08-30 00:05:42,793 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 33 selfloop transitions, 11 changer transitions 2/46 dead transitions. [2023-08-30 00:05:42,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 334 flow [2023-08-30 00:05:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:05:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:05:42,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 562 transitions. [2023-08-30 00:05:42,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435674822415154 [2023-08-30 00:05:42,795 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 562 transitions. [2023-08-30 00:05:42,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 562 transitions. [2023-08-30 00:05:42,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:42,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 562 transitions. [2023-08-30 00:05:42,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.28571428571429) internal successors, (562), 7 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 00:05:42,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 181.0) internal successors, (1448), 8 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states 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 00:05:42,800 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 181.0) internal successors, (1448), 8 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states 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 00:05:42,800 INFO L175 Difference]: Start difference. First operand has 37 places, 22 transitions, 132 flow. Second operand 7 states and 562 transitions. [2023-08-30 00:05:42,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 334 flow [2023-08-30 00:05:42,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 317 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 00:05:42,803 INFO L231 Difference]: Finished difference. Result has 42 places, 26 transitions, 180 flow [2023-08-30 00:05:42,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=180, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2023-08-30 00:05:42,806 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-08-30 00:05:42,806 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 180 flow [2023-08-30 00:05:42,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.42857142857143) internal successors, (542), 7 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:42,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:42,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:42,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:43,012 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,SelfDestructingSolverStorable9 [2023-08-30 00:05:43,013 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)] === [2023-08-30 00:05:43,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:43,014 INFO L85 PathProgramCache]: Analyzing trace with hash 309110386, now seen corresponding path program 5 times [2023-08-30 00:05:43,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:43,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700889386] [2023-08-30 00:05:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:43,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:43,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:43,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700889386] [2023-08-30 00:05:43,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700889386] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:43,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370533146] [2023-08-30 00:05:43,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:05:43,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:43,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:43,091 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) [2023-08-30 00:05:43,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 00:05:43,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:05:43,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:43,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:05:43,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:43,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:43,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370533146] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:43,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:43,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 00:05:43,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011594563] [2023-08-30 00:05:43,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:43,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:05:43,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:43,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:05:43,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:05:43,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:05:43,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 26 transitions, 180 flow. Second operand has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states 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 00:05:43,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:43,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:05:43,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:43,378 INFO L130 PetriNetUnfolder]: 76/143 cut-off events. [2023-08-30 00:05:43,378 INFO L131 PetriNetUnfolder]: For 487/487 co-relation queries the response was YES. [2023-08-30 00:05:43,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 143 events. 76/143 cut-off events. For 487/487 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 378 event pairs, 21 based on Foata normal form. 6/149 useless extension candidates. Maximal degree in co-relation 613. Up to 87 conditions per place. [2023-08-30 00:05:43,380 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 25 selfloop transitions, 11 changer transitions 2/38 dead transitions. [2023-08-30 00:05:43,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 313 flow [2023-08-30 00:05:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:05:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:05:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 403 transitions. [2023-08-30 00:05:43,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453038674033149 [2023-08-30 00:05:43,382 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 403 transitions. [2023-08-30 00:05:43,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 403 transitions. [2023-08-30 00:05:43,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:43,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 403 transitions. [2023-08-30 00:05:43,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.6) internal successors, (403), 5 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 00:05:43,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states 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 00:05:43,386 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states 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 00:05:43,386 INFO L175 Difference]: Start difference. First operand has 42 places, 26 transitions, 180 flow. Second operand 5 states and 403 transitions. [2023-08-30 00:05:43,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 313 flow [2023-08-30 00:05:43,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 298 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 00:05:43,390 INFO L231 Difference]: Finished difference. Result has 45 places, 26 transitions, 190 flow [2023-08-30 00:05:43,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=45, PETRI_TRANSITIONS=26} [2023-08-30 00:05:43,391 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-08-30 00:05:43,391 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 26 transitions, 190 flow [2023-08-30 00:05:43,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states 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 00:05:43,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:43,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:43,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:43,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:43,598 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)] === [2023-08-30 00:05:43,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:43,598 INFO L85 PathProgramCache]: Analyzing trace with hash -86748654, now seen corresponding path program 1 times [2023-08-30 00:05:43,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:43,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190119178] [2023-08-30 00:05:43,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:43,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:43,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:43,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190119178] [2023-08-30 00:05:43,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190119178] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:43,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187884102] [2023-08-30 00:05:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:43,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:43,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:43,724 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) [2023-08-30 00:05:43,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 00:05:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:43,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:05:43,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:43,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:43,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187884102] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:43,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:43,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 5 [2023-08-30 00:05:43,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887100169] [2023-08-30 00:05:43,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:43,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 00:05:43,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:43,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 00:05:43,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 00:05:43,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-08-30 00:05:43,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 26 transitions, 190 flow. Second operand has 7 states, 7 states have (on average 84.57142857142857) internal successors, (592), 7 states have internal predecessors, (592), 0 states have call successors, (0), 0 states 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 00:05:43,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:43,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-08-30 00:05:43,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:43,994 INFO L130 PetriNetUnfolder]: 122/230 cut-off events. [2023-08-30 00:05:43,994 INFO L131 PetriNetUnfolder]: For 644/658 co-relation queries the response was YES. [2023-08-30 00:05:43,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978 conditions, 230 events. 122/230 cut-off events. For 644/658 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 801 event pairs, 16 based on Foata normal form. 18/246 useless extension candidates. Maximal degree in co-relation 963. Up to 113 conditions per place. [2023-08-30 00:05:43,996 INFO L137 encePairwiseOnDemand]: 177/181 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2023-08-30 00:05:43,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 395 flow [2023-08-30 00:05:44,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:05:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:05:44,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 355 transitions. [2023-08-30 00:05:44,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4903314917127072 [2023-08-30 00:05:44,004 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 355 transitions. [2023-08-30 00:05:44,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 355 transitions. [2023-08-30 00:05:44,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:44,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 355 transitions. [2023-08-30 00:05:44,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 00:05:44,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states 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 00:05:44,009 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states 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 00:05:44,009 INFO L175 Difference]: Start difference. First operand has 45 places, 26 transitions, 190 flow. Second operand 4 states and 355 transitions. [2023-08-30 00:05:44,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 395 flow [2023-08-30 00:05:44,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 358 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 00:05:44,012 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 269 flow [2023-08-30 00:05:44,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2023-08-30 00:05:44,012 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-08-30 00:05:44,013 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 269 flow [2023-08-30 00:05:44,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.57142857142857) internal successors, (592), 7 states have internal predecessors, (592), 0 states have call successors, (0), 0 states 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 00:05:44,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:44,013 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:44,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 00:05:44,217 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 [2023-08-30 00:05:44,217 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)] === [2023-08-30 00:05:44,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:44,217 INFO L85 PathProgramCache]: Analyzing trace with hash -593314255, now seen corresponding path program 2 times [2023-08-30 00:05:44,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:44,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462338245] [2023-08-30 00:05:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:44,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:44,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:44,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462338245] [2023-08-30 00:05:44,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462338245] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:44,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087527433] [2023-08-30 00:05:44,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:05:44,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:44,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:44,357 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) [2023-08-30 00:05:44,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 00:05:44,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:05:44,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:44,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:05:44,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:44,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:44,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087527433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:44,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:44,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-30 00:05:44,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030017533] [2023-08-30 00:05:44,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:44,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:05:44,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:44,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:05:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:05:44,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:05:44,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 269 flow. Second operand has 14 states, 14 states have (on average 76.07142857142857) internal successors, (1065), 14 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states 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 00:05:44,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:44,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:05:44,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:45,463 INFO L130 PetriNetUnfolder]: 344/706 cut-off events. [2023-08-30 00:05:45,464 INFO L131 PetriNetUnfolder]: For 1635/1635 co-relation queries the response was YES. [2023-08-30 00:05:45,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2855 conditions, 706 events. 344/706 cut-off events. For 1635/1635 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3615 event pairs, 10 based on Foata normal form. 16/722 useless extension candidates. Maximal degree in co-relation 2839. Up to 239 conditions per place. [2023-08-30 00:05:45,469 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 110 selfloop transitions, 63 changer transitions 33/206 dead transitions. [2023-08-30 00:05:45,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 206 transitions, 1646 flow [2023-08-30 00:05:45,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 00:05:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 00:05:45,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2399 transitions. [2023-08-30 00:05:45,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441804788213628 [2023-08-30 00:05:45,477 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2399 transitions. [2023-08-30 00:05:45,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2399 transitions. [2023-08-30 00:05:45,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:45,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2399 transitions. [2023-08-30 00:05:45,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 79.96666666666667) internal successors, (2399), 30 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states 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 00:05:45,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 181.0) internal successors, (5611), 31 states have internal predecessors, (5611), 0 states have call successors, (0), 0 states 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 00:05:45,493 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 181.0) internal successors, (5611), 31 states have internal predecessors, (5611), 0 states have call successors, (0), 0 states 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 00:05:45,493 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 269 flow. Second operand 30 states and 2399 transitions. [2023-08-30 00:05:45,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 206 transitions, 1646 flow [2023-08-30 00:05:45,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 206 transitions, 1604 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-08-30 00:05:45,502 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 973 flow [2023-08-30 00:05:45,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=973, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2023-08-30 00:05:45,504 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2023-08-30 00:05:45,504 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 973 flow [2023-08-30 00:05:45,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 76.07142857142857) internal successors, (1065), 14 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states 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 00:05:45,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:45,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:45,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:45,713 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 [2023-08-30 00:05:45,714 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)] === [2023-08-30 00:05:45,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:45,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1208063949, now seen corresponding path program 3 times [2023-08-30 00:05:45,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:45,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842832889] [2023-08-30 00:05:45,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:45,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:45,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:45,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842832889] [2023-08-30 00:05:45,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842832889] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:45,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114807392] [2023-08-30 00:05:45,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:05:45,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:45,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:45,877 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) [2023-08-30 00:05:45,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 00:05:45,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 00:05:45,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:45,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:05:45,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:45,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:46,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114807392] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:46,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:46,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-08-30 00:05:46,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130804664] [2023-08-30 00:05:46,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:46,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:05:46,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:46,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:05:46,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:05:46,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:05:46,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 973 flow. Second operand has 12 states, 12 states have (on average 76.16666666666667) internal successors, (914), 12 states have internal predecessors, (914), 0 states have call successors, (0), 0 states 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 00:05:46,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:46,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:05:46,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:46,466 INFO L130 PetriNetUnfolder]: 319/640 cut-off events. [2023-08-30 00:05:46,466 INFO L131 PetriNetUnfolder]: For 4621/4621 co-relation queries the response was YES. [2023-08-30 00:05:46,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3596 conditions, 640 events. 319/640 cut-off events. For 4621/4621 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3107 event pairs, 35 based on Foata normal form. 18/658 useless extension candidates. Maximal degree in co-relation 3568. Up to 294 conditions per place. [2023-08-30 00:05:46,473 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 103 selfloop transitions, 35 changer transitions 0/138 dead transitions. [2023-08-30 00:05:46,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 138 transitions, 1616 flow [2023-08-30 00:05:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 00:05:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 00:05:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 809 transitions. [2023-08-30 00:05:46,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696132596685084 [2023-08-30 00:05:46,476 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 809 transitions. [2023-08-30 00:05:46,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 809 transitions. [2023-08-30 00:05:46,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:46,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 809 transitions. [2023-08-30 00:05:46,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 80.9) internal successors, (809), 10 states have internal predecessors, (809), 0 states have call successors, (0), 0 states 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 00:05:46,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 181.0) internal successors, (1991), 11 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states 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 00:05:46,481 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 181.0) internal successors, (1991), 11 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states 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 00:05:46,481 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 973 flow. Second operand 10 states and 809 transitions. [2023-08-30 00:05:46,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 138 transitions, 1616 flow [2023-08-30 00:05:46,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 138 transitions, 1229 flow, removed 156 selfloop flow, removed 7 redundant places. [2023-08-30 00:05:46,500 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 871 flow [2023-08-30 00:05:46,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=871, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2023-08-30 00:05:46,500 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2023-08-30 00:05:46,501 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 871 flow [2023-08-30 00:05:46,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 76.16666666666667) internal successors, (914), 12 states have internal predecessors, (914), 0 states have call successors, (0), 0 states 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 00:05:46,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:46,501 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:46,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:46,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:46,708 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)] === [2023-08-30 00:05:46,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:46,708 INFO L85 PathProgramCache]: Analyzing trace with hash 617588799, now seen corresponding path program 4 times [2023-08-30 00:05:46,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:46,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624923931] [2023-08-30 00:05:46,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:46,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:46,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:46,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624923931] [2023-08-30 00:05:46,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624923931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:46,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482358706] [2023-08-30 00:05:46,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:05:46,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:46,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:46,869 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) [2023-08-30 00:05:46,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 00:05:46,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:05:46,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:46,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:05:46,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:47,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:47,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482358706] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:47,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:47,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-30 00:05:47,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913029668] [2023-08-30 00:05:47,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:47,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:05:47,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:47,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:05:47,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:05:47,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:05:47,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 871 flow. Second operand has 14 states, 14 states have (on average 76.14285714285714) internal successors, (1066), 14 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states 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 00:05:47,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:47,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:05:47,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:47,755 INFO L130 PetriNetUnfolder]: 403/794 cut-off events. [2023-08-30 00:05:47,755 INFO L131 PetriNetUnfolder]: For 9150/9150 co-relation queries the response was YES. [2023-08-30 00:05:47,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4274 conditions, 794 events. 403/794 cut-off events. For 9150/9150 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4057 event pairs, 39 based on Foata normal form. 48/842 useless extension candidates. Maximal degree in co-relation 4246. Up to 350 conditions per place. [2023-08-30 00:05:47,765 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 126 selfloop transitions, 66 changer transitions 0/192 dead transitions. [2023-08-30 00:05:47,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 192 transitions, 1916 flow [2023-08-30 00:05:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 00:05:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 00:05:47,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1447 transitions. [2023-08-30 00:05:47,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44413750767341925 [2023-08-30 00:05:47,769 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1447 transitions. [2023-08-30 00:05:47,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1447 transitions. [2023-08-30 00:05:47,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:47,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1447 transitions. [2023-08-30 00:05:47,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 80.38888888888889) internal successors, (1447), 18 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states 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 00:05:47,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 181.0) internal successors, (3439), 19 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states 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 00:05:47,778 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 181.0) internal successors, (3439), 19 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states 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 00:05:47,778 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 871 flow. Second operand 18 states and 1447 transitions. [2023-08-30 00:05:47,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 192 transitions, 1916 flow [2023-08-30 00:05:47,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 192 transitions, 1769 flow, removed 55 selfloop flow, removed 4 redundant places. [2023-08-30 00:05:47,799 INFO L231 Difference]: Finished difference. Result has 106 places, 128 transitions, 1374 flow [2023-08-30 00:05:47,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1374, PETRI_PLACES=106, PETRI_TRANSITIONS=128} [2023-08-30 00:05:47,800 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2023-08-30 00:05:47,800 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 128 transitions, 1374 flow [2023-08-30 00:05:47,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 76.14285714285714) internal successors, (1066), 14 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states 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 00:05:47,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:47,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:47,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:48,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:48,008 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)] === [2023-08-30 00:05:48,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:48,008 INFO L85 PathProgramCache]: Analyzing trace with hash 56336925, now seen corresponding path program 5 times [2023-08-30 00:05:48,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:48,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998623285] [2023-08-30 00:05:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:48,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:48,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:48,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998623285] [2023-08-30 00:05:48,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998623285] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:48,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129863796] [2023-08-30 00:05:48,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:05:48,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:48,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:48,165 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) [2023-08-30 00:05:48,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 00:05:48,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:05:48,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:48,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:05:48,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:48,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:48,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129863796] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:48,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:48,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-30 00:05:48,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177034520] [2023-08-30 00:05:48,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:48,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:05:48,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:48,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:05:48,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:05:48,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:05:48,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 128 transitions, 1374 flow. Second operand has 14 states, 14 states have (on average 75.85714285714286) internal successors, (1062), 14 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 00:05:48,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:48,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:05:48,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:49,079 INFO L130 PetriNetUnfolder]: 486/967 cut-off events. [2023-08-30 00:05:49,080 INFO L131 PetriNetUnfolder]: For 19244/19244 co-relation queries the response was YES. [2023-08-30 00:05:49,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6158 conditions, 967 events. 486/967 cut-off events. For 19244/19244 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5290 event pairs, 22 based on Foata normal form. 30/997 useless extension candidates. Maximal degree in co-relation 6123. Up to 278 conditions per place. [2023-08-30 00:05:49,091 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 88 selfloop transitions, 105 changer transitions 5/198 dead transitions. [2023-08-30 00:05:49,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 198 transitions, 2299 flow [2023-08-30 00:05:49,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 00:05:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 00:05:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1042 transitions. [2023-08-30 00:05:49,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44283892902677435 [2023-08-30 00:05:49,095 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1042 transitions. [2023-08-30 00:05:49,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1042 transitions. [2023-08-30 00:05:49,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:49,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1042 transitions. [2023-08-30 00:05:49,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 80.15384615384616) internal successors, (1042), 13 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states 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 00:05:49,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 181.0) internal successors, (2534), 14 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states 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 00:05:49,102 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 181.0) internal successors, (2534), 14 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states 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 00:05:49,102 INFO L175 Difference]: Start difference. First operand has 106 places, 128 transitions, 1374 flow. Second operand 13 states and 1042 transitions. [2023-08-30 00:05:49,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 198 transitions, 2299 flow [2023-08-30 00:05:49,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 198 transitions, 2025 flow, removed 103 selfloop flow, removed 7 redundant places. [2023-08-30 00:05:49,146 INFO L231 Difference]: Finished difference. Result has 117 places, 153 transitions, 1824 flow [2023-08-30 00:05:49,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1824, PETRI_PLACES=117, PETRI_TRANSITIONS=153} [2023-08-30 00:05:49,147 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 88 predicate places. [2023-08-30 00:05:49,147 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 153 transitions, 1824 flow [2023-08-30 00:05:49,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 75.85714285714286) internal successors, (1062), 14 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 00:05:49,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:49,148 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:49,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:49,354 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,SelfDestructingSolverStorable15 [2023-08-30 00:05:49,354 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)] === [2023-08-30 00:05:49,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:49,355 INFO L85 PathProgramCache]: Analyzing trace with hash -398260725, now seen corresponding path program 6 times [2023-08-30 00:05:49,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:49,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143372727] [2023-08-30 00:05:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:49,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:49,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:49,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143372727] [2023-08-30 00:05:49,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143372727] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:49,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193105210] [2023-08-30 00:05:49,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:05:49,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:49,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:49,459 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) [2023-08-30 00:05:49,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 00:05:49,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 00:05:49,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:49,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:05:49,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:49,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:49,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193105210] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:49,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:49,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-30 00:05:49,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687408046] [2023-08-30 00:05:49,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:49,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 00:05:49,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:49,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 00:05:49,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-30 00:05:49,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:05:49,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 153 transitions, 1824 flow. Second operand has 15 states, 15 states have (on average 76.13333333333334) internal successors, (1142), 15 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states 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 00:05:49,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:49,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:05:49,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:50,666 INFO L130 PetriNetUnfolder]: 725/1434 cut-off events. [2023-08-30 00:05:50,667 INFO L131 PetriNetUnfolder]: For 43138/43138 co-relation queries the response was YES. [2023-08-30 00:05:50,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10246 conditions, 1434 events. 725/1434 cut-off events. For 43138/43138 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 8727 event pairs, 176 based on Foata normal form. 100/1534 useless extension candidates. Maximal degree in co-relation 10206. Up to 832 conditions per place. [2023-08-30 00:05:50,684 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 209 selfloop transitions, 125 changer transitions 3/337 dead transitions. [2023-08-30 00:05:50,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 337 transitions, 4433 flow [2023-08-30 00:05:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:05:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:05:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1931 transitions. [2023-08-30 00:05:50,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44452117863720075 [2023-08-30 00:05:50,688 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1931 transitions. [2023-08-30 00:05:50,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1931 transitions. [2023-08-30 00:05:50,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:50,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1931 transitions. [2023-08-30 00:05:50,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 80.45833333333333) internal successors, (1931), 24 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states 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 00:05:50,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 181.0) internal successors, (4525), 25 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states 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 00:05:50,698 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 181.0) internal successors, (4525), 25 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states 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 00:05:50,698 INFO L175 Difference]: Start difference. First operand has 117 places, 153 transitions, 1824 flow. Second operand 24 states and 1931 transitions. [2023-08-30 00:05:50,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 337 transitions, 4433 flow [2023-08-30 00:05:50,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 337 transitions, 4036 flow, removed 181 selfloop flow, removed 5 redundant places. [2023-08-30 00:05:50,822 INFO L231 Difference]: Finished difference. Result has 148 places, 223 transitions, 3199 flow [2023-08-30 00:05:50,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3199, PETRI_PLACES=148, PETRI_TRANSITIONS=223} [2023-08-30 00:05:50,823 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 119 predicate places. [2023-08-30 00:05:50,823 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 223 transitions, 3199 flow [2023-08-30 00:05:50,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 76.13333333333334) internal successors, (1142), 15 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states 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 00:05:50,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:50,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:50,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:51,030 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,SelfDestructingSolverStorable16 [2023-08-30 00:05:51,030 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)] === [2023-08-30 00:05:51,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:51,031 INFO L85 PathProgramCache]: Analyzing trace with hash 883114373, now seen corresponding path program 7 times [2023-08-30 00:05:51,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:51,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736878123] [2023-08-30 00:05:51,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:51,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:51,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:51,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736878123] [2023-08-30 00:05:51,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736878123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:51,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866218198] [2023-08-30 00:05:51,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:05:51,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:51,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:51,137 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) [2023-08-30 00:05:51,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 00:05:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:51,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:05:51,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:51,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:51,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866218198] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:51,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:51,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-30 00:05:51,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662065272] [2023-08-30 00:05:51,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:51,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:05:51,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:51,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:05:51,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:05:51,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:05:51,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 223 transitions, 3199 flow. Second operand has 14 states, 14 states have (on average 75.85714285714286) internal successors, (1062), 14 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 00:05:51,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:51,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:05:51,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:52,407 INFO L130 PetriNetUnfolder]: 860/1731 cut-off events. [2023-08-30 00:05:52,407 INFO L131 PetriNetUnfolder]: For 65810/65810 co-relation queries the response was YES. [2023-08-30 00:05:52,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14054 conditions, 1731 events. 860/1731 cut-off events. For 65810/65810 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11048 event pairs, 83 based on Foata normal form. 16/1747 useless extension candidates. Maximal degree in co-relation 14001. Up to 542 conditions per place. [2023-08-30 00:05:52,433 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 157 selfloop transitions, 182 changer transitions 5/344 dead transitions. [2023-08-30 00:05:52,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 344 transitions, 5761 flow [2023-08-30 00:05:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 00:05:52,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 00:05:52,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1746 transitions. [2023-08-30 00:05:52,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384731290808639 [2023-08-30 00:05:52,437 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1746 transitions. [2023-08-30 00:05:52,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1746 transitions. [2023-08-30 00:05:52,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:52,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1746 transitions. [2023-08-30 00:05:52,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 79.36363636363636) internal successors, (1746), 22 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states 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 00:05:52,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 181.0) internal successors, (4163), 23 states have internal predecessors, (4163), 0 states have call successors, (0), 0 states 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 00:05:52,445 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 181.0) internal successors, (4163), 23 states have internal predecessors, (4163), 0 states have call successors, (0), 0 states 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 00:05:52,445 INFO L175 Difference]: Start difference. First operand has 148 places, 223 transitions, 3199 flow. Second operand 22 states and 1746 transitions. [2023-08-30 00:05:52,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 344 transitions, 5761 flow [2023-08-30 00:05:52,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 344 transitions, 5074 flow, removed 308 selfloop flow, removed 8 redundant places. [2023-08-30 00:05:52,692 INFO L231 Difference]: Finished difference. Result has 170 places, 272 transitions, 4211 flow [2023-08-30 00:05:52,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2652, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4211, PETRI_PLACES=170, PETRI_TRANSITIONS=272} [2023-08-30 00:05:52,693 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 141 predicate places. [2023-08-30 00:05:52,694 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 272 transitions, 4211 flow [2023-08-30 00:05:52,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 75.85714285714286) internal successors, (1062), 14 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 00:05:52,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:52,694 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:52,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-30 00:05:52,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 00:05:52,901 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)] === [2023-08-30 00:05:52,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:52,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1768505241, now seen corresponding path program 8 times [2023-08-30 00:05:52,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:52,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479972375] [2023-08-30 00:05:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:52,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:53,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:53,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479972375] [2023-08-30 00:05:53,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479972375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:53,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938909177] [2023-08-30 00:05:53,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:05:53,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:53,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:53,025 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) [2023-08-30 00:05:53,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 00:05:53,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:05:53,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:53,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:05:53,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:53,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:53,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938909177] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:53,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:53,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-30 00:05:53,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082210702] [2023-08-30 00:05:53,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:53,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 00:05:53,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:53,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 00:05:53,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-30 00:05:53,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:05:53,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 272 transitions, 4211 flow. Second operand has 15 states, 15 states have (on average 75.93333333333334) internal successors, (1139), 15 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states 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 00:05:53,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:53,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:05:53,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:54,047 INFO L130 PetriNetUnfolder]: 828/1658 cut-off events. [2023-08-30 00:05:54,047 INFO L131 PetriNetUnfolder]: For 75394/75394 co-relation queries the response was YES. [2023-08-30 00:05:54,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13425 conditions, 1658 events. 828/1658 cut-off events. For 75394/75394 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 10428 event pairs, 197 based on Foata normal form. 36/1694 useless extension candidates. Maximal degree in co-relation 13365. Up to 856 conditions per place. [2023-08-30 00:05:54,085 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 154 selfloop transitions, 146 changer transitions 3/303 dead transitions. [2023-08-30 00:05:54,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 303 transitions, 4850 flow [2023-08-30 00:05:54,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 00:05:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 00:05:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1039 transitions. [2023-08-30 00:05:54,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4415639609009775 [2023-08-30 00:05:54,088 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1039 transitions. [2023-08-30 00:05:54,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1039 transitions. [2023-08-30 00:05:54,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:54,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1039 transitions. [2023-08-30 00:05:54,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 79.92307692307692) internal successors, (1039), 13 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states 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 00:05:54,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 181.0) internal successors, (2534), 14 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states 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 00:05:54,092 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 181.0) internal successors, (2534), 14 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states 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 00:05:54,092 INFO L175 Difference]: Start difference. First operand has 170 places, 272 transitions, 4211 flow. Second operand 13 states and 1039 transitions. [2023-08-30 00:05:54,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 303 transitions, 4850 flow [2023-08-30 00:05:54,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 303 transitions, 4646 flow, removed 101 selfloop flow, removed 2 redundant places. [2023-08-30 00:05:54,285 INFO L231 Difference]: Finished difference. Result has 181 places, 265 transitions, 4274 flow [2023-08-30 00:05:54,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3790, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4274, PETRI_PLACES=181, PETRI_TRANSITIONS=265} [2023-08-30 00:05:54,286 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 152 predicate places. [2023-08-30 00:05:54,286 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 265 transitions, 4274 flow [2023-08-30 00:05:54,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 75.93333333333334) internal successors, (1139), 15 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states 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 00:05:54,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:54,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:54,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:54,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:54,488 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)] === [2023-08-30 00:05:54,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:54,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1245012087, now seen corresponding path program 9 times [2023-08-30 00:05:54,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:54,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438109123] [2023-08-30 00:05:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:54,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:54,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:54,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438109123] [2023-08-30 00:05:54,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438109123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:54,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477935464] [2023-08-30 00:05:54,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:05:54,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:54,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:54,629 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) [2023-08-30 00:05:54,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 00:05:54,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:05:54,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:54,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:05:54,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:05:54,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:05:54,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477935464] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:54,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:54,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-08-30 00:05:54,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545341197] [2023-08-30 00:05:54,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:54,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 00:05:54,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:54,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 00:05:54,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 00:05:54,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-08-30 00:05:54,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 265 transitions, 4274 flow. Second operand has 9 states, 9 states have (on average 84.11111111111111) internal successors, (757), 9 states have internal predecessors, (757), 0 states have call successors, (0), 0 states 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 00:05:54,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:54,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-08-30 00:05:54,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:55,388 INFO L130 PetriNetUnfolder]: 999/2055 cut-off events. [2023-08-30 00:05:55,389 INFO L131 PetriNetUnfolder]: For 96327/96337 co-relation queries the response was YES. [2023-08-30 00:05:55,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17786 conditions, 2055 events. 999/2055 cut-off events. For 96327/96337 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14109 event pairs, 158 based on Foata normal form. 106/2159 useless extension candidates. Maximal degree in co-relation 17723. Up to 1032 conditions per place. [2023-08-30 00:05:55,417 INFO L137 encePairwiseOnDemand]: 177/181 looper letters, 226 selfloop transitions, 99 changer transitions 54/388 dead transitions. [2023-08-30 00:05:55,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 388 transitions, 7083 flow [2023-08-30 00:05:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:05:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:05:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 446 transitions. [2023-08-30 00:05:55,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49281767955801103 [2023-08-30 00:05:55,420 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 446 transitions. [2023-08-30 00:05:55,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 446 transitions. [2023-08-30 00:05:55,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:55,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 446 transitions. [2023-08-30 00:05:55,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.2) internal successors, (446), 5 states have internal predecessors, (446), 0 states have call successors, (0), 0 states 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 00:05:55,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states 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 00:05:55,422 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states 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 00:05:55,422 INFO L175 Difference]: Start difference. First operand has 181 places, 265 transitions, 4274 flow. Second operand 5 states and 446 transitions. [2023-08-30 00:05:55,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 388 transitions, 7083 flow [2023-08-30 00:05:55,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 388 transitions, 6769 flow, removed 36 selfloop flow, removed 14 redundant places. [2023-08-30 00:05:55,748 INFO L231 Difference]: Finished difference. Result has 173 places, 282 transitions, 4926 flow [2023-08-30 00:05:55,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3970, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4926, PETRI_PLACES=173, PETRI_TRANSITIONS=282} [2023-08-30 00:05:55,749 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 144 predicate places. [2023-08-30 00:05:55,749 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 282 transitions, 4926 flow [2023-08-30 00:05:55,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 84.11111111111111) internal successors, (757), 9 states have internal predecessors, (757), 0 states have call successors, (0), 0 states 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 00:05:55,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:55,750 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:55,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:55,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:55,956 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)] === [2023-08-30 00:05:55,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:55,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1748741396, now seen corresponding path program 10 times [2023-08-30 00:05:55,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:55,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805522810] [2023-08-30 00:05:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:55,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:56,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:56,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805522810] [2023-08-30 00:05:56,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805522810] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:56,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416862607] [2023-08-30 00:05:56,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:05:56,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:56,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:56,101 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) [2023-08-30 00:05:56,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 00:05:56,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:05:56,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:56,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:05:56,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:56,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:56,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416862607] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:56,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:56,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-30 00:05:56,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800353060] [2023-08-30 00:05:56,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:56,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 00:05:56,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:56,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 00:05:56,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-30 00:05:56,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:05:56,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 282 transitions, 4926 flow. Second operand has 15 states, 15 states have (on average 76.0) internal successors, (1140), 15 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 00:05:56,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:56,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:05:56,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:57,902 INFO L130 PetriNetUnfolder]: 1816/3701 cut-off events. [2023-08-30 00:05:57,902 INFO L131 PetriNetUnfolder]: For 177730/177730 co-relation queries the response was YES. [2023-08-30 00:05:57,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32550 conditions, 3701 events. 1816/3701 cut-off events. For 177730/177730 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 27787 event pairs, 247 based on Foata normal form. 72/3773 useless extension candidates. Maximal degree in co-relation 32490. Up to 1432 conditions per place. [2023-08-30 00:05:57,958 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 491 selfloop transitions, 158 changer transitions 7/656 dead transitions. [2023-08-30 00:05:57,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 656 transitions, 12060 flow [2023-08-30 00:05:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 00:05:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 00:05:57,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1376 transitions. [2023-08-30 00:05:57,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447188820279493 [2023-08-30 00:05:57,964 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1376 transitions. [2023-08-30 00:05:57,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1376 transitions. [2023-08-30 00:05:57,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:57,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1376 transitions. [2023-08-30 00:05:57,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 80.94117647058823) internal successors, (1376), 17 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:57,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 181.0) internal successors, (3258), 18 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states 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 00:05:57,972 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 181.0) internal successors, (3258), 18 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states 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 00:05:57,972 INFO L175 Difference]: Start difference. First operand has 173 places, 282 transitions, 4926 flow. Second operand 17 states and 1376 transitions. [2023-08-30 00:05:57,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 656 transitions, 12060 flow [2023-08-30 00:05:58,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 656 transitions, 11811 flow, removed 119 selfloop flow, removed 5 redundant places. [2023-08-30 00:05:58,625 INFO L231 Difference]: Finished difference. Result has 184 places, 400 transitions, 7450 flow [2023-08-30 00:05:58,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7450, PETRI_PLACES=184, PETRI_TRANSITIONS=400} [2023-08-30 00:05:58,626 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2023-08-30 00:05:58,627 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 400 transitions, 7450 flow [2023-08-30 00:05:58,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 76.0) internal successors, (1140), 15 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 00:05:58,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:58,627 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:58,637 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 00:05:58,834 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,SelfDestructingSolverStorable20 [2023-08-30 00:05:58,835 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)] === [2023-08-30 00:05:58,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:58,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2037253858, now seen corresponding path program 11 times [2023-08-30 00:05:58,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:58,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024854366] [2023-08-30 00:05:58,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:58,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:58,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:58,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024854366] [2023-08-30 00:05:58,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024854366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:58,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417076907] [2023-08-30 00:05:58,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:05:58,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:58,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:58,979 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 00:05:58,983 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 00:05:59,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:05:59,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:59,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:05:59,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:59,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:59,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417076907] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:59,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:59,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 00:05:59,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771820353] [2023-08-30 00:05:59,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:59,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 00:05:59,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:59,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 00:05:59,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-30 00:05:59,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:05:59,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 400 transitions, 7450 flow. Second operand has 16 states, 16 states have (on average 75.875) internal successors, (1214), 16 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states 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 00:05:59,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:59,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:05:59,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:06:01,614 INFO L130 PetriNetUnfolder]: 1962/3981 cut-off events. [2023-08-30 00:06:01,615 INFO L131 PetriNetUnfolder]: For 187772/187772 co-relation queries the response was YES. [2023-08-30 00:06:01,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36669 conditions, 3981 events. 1962/3981 cut-off events. For 187772/187772 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 30429 event pairs, 275 based on Foata normal form. 86/4067 useless extension candidates. Maximal degree in co-relation 36604. Up to 1498 conditions per place. [2023-08-30 00:06:01,661 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 557 selfloop transitions, 212 changer transitions 7/776 dead transitions. [2023-08-30 00:06:01,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 776 transitions, 14484 flow [2023-08-30 00:06:01,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 00:06:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 00:06:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2806 transitions. [2023-08-30 00:06:01,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429360694554065 [2023-08-30 00:06:01,666 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2806 transitions. [2023-08-30 00:06:01,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2806 transitions. [2023-08-30 00:06:01,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:06:01,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2806 transitions. [2023-08-30 00:06:01,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 80.17142857142858) internal successors, (2806), 35 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states 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 00:06:01,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 181.0) internal successors, (6516), 36 states have internal predecessors, (6516), 0 states have call successors, (0), 0 states 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 00:06:01,679 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 181.0) internal successors, (6516), 36 states have internal predecessors, (6516), 0 states have call successors, (0), 0 states 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 00:06:01,679 INFO L175 Difference]: Start difference. First operand has 184 places, 400 transitions, 7450 flow. Second operand 35 states and 2806 transitions. [2023-08-30 00:06:01,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 776 transitions, 14484 flow [2023-08-30 00:06:02,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 776 transitions, 14061 flow, removed 191 selfloop flow, removed 4 redundant places. [2023-08-30 00:06:02,477 INFO L231 Difference]: Finished difference. Result has 225 places, 468 transitions, 9306 flow [2023-08-30 00:06:02,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=7133, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9306, PETRI_PLACES=225, PETRI_TRANSITIONS=468} [2023-08-30 00:06:02,478 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 196 predicate places. [2023-08-30 00:06:02,478 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 468 transitions, 9306 flow [2023-08-30 00:06:02,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.875) internal successors, (1214), 16 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states 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 00:06:02,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:06:02,479 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:06:02,484 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 00:06:02,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:02,679 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 00:06:02,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:06:02,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1267397294, now seen corresponding path program 12 times [2023-08-30 00:06:02,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:06:02,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032849632] [2023-08-30 00:06:02,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:06:02,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:06:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:06:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:02,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:06:02,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032849632] [2023-08-30 00:06:02,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032849632] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:06:02,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013358326] [2023-08-30 00:06:02,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:06:02,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:02,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:06:02,896 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 00:06:02,897 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 00:06:03,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 00:06:03,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:06:03,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:06:03,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:06:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:03,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:06:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:03,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013358326] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:06:03,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:06:03,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-08-30 00:06:03,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070803389] [2023-08-30 00:06:03,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:06:03,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:06:03,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:06:03,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:06:03,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-08-30 00:06:03,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:06:03,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 468 transitions, 9306 flow. Second operand has 22 states, 22 states have (on average 75.54545454545455) internal successors, (1662), 22 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states 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 00:06:03,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:06:03,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:06:03,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:06:06,607 INFO L130 PetriNetUnfolder]: 2426/4956 cut-off events. [2023-08-30 00:06:06,608 INFO L131 PetriNetUnfolder]: For 292889/292889 co-relation queries the response was YES. [2023-08-30 00:06:06,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50236 conditions, 4956 events. 2426/4956 cut-off events. For 292889/292889 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 39838 event pairs, 122 based on Foata normal form. 38/4994 useless extension candidates. Maximal degree in co-relation 50160. Up to 1333 conditions per place. [2023-08-30 00:06:06,674 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 332 selfloop transitions, 638 changer transitions 30/1000 dead transitions. [2023-08-30 00:06:06,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 1000 transitions, 21212 flow [2023-08-30 00:06:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-30 00:06:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-30 00:06:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4768 transitions. [2023-08-30 00:06:06,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390423572744015 [2023-08-30 00:06:06,681 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4768 transitions. [2023-08-30 00:06:06,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4768 transitions. [2023-08-30 00:06:06,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:06:06,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4768 transitions. [2023-08-30 00:06:06,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 79.46666666666667) internal successors, (4768), 60 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states 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 00:06:06,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 181.0) internal successors, (11041), 61 states have internal predecessors, (11041), 0 states have call successors, (0), 0 states 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 00:06:06,705 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 181.0) internal successors, (11041), 61 states have internal predecessors, (11041), 0 states have call successors, (0), 0 states 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 00:06:06,705 INFO L175 Difference]: Start difference. First operand has 225 places, 468 transitions, 9306 flow. Second operand 60 states and 4768 transitions. [2023-08-30 00:06:06,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 1000 transitions, 21212 flow [2023-08-30 00:06:07,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1000 transitions, 20341 flow, removed 376 selfloop flow, removed 10 redundant places. [2023-08-30 00:06:08,006 INFO L231 Difference]: Finished difference. Result has 294 places, 752 transitions, 17161 flow [2023-08-30 00:06:08,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=8744, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=17161, PETRI_PLACES=294, PETRI_TRANSITIONS=752} [2023-08-30 00:06:08,007 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 265 predicate places. [2023-08-30 00:06:08,007 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 752 transitions, 17161 flow [2023-08-30 00:06:08,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 75.54545454545455) internal successors, (1662), 22 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states 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 00:06:08,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:06:08,008 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:06:08,015 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 00:06:08,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:08,208 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 00:06:08,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:06:08,209 INFO L85 PathProgramCache]: Analyzing trace with hash -435630226, now seen corresponding path program 13 times [2023-08-30 00:06:08,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:06:08,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658201974] [2023-08-30 00:06:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:06:08,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:06:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:06:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:08,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:06:08,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658201974] [2023-08-30 00:06:08,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658201974] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:06:08,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179217227] [2023-08-30 00:06:08,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:06:08,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:08,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:06:08,439 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:06:08,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 00:06:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:06:08,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:06:08,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:06:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:08,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:06:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:08,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179217227] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:06:08,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:06:08,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-08-30 00:06:08,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308907972] [2023-08-30 00:06:08,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:06:08,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:06:08,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:06:08,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:06:08,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-08-30 00:06:08,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:06:08,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 752 transitions, 17161 flow. Second operand has 22 states, 22 states have (on average 75.5909090909091) internal successors, (1663), 22 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states 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 00:06:08,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:06:08,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:06:08,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:06:12,083 INFO L130 PetriNetUnfolder]: 2387/4835 cut-off events. [2023-08-30 00:06:12,083 INFO L131 PetriNetUnfolder]: For 463727/463727 co-relation queries the response was YES. [2023-08-30 00:06:12,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53749 conditions, 4835 events. 2387/4835 cut-off events. For 463727/463727 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 38317 event pairs, 202 based on Foata normal form. 108/4943 useless extension candidates. Maximal degree in co-relation 53654. Up to 1275 conditions per place. [2023-08-30 00:06:12,137 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 420 selfloop transitions, 517 changer transitions 5/942 dead transitions. [2023-08-30 00:06:12,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 942 transitions, 21563 flow [2023-08-30 00:06:12,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 00:06:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 00:06:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3520 transitions. [2023-08-30 00:06:12,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419889502762431 [2023-08-30 00:06:12,142 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3520 transitions. [2023-08-30 00:06:12,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3520 transitions. [2023-08-30 00:06:12,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:06:12,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3520 transitions. [2023-08-30 00:06:12,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 80.0) internal successors, (3520), 44 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states 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 00:06:12,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 181.0) internal successors, (8145), 45 states have internal predecessors, (8145), 0 states have call successors, (0), 0 states 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 00:06:12,158 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 181.0) internal successors, (8145), 45 states have internal predecessors, (8145), 0 states have call successors, (0), 0 states 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 00:06:12,158 INFO L175 Difference]: Start difference. First operand has 294 places, 752 transitions, 17161 flow. Second operand 44 states and 3520 transitions. [2023-08-30 00:06:12,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 942 transitions, 21563 flow [2023-08-30 00:06:14,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 942 transitions, 19575 flow, removed 882 selfloop flow, removed 16 redundant places. [2023-08-30 00:06:14,056 INFO L231 Difference]: Finished difference. Result has 329 places, 753 transitions, 16733 flow [2023-08-30 00:06:14,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=14801, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16733, PETRI_PLACES=329, PETRI_TRANSITIONS=753} [2023-08-30 00:06:14,058 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 300 predicate places. [2023-08-30 00:06:14,058 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 753 transitions, 16733 flow [2023-08-30 00:06:14,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 75.5909090909091) internal successors, (1663), 22 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states 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 00:06:14,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:06:14,059 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:06:14,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 00:06:14,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 00:06:14,264 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 00:06:14,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:06:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1265018710, now seen corresponding path program 14 times [2023-08-30 00:06:14,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:06:14,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488835812] [2023-08-30 00:06:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:06:14,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:06:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:06:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:14,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:06:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488835812] [2023-08-30 00:06:14,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488835812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:06:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344654809] [2023-08-30 00:06:14,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:06:14,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:14,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:06:14,417 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:06:14,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 00:06:14,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:06:14,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:06:14,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:06:14,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:06:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:14,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:06:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:14,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344654809] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:06:14,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:06:14,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-30 00:06:14,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822726518] [2023-08-30 00:06:14,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:06:14,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 00:06:14,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:06:14,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 00:06:14,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-30 00:06:14,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:06:14,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 753 transitions, 16733 flow. Second operand has 17 states, 17 states have (on average 75.6470588235294) internal successors, (1286), 17 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states 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 00:06:14,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:06:14,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:06:14,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:06:19,793 INFO L130 PetriNetUnfolder]: 2553/5177 cut-off events. [2023-08-30 00:06:19,793 INFO L131 PetriNetUnfolder]: For 528645/528645 co-relation queries the response was YES. [2023-08-30 00:06:19,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58015 conditions, 5177 events. 2553/5177 cut-off events. For 528645/528645 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 41615 event pairs, 307 based on Foata normal form. 112/5289 useless extension candidates. Maximal degree in co-relation 57912. Up to 1938 conditions per place. [2023-08-30 00:06:19,974 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 621 selfloop transitions, 341 changer transitions 22/984 dead transitions. [2023-08-30 00:06:19,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 984 transitions, 22093 flow [2023-08-30 00:06:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 00:06:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 00:06:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2803 transitions. [2023-08-30 00:06:19,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4424625098658248 [2023-08-30 00:06:19,977 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2803 transitions. [2023-08-30 00:06:19,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2803 transitions. [2023-08-30 00:06:19,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:06:19,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2803 transitions. [2023-08-30 00:06:19,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 80.08571428571429) internal successors, (2803), 35 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states 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 00:06:19,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 181.0) internal successors, (6516), 36 states have internal predecessors, (6516), 0 states have call successors, (0), 0 states 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 00:06:19,987 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 181.0) internal successors, (6516), 36 states have internal predecessors, (6516), 0 states have call successors, (0), 0 states 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 00:06:19,987 INFO L175 Difference]: Start difference. First operand has 329 places, 753 transitions, 16733 flow. Second operand 35 states and 2803 transitions. [2023-08-30 00:06:19,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 984 transitions, 22093 flow [2023-08-30 00:06:21,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 984 transitions, 21285 flow, removed 149 selfloop flow, removed 32 redundant places. [2023-08-30 00:06:21,873 INFO L231 Difference]: Finished difference. Result has 339 places, 803 transitions, 18416 flow [2023-08-30 00:06:21,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=15923, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18416, PETRI_PLACES=339, PETRI_TRANSITIONS=803} [2023-08-30 00:06:21,875 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 310 predicate places. [2023-08-30 00:06:21,875 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 803 transitions, 18416 flow [2023-08-30 00:06:21,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 75.6470588235294) internal successors, (1286), 17 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states 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 00:06:21,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:06:21,876 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:06:21,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 00:06:22,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:22,076 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:06:22,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:06:22,077 INFO L85 PathProgramCache]: Analyzing trace with hash -820146284, now seen corresponding path program 15 times [2023-08-30 00:06:22,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:06:22,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10083283] [2023-08-30 00:06:22,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:06:22,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:06:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:06:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:22,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:06:22,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10083283] [2023-08-30 00:06:22,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10083283] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:06:22,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520212872] [2023-08-30 00:06:22,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:06:22,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:22,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:06:22,230 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:06:22,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 00:06:22,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:06:22,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:06:22,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:06:22,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:06:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:22,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:06:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:22,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520212872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:06:22,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:06:22,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 00:06:22,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213108670] [2023-08-30 00:06:22,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:06:22,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 00:06:22,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:06:22,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 00:06:22,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-30 00:06:22,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:06:22,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 803 transitions, 18416 flow. Second operand has 16 states, 16 states have (on average 75.875) internal successors, (1214), 16 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states 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 00:06:22,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:06:22,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:06:22,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:06:25,642 INFO L130 PetriNetUnfolder]: 3040/6136 cut-off events. [2023-08-30 00:06:25,642 INFO L131 PetriNetUnfolder]: For 693451/693451 co-relation queries the response was YES. [2023-08-30 00:06:25,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72125 conditions, 6136 events. 3040/6136 cut-off events. For 693451/693451 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 50831 event pairs, 936 based on Foata normal form. 70/6206 useless extension candidates. Maximal degree in co-relation 72018. Up to 3950 conditions per place. [2023-08-30 00:06:25,728 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 819 selfloop transitions, 315 changer transitions 1/1135 dead transitions. [2023-08-30 00:06:25,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1135 transitions, 26471 flow [2023-08-30 00:06:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 00:06:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 00:06:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3117 transitions. [2023-08-30 00:06:25,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4415639609009775 [2023-08-30 00:06:25,732 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3117 transitions. [2023-08-30 00:06:25,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3117 transitions. [2023-08-30 00:06:25,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:06:25,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3117 transitions. [2023-08-30 00:06:25,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 79.92307692307692) internal successors, (3117), 39 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states 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 00:06:25,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 181.0) internal successors, (7240), 40 states have internal predecessors, (7240), 0 states have call successors, (0), 0 states 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 00:06:25,744 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 181.0) internal successors, (7240), 40 states have internal predecessors, (7240), 0 states have call successors, (0), 0 states 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 00:06:25,744 INFO L175 Difference]: Start difference. First operand has 339 places, 803 transitions, 18416 flow. Second operand 39 states and 3117 transitions. [2023-08-30 00:06:25,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1135 transitions, 26471 flow [2023-08-30 00:06:29,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1135 transitions, 26012 flow, removed 171 selfloop flow, removed 14 redundant places. [2023-08-30 00:06:29,239 INFO L231 Difference]: Finished difference. Result has 379 places, 933 transitions, 22671 flow [2023-08-30 00:06:29,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=18044, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=22671, PETRI_PLACES=379, PETRI_TRANSITIONS=933} [2023-08-30 00:06:29,240 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 350 predicate places. [2023-08-30 00:06:29,240 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 933 transitions, 22671 flow [2023-08-30 00:06:29,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.875) internal successors, (1214), 16 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states 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 00:06:29,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:06:29,241 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:06:29,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-30 00:06:29,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:29,441 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:06:29,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:06:29,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1083346284, now seen corresponding path program 16 times [2023-08-30 00:06:29,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:06:29,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639690999] [2023-08-30 00:06:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:06:29,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:06:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:06:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:29,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:06:29,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639690999] [2023-08-30 00:06:29,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639690999] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:06:29,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633249814] [2023-08-30 00:06:29,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:06:29,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:29,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:06:29,594 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:06:29,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 00:06:29,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:06:29,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:06:29,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:06:29,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:06:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:29,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:06:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:29,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633249814] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:06:29,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:06:29,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-30 00:06:29,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174322169] [2023-08-30 00:06:29,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:06:29,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:06:29,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:06:29,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:06:29,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:06:30,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:06:30,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 933 transitions, 22671 flow. Second operand has 18 states, 18 states have (on average 75.77777777777777) internal successors, (1364), 18 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states 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 00:06:30,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:06:30,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:06:30,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:06:36,698 INFO L130 PetriNetUnfolder]: 3423/6921 cut-off events. [2023-08-30 00:06:36,698 INFO L131 PetriNetUnfolder]: For 937279/937279 co-relation queries the response was YES. [2023-08-30 00:06:36,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85910 conditions, 6921 events. 3423/6921 cut-off events. For 937279/937279 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 58711 event pairs, 962 based on Foata normal form. 90/7011 useless extension candidates. Maximal degree in co-relation 85788. Up to 4362 conditions per place. [2023-08-30 00:06:36,803 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 756 selfloop transitions, 430 changer transitions 29/1215 dead transitions. [2023-08-30 00:06:36,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 1215 transitions, 30083 flow [2023-08-30 00:06:36,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 00:06:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 00:06:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3254 transitions. [2023-08-30 00:06:36,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384853793289314 [2023-08-30 00:06:36,807 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3254 transitions. [2023-08-30 00:06:36,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3254 transitions. [2023-08-30 00:06:36,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:06:36,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3254 transitions. [2023-08-30 00:06:36,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 79.36585365853658) internal successors, (3254), 41 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states 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 00:06:36,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 181.0) internal successors, (7602), 42 states have internal predecessors, (7602), 0 states have call successors, (0), 0 states 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 00:06:36,818 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 181.0) internal successors, (7602), 42 states have internal predecessors, (7602), 0 states have call successors, (0), 0 states 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 00:06:36,818 INFO L175 Difference]: Start difference. First operand has 379 places, 933 transitions, 22671 flow. Second operand 41 states and 3254 transitions. [2023-08-30 00:06:36,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 1215 transitions, 30083 flow [2023-08-30 00:06:40,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1215 transitions, 29039 flow, removed 322 selfloop flow, removed 14 redundant places. [2023-08-30 00:06:40,959 INFO L231 Difference]: Finished difference. Result has 418 places, 1026 transitions, 25755 flow [2023-08-30 00:06:40,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=21624, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=25755, PETRI_PLACES=418, PETRI_TRANSITIONS=1026} [2023-08-30 00:06:40,961 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 389 predicate places. [2023-08-30 00:06:40,961 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 1026 transitions, 25755 flow [2023-08-30 00:06:40,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 75.77777777777777) internal successors, (1364), 18 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states 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 00:06:40,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:06:40,961 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:06:40,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 00:06:41,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:41,167 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:06:41,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:06:41,167 INFO L85 PathProgramCache]: Analyzing trace with hash 240469914, now seen corresponding path program 17 times [2023-08-30 00:06:41,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:06:41,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138354795] [2023-08-30 00:06:41,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:06:41,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:06:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:06:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:41,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:06:41,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138354795] [2023-08-30 00:06:41,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138354795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:06:41,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008164365] [2023-08-30 00:06:41,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:06:41,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:41,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:06:41,300 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:06:41,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 00:06:41,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:06:41,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:06:41,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:06:41,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:06:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:41,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:06:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:41,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008164365] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:06:41,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:06:41,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-30 00:06:41,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704553440] [2023-08-30 00:06:41,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:06:41,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 00:06:41,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:06:41,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 00:06:41,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-08-30 00:06:41,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:06:41,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 1026 transitions, 25755 flow. Second operand has 17 states, 17 states have (on average 75.76470588235294) internal successors, (1288), 17 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states 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 00:06:41,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:06:41,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:06:41,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:06:46,824 INFO L130 PetriNetUnfolder]: 3683/7454 cut-off events. [2023-08-30 00:06:46,824 INFO L131 PetriNetUnfolder]: For 1096253/1096253 co-relation queries the response was YES. [2023-08-30 00:06:46,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95750 conditions, 7454 events. 3683/7454 cut-off events. For 1096253/1096253 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 63845 event pairs, 1403 based on Foata normal form. 80/7534 useless extension candidates. Maximal degree in co-relation 95618. Up to 5970 conditions per place. [2023-08-30 00:06:46,946 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 973 selfloop transitions, 252 changer transitions 24/1249 dead transitions. [2023-08-30 00:06:46,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1249 transitions, 32361 flow [2023-08-30 00:06:46,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 00:06:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 00:06:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2164 transitions. [2023-08-30 00:06:46,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4428074483323102 [2023-08-30 00:06:46,949 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2164 transitions. [2023-08-30 00:06:46,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2164 transitions. [2023-08-30 00:06:46,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:06:46,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2164 transitions. [2023-08-30 00:06:46,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 80.14814814814815) internal successors, (2164), 27 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states 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 00:06:46,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 181.0) internal successors, (5068), 28 states have internal predecessors, (5068), 0 states have call successors, (0), 0 states 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 00:06:46,956 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 181.0) internal successors, (5068), 28 states have internal predecessors, (5068), 0 states have call successors, (0), 0 states 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 00:06:46,956 INFO L175 Difference]: Start difference. First operand has 418 places, 1026 transitions, 25755 flow. Second operand 27 states and 2164 transitions. [2023-08-30 00:06:46,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1249 transitions, 32361 flow [2023-08-30 00:06:52,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 1249 transitions, 31838 flow, removed 206 selfloop flow, removed 20 redundant places. [2023-08-30 00:06:52,773 INFO L231 Difference]: Finished difference. Result has 432 places, 1090 transitions, 28054 flow [2023-08-30 00:06:52,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=25254, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=789, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=28054, PETRI_PLACES=432, PETRI_TRANSITIONS=1090} [2023-08-30 00:06:52,774 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 403 predicate places. [2023-08-30 00:06:52,774 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 1090 transitions, 28054 flow [2023-08-30 00:06:52,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 75.76470588235294) internal successors, (1288), 17 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states 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 00:06:52,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:06:52,775 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:06:52,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 00:06:52,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 00:06:52,980 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:06:52,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:06:52,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1616663070, now seen corresponding path program 18 times [2023-08-30 00:06:52,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:06:52,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542347636] [2023-08-30 00:06:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:06:52,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:06:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:06:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:53,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:06:53,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542347636] [2023-08-30 00:06:53,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542347636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:06:53,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638709350] [2023-08-30 00:06:53,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:06:53,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:53,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:06:53,117 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:06:53,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 00:06:53,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 00:06:53,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:06:53,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:06:53,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:06:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:53,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:06:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:53,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638709350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:06:53,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:06:53,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 00:06:53,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183948693] [2023-08-30 00:06:53,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:06:53,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 00:06:53,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:06:53,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 00:06:53,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-30 00:06:53,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:06:53,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 1090 transitions, 28054 flow. Second operand has 16 states, 16 states have (on average 75.875) internal successors, (1214), 16 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states 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 00:06:53,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:06:53,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:06:53,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:06:58,206 INFO L130 PetriNetUnfolder]: 3970/7965 cut-off events. [2023-08-30 00:06:58,207 INFO L131 PetriNetUnfolder]: For 1197792/1197792 co-relation queries the response was YES. [2023-08-30 00:06:58,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102744 conditions, 7965 events. 3970/7965 cut-off events. For 1197792/1197792 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 68472 event pairs, 1534 based on Foata normal form. 112/8077 useless extension candidates. Maximal degree in co-relation 102606. Up to 6640 conditions per place. [2023-08-30 00:06:58,337 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 1104 selfloop transitions, 271 changer transitions 4/1379 dead transitions. [2023-08-30 00:06:58,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 1379 transitions, 36469 flow [2023-08-30 00:06:58,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 00:06:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 00:06:58,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2876 transitions. [2023-08-30 00:06:58,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44137507673419274 [2023-08-30 00:06:58,341 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2876 transitions. [2023-08-30 00:06:58,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2876 transitions. [2023-08-30 00:06:58,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:06:58,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2876 transitions. [2023-08-30 00:06:58,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 79.88888888888889) internal successors, (2876), 36 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states 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 00:06:58,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 181.0) internal successors, (6697), 37 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states 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 00:06:58,351 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 181.0) internal successors, (6697), 37 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states 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 00:06:58,351 INFO L175 Difference]: Start difference. First operand has 432 places, 1090 transitions, 28054 flow. Second operand 36 states and 2876 transitions. [2023-08-30 00:06:58,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 1379 transitions, 36469 flow [2023-08-30 00:07:04,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 1379 transitions, 35863 flow, removed 230 selfloop flow, removed 11 redundant places. [2023-08-30 00:07:04,743 INFO L231 Difference]: Finished difference. Result has 470 places, 1194 transitions, 31713 flow [2023-08-30 00:07:04,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=27645, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=868, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=31713, PETRI_PLACES=470, PETRI_TRANSITIONS=1194} [2023-08-30 00:07:04,746 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 441 predicate places. [2023-08-30 00:07:04,746 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 1194 transitions, 31713 flow [2023-08-30 00:07:04,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.875) internal successors, (1214), 16 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states 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 00:07:04,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:07:04,747 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:07:04,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-30 00:07:04,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 00:07:04,953 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:07:04,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:07:04,954 INFO L85 PathProgramCache]: Analyzing trace with hash 2023571842, now seen corresponding path program 19 times [2023-08-30 00:07:04,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:07:04,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572187555] [2023-08-30 00:07:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:07:04,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:07:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:07:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:05,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:07:05,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572187555] [2023-08-30 00:07:05,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572187555] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:07:05,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603808082] [2023-08-30 00:07:05,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:07:05,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:07:05,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:07:05,195 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:07:05,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 00:07:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:07:05,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:07:05,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:07:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:05,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:07:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:05,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603808082] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:07:05,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:07:05,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-08-30 00:07:05,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526233478] [2023-08-30 00:07:05,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:07:05,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:07:05,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:07:05,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:07:05,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:07:05,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:07:05,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 1194 transitions, 31713 flow. Second operand has 21 states, 21 states have (on average 75.61904761904762) internal successors, (1588), 21 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 00:07:05,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:07:05,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:07:05,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:07:12,853 INFO L130 PetriNetUnfolder]: 4415/9006 cut-off events. [2023-08-30 00:07:12,853 INFO L131 PetriNetUnfolder]: For 1625478/1625478 co-relation queries the response was YES. [2023-08-30 00:07:12,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122195 conditions, 9006 events. 4415/9006 cut-off events. For 1625478/1625478 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 80514 event pairs, 869 based on Foata normal form. 72/9078 useless extension candidates. Maximal degree in co-relation 122042. Up to 3346 conditions per place. [2023-08-30 00:07:13,002 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 686 selfloop transitions, 832 changer transitions 16/1534 dead transitions. [2023-08-30 00:07:13,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 1534 transitions, 42054 flow [2023-08-30 00:07:13,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 00:07:13,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 00:07:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2753 transitions. [2023-08-30 00:07:13,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44735131621709456 [2023-08-30 00:07:13,005 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2753 transitions. [2023-08-30 00:07:13,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2753 transitions. [2023-08-30 00:07:13,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:07:13,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2753 transitions. [2023-08-30 00:07:13,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 80.97058823529412) internal successors, (2753), 34 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states 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 00:07:13,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 181.0) internal successors, (6335), 35 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states 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 00:07:13,014 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 181.0) internal successors, (6335), 35 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states 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 00:07:13,014 INFO L175 Difference]: Start difference. First operand has 470 places, 1194 transitions, 31713 flow. Second operand 34 states and 2753 transitions. [2023-08-30 00:07:13,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 1534 transitions, 42054 flow [2023-08-30 00:07:21,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 1534 transitions, 41032 flow, removed 427 selfloop flow, removed 16 redundant places. [2023-08-30 00:07:21,107 INFO L231 Difference]: Finished difference. Result has 502 places, 1321 transitions, 37369 flow [2023-08-30 00:07:21,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=30711, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=714, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=37369, PETRI_PLACES=502, PETRI_TRANSITIONS=1321} [2023-08-30 00:07:21,109 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 473 predicate places. [2023-08-30 00:07:21,109 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 1321 transitions, 37369 flow [2023-08-30 00:07:21,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 75.61904761904762) internal successors, (1588), 21 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 00:07:21,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:07:21,109 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:07:21,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 00:07:21,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:07:21,315 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:07:21,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:07:21,316 INFO L85 PathProgramCache]: Analyzing trace with hash 449480860, now seen corresponding path program 20 times [2023-08-30 00:07:21,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:07:21,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34236025] [2023-08-30 00:07:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:07:21,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:07:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:07:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:21,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:07:21,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34236025] [2023-08-30 00:07:21,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34236025] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:07:21,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106908391] [2023-08-30 00:07:21,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:07:21,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:07:21,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:07:21,453 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:07:21,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 00:07:21,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:07:21,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:07:21,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:07:21,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:07:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:21,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:07:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:21,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106908391] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:07:21,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:07:21,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 00:07:21,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553708541] [2023-08-30 00:07:21,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:07:21,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 00:07:21,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:07:21,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 00:07:21,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-30 00:07:21,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:07:21,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 1321 transitions, 37369 flow. Second operand has 16 states, 16 states have (on average 75.6875) internal successors, (1211), 16 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states 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 00:07:21,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:07:21,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:07:21,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:07:27,893 INFO L130 PetriNetUnfolder]: 4652/9433 cut-off events. [2023-08-30 00:07:27,893 INFO L131 PetriNetUnfolder]: For 1949611/1949611 co-relation queries the response was YES. [2023-08-30 00:07:28,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133991 conditions, 9433 events. 4652/9433 cut-off events. For 1949611/1949611 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 84507 event pairs, 1943 based on Foata normal form. 148/9581 useless extension candidates. Maximal degree in co-relation 133822. Up to 8525 conditions per place. [2023-08-30 00:07:28,051 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 1329 selfloop transitions, 206 changer transitions 4/1539 dead transitions. [2023-08-30 00:07:28,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 1539 transitions, 44419 flow [2023-08-30 00:07:28,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 00:07:28,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 00:07:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2871 transitions. [2023-08-30 00:07:28,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44060773480662985 [2023-08-30 00:07:28,053 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2871 transitions. [2023-08-30 00:07:28,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2871 transitions. [2023-08-30 00:07:28,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:07:28,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2871 transitions. [2023-08-30 00:07:28,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 79.75) internal successors, (2871), 36 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states 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 00:07:28,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 181.0) internal successors, (6697), 37 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states 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 00:07:28,062 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 181.0) internal successors, (6697), 37 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states 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 00:07:28,062 INFO L175 Difference]: Start difference. First operand has 502 places, 1321 transitions, 37369 flow. Second operand 36 states and 2871 transitions. [2023-08-30 00:07:28,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 1539 transitions, 44419 flow [2023-08-30 00:07:38,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 1539 transitions, 43006 flow, removed 628 selfloop flow, removed 11 redundant places. [2023-08-30 00:07:38,185 INFO L231 Difference]: Finished difference. Result has 541 places, 1398 transitions, 39141 flow [2023-08-30 00:07:38,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=36484, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=39141, PETRI_PLACES=541, PETRI_TRANSITIONS=1398} [2023-08-30 00:07:38,187 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 512 predicate places. [2023-08-30 00:07:38,187 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 1398 transitions, 39141 flow [2023-08-30 00:07:38,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.6875) internal successors, (1211), 16 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states 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 00:07:38,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:07:38,187 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:07:38,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 00:07:38,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:07:38,389 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:07:38,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:07:38,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1191804774, now seen corresponding path program 21 times [2023-08-30 00:07:38,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:07:38,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012829772] [2023-08-30 00:07:38,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:07:38,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:07:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:07:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:38,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:07:38,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012829772] [2023-08-30 00:07:38,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012829772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:07:38,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938432649] [2023-08-30 00:07:38,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:07:38,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:07:38,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:07:38,577 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:07:38,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 00:07:38,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 00:07:38,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:07:38,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:07:38,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:07:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:38,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:07:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:38,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938432649] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:07:38,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:07:38,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-08-30 00:07:38,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871414025] [2023-08-30 00:07:38,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:07:38,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:07:38,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:07:38,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:07:38,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:07:39,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:07:39,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 1398 transitions, 39141 flow. Second operand has 21 states, 21 states have (on average 75.57142857142857) internal successors, (1587), 21 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states 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 00:07:39,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:07:39,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:07:39,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:07:42,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 00:07:50,450 INFO L130 PetriNetUnfolder]: 4650/9412 cut-off events. [2023-08-30 00:07:50,450 INFO L131 PetriNetUnfolder]: For 2025962/2025962 co-relation queries the response was YES. [2023-08-30 00:07:50,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139464 conditions, 9412 events. 4650/9412 cut-off events. For 2025962/2025962 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 84217 event pairs, 360 based on Foata normal form. 24/9436 useless extension candidates. Maximal degree in co-relation 139284. Up to 2788 conditions per place. [2023-08-30 00:07:50,623 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 504 selfloop transitions, 1089 changer transitions 23/1616 dead transitions. [2023-08-30 00:07:50,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 1616 transitions, 47234 flow [2023-08-30 00:07:50,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-30 00:07:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-30 00:07:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4168 transitions. [2023-08-30 00:07:50,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344834775357031 [2023-08-30 00:07:50,627 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4168 transitions. [2023-08-30 00:07:50,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4168 transitions. [2023-08-30 00:07:50,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:07:50,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4168 transitions. [2023-08-30 00:07:50,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 78.64150943396227) internal successors, (4168), 53 states have internal predecessors, (4168), 0 states have call successors, (0), 0 states 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 00:07:50,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 181.0) internal successors, (9774), 54 states have internal predecessors, (9774), 0 states have call successors, (0), 0 states 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 00:07:50,641 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 181.0) internal successors, (9774), 54 states have internal predecessors, (9774), 0 states have call successors, (0), 0 states 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 00:07:50,641 INFO L175 Difference]: Start difference. First operand has 541 places, 1398 transitions, 39141 flow. Second operand 53 states and 4168 transitions. [2023-08-30 00:07:50,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 1616 transitions, 47234 flow [2023-08-30 00:08:03,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 1616 transitions, 45970 flow, removed 577 selfloop flow, removed 13 redundant places. [2023-08-30 00:08:03,415 INFO L231 Difference]: Finished difference. Result has 587 places, 1452 transitions, 42431 flow [2023-08-30 00:08:03,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=37991, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=42431, PETRI_PLACES=587, PETRI_TRANSITIONS=1452} [2023-08-30 00:08:03,418 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 558 predicate places. [2023-08-30 00:08:03,418 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 1452 transitions, 42431 flow [2023-08-30 00:08:03,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 75.57142857142857) internal successors, (1587), 21 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states 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 00:08:03,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:08:03,418 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:08:03,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 00:08:03,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:08:03,619 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:08:03,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:08:03,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1221888988, now seen corresponding path program 22 times [2023-08-30 00:08:03,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:08:03,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237920843] [2023-08-30 00:08:03,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:08:03,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:08:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:08:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:08:03,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:08:03,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237920843] [2023-08-30 00:08:03,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237920843] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:08:03,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905316881] [2023-08-30 00:08:03,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:08:03,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:08:03,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:08:03,741 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:08:03,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 00:08:03,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:08:03,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:08:03,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:08:03,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:08:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:08:03,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:08:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:08:03,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905316881] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:08:03,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:08:03,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-30 00:08:03,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68199898] [2023-08-30 00:08:03,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:08:03,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 00:08:03,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:08:03,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 00:08:03,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-30 00:08:04,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:08:04,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 1452 transitions, 42431 flow. Second operand has 17 states, 17 states have (on average 75.70588235294117) internal successors, (1287), 17 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:04,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:08:04,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:08:04,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:08:11,640 INFO L130 PetriNetUnfolder]: 4856/9763 cut-off events. [2023-08-30 00:08:11,640 INFO L131 PetriNetUnfolder]: For 2225601/2225601 co-relation queries the response was YES. [2023-08-30 00:08:11,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146419 conditions, 9763 events. 4856/9763 cut-off events. For 2225601/2225601 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 87035 event pairs, 1591 based on Foata normal form. 70/9833 useless extension candidates. Maximal degree in co-relation 146232. Up to 7371 conditions per place. [2023-08-30 00:08:11,836 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 1148 selfloop transitions, 481 changer transitions 23/1652 dead transitions. [2023-08-30 00:08:11,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1652 transitions, 50084 flow [2023-08-30 00:08:11,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 00:08:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 00:08:11,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2318 transitions. [2023-08-30 00:08:11,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4416079253191084 [2023-08-30 00:08:11,838 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2318 transitions. [2023-08-30 00:08:11,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2318 transitions. [2023-08-30 00:08:11,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:08:11,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2318 transitions. [2023-08-30 00:08:11,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 79.93103448275862) internal successors, (2318), 29 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states 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 00:08:11,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 181.0) internal successors, (5430), 30 states have internal predecessors, (5430), 0 states have call successors, (0), 0 states 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 00:08:11,844 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 181.0) internal successors, (5430), 30 states have internal predecessors, (5430), 0 states have call successors, (0), 0 states 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 00:08:11,844 INFO L175 Difference]: Start difference. First operand has 587 places, 1452 transitions, 42431 flow. Second operand 29 states and 2318 transitions. [2023-08-30 00:08:11,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1652 transitions, 50084 flow [2023-08-30 00:08:26,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 1652 transitions, 48200 flow, removed 728 selfloop flow, removed 17 redundant places. [2023-08-30 00:08:26,580 INFO L231 Difference]: Finished difference. Result has 603 places, 1523 transitions, 44894 flow [2023-08-30 00:08:26,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=41050, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=995, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=44894, PETRI_PLACES=603, PETRI_TRANSITIONS=1523} [2023-08-30 00:08:26,582 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 574 predicate places. [2023-08-30 00:08:26,582 INFO L495 AbstractCegarLoop]: Abstraction has has 603 places, 1523 transitions, 44894 flow [2023-08-30 00:08:26,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 75.70588235294117) internal successors, (1287), 17 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:26,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:08:26,582 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:08:26,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 00:08:26,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-30 00:08:26,783 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:08:26,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:08:26,784 INFO L85 PathProgramCache]: Analyzing trace with hash 961747000, now seen corresponding path program 23 times [2023-08-30 00:08:26,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:08:26,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810967377] [2023-08-30 00:08:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:08:26,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:08:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:08:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:08:26,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:08:26,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810967377] [2023-08-30 00:08:26,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810967377] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:08:26,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328392994] [2023-08-30 00:08:26,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:08:26,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:08:26,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:08:26,933 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:08:26,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 00:08:27,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:08:27,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:08:27,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 00:08:27,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:08:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:08:27,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:08:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:08:27,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328392994] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:08:27,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:08:27,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2023-08-30 00:08:27,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066177007] [2023-08-30 00:08:27,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:08:27,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:08:27,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:08:27,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:08:27,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:08:27,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-08-30 00:08:27,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 1523 transitions, 44894 flow. Second operand has 14 states, 14 states have (on average 82.64285714285714) internal successors, (1157), 14 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states 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 00:08:27,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:08:27,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-08-30 00:08:27,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:08:35,834 INFO L130 PetriNetUnfolder]: 6095/12322 cut-off events. [2023-08-30 00:08:35,834 INFO L131 PetriNetUnfolder]: For 2968842/2968852 co-relation queries the response was YES. [2023-08-30 00:08:36,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192219 conditions, 12322 events. 6095/12322 cut-off events. For 2968842/2968852 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 114473 event pairs, 748 based on Foata normal form. 234/12552 useless extension candidates. Maximal degree in co-relation 192025. Up to 6101 conditions per place. [2023-08-30 00:08:36,103 INFO L137 encePairwiseOnDemand]: 177/181 looper letters, 1139 selfloop transitions, 735 changer transitions 159/2046 dead transitions. [2023-08-30 00:08:36,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 2046 transitions, 64520 flow [2023-08-30 00:08:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:08:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:08:36,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 715 transitions. [2023-08-30 00:08:36,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937845303867403 [2023-08-30 00:08:36,104 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 715 transitions. [2023-08-30 00:08:36,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 715 transitions. [2023-08-30 00:08:36,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:08:36,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 715 transitions. [2023-08-30 00:08:36,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 89.375) internal successors, (715), 8 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 00:08:36,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 181.0) internal successors, (1629), 9 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states 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 00:08:36,107 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 181.0) internal successors, (1629), 9 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states 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 00:08:36,107 INFO L175 Difference]: Start difference. First operand has 603 places, 1523 transitions, 44894 flow. Second operand 8 states and 715 transitions. [2023-08-30 00:08:36,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 2046 transitions, 64520 flow [2023-08-30 00:08:57,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 2046 transitions, 64064 flow, removed 123 selfloop flow, removed 22 redundant places. [2023-08-30 00:08:57,368 INFO L231 Difference]: Finished difference. Result has 591 places, 1742 transitions, 55725 flow [2023-08-30 00:08:57,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=44314, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=55725, PETRI_PLACES=591, PETRI_TRANSITIONS=1742} [2023-08-30 00:08:57,371 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 562 predicate places. [2023-08-30 00:08:57,371 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 1742 transitions, 55725 flow [2023-08-30 00:08:57,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.64285714285714) internal successors, (1157), 14 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states 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 00:08:57,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:08:57,371 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:08:57,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 00:08:57,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-30 00:08:57,576 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:08:57,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:08:57,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1990431541, now seen corresponding path program 24 times [2023-08-30 00:08:57,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:08:57,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277675728] [2023-08-30 00:08:57,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:08:57,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:08:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:08:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:08:57,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:08:57,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277675728] [2023-08-30 00:08:57,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277675728] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:08:57,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069148987] [2023-08-30 00:08:57,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:08:57,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:08:57,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:08:57,749 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:08:57,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 00:08:57,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 00:08:57,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:08:57,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:08:57,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:08:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:08:57,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:08:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:08:58,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069148987] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:08:58,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:08:58,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-08-30 00:08:58,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198637991] [2023-08-30 00:08:58,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:08:58,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 00:08:58,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:08:58,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 00:08:58,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-08-30 00:08:58,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:08:58,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 1742 transitions, 55725 flow. Second operand has 19 states, 19 states have (on average 75.94736842105263) internal successors, (1443), 19 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states 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 00:08:58,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:08:58,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:08:58,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:09:15,029 INFO L130 PetriNetUnfolder]: 10094/20542 cut-off events. [2023-08-30 00:09:15,029 INFO L131 PetriNetUnfolder]: For 5100433/5100433 co-relation queries the response was YES. [2023-08-30 00:09:15,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322765 conditions, 20542 events. 10094/20542 cut-off events. For 5100433/5100433 co-relation queries the response was YES. Maximal size of possible extension queue 1638. Compared 205298 event pairs, 1561 based on Foata normal form. 190/20732 useless extension candidates. Maximal degree in co-relation 322570. Up to 7516 conditions per place. [2023-08-30 00:09:15,747 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 2674 selfloop transitions, 666 changer transitions 3/3343 dead transitions. [2023-08-30 00:09:15,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 3343 transitions, 110018 flow [2023-08-30 00:09:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 00:09:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 00:09:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2103 transitions. [2023-08-30 00:09:15,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4468763280917977 [2023-08-30 00:09:15,750 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2103 transitions. [2023-08-30 00:09:15,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2103 transitions. [2023-08-30 00:09:15,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:09:15,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2103 transitions. [2023-08-30 00:09:15,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 80.88461538461539) internal successors, (2103), 26 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states 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 00:09:15,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 181.0) internal successors, (4887), 27 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states 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 00:09:15,754 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 181.0) internal successors, (4887), 27 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states 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 00:09:15,754 INFO L175 Difference]: Start difference. First operand has 591 places, 1742 transitions, 55725 flow. Second operand 26 states and 2103 transitions. [2023-08-30 00:09:15,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 3343 transitions, 110018 flow [2023-08-30 00:10:02,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 3343 transitions, 108159 flow, removed 836 selfloop flow, removed 12 redundant places. [2023-08-30 00:10:02,579 INFO L231 Difference]: Finished difference. Result has 597 places, 2146 transitions, 68872 flow [2023-08-30 00:10:02,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=54738, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=68872, PETRI_PLACES=597, PETRI_TRANSITIONS=2146} [2023-08-30 00:10:02,582 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 568 predicate places. [2023-08-30 00:10:02,582 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 2146 transitions, 68872 flow [2023-08-30 00:10:02,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 75.94736842105263) internal successors, (1443), 19 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states 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 00:10:02,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:10:02,583 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:10:02,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 00:10:02,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-30 00:10:02,791 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:10:02,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:10:02,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1761027897, now seen corresponding path program 25 times [2023-08-30 00:10:02,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:10:02,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172588843] [2023-08-30 00:10:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:10:02,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:10:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:10:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:02,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:10:02,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172588843] [2023-08-30 00:10:02,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172588843] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:10:02,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428443386] [2023-08-30 00:10:02,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:10:02,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:10:02,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:10:02,963 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:10:02,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 00:10:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:10:03,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:10:03,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:10:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:03,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:10:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:03,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428443386] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:10:03,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:10:03,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-30 00:10:03,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388925039] [2023-08-30 00:10:03,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:10:03,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 00:10:03,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:10:03,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 00:10:03,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-08-30 00:10:03,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:10:03,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 2146 transitions, 68872 flow. Second operand has 23 states, 23 states have (on average 75.47826086956522) internal successors, (1736), 23 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states 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 00:10:03,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:10:03,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:10:03,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:10:24,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 00:11:04,785 INFO L130 PetriNetUnfolder]: 11413/23561 cut-off events. [2023-08-30 00:11:04,785 INFO L131 PetriNetUnfolder]: For 6092909/6092909 co-relation queries the response was YES. [2023-08-30 00:11:05,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391192 conditions, 23561 events. 11413/23561 cut-off events. For 6092909/6092909 co-relation queries the response was YES. Maximal size of possible extension queue 1833. Compared 243245 event pairs, 374 based on Foata normal form. 92/23653 useless extension candidates. Maximal degree in co-relation 390996. Up to 5929 conditions per place. [2023-08-30 00:11:05,353 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 867 selfloop transitions, 3190 changer transitions 67/4124 dead transitions. [2023-08-30 00:11:05,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 712 places, 4124 transitions, 140889 flow [2023-08-30 00:11:05,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-08-30 00:11:05,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2023-08-30 00:11:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 9232 transitions. [2023-08-30 00:11:05,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43970280053343497 [2023-08-30 00:11:05,362 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 9232 transitions. [2023-08-30 00:11:05,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 9232 transitions. [2023-08-30 00:11:05,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:11:05,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 9232 transitions. [2023-08-30 00:11:05,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 79.58620689655173) internal successors, (9232), 116 states have internal predecessors, (9232), 0 states have call successors, (0), 0 states 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 00:11:05,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 181.0) internal successors, (21177), 117 states have internal predecessors, (21177), 0 states have call successors, (0), 0 states 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 00:11:05,391 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 181.0) internal successors, (21177), 117 states have internal predecessors, (21177), 0 states have call successors, (0), 0 states 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 00:11:05,391 INFO L175 Difference]: Start difference. First operand has 597 places, 2146 transitions, 68872 flow. Second operand 116 states and 9232 transitions. [2023-08-30 00:11:05,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 712 places, 4124 transitions, 140889 flow [2023-08-30 00:12:04,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 699 places, 4124 transitions, 138159 flow, removed 1186 selfloop flow, removed 13 redundant places. [2023-08-30 00:12:05,057 INFO L231 Difference]: Finished difference. Result has 737 places, 3492 transitions, 124100 flow [2023-08-30 00:12:05,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=66904, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1893, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=124100, PETRI_PLACES=737, PETRI_TRANSITIONS=3492} [2023-08-30 00:12:05,060 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 708 predicate places. [2023-08-30 00:12:05,060 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 3492 transitions, 124100 flow [2023-08-30 00:12:05,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 75.47826086956522) internal successors, (1736), 23 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states 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 00:12:05,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:12:05,061 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:12:05,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 00:12:05,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:12:05,270 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:12:05,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:12:05,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2089711047, now seen corresponding path program 26 times [2023-08-30 00:12:05,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:12:05,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967824188] [2023-08-30 00:12:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:12:05,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:12:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:12:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:12:05,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:12:05,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967824188] [2023-08-30 00:12:05,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967824188] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:12:05,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323607687] [2023-08-30 00:12:05,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:12:05,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:12:05,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:12:05,437 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:12:05,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 00:12:05,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:12:05,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:12:05,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:12:05,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:12:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:12:05,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:12:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:12:05,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323607687] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:12:05,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:12:05,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-08-30 00:12:05,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541334602] [2023-08-30 00:12:05,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:12:05,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 00:12:05,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:12:05,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 00:12:05,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-30 00:12:05,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:12:05,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 3492 transitions, 124100 flow. Second operand has 20 states, 20 states have (on average 75.7) internal successors, (1514), 20 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states 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 00:12:05,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:12:05,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:12:05,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:12:42,899 INFO L130 PetriNetUnfolder]: 11885/24255 cut-off events. [2023-08-30 00:12:42,899 INFO L131 PetriNetUnfolder]: For 10040563/10040563 co-relation queries the response was YES. [2023-08-30 00:12:43,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441730 conditions, 24255 events. 11885/24255 cut-off events. For 10040563/10040563 co-relation queries the response was YES. Maximal size of possible extension queue 1918. Compared 248755 event pairs, 1887 based on Foata normal form. 278/24533 useless extension candidates. Maximal degree in co-relation 441502. Up to 9149 conditions per place. [2023-08-30 00:12:43,675 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 3252 selfloop transitions, 922 changer transitions 1/4175 dead transitions. [2023-08-30 00:12:43,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 4175 transitions, 149593 flow [2023-08-30 00:12:43,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-30 00:12:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-30 00:12:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4652 transitions. [2023-08-30 00:12:43,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44313202514764716 [2023-08-30 00:12:43,679 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4652 transitions. [2023-08-30 00:12:43,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4652 transitions. [2023-08-30 00:12:43,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:12:43,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4652 transitions. [2023-08-30 00:12:43,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 80.20689655172414) internal successors, (4652), 58 states have internal predecessors, (4652), 0 states have call successors, (0), 0 states 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 00:12:43,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 181.0) internal successors, (10679), 59 states have internal predecessors, (10679), 0 states have call successors, (0), 0 states 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 00:12:43,691 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 181.0) internal successors, (10679), 59 states have internal predecessors, (10679), 0 states have call successors, (0), 0 states 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 00:12:43,691 INFO L175 Difference]: Start difference. First operand has 737 places, 3492 transitions, 124100 flow. Second operand 58 states and 4652 transitions. [2023-08-30 00:12:43,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 4175 transitions, 149593 flow [2023-08-30 00:14:50,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 4175 transitions, 136040 flow, removed 6270 selfloop flow, removed 29 redundant places. [2023-08-30 00:14:51,110 INFO L231 Difference]: Finished difference. Result has 775 places, 3686 transitions, 121315 flow [2023-08-30 00:14:51,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=112294, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=769, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=121315, PETRI_PLACES=775, PETRI_TRANSITIONS=3686} [2023-08-30 00:14:51,114 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 746 predicate places. [2023-08-30 00:14:51,114 INFO L495 AbstractCegarLoop]: Abstraction has has 775 places, 3686 transitions, 121315 flow [2023-08-30 00:14:51,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 75.7) internal successors, (1514), 20 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states 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 00:14:51,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:14:51,115 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:14:51,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 00:14:51,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 00:14:51,324 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:14:51,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:14:51,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1786181963, now seen corresponding path program 27 times [2023-08-30 00:14:51,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:14:51,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230196949] [2023-08-30 00:14:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:14:51,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:14:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:14:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:14:51,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:14:51,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230196949] [2023-08-30 00:14:51,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230196949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:14:51,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869875582] [2023-08-30 00:14:51,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:14:51,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:14:51,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:14:51,492 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:14:51,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 00:14:51,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 00:14:51,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:14:51,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:14:51,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:14:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:14:51,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:14:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:14:51,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869875582] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:14:51,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:14:51,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-08-30 00:14:51,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945554302] [2023-08-30 00:14:51,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:14:51,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:14:51,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:14:51,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:14:51,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-08-30 00:14:52,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:14:52,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 775 places, 3686 transitions, 121315 flow. Second operand has 22 states, 22 states have (on average 75.63636363636364) internal successors, (1664), 22 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states 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 00:14:52,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:14:52,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:14:52,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:15:45,397 INFO L130 PetriNetUnfolder]: 14326/29794 cut-off events. [2023-08-30 00:15:45,398 INFO L131 PetriNetUnfolder]: For 15362266/15362266 co-relation queries the response was YES. [2023-08-30 00:15:46,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554705 conditions, 29794 events. 14326/29794 cut-off events. For 15362266/15362266 co-relation queries the response was YES. Maximal size of possible extension queue 2242. Compared 318851 event pairs, 1663 based on Foata normal form. 610/30404 useless extension candidates. Maximal degree in co-relation 554468. Up to 7311 conditions per place. [2023-08-30 00:15:47,006 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 2653 selfloop transitions, 2285 changer transitions 90/5028 dead transitions. [2023-08-30 00:15:47,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 5028 transitions, 168813 flow [2023-08-30 00:15:47,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-30 00:15:47,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-30 00:15:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 6011 transitions. [2023-08-30 00:15:47,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4427992633517495 [2023-08-30 00:15:47,011 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 6011 transitions. [2023-08-30 00:15:47,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 6011 transitions. [2023-08-30 00:15:47,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:15:47,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 6011 transitions. [2023-08-30 00:15:47,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 80.14666666666666) internal successors, (6011), 75 states have internal predecessors, (6011), 0 states have call successors, (0), 0 states 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 00:15:47,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 181.0) internal successors, (13756), 76 states have internal predecessors, (13756), 0 states have call successors, (0), 0 states 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 00:15:47,025 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 181.0) internal successors, (13756), 76 states have internal predecessors, (13756), 0 states have call successors, (0), 0 states 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 00:15:47,026 INFO L175 Difference]: Start difference. First operand has 775 places, 3686 transitions, 121315 flow. Second operand 75 states and 6011 transitions. [2023-08-30 00:15:47,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 5028 transitions, 168813 flow [2023-08-30 00:18:24,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 5028 transitions, 165357 flow, removed 1287 selfloop flow, removed 16 redundant places. [2023-08-30 00:18:24,551 INFO L231 Difference]: Finished difference. Result has 867 places, 4306 transitions, 147016 flow [2023-08-30 00:18:24,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=118310, PETRI_DIFFERENCE_MINUEND_PLACES=759, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1731, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1919, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=147016, PETRI_PLACES=867, PETRI_TRANSITIONS=4306} [2023-08-30 00:18:24,554 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 838 predicate places. [2023-08-30 00:18:24,554 INFO L495 AbstractCegarLoop]: Abstraction has has 867 places, 4306 transitions, 147016 flow [2023-08-30 00:18:24,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 75.63636363636364) internal successors, (1664), 22 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states 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 00:18:24,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:18:24,554 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:18:24,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 00:18:24,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 00:18:24,755 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:18:24,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:18:24,755 INFO L85 PathProgramCache]: Analyzing trace with hash -903342659, now seen corresponding path program 28 times [2023-08-30 00:18:24,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:18:24,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397449955] [2023-08-30 00:18:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:18:24,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:18:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:18:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:18:24,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:18:24,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397449955] [2023-08-30 00:18:24,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397449955] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:18:24,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404520863] [2023-08-30 00:18:24,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:18:24,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:18:24,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:18:24,969 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:18:24,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 00:18:25,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:18:25,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:18:25,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:18:25,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:18:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:18:25,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:18:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:18:25,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404520863] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:18:25,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:18:25,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-30 00:18:25,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267662799] [2023-08-30 00:18:25,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:18:25,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 00:18:25,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:18:25,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 00:18:25,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-08-30 00:18:25,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-08-30 00:18:25,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 867 places, 4306 transitions, 147016 flow. Second operand has 23 states, 23 states have (on average 75.47826086956522) internal successors, (1736), 23 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states 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 00:18:25,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:18:25,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-08-30 00:18:25,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15