./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 BEFORE --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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:58:08,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:58:08,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:58:08,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:58:08,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:58:08,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:58:08,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:58:08,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:58:08,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:58:08,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:58:08,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:58:08,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:58:08,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:58:08,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:58:08,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:58:08,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:58:08,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:58:08,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:58:08,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:58:08,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:58:08,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:58:08,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:58:08,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:58:08,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:58:08,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:58:08,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:58:08,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:58:08,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:58:08,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:58:08,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:58:08,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:58:08,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:58:08,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:58:08,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:58:08,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:58:08,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:58:08,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:58:08,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:58:08,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:58:08,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:58:08,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:58:08,282 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:58:08,301 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:58:08,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:58:08,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:58:08,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:58:08,303 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:58:08,303 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:58:08,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:58:08,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:58:08,304 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:58:08,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:58:08,305 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:58:08,305 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:58:08,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:58:08,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:58:08,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:58:08,306 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:58:08,306 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:58:08,306 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:58:08,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:58:08,307 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:58:08,307 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:58:08,307 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:58:08,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:58:08,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:58:08,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:58:08,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:58:08,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:58:08,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:58:08,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:58:08,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:58:08,309 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:58:08,309 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:58:08,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:58:08,310 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:58:08,310 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:58:08,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:58:08,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:58:08,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:58:08,647 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:58:08,648 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:58:08,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-09-01 02:58:09,919 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:58:10,151 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:58:10,152 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-09-01 02:58:10,157 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac430f2a5/b0b328b971e14c6b9e6d6f73555f694c/FLAG01419ddf3 [2023-09-01 02:58:10,168 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac430f2a5/b0b328b971e14c6b9e6d6f73555f694c [2023-09-01 02:58:10,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:58:10,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:58:10,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:58:10,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:58:10,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:58:10,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:58:10" (1/1) ... [2023-09-01 02:58:10,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44142ec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:58:10, skipping insertion in model container [2023-09-01 02:58:10,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:58:10" (1/1) ... [2023-09-01 02:58:10,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:58:10,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:58:10,333 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] [2023-09-01 02:58:10,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:58:10,351 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:58:10,373 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] [2023-09-01 02:58:10,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:58:10,391 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:58:10,391 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:58:10,397 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:58:10,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:58:10 WrapperNode [2023-09-01 02:58:10,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:58:10,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:58:10,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:58:10,400 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:58:10,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:58:10" (1/1) ... [2023-09-01 02:58:10,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:58:10" (1/1) ... [2023-09-01 02:58:10,436 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-09-01 02:58:10,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:58:10,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:58:10,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:58:10,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:58:10,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:58:10" (1/1) ... [2023-09-01 02:58:10,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:58:10" (1/1) ... [2023-09-01 02:58:10,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:58:10" (1/1) ... [2023-09-01 02:58:10,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:58:10" (1/1) ... [2023-09-01 02:58:10,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:58:10" (1/1) ... [2023-09-01 02:58:10,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:58:10" (1/1) ... [2023-09-01 02:58:10,464 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:58:10" (1/1) ... [2023-09-01 02:58:10,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:58:10" (1/1) ... [2023-09-01 02:58:10,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:58:10,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:58:10,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:58:10,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:58:10,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:58:10" (1/1) ... [2023-09-01 02:58:10,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:58:10,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:10,502 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) [2023-09-01 02:58:10,537 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 [2023-09-01 02:58:10,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:58:10,548 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:58:10,548 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:58:10,548 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:58:10,548 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:58:10,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 02:58:10,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:58:10,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 02:58:10,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:58:10,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:58:10,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:58:10,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:58:10,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 02:58:10,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:58:10,552 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:58:10,659 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:58:10,662 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:58:10,893 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:58:10,916 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:58:10,916 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 02:58:10,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:58:10 BoogieIcfgContainer [2023-09-01 02:58:10,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:58:10,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:58:10,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:58:10,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:58:10,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:58:10" (1/3) ... [2023-09-01 02:58:10,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6063e7bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:58:10, skipping insertion in model container [2023-09-01 02:58:10,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:58:10" (2/3) ... [2023-09-01 02:58:10,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6063e7bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:58:10, skipping insertion in model container [2023-09-01 02:58:10,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:58:10" (3/3) ... [2023-09-01 02:58:10,926 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-09-01 02:58:10,941 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:58:10,941 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 02:58:10,941 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:58:10,992 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 02:58:11,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 94 transitions, 204 flow [2023-09-01 02:58:11,082 INFO L130 PetriNetUnfolder]: 6/92 cut-off events. [2023-09-01 02:58:11,082 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:58:11,086 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. [2023-09-01 02:58:11,087 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 94 transitions, 204 flow [2023-09-01 02:58:11,090 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 88 transitions, 188 flow [2023-09-01 02:58:11,094 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:58:11,101 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 88 transitions, 188 flow [2023-09-01 02:58:11,104 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 88 transitions, 188 flow [2023-09-01 02:58:11,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 188 flow [2023-09-01 02:58:11,124 INFO L130 PetriNetUnfolder]: 6/88 cut-off events. [2023-09-01 02:58:11,125 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:58:11,126 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. [2023-09-01 02:58:11,127 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2023-09-01 02:58:13,917 INFO L134 LiptonReduction]: Checked pairs total: 779 [2023-09-01 02:58:13,917 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-09-01 02:58:13,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:58:13,935 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;@17f7172a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:58:13,935 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-09-01 02:58:13,936 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-09-01 02:58:13,936 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:58:13,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:13,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 02:58:13,937 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)] === [2023-09-01 02:58:13,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:13,941 INFO L85 PathProgramCache]: Analyzing trace with hash 371, now seen corresponding path program 1 times [2023-09-01 02:58:13,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:13,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291983119] [2023-09-01 02:58:13,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:13,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:14,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:14,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291983119] [2023-09-01 02:58:14,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291983119] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:58:14,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:58:14,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 02:58:14,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449781821] [2023-09-01 02:58:14,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:58:14,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 02:58:14,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:14,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 02:58:14,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 02:58:14,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-09-01 02:58:14,066 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) [2023-09-01 02:58:14,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:14,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-09-01 02:58:14,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:14,163 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2023-09-01 02:58:14,164 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 02:58:14,165 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. [2023-09-01 02:58:14,168 INFO L137 encePairwiseOnDemand]: 178/181 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-09-01 02:58:14,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-09-01 02:58:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 02:58:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 02:58:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 190 transitions. [2023-09-01 02:58:14,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5248618784530387 [2023-09-01 02:58:14,185 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 190 transitions. [2023-09-01 02:58:14,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 190 transitions. [2023-09-01 02:58:14,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:14,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 190 transitions. [2023-09-01 02:58:14,196 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) [2023-09-01 02:58:14,202 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) [2023-09-01 02:58:14,203 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) [2023-09-01 02:58:14,204 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 190 transitions. [2023-09-01 02:58:14,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-09-01 02:58:14,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 02:58:14,209 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-09-01 02:58:14,210 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} [2023-09-01 02:58:14,214 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-09-01 02:58:14,215 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-09-01 02:58:14,215 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) [2023-09-01 02:58:14,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:14,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:58:14,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 02:58:14,217 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)] === [2023-09-01 02:58:14,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:14,221 INFO L85 PathProgramCache]: Analyzing trace with hash 362648, now seen corresponding path program 1 times [2023-09-01 02:58:14,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:14,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451231146] [2023-09-01 02:58:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:14,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:14,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:14,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451231146] [2023-09-01 02:58:14,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451231146] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:58:14,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:58:14,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:58:14,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010335236] [2023-09-01 02:58:14,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:58:14,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:58:14,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:14,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:58:14,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:58:14,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 181 [2023-09-01 02:58:14,520 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) [2023-09-01 02:58:14,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:14,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 181 [2023-09-01 02:58:14,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:14,576 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2023-09-01 02:58:14,577 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 02:58:14,577 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. [2023-09-01 02:58:14,580 INFO L137 encePairwiseOnDemand]: 178/181 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-09-01 02:58:14,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-09-01 02:58:14,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:58:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:58:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2023-09-01 02:58:14,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714548802946593 [2023-09-01 02:58:14,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 256 transitions. [2023-09-01 02:58:14,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 256 transitions. [2023-09-01 02:58:14,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:14,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 256 transitions. [2023-09-01 02:58:14,589 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) [2023-09-01 02:58:14,592 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) [2023-09-01 02:58:14,592 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) [2023-09-01 02:58:14,593 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 256 transitions. [2023-09-01 02:58:14,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-09-01 02:58:14,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 02:58:14,594 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-09-01 02:58:14,594 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} [2023-09-01 02:58:14,595 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-09-01 02:58:14,595 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-09-01 02:58:14,596 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) [2023-09-01 02:58:14,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:14,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:58:14,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 02:58:14,597 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)] === [2023-09-01 02:58:14,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:14,600 INFO L85 PathProgramCache]: Analyzing trace with hash 362647, now seen corresponding path program 1 times [2023-09-01 02:58:14,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:14,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471345272] [2023-09-01 02:58:14,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:14,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:14,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:14,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471345272] [2023-09-01 02:58:14,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471345272] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:58:14,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:58:14,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:58:14,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756751656] [2023-09-01 02:58:14,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:58:14,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:58:14,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:14,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:58:14,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:58:14,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 181 [2023-09-01 02:58:14,712 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) [2023-09-01 02:58:14,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:14,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 181 [2023-09-01 02:58:14,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:14,759 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2023-09-01 02:58:14,760 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 02:58:14,761 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. [2023-09-01 02:58:14,762 INFO L137 encePairwiseOnDemand]: 178/181 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-09-01 02:58:14,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-09-01 02:58:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:58:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:58:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-09-01 02:58:14,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567219152854515 [2023-09-01 02:58:14,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-09-01 02:58:14,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-09-01 02:58:14,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:14,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-09-01 02:58:14,765 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) [2023-09-01 02:58:14,767 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) [2023-09-01 02:58:14,768 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) [2023-09-01 02:58:14,768 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 242 transitions. [2023-09-01 02:58:14,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-09-01 02:58:14,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:58:14,769 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-09-01 02:58:14,769 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} [2023-09-01 02:58:14,771 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-09-01 02:58:14,774 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-09-01 02:58:14,774 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) [2023-09-01 02:58:14,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:14,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:58:14,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 02:58:14,775 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)] === [2023-09-01 02:58:14,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:14,776 INFO L85 PathProgramCache]: Analyzing trace with hash 348510888, now seen corresponding path program 1 times [2023-09-01 02:58:14,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:14,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201083902] [2023-09-01 02:58:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:14,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:14,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:14,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201083902] [2023-09-01 02:58:14,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201083902] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:58:14,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:58:14,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:58:14,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318627668] [2023-09-01 02:58:14,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:58:14,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:58:14,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:14,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:58:14,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:58:14,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 181 [2023-09-01 02:58:14,895 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) [2023-09-01 02:58:14,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:14,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 181 [2023-09-01 02:58:14,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:14,928 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2023-09-01 02:58:14,928 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 02:58:14,929 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. [2023-09-01 02:58:14,929 INFO L137 encePairwiseOnDemand]: 179/181 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-09-01 02:58:14,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-09-01 02:58:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:58:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:58:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2023-09-01 02:58:14,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4198895027624309 [2023-09-01 02:58:14,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2023-09-01 02:58:14,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2023-09-01 02:58:14,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:14,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2023-09-01 02:58:14,932 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) [2023-09-01 02:58:14,933 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) [2023-09-01 02:58:14,934 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) [2023-09-01 02:58:14,934 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 228 transitions. [2023-09-01 02:58:14,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-09-01 02:58:14,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:58:14,935 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-09-01 02:58:14,935 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} [2023-09-01 02:58:14,936 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-09-01 02:58:14,936 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-09-01 02:58:14,937 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) [2023-09-01 02:58:14,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:14,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:58:14,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 02:58:14,937 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)] === [2023-09-01 02:58:14,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:14,938 INFO L85 PathProgramCache]: Analyzing trace with hash 348510889, now seen corresponding path program 1 times [2023-09-01 02:58:14,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:14,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590068568] [2023-09-01 02:58:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:14,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:15,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:15,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590068568] [2023-09-01 02:58:15,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590068568] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:58:15,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:58:15,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:58:15,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102433930] [2023-09-01 02:58:15,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:58:15,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:58:15,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:15,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:58:15,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:58:15,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 181 [2023-09-01 02:58:15,110 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) [2023-09-01 02:58:15,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:15,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 181 [2023-09-01 02:58:15,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:15,148 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2023-09-01 02:58:15,148 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 02:58:15,149 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. [2023-09-01 02:58:15,149 INFO L137 encePairwiseOnDemand]: 179/181 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-09-01 02:58:15,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-09-01 02:58:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:58:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:58:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-09-01 02:58:15,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45119705340699817 [2023-09-01 02:58:15,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-09-01 02:58:15,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-09-01 02:58:15,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:15,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-09-01 02:58:15,152 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) [2023-09-01 02:58:15,153 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) [2023-09-01 02:58:15,154 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) [2023-09-01 02:58:15,154 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 245 transitions. [2023-09-01 02:58:15,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-09-01 02:58:15,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:58:15,155 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-09-01 02:58:15,155 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} [2023-09-01 02:58:15,156 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-09-01 02:58:15,156 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-09-01 02:58:15,156 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) [2023-09-01 02:58:15,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:15,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:15,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 02:58:15,157 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)] === [2023-09-01 02:58:15,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:15,157 INFO L85 PathProgramCache]: Analyzing trace with hash -363417635, now seen corresponding path program 1 times [2023-09-01 02:58:15,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:15,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515212317] [2023-09-01 02:58:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:15,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:15,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:15,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515212317] [2023-09-01 02:58:15,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515212317] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:58:15,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:58:15,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:58:15,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93716145] [2023-09-01 02:58:15,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:58:15,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:58:15,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:58:15,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:58:15,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 181 [2023-09-01 02:58:15,248 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) [2023-09-01 02:58:15,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:15,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 181 [2023-09-01 02:58:15,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:15,288 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2023-09-01 02:58:15,288 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 02:58:15,289 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. [2023-09-01 02:58:15,289 INFO L137 encePairwiseOnDemand]: 177/181 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-09-01 02:58:15,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 104 flow [2023-09-01 02:58:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:58:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:58:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-09-01 02:58:15,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4972375690607735 [2023-09-01 02:58:15,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-09-01 02:58:15,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-09-01 02:58:15,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:15,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-09-01 02:58:15,292 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) [2023-09-01 02:58:15,293 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) [2023-09-01 02:58:15,294 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) [2023-09-01 02:58:15,294 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 270 transitions. [2023-09-01 02:58:15,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 104 flow [2023-09-01 02:58:15,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:58:15,295 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 52 flow [2023-09-01 02:58:15,295 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} [2023-09-01 02:58:15,296 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-09-01 02:58:15,296 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 52 flow [2023-09-01 02:58:15,297 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) [2023-09-01 02:58:15,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:15,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:15,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 02:58:15,297 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)] === [2023-09-01 02:58:15,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:15,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1993736684, now seen corresponding path program 1 times [2023-09-01 02:58:15,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:15,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312361952] [2023-09-01 02:58:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:15,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:15,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:15,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312361952] [2023-09-01 02:58:15,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312361952] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:58:15,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:58:15,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:58:15,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603162947] [2023-09-01 02:58:15,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:58:15,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:58:15,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:15,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:58:15,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:58:15,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:15,420 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) [2023-09-01 02:58:15,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:15,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:15,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:15,512 INFO L130 PetriNetUnfolder]: 68/137 cut-off events. [2023-09-01 02:58:15,512 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-09-01 02:58:15,513 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. [2023-09-01 02:58:15,514 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 19 selfloop transitions, 4 changer transitions 17/40 dead transitions. [2023-09-01 02:58:15,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 40 transitions, 189 flow [2023-09-01 02:58:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:58:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:58:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2023-09-01 02:58:15,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44659300184162065 [2023-09-01 02:58:15,516 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2023-09-01 02:58:15,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2023-09-01 02:58:15,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:15,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2023-09-01 02:58:15,518 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) [2023-09-01 02:58:15,519 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) [2023-09-01 02:58:15,520 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) [2023-09-01 02:58:15,520 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 52 flow. Second operand 6 states and 485 transitions. [2023-09-01 02:58:15,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 40 transitions, 189 flow [2023-09-01 02:58:15,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 40 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:58:15,522 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 79 flow [2023-09-01 02:58:15,522 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} [2023-09-01 02:58:15,522 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-09-01 02:58:15,523 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 79 flow [2023-09-01 02:58:15,523 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) [2023-09-01 02:58:15,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:15,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:15,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 02:58:15,524 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)] === [2023-09-01 02:58:15,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:15,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1088757098, now seen corresponding path program 2 times [2023-09-01 02:58:15,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:15,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260182259] [2023-09-01 02:58:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:15,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:15,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:15,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260182259] [2023-09-01 02:58:15,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260182259] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:15,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627757578] [2023-09-01 02:58:15,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:58:15,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:15,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:15,613 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) [2023-09-01 02:58:15,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 02:58:15,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:58:15,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:15,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:58:15,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:15,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:15,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627757578] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:15,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:58:15,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-09-01 02:58:15,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852490426] [2023-09-01 02:58:15,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:58:15,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:58:15,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:15,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:58:15,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:58:15,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 181 [2023-09-01 02:58:15,893 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) [2023-09-01 02:58:15,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:15,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 181 [2023-09-01 02:58:15,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:15,965 INFO L130 PetriNetUnfolder]: 49/92 cut-off events. [2023-09-01 02:58:15,966 INFO L131 PetriNetUnfolder]: For 58/64 co-relation queries the response was YES. [2023-09-01 02:58:15,966 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. [2023-09-01 02:58:15,967 INFO L137 encePairwiseOnDemand]: 177/181 looper letters, 24 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2023-09-01 02:58:15,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 173 flow [2023-09-01 02:58:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:58:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:58:15,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 335 transitions. [2023-09-01 02:58:15,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.462707182320442 [2023-09-01 02:58:15,968 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 335 transitions. [2023-09-01 02:58:15,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 335 transitions. [2023-09-01 02:58:15,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:15,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 335 transitions. [2023-09-01 02:58:15,969 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) [2023-09-01 02:58:15,970 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) [2023-09-01 02:58:15,971 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) [2023-09-01 02:58:15,971 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 79 flow. Second operand 4 states and 335 transitions. [2023-09-01 02:58:15,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 173 flow [2023-09-01 02:58:15,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 157 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 02:58:15,973 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 93 flow [2023-09-01 02:58:15,973 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} [2023-09-01 02:58:15,974 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-09-01 02:58:15,974 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 93 flow [2023-09-01 02:58:15,974 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) [2023-09-01 02:58:15,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:15,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:15,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:16,175 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 [2023-09-01 02:58:16,175 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)] === [2023-09-01 02:58:16,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:16,176 INFO L85 PathProgramCache]: Analyzing trace with hash -438644134, now seen corresponding path program 3 times [2023-09-01 02:58:16,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:16,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041263804] [2023-09-01 02:58:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:16,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:16,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:16,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041263804] [2023-09-01 02:58:16,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041263804] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:58:16,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:58:16,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:58:16,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726640771] [2023-09-01 02:58:16,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:58:16,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:58:16,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:16,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:58:16,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:58:16,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 181 [2023-09-01 02:58:16,300 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) [2023-09-01 02:58:16,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:16,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 181 [2023-09-01 02:58:16,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:16,380 INFO L130 PetriNetUnfolder]: 67/132 cut-off events. [2023-09-01 02:58:16,381 INFO L131 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2023-09-01 02:58:16,383 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. [2023-09-01 02:58:16,385 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 29 selfloop transitions, 6 changer transitions 2/37 dead transitions. [2023-09-01 02:58:16,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 230 flow [2023-09-01 02:58:16,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:58:16,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:58:16,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 408 transitions. [2023-09-01 02:58:16,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450828729281768 [2023-09-01 02:58:16,388 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 408 transitions. [2023-09-01 02:58:16,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 408 transitions. [2023-09-01 02:58:16,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:16,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 408 transitions. [2023-09-01 02:58:16,389 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) [2023-09-01 02:58:16,390 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) [2023-09-01 02:58:16,391 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) [2023-09-01 02:58:16,391 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 93 flow. Second operand 5 states and 408 transitions. [2023-09-01 02:58:16,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 230 flow [2023-09-01 02:58:16,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 225 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 02:58:16,396 INFO L231 Difference]: Finished difference. Result has 37 places, 22 transitions, 132 flow [2023-09-01 02:58:16,396 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} [2023-09-01 02:58:16,397 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-09-01 02:58:16,397 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 22 transitions, 132 flow [2023-09-01 02:58:16,397 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) [2023-09-01 02:58:16,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:16,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:16,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 02:58:16,398 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)] === [2023-09-01 02:58:16,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:16,399 INFO L85 PathProgramCache]: Analyzing trace with hash 384552564, now seen corresponding path program 4 times [2023-09-01 02:58:16,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:16,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039220123] [2023-09-01 02:58:16,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:16,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:16,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:16,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039220123] [2023-09-01 02:58:16,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039220123] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:16,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173044550] [2023-09-01 02:58:16,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:58:16,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:16,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:16,557 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) [2023-09-01 02:58:16,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 02:58:16,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:58:16,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:16,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:58:16,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:16,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:16,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173044550] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:16,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:16,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-09-01 02:58:16,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695430209] [2023-09-01 02:58:16,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:16,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:58:16,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:16,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:58:16,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:58:16,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:16,801 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) [2023-09-01 02:58:16,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:16,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:16,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:16,906 INFO L130 PetriNetUnfolder]: 82/157 cut-off events. [2023-09-01 02:58:16,907 INFO L131 PetriNetUnfolder]: For 423/423 co-relation queries the response was YES. [2023-09-01 02:58:16,907 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. [2023-09-01 02:58:16,908 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 33 selfloop transitions, 11 changer transitions 2/46 dead transitions. [2023-09-01 02:58:16,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 334 flow [2023-09-01 02:58:16,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 02:58:16,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 02:58:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 562 transitions. [2023-09-01 02:58:16,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435674822415154 [2023-09-01 02:58:16,911 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 562 transitions. [2023-09-01 02:58:16,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 562 transitions. [2023-09-01 02:58:16,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:16,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 562 transitions. [2023-09-01 02:58:16,913 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) [2023-09-01 02:58:16,914 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) [2023-09-01 02:58:16,915 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) [2023-09-01 02:58:16,915 INFO L175 Difference]: Start difference. First operand has 37 places, 22 transitions, 132 flow. Second operand 7 states and 562 transitions. [2023-09-01 02:58:16,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 334 flow [2023-09-01 02:58:16,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 317 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 02:58:16,920 INFO L231 Difference]: Finished difference. Result has 42 places, 26 transitions, 180 flow [2023-09-01 02:58:16,921 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} [2023-09-01 02:58:16,923 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-09-01 02:58:16,923 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 180 flow [2023-09-01 02:58:16,924 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) [2023-09-01 02:58:16,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:16,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:16,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:17,137 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 [2023-09-01 02:58:17,137 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)] === [2023-09-01 02:58:17,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:17,138 INFO L85 PathProgramCache]: Analyzing trace with hash 309110386, now seen corresponding path program 5 times [2023-09-01 02:58:17,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:17,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516918777] [2023-09-01 02:58:17,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:17,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:17,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:17,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516918777] [2023-09-01 02:58:17,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516918777] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:17,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893467852] [2023-09-01 02:58:17,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:58:17,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:17,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:17,230 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) [2023-09-01 02:58:17,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 02:58:17,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:58:17,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:17,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:58:17,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:17,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:17,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893467852] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:17,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:17,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 02:58:17,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025579528] [2023-09-01 02:58:17,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:17,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:58:17,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:17,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:58:17,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:58:17,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:17,446 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) [2023-09-01 02:58:17,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:17,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:17,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:17,526 INFO L130 PetriNetUnfolder]: 76/143 cut-off events. [2023-09-01 02:58:17,527 INFO L131 PetriNetUnfolder]: For 487/487 co-relation queries the response was YES. [2023-09-01 02:58:17,527 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. [2023-09-01 02:58:17,528 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 25 selfloop transitions, 11 changer transitions 2/38 dead transitions. [2023-09-01 02:58:17,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 313 flow [2023-09-01 02:58:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:58:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:58:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 403 transitions. [2023-09-01 02:58:17,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453038674033149 [2023-09-01 02:58:17,530 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 403 transitions. [2023-09-01 02:58:17,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 403 transitions. [2023-09-01 02:58:17,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:17,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 403 transitions. [2023-09-01 02:58:17,532 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) [2023-09-01 02:58:17,533 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) [2023-09-01 02:58:17,533 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) [2023-09-01 02:58:17,534 INFO L175 Difference]: Start difference. First operand has 42 places, 26 transitions, 180 flow. Second operand 5 states and 403 transitions. [2023-09-01 02:58:17,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 313 flow [2023-09-01 02:58:17,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 298 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 02:58:17,536 INFO L231 Difference]: Finished difference. Result has 45 places, 26 transitions, 190 flow [2023-09-01 02:58:17,537 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} [2023-09-01 02:58:17,537 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-09-01 02:58:17,537 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 26 transitions, 190 flow [2023-09-01 02:58:17,538 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) [2023-09-01 02:58:17,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:17,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:17,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:17,743 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 [2023-09-01 02:58:17,744 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)] === [2023-09-01 02:58:17,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:17,744 INFO L85 PathProgramCache]: Analyzing trace with hash -86748654, now seen corresponding path program 1 times [2023-09-01 02:58:17,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:17,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398916016] [2023-09-01 02:58:17,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:17,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:17,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:17,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398916016] [2023-09-01 02:58:17,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398916016] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:17,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021097498] [2023-09-01 02:58:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:17,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:17,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:17,909 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) [2023-09-01 02:58:17,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 02:58:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:17,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:58:17,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:18,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:18,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021097498] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:18,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:18,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 5 [2023-09-01 02:58:18,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505492487] [2023-09-01 02:58:18,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:18,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:58:18,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:18,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:58:18,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:58:18,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-09-01 02:58:18,078 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) [2023-09-01 02:58:18,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:18,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-09-01 02:58:18,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:18,154 INFO L130 PetriNetUnfolder]: 122/230 cut-off events. [2023-09-01 02:58:18,155 INFO L131 PetriNetUnfolder]: For 644/658 co-relation queries the response was YES. [2023-09-01 02:58:18,156 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. [2023-09-01 02:58:18,157 INFO L137 encePairwiseOnDemand]: 177/181 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2023-09-01 02:58:18,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 395 flow [2023-09-01 02:58:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:58:18,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:58:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 355 transitions. [2023-09-01 02:58:18,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4903314917127072 [2023-09-01 02:58:18,159 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 355 transitions. [2023-09-01 02:58:18,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 355 transitions. [2023-09-01 02:58:18,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:18,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 355 transitions. [2023-09-01 02:58:18,160 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) [2023-09-01 02:58:18,161 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) [2023-09-01 02:58:18,161 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) [2023-09-01 02:58:18,162 INFO L175 Difference]: Start difference. First operand has 45 places, 26 transitions, 190 flow. Second operand 4 states and 355 transitions. [2023-09-01 02:58:18,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 395 flow [2023-09-01 02:58:18,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 358 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-09-01 02:58:18,165 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 269 flow [2023-09-01 02:58:18,165 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} [2023-09-01 02:58:18,166 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-09-01 02:58:18,166 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 269 flow [2023-09-01 02:58:18,166 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) [2023-09-01 02:58:18,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:18,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:18,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:18,375 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 [2023-09-01 02:58:18,376 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)] === [2023-09-01 02:58:18,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:18,376 INFO L85 PathProgramCache]: Analyzing trace with hash -593314255, now seen corresponding path program 2 times [2023-09-01 02:58:18,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:18,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12367383] [2023-09-01 02:58:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:18,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:18,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:18,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12367383] [2023-09-01 02:58:18,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12367383] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:18,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737848176] [2023-09-01 02:58:18,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:58:18,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:18,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:18,522 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) [2023-09-01 02:58:18,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 02:58:18,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:58:18,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:18,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:58:18,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:18,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:18,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737848176] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:18,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:18,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-09-01 02:58:18,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189424903] [2023-09-01 02:58:18,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:18,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 02:58:18,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:18,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 02:58:18,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-09-01 02:58:18,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:18,810 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) [2023-09-01 02:58:18,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:18,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:18,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:19,579 INFO L130 PetriNetUnfolder]: 344/706 cut-off events. [2023-09-01 02:58:19,579 INFO L131 PetriNetUnfolder]: For 1635/1635 co-relation queries the response was YES. [2023-09-01 02:58:19,582 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. [2023-09-01 02:58:19,585 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 110 selfloop transitions, 63 changer transitions 33/206 dead transitions. [2023-09-01 02:58:19,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 206 transitions, 1646 flow [2023-09-01 02:58:19,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 02:58:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 02:58:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2399 transitions. [2023-09-01 02:58:19,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441804788213628 [2023-09-01 02:58:19,592 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2399 transitions. [2023-09-01 02:58:19,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2399 transitions. [2023-09-01 02:58:19,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:19,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2399 transitions. [2023-09-01 02:58:19,597 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) [2023-09-01 02:58:19,605 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) [2023-09-01 02:58:19,606 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) [2023-09-01 02:58:19,606 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 269 flow. Second operand 30 states and 2399 transitions. [2023-09-01 02:58:19,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 206 transitions, 1646 flow [2023-09-01 02:58:19,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 206 transitions, 1604 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-09-01 02:58:19,614 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 973 flow [2023-09-01 02:58:19,615 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} [2023-09-01 02:58:19,615 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2023-09-01 02:58:19,615 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 973 flow [2023-09-01 02:58:19,616 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) [2023-09-01 02:58:19,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:19,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:19,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:19,829 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 [2023-09-01 02:58:19,830 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)] === [2023-09-01 02:58:19,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:19,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1208063949, now seen corresponding path program 3 times [2023-09-01 02:58:19,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:19,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118987188] [2023-09-01 02:58:19,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:19,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:19,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:19,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118987188] [2023-09-01 02:58:19,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118987188] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:19,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56072531] [2023-09-01 02:58:19,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:58:19,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:19,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:19,943 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) [2023-09-01 02:58:19,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 02:58:20,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 02:58:20,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:20,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:58:20,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:20,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:20,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56072531] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:20,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:20,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-09-01 02:58:20,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573860390] [2023-09-01 02:58:20,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:20,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:58:20,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:20,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:58:20,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:58:20,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:20,183 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) [2023-09-01 02:58:20,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:20,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:20,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:20,517 INFO L130 PetriNetUnfolder]: 319/640 cut-off events. [2023-09-01 02:58:20,517 INFO L131 PetriNetUnfolder]: For 4621/4621 co-relation queries the response was YES. [2023-09-01 02:58:20,520 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. [2023-09-01 02:58:20,523 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 103 selfloop transitions, 35 changer transitions 0/138 dead transitions. [2023-09-01 02:58:20,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 138 transitions, 1616 flow [2023-09-01 02:58:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 02:58:20,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 02:58:20,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 809 transitions. [2023-09-01 02:58:20,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696132596685084 [2023-09-01 02:58:20,526 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 809 transitions. [2023-09-01 02:58:20,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 809 transitions. [2023-09-01 02:58:20,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:20,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 809 transitions. [2023-09-01 02:58:20,528 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) [2023-09-01 02:58:20,530 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) [2023-09-01 02:58:20,531 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) [2023-09-01 02:58:20,531 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 973 flow. Second operand 10 states and 809 transitions. [2023-09-01 02:58:20,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 138 transitions, 1616 flow [2023-09-01 02:58:20,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 138 transitions, 1229 flow, removed 156 selfloop flow, removed 7 redundant places. [2023-09-01 02:58:20,550 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 871 flow [2023-09-01 02:58:20,551 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} [2023-09-01 02:58:20,551 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2023-09-01 02:58:20,551 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 871 flow [2023-09-01 02:58:20,552 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) [2023-09-01 02:58:20,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:20,552 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:20,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:20,757 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 [2023-09-01 02:58:20,757 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)] === [2023-09-01 02:58:20,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:20,758 INFO L85 PathProgramCache]: Analyzing trace with hash 617588799, now seen corresponding path program 4 times [2023-09-01 02:58:20,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:20,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154854744] [2023-09-01 02:58:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:20,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:20,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:20,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154854744] [2023-09-01 02:58:20,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154854744] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:20,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34440713] [2023-09-01 02:58:20,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:58:20,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:20,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:20,906 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) [2023-09-01 02:58:20,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 02:58:20,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:58:20,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:20,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:58:20,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:21,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:21,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34440713] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:21,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:21,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-09-01 02:58:21,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687565867] [2023-09-01 02:58:21,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:21,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 02:58:21,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:21,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 02:58:21,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-09-01 02:58:21,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:21,228 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) [2023-09-01 02:58:21,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:21,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:21,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:21,865 INFO L130 PetriNetUnfolder]: 403/794 cut-off events. [2023-09-01 02:58:21,865 INFO L131 PetriNetUnfolder]: For 9150/9150 co-relation queries the response was YES. [2023-09-01 02:58:21,868 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. [2023-09-01 02:58:21,874 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 126 selfloop transitions, 66 changer transitions 0/192 dead transitions. [2023-09-01 02:58:21,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 192 transitions, 1916 flow [2023-09-01 02:58:21,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 02:58:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 02:58:21,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1447 transitions. [2023-09-01 02:58:21,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44413750767341925 [2023-09-01 02:58:21,881 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1447 transitions. [2023-09-01 02:58:21,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1447 transitions. [2023-09-01 02:58:21,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:21,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1447 transitions. [2023-09-01 02:58:21,886 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) [2023-09-01 02:58:21,891 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) [2023-09-01 02:58:21,892 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) [2023-09-01 02:58:21,892 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 871 flow. Second operand 18 states and 1447 transitions. [2023-09-01 02:58:21,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 192 transitions, 1916 flow [2023-09-01 02:58:21,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 192 transitions, 1769 flow, removed 55 selfloop flow, removed 4 redundant places. [2023-09-01 02:58:21,931 INFO L231 Difference]: Finished difference. Result has 106 places, 128 transitions, 1374 flow [2023-09-01 02:58:21,932 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} [2023-09-01 02:58:21,932 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2023-09-01 02:58:21,932 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 128 transitions, 1374 flow [2023-09-01 02:58:21,933 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) [2023-09-01 02:58:21,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:21,933 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:21,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:22,138 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 [2023-09-01 02:58:22,139 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)] === [2023-09-01 02:58:22,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:22,139 INFO L85 PathProgramCache]: Analyzing trace with hash 56336925, now seen corresponding path program 5 times [2023-09-01 02:58:22,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:22,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472570443] [2023-09-01 02:58:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:22,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:22,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:22,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472570443] [2023-09-01 02:58:22,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472570443] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:22,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544029816] [2023-09-01 02:58:22,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:58:22,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:22,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:22,265 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) [2023-09-01 02:58:22,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 02:58:22,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:58:22,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:22,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:58:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:22,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:22,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544029816] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:22,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:22,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-09-01 02:58:22,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517575961] [2023-09-01 02:58:22,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:22,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 02:58:22,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:22,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 02:58:22,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-09-01 02:58:22,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:22,631 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) [2023-09-01 02:58:22,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:22,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:22,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:23,194 INFO L130 PetriNetUnfolder]: 486/967 cut-off events. [2023-09-01 02:58:23,195 INFO L131 PetriNetUnfolder]: For 19244/19244 co-relation queries the response was YES. [2023-09-01 02:58:23,199 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. [2023-09-01 02:58:23,205 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 88 selfloop transitions, 105 changer transitions 5/198 dead transitions. [2023-09-01 02:58:23,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 198 transitions, 2299 flow [2023-09-01 02:58:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 02:58:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 02:58:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1042 transitions. [2023-09-01 02:58:23,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44283892902677435 [2023-09-01 02:58:23,208 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1042 transitions. [2023-09-01 02:58:23,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1042 transitions. [2023-09-01 02:58:23,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:23,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1042 transitions. [2023-09-01 02:58:23,210 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) [2023-09-01 02:58:23,213 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) [2023-09-01 02:58:23,213 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) [2023-09-01 02:58:23,213 INFO L175 Difference]: Start difference. First operand has 106 places, 128 transitions, 1374 flow. Second operand 13 states and 1042 transitions. [2023-09-01 02:58:23,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 198 transitions, 2299 flow [2023-09-01 02:58:23,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 198 transitions, 2025 flow, removed 103 selfloop flow, removed 7 redundant places. [2023-09-01 02:58:23,257 INFO L231 Difference]: Finished difference. Result has 117 places, 153 transitions, 1824 flow [2023-09-01 02:58:23,257 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} [2023-09-01 02:58:23,258 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 88 predicate places. [2023-09-01 02:58:23,258 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 153 transitions, 1824 flow [2023-09-01 02:58:23,258 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) [2023-09-01 02:58:23,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:23,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:23,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:23,469 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 [2023-09-01 02:58:23,469 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)] === [2023-09-01 02:58:23,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:23,469 INFO L85 PathProgramCache]: Analyzing trace with hash -398260725, now seen corresponding path program 6 times [2023-09-01 02:58:23,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:23,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302346249] [2023-09-01 02:58:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:23,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:23,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:23,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302346249] [2023-09-01 02:58:23,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302346249] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:23,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169872389] [2023-09-01 02:58:23,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 02:58:23,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:23,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:23,623 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) [2023-09-01 02:58:23,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 02:58:23,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 02:58:23,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:23,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:58:23,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:23,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:23,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169872389] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:23,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:23,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-09-01 02:58:23,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358627739] [2023-09-01 02:58:23,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:23,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 02:58:23,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:23,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 02:58:23,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-09-01 02:58:23,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:23,932 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) [2023-09-01 02:58:23,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:23,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:23,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:24,869 INFO L130 PetriNetUnfolder]: 725/1434 cut-off events. [2023-09-01 02:58:24,869 INFO L131 PetriNetUnfolder]: For 43138/43138 co-relation queries the response was YES. [2023-09-01 02:58:24,878 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. [2023-09-01 02:58:24,888 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 209 selfloop transitions, 125 changer transitions 3/337 dead transitions. [2023-09-01 02:58:24,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 337 transitions, 4433 flow [2023-09-01 02:58:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 02:58:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 02:58:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1931 transitions. [2023-09-01 02:58:24,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44452117863720075 [2023-09-01 02:58:24,892 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1931 transitions. [2023-09-01 02:58:24,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1931 transitions. [2023-09-01 02:58:24,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:24,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1931 transitions. [2023-09-01 02:58:24,896 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) [2023-09-01 02:58:24,901 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) [2023-09-01 02:58:24,902 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) [2023-09-01 02:58:24,902 INFO L175 Difference]: Start difference. First operand has 117 places, 153 transitions, 1824 flow. Second operand 24 states and 1931 transitions. [2023-09-01 02:58:24,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 337 transitions, 4433 flow [2023-09-01 02:58:25,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 337 transitions, 4036 flow, removed 181 selfloop flow, removed 5 redundant places. [2023-09-01 02:58:25,007 INFO L231 Difference]: Finished difference. Result has 148 places, 223 transitions, 3199 flow [2023-09-01 02:58:25,007 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} [2023-09-01 02:58:25,007 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 119 predicate places. [2023-09-01 02:58:25,008 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 223 transitions, 3199 flow [2023-09-01 02:58:25,008 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) [2023-09-01 02:58:25,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:25,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:25,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:25,214 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 [2023-09-01 02:58:25,214 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)] === [2023-09-01 02:58:25,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:25,214 INFO L85 PathProgramCache]: Analyzing trace with hash 883114373, now seen corresponding path program 7 times [2023-09-01 02:58:25,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:25,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23087193] [2023-09-01 02:58:25,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:25,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:25,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:25,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23087193] [2023-09-01 02:58:25,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23087193] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:25,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322528776] [2023-09-01 02:58:25,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 02:58:25,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:25,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:25,354 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) [2023-09-01 02:58:25,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 02:58:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:25,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:58:25,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:25,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:25,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322528776] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:25,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:25,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-09-01 02:58:25,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84376705] [2023-09-01 02:58:25,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:25,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 02:58:25,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:25,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 02:58:25,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-09-01 02:58:25,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:25,650 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) [2023-09-01 02:58:25,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:25,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:25,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:26,606 INFO L130 PetriNetUnfolder]: 860/1731 cut-off events. [2023-09-01 02:58:26,606 INFO L131 PetriNetUnfolder]: For 65810/65810 co-relation queries the response was YES. [2023-09-01 02:58:26,618 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. [2023-09-01 02:58:26,635 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 157 selfloop transitions, 182 changer transitions 5/344 dead transitions. [2023-09-01 02:58:26,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 344 transitions, 5761 flow [2023-09-01 02:58:26,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 02:58:26,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 02:58:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1746 transitions. [2023-09-01 02:58:26,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384731290808639 [2023-09-01 02:58:26,639 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1746 transitions. [2023-09-01 02:58:26,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1746 transitions. [2023-09-01 02:58:26,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:26,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1746 transitions. [2023-09-01 02:58:26,643 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) [2023-09-01 02:58:26,648 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) [2023-09-01 02:58:26,650 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) [2023-09-01 02:58:26,651 INFO L175 Difference]: Start difference. First operand has 148 places, 223 transitions, 3199 flow. Second operand 22 states and 1746 transitions. [2023-09-01 02:58:26,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 344 transitions, 5761 flow [2023-09-01 02:58:26,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 344 transitions, 5074 flow, removed 308 selfloop flow, removed 8 redundant places. [2023-09-01 02:58:26,806 INFO L231 Difference]: Finished difference. Result has 170 places, 272 transitions, 4211 flow [2023-09-01 02:58:26,807 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} [2023-09-01 02:58:26,807 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 141 predicate places. [2023-09-01 02:58:26,807 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 272 transitions, 4211 flow [2023-09-01 02:58:26,808 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) [2023-09-01 02:58:26,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:26,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:26,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:27,017 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 [2023-09-01 02:58:27,017 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)] === [2023-09-01 02:58:27,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:27,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1768505241, now seen corresponding path program 8 times [2023-09-01 02:58:27,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:27,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844420986] [2023-09-01 02:58:27,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:27,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:27,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:27,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844420986] [2023-09-01 02:58:27,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844420986] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:27,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403137076] [2023-09-01 02:58:27,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:58:27,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:27,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:27,136 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) [2023-09-01 02:58:27,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 02:58:27,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:58:27,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:27,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:58:27,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:27,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:27,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403137076] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:27,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:27,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-09-01 02:58:27,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64326411] [2023-09-01 02:58:27,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:27,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 02:58:27,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 02:58:27,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-09-01 02:58:27,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:27,437 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) [2023-09-01 02:58:27,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:27,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:27,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:28,202 INFO L130 PetriNetUnfolder]: 828/1658 cut-off events. [2023-09-01 02:58:28,203 INFO L131 PetriNetUnfolder]: For 75394/75394 co-relation queries the response was YES. [2023-09-01 02:58:28,214 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. [2023-09-01 02:58:28,227 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 154 selfloop transitions, 146 changer transitions 3/303 dead transitions. [2023-09-01 02:58:28,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 303 transitions, 4850 flow [2023-09-01 02:58:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 02:58:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 02:58:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1039 transitions. [2023-09-01 02:58:28,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4415639609009775 [2023-09-01 02:58:28,229 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1039 transitions. [2023-09-01 02:58:28,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1039 transitions. [2023-09-01 02:58:28,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:28,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1039 transitions. [2023-09-01 02:58:28,232 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) [2023-09-01 02:58:28,234 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) [2023-09-01 02:58:28,235 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) [2023-09-01 02:58:28,235 INFO L175 Difference]: Start difference. First operand has 170 places, 272 transitions, 4211 flow. Second operand 13 states and 1039 transitions. [2023-09-01 02:58:28,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 303 transitions, 4850 flow [2023-09-01 02:58:28,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 303 transitions, 4646 flow, removed 101 selfloop flow, removed 2 redundant places. [2023-09-01 02:58:28,482 INFO L231 Difference]: Finished difference. Result has 181 places, 265 transitions, 4274 flow [2023-09-01 02:58:28,483 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} [2023-09-01 02:58:28,483 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 152 predicate places. [2023-09-01 02:58:28,483 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 265 transitions, 4274 flow [2023-09-01 02:58:28,484 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) [2023-09-01 02:58:28,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:28,484 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:28,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 02:58:28,690 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 [2023-09-01 02:58:28,690 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)] === [2023-09-01 02:58:28,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:28,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1245012087, now seen corresponding path program 9 times [2023-09-01 02:58:28,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:28,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12085280] [2023-09-01 02:58:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:28,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:28,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:28,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12085280] [2023-09-01 02:58:28,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12085280] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:28,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593432757] [2023-09-01 02:58:28,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:58:28,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:28,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:28,839 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) [2023-09-01 02:58:28,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 02:58:28,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 02:58:28,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:28,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:58:28,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:58:28,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:58:29,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593432757] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:29,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:29,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-09-01 02:58:29,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305452871] [2023-09-01 02:58:29,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:29,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 02:58:29,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:29,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 02:58:29,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-09-01 02:58:29,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-09-01 02:58:29,068 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) [2023-09-01 02:58:29,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:29,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-09-01 02:58:29,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:29,681 INFO L130 PetriNetUnfolder]: 999/2055 cut-off events. [2023-09-01 02:58:29,681 INFO L131 PetriNetUnfolder]: For 96327/96337 co-relation queries the response was YES. [2023-09-01 02:58:29,696 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. [2023-09-01 02:58:29,710 INFO L137 encePairwiseOnDemand]: 177/181 looper letters, 226 selfloop transitions, 99 changer transitions 54/388 dead transitions. [2023-09-01 02:58:29,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 388 transitions, 7083 flow [2023-09-01 02:58:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:58:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:58:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 446 transitions. [2023-09-01 02:58:29,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49281767955801103 [2023-09-01 02:58:29,714 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 446 transitions. [2023-09-01 02:58:29,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 446 transitions. [2023-09-01 02:58:29,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:29,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 446 transitions. [2023-09-01 02:58:29,715 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) [2023-09-01 02:58:29,716 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) [2023-09-01 02:58:29,716 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) [2023-09-01 02:58:29,716 INFO L175 Difference]: Start difference. First operand has 181 places, 265 transitions, 4274 flow. Second operand 5 states and 446 transitions. [2023-09-01 02:58:29,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 388 transitions, 7083 flow [2023-09-01 02:58:29,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 388 transitions, 6769 flow, removed 36 selfloop flow, removed 14 redundant places. [2023-09-01 02:58:29,962 INFO L231 Difference]: Finished difference. Result has 173 places, 282 transitions, 4926 flow [2023-09-01 02:58:29,962 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} [2023-09-01 02:58:29,962 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 144 predicate places. [2023-09-01 02:58:29,963 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 282 transitions, 4926 flow [2023-09-01 02:58:29,963 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) [2023-09-01 02:58:29,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:29,963 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:29,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-09-01 02:58:30,169 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 [2023-09-01 02:58:30,169 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)] === [2023-09-01 02:58:30,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:30,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1748741396, now seen corresponding path program 10 times [2023-09-01 02:58:30,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:30,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168479269] [2023-09-01 02:58:30,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:30,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:30,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:30,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168479269] [2023-09-01 02:58:30,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168479269] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:30,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375452254] [2023-09-01 02:58:30,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:58:30,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:30,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:30,339 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) [2023-09-01 02:58:30,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 02:58:30,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:58:30,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:30,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:58:30,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:30,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:30,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375452254] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:30,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:30,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 02:58:30,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285432881] [2023-09-01 02:58:30,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:30,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 02:58:30,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 02:58:30,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-09-01 02:58:30,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:30,734 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) [2023-09-01 02:58:30,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:30,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:30,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:32,123 INFO L130 PetriNetUnfolder]: 1816/3701 cut-off events. [2023-09-01 02:58:32,124 INFO L131 PetriNetUnfolder]: For 177730/177730 co-relation queries the response was YES. [2023-09-01 02:58:32,149 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. [2023-09-01 02:58:32,176 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 491 selfloop transitions, 158 changer transitions 7/656 dead transitions. [2023-09-01 02:58:32,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 656 transitions, 12060 flow [2023-09-01 02:58:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 02:58:32,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 02:58:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1376 transitions. [2023-09-01 02:58:32,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447188820279493 [2023-09-01 02:58:32,180 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1376 transitions. [2023-09-01 02:58:32,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1376 transitions. [2023-09-01 02:58:32,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:32,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1376 transitions. [2023-09-01 02:58:32,184 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) [2023-09-01 02:58:32,188 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) [2023-09-01 02:58:32,189 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) [2023-09-01 02:58:32,189 INFO L175 Difference]: Start difference. First operand has 173 places, 282 transitions, 4926 flow. Second operand 17 states and 1376 transitions. [2023-09-01 02:58:32,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 656 transitions, 12060 flow [2023-09-01 02:58:32,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 656 transitions, 11811 flow, removed 119 selfloop flow, removed 5 redundant places. [2023-09-01 02:58:32,793 INFO L231 Difference]: Finished difference. Result has 184 places, 400 transitions, 7450 flow [2023-09-01 02:58:32,793 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} [2023-09-01 02:58:32,794 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2023-09-01 02:58:32,794 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 400 transitions, 7450 flow [2023-09-01 02:58:32,794 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) [2023-09-01 02:58:32,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:32,795 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:32,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:32,999 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 [2023-09-01 02:58:33,000 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)] === [2023-09-01 02:58:33,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:33,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2037253858, now seen corresponding path program 11 times [2023-09-01 02:58:33,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:33,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157363094] [2023-09-01 02:58:33,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:33,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:33,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:33,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157363094] [2023-09-01 02:58:33,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157363094] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:33,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035818126] [2023-09-01 02:58:33,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:58:33,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:33,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:33,153 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) [2023-09-01 02:58:33,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 02:58:33,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 02:58:33,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:33,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:58:33,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:33,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:33,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035818126] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:33,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:33,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 02:58:33,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273073081] [2023-09-01 02:58:33,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:33,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:58:33,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:33,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:58:33,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:58:33,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:33,555 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) [2023-09-01 02:58:33,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:33,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:33,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:35,505 INFO L130 PetriNetUnfolder]: 1962/3981 cut-off events. [2023-09-01 02:58:35,506 INFO L131 PetriNetUnfolder]: For 187772/187772 co-relation queries the response was YES. [2023-09-01 02:58:35,591 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. [2023-09-01 02:58:35,614 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 557 selfloop transitions, 212 changer transitions 7/776 dead transitions. [2023-09-01 02:58:35,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 776 transitions, 14484 flow [2023-09-01 02:58:35,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 02:58:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 02:58:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2806 transitions. [2023-09-01 02:58:35,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429360694554065 [2023-09-01 02:58:35,628 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2806 transitions. [2023-09-01 02:58:35,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2806 transitions. [2023-09-01 02:58:35,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:35,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2806 transitions. [2023-09-01 02:58:35,637 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) [2023-09-01 02:58:35,647 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) [2023-09-01 02:58:35,648 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) [2023-09-01 02:58:35,649 INFO L175 Difference]: Start difference. First operand has 184 places, 400 transitions, 7450 flow. Second operand 35 states and 2806 transitions. [2023-09-01 02:58:35,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 776 transitions, 14484 flow [2023-09-01 02:58:36,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 776 transitions, 14061 flow, removed 191 selfloop flow, removed 4 redundant places. [2023-09-01 02:58:36,320 INFO L231 Difference]: Finished difference. Result has 225 places, 468 transitions, 9306 flow [2023-09-01 02:58:36,321 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} [2023-09-01 02:58:36,321 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 196 predicate places. [2023-09-01 02:58:36,321 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 468 transitions, 9306 flow [2023-09-01 02:58:36,321 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) [2023-09-01 02:58:36,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:36,322 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:36,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:36,522 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 [2023-09-01 02:58:36,522 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)] === [2023-09-01 02:58:36,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:36,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1267397294, now seen corresponding path program 12 times [2023-09-01 02:58:36,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:36,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837961426] [2023-09-01 02:58:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:36,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:36,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:36,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837961426] [2023-09-01 02:58:36,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837961426] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:36,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155515306] [2023-09-01 02:58:36,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 02:58:36,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:36,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:36,797 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) [2023-09-01 02:58:36,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 02:58:36,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 02:58:36,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:36,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:58:36,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:37,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:37,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155515306] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:37,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:37,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-09-01 02:58:37,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428029412] [2023-09-01 02:58:37,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:37,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 02:58:37,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:37,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 02:58:37,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-09-01 02:58:37,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:37,290 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) [2023-09-01 02:58:37,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:37,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:37,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:40,523 INFO L130 PetriNetUnfolder]: 2426/4956 cut-off events. [2023-09-01 02:58:40,523 INFO L131 PetriNetUnfolder]: For 292889/292889 co-relation queries the response was YES. [2023-09-01 02:58:40,552 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. [2023-09-01 02:58:40,578 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 332 selfloop transitions, 638 changer transitions 30/1000 dead transitions. [2023-09-01 02:58:40,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 1000 transitions, 21212 flow [2023-09-01 02:58:40,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-09-01 02:58:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-09-01 02:58:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4768 transitions. [2023-09-01 02:58:40,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390423572744015 [2023-09-01 02:58:40,585 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4768 transitions. [2023-09-01 02:58:40,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4768 transitions. [2023-09-01 02:58:40,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:40,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4768 transitions. [2023-09-01 02:58:40,593 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) [2023-09-01 02:58:40,603 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) [2023-09-01 02:58:40,605 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) [2023-09-01 02:58:40,605 INFO L175 Difference]: Start difference. First operand has 225 places, 468 transitions, 9306 flow. Second operand 60 states and 4768 transitions. [2023-09-01 02:58:40,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 1000 transitions, 21212 flow [2023-09-01 02:58:41,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1000 transitions, 20341 flow, removed 376 selfloop flow, removed 10 redundant places. [2023-09-01 02:58:41,858 INFO L231 Difference]: Finished difference. Result has 294 places, 752 transitions, 17161 flow [2023-09-01 02:58:41,859 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} [2023-09-01 02:58:41,859 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 265 predicate places. [2023-09-01 02:58:41,859 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 752 transitions, 17161 flow [2023-09-01 02:58:41,860 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) [2023-09-01 02:58:41,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:41,860 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:41,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:42,060 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 [2023-09-01 02:58:42,061 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)] === [2023-09-01 02:58:42,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:42,061 INFO L85 PathProgramCache]: Analyzing trace with hash -435630226, now seen corresponding path program 13 times [2023-09-01 02:58:42,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:42,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146172144] [2023-09-01 02:58:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:42,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:42,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:42,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146172144] [2023-09-01 02:58:42,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146172144] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:42,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427626884] [2023-09-01 02:58:42,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 02:58:42,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:42,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:42,334 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) [2023-09-01 02:58:42,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 02:58:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:42,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:58:42,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:42,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:42,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427626884] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:42,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:42,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-09-01 02:58:42,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063593304] [2023-09-01 02:58:42,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:42,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 02:58:42,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:42,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 02:58:42,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-09-01 02:58:42,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:42,824 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) [2023-09-01 02:58:42,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:42,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:42,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:45,730 INFO L130 PetriNetUnfolder]: 2387/4835 cut-off events. [2023-09-01 02:58:45,730 INFO L131 PetriNetUnfolder]: For 463727/463727 co-relation queries the response was YES. [2023-09-01 02:58:45,769 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. [2023-09-01 02:58:45,791 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 420 selfloop transitions, 517 changer transitions 5/942 dead transitions. [2023-09-01 02:58:45,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 942 transitions, 21563 flow [2023-09-01 02:58:45,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 02:58:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 02:58:45,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3520 transitions. [2023-09-01 02:58:45,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419889502762431 [2023-09-01 02:58:45,796 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3520 transitions. [2023-09-01 02:58:45,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3520 transitions. [2023-09-01 02:58:45,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:45,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3520 transitions. [2023-09-01 02:58:45,803 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) [2023-09-01 02:58:45,810 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) [2023-09-01 02:58:45,811 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) [2023-09-01 02:58:45,812 INFO L175 Difference]: Start difference. First operand has 294 places, 752 transitions, 17161 flow. Second operand 44 states and 3520 transitions. [2023-09-01 02:58:45,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 942 transitions, 21563 flow [2023-09-01 02:58:47,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 942 transitions, 19575 flow, removed 882 selfloop flow, removed 16 redundant places. [2023-09-01 02:58:47,852 INFO L231 Difference]: Finished difference. Result has 329 places, 753 transitions, 16733 flow [2023-09-01 02:58:47,852 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} [2023-09-01 02:58:47,853 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 300 predicate places. [2023-09-01 02:58:47,853 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 753 transitions, 16733 flow [2023-09-01 02:58:47,853 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) [2023-09-01 02:58:47,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:47,853 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:47,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:48,058 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 [2023-09-01 02:58:48,059 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)] === [2023-09-01 02:58:48,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:48,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1265018710, now seen corresponding path program 14 times [2023-09-01 02:58:48,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:48,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166340776] [2023-09-01 02:58:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:48,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:48,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:48,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166340776] [2023-09-01 02:58:48,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166340776] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:48,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040449016] [2023-09-01 02:58:48,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:58:48,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:48,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:48,220 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) [2023-09-01 02:58:48,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 02:58:48,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:58:48,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:48,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:58:48,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:48,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:48,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040449016] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:48,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:48,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-09-01 02:58:48,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23094918] [2023-09-01 02:58:48,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:48,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 02:58:48,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:48,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 02:58:48,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-09-01 02:58:48,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:48,586 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) [2023-09-01 02:58:48,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:48,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:48,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:53,730 INFO L130 PetriNetUnfolder]: 2553/5177 cut-off events. [2023-09-01 02:58:53,730 INFO L131 PetriNetUnfolder]: For 528645/528645 co-relation queries the response was YES. [2023-09-01 02:58:53,775 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. [2023-09-01 02:58:53,799 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 621 selfloop transitions, 341 changer transitions 22/984 dead transitions. [2023-09-01 02:58:53,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 984 transitions, 22093 flow [2023-09-01 02:58:53,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 02:58:53,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 02:58:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2803 transitions. [2023-09-01 02:58:53,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4424625098658248 [2023-09-01 02:58:53,804 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2803 transitions. [2023-09-01 02:58:53,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2803 transitions. [2023-09-01 02:58:53,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:53,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2803 transitions. [2023-09-01 02:58:53,810 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) [2023-09-01 02:58:53,815 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) [2023-09-01 02:58:53,815 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) [2023-09-01 02:58:53,816 INFO L175 Difference]: Start difference. First operand has 329 places, 753 transitions, 16733 flow. Second operand 35 states and 2803 transitions. [2023-09-01 02:58:53,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 984 transitions, 22093 flow [2023-09-01 02:58:55,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 984 transitions, 21285 flow, removed 149 selfloop flow, removed 32 redundant places. [2023-09-01 02:58:55,919 INFO L231 Difference]: Finished difference. Result has 339 places, 803 transitions, 18416 flow [2023-09-01 02:58:55,919 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} [2023-09-01 02:58:55,920 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 310 predicate places. [2023-09-01 02:58:55,920 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 803 transitions, 18416 flow [2023-09-01 02:58:55,920 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) [2023-09-01 02:58:55,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:55,920 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:58:55,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:56,120 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 [2023-09-01 02:58:56,121 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)] === [2023-09-01 02:58:56,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:56,121 INFO L85 PathProgramCache]: Analyzing trace with hash -820146284, now seen corresponding path program 15 times [2023-09-01 02:58:56,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:56,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676719021] [2023-09-01 02:58:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:56,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:56,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:56,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676719021] [2023-09-01 02:58:56,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676719021] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:56,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627940571] [2023-09-01 02:58:56,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:58:56,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:56,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:56,277 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) [2023-09-01 02:58:56,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 02:58:56,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 02:58:56,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:56,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:58:56,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:56,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:56,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627940571] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:56,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:56,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 02:58:56,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810032067] [2023-09-01 02:58:56,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:56,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:58:56,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:56,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:58:56,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:58:56,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:58:56,651 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) [2023-09-01 02:58:56,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:56,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:58:56,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:59,946 INFO L130 PetriNetUnfolder]: 3040/6136 cut-off events. [2023-09-01 02:58:59,946 INFO L131 PetriNetUnfolder]: For 693451/693451 co-relation queries the response was YES. [2023-09-01 02:59:00,000 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. [2023-09-01 02:59:00,030 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 819 selfloop transitions, 315 changer transitions 1/1135 dead transitions. [2023-09-01 02:59:00,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1135 transitions, 26471 flow [2023-09-01 02:59:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 02:59:00,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 02:59:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3117 transitions. [2023-09-01 02:59:00,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4415639609009775 [2023-09-01 02:59:00,036 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3117 transitions. [2023-09-01 02:59:00,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3117 transitions. [2023-09-01 02:59:00,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:59:00,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3117 transitions. [2023-09-01 02:59:00,042 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) [2023-09-01 02:59:00,047 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) [2023-09-01 02:59:00,048 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) [2023-09-01 02:59:00,049 INFO L175 Difference]: Start difference. First operand has 339 places, 803 transitions, 18416 flow. Second operand 39 states and 3117 transitions. [2023-09-01 02:59:00,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1135 transitions, 26471 flow [2023-09-01 02:59:02,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1135 transitions, 26012 flow, removed 171 selfloop flow, removed 14 redundant places. [2023-09-01 02:59:02,974 INFO L231 Difference]: Finished difference. Result has 379 places, 933 transitions, 22671 flow [2023-09-01 02:59:02,975 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} [2023-09-01 02:59:02,976 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 350 predicate places. [2023-09-01 02:59:02,976 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 933 transitions, 22671 flow [2023-09-01 02:59:02,976 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) [2023-09-01 02:59:02,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:59:02,976 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:59:02,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-09-01 02:59:03,176 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 [2023-09-01 02:59:03,177 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)] === [2023-09-01 02:59:03,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:59:03,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1083346284, now seen corresponding path program 16 times [2023-09-01 02:59:03,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:59:03,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242547810] [2023-09-01 02:59:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:59:03,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:59:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:59:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:03,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:59:03,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242547810] [2023-09-01 02:59:03,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242547810] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:59:03,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142340493] [2023-09-01 02:59:03,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:59:03,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:59:03,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:59:03,313 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) [2023-09-01 02:59:03,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 02:59:03,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:59:03,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:59:03,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:59:03,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:59:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:03,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:59:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:03,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142340493] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:59:03,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:59:03,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-09-01 02:59:03,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30961908] [2023-09-01 02:59:03,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:59:03,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 02:59:03,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:59:03,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 02:59:03,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-09-01 02:59:03,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:59:03,667 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) [2023-09-01 02:59:03,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:59:03,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:59:03,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:59:08,133 INFO L130 PetriNetUnfolder]: 3423/6921 cut-off events. [2023-09-01 02:59:08,133 INFO L131 PetriNetUnfolder]: For 937279/937279 co-relation queries the response was YES. [2023-09-01 02:59:08,193 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. [2023-09-01 02:59:08,222 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 756 selfloop transitions, 430 changer transitions 29/1215 dead transitions. [2023-09-01 02:59:08,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 1215 transitions, 30083 flow [2023-09-01 02:59:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 02:59:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 02:59:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3254 transitions. [2023-09-01 02:59:08,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384853793289314 [2023-09-01 02:59:08,225 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3254 transitions. [2023-09-01 02:59:08,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3254 transitions. [2023-09-01 02:59:08,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:59:08,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3254 transitions. [2023-09-01 02:59:08,230 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) [2023-09-01 02:59:08,235 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) [2023-09-01 02:59:08,235 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) [2023-09-01 02:59:08,235 INFO L175 Difference]: Start difference. First operand has 379 places, 933 transitions, 22671 flow. Second operand 41 states and 3254 transitions. [2023-09-01 02:59:08,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 1215 transitions, 30083 flow [2023-09-01 02:59:12,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1215 transitions, 29039 flow, removed 322 selfloop flow, removed 14 redundant places. [2023-09-01 02:59:12,432 INFO L231 Difference]: Finished difference. Result has 418 places, 1026 transitions, 25755 flow [2023-09-01 02:59:12,433 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} [2023-09-01 02:59:12,433 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 389 predicate places. [2023-09-01 02:59:12,433 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 1026 transitions, 25755 flow [2023-09-01 02:59:12,434 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) [2023-09-01 02:59:12,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:59:12,434 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:59:12,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 02:59:12,634 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 [2023-09-01 02:59:12,634 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)] === [2023-09-01 02:59:12,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:59:12,635 INFO L85 PathProgramCache]: Analyzing trace with hash 240469914, now seen corresponding path program 17 times [2023-09-01 02:59:12,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:59:12,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586978195] [2023-09-01 02:59:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:59:12,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:59:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:59:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:12,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:59:12,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586978195] [2023-09-01 02:59:12,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586978195] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:59:12,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009551480] [2023-09-01 02:59:12,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:59:12,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:59:12,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:59:12,776 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) [2023-09-01 02:59:12,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 02:59:12,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 02:59:12,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:59:12,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:59:12,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:59:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:12,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:59:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:13,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009551480] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:59:13,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:59:13,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-09-01 02:59:13,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125793364] [2023-09-01 02:59:13,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:59:13,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 02:59:13,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:59:13,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 02:59:13,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-09-01 02:59:13,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:59:13,235 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) [2023-09-01 02:59:13,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:59:13,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:59:13,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:59:18,164 INFO L130 PetriNetUnfolder]: 3683/7454 cut-off events. [2023-09-01 02:59:18,165 INFO L131 PetriNetUnfolder]: For 1096253/1096253 co-relation queries the response was YES. [2023-09-01 02:59:18,240 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. [2023-09-01 02:59:18,273 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 973 selfloop transitions, 252 changer transitions 24/1249 dead transitions. [2023-09-01 02:59:18,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1249 transitions, 32361 flow [2023-09-01 02:59:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 02:59:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 02:59:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2164 transitions. [2023-09-01 02:59:18,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4428074483323102 [2023-09-01 02:59:18,276 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2164 transitions. [2023-09-01 02:59:18,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2164 transitions. [2023-09-01 02:59:18,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:59:18,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2164 transitions. [2023-09-01 02:59:18,279 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) [2023-09-01 02:59:18,282 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) [2023-09-01 02:59:18,283 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) [2023-09-01 02:59:18,283 INFO L175 Difference]: Start difference. First operand has 418 places, 1026 transitions, 25755 flow. Second operand 27 states and 2164 transitions. [2023-09-01 02:59:18,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1249 transitions, 32361 flow [2023-09-01 02:59:24,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 1249 transitions, 31838 flow, removed 206 selfloop flow, removed 20 redundant places. [2023-09-01 02:59:24,158 INFO L231 Difference]: Finished difference. Result has 432 places, 1090 transitions, 28054 flow [2023-09-01 02:59:24,159 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} [2023-09-01 02:59:24,160 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 403 predicate places. [2023-09-01 02:59:24,160 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 1090 transitions, 28054 flow [2023-09-01 02:59:24,160 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) [2023-09-01 02:59:24,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:59:24,160 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:59:24,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 02:59:24,365 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 [2023-09-01 02:59:24,365 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)] === [2023-09-01 02:59:24,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:59:24,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1616663070, now seen corresponding path program 18 times [2023-09-01 02:59:24,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:59:24,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337999563] [2023-09-01 02:59:24,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:59:24,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:59:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:59:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:24,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:59:24,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337999563] [2023-09-01 02:59:24,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337999563] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:59:24,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2300850] [2023-09-01 02:59:24,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 02:59:24,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:59:24,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:59:24,501 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) [2023-09-01 02:59:24,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 02:59:24,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 02:59:24,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:59:24,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:59:24,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:59:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:24,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:59:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:24,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2300850] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:59:24,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:59:24,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 02:59:24,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881852360] [2023-09-01 02:59:24,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:59:24,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:59:24,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:59:24,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:59:24,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:59:24,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:59:24,886 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) [2023-09-01 02:59:24,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:59:24,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:59:24,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:59:29,475 INFO L130 PetriNetUnfolder]: 3970/7965 cut-off events. [2023-09-01 02:59:29,475 INFO L131 PetriNetUnfolder]: For 1197792/1197792 co-relation queries the response was YES. [2023-09-01 02:59:29,568 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. [2023-09-01 02:59:29,614 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 1104 selfloop transitions, 271 changer transitions 4/1379 dead transitions. [2023-09-01 02:59:29,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 1379 transitions, 36469 flow [2023-09-01 02:59:29,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 02:59:29,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 02:59:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2876 transitions. [2023-09-01 02:59:29,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44137507673419274 [2023-09-01 02:59:29,617 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2876 transitions. [2023-09-01 02:59:29,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2876 transitions. [2023-09-01 02:59:29,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:59:29,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2876 transitions. [2023-09-01 02:59:29,623 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) [2023-09-01 02:59:29,629 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) [2023-09-01 02:59:29,629 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) [2023-09-01 02:59:29,630 INFO L175 Difference]: Start difference. First operand has 432 places, 1090 transitions, 28054 flow. Second operand 36 states and 2876 transitions. [2023-09-01 02:59:29,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 1379 transitions, 36469 flow [2023-09-01 02:59:36,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 1379 transitions, 35863 flow, removed 230 selfloop flow, removed 11 redundant places. [2023-09-01 02:59:36,063 INFO L231 Difference]: Finished difference. Result has 470 places, 1194 transitions, 31713 flow [2023-09-01 02:59:36,065 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} [2023-09-01 02:59:36,066 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 441 predicate places. [2023-09-01 02:59:36,066 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 1194 transitions, 31713 flow [2023-09-01 02:59:36,066 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) [2023-09-01 02:59:36,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:59:36,066 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:59:36,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 02:59:36,272 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 [2023-09-01 02:59:36,272 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)] === [2023-09-01 02:59:36,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:59:36,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2023571842, now seen corresponding path program 19 times [2023-09-01 02:59:36,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:59:36,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327122708] [2023-09-01 02:59:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:59:36,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:59:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:59:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:36,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:59:36,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327122708] [2023-09-01 02:59:36,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327122708] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:59:36,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562204845] [2023-09-01 02:59:36,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 02:59:36,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:59:36,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:59:36,505 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) [2023-09-01 02:59:36,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 02:59:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:59:36,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:59:36,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:59:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:36,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:59:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:36,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562204845] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:59:36,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:59:36,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-09-01 02:59:36,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659644411] [2023-09-01 02:59:36,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:59:36,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 02:59:36,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:59:36,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 02:59:36,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-09-01 02:59:36,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:59:36,951 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) [2023-09-01 02:59:36,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:59:36,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:59:36,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:59:42,606 INFO L130 PetriNetUnfolder]: 4415/9006 cut-off events. [2023-09-01 02:59:42,606 INFO L131 PetriNetUnfolder]: For 1625478/1625478 co-relation queries the response was YES. [2023-09-01 02:59:42,706 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. [2023-09-01 02:59:42,749 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 686 selfloop transitions, 832 changer transitions 16/1534 dead transitions. [2023-09-01 02:59:42,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 1534 transitions, 42054 flow [2023-09-01 02:59:42,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 02:59:42,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 02:59:42,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2753 transitions. [2023-09-01 02:59:42,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44735131621709456 [2023-09-01 02:59:42,752 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2753 transitions. [2023-09-01 02:59:42,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2753 transitions. [2023-09-01 02:59:42,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:59:42,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2753 transitions. [2023-09-01 02:59:42,755 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) [2023-09-01 02:59:42,760 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) [2023-09-01 02:59:42,761 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) [2023-09-01 02:59:42,761 INFO L175 Difference]: Start difference. First operand has 470 places, 1194 transitions, 31713 flow. Second operand 34 states and 2753 transitions. [2023-09-01 02:59:42,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 1534 transitions, 42054 flow [2023-09-01 02:59:51,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 1534 transitions, 41032 flow, removed 427 selfloop flow, removed 16 redundant places. [2023-09-01 02:59:51,262 INFO L231 Difference]: Finished difference. Result has 502 places, 1321 transitions, 37369 flow [2023-09-01 02:59:51,263 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} [2023-09-01 02:59:51,264 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 473 predicate places. [2023-09-01 02:59:51,264 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 1321 transitions, 37369 flow [2023-09-01 02:59:51,265 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) [2023-09-01 02:59:51,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:59:51,265 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:59:51,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 02:59:51,470 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 [2023-09-01 02:59:51,471 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)] === [2023-09-01 02:59:51,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:59:51,471 INFO L85 PathProgramCache]: Analyzing trace with hash 449480860, now seen corresponding path program 20 times [2023-09-01 02:59:51,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:59:51,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022249340] [2023-09-01 02:59:51,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:59:51,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:59:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:59:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:51,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:59:51,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022249340] [2023-09-01 02:59:51,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022249340] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:59:51,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610556690] [2023-09-01 02:59:51,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:59:51,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:59:51,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:59:51,629 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) [2023-09-01 02:59:51,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 02:59:51,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:59:51,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:59:51,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:59:51,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:59:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:51,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:59:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:59:51,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610556690] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:59:51,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:59:51,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 02:59:51,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839823038] [2023-09-01 02:59:51,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:59:51,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:59:51,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:59:51,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:59:51,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:59:51,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 02:59:51,968 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) [2023-09-01 02:59:51,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:59:51,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 02:59:51,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:59:57,479 INFO L130 PetriNetUnfolder]: 4652/9433 cut-off events. [2023-09-01 02:59:57,479 INFO L131 PetriNetUnfolder]: For 1949611/1949611 co-relation queries the response was YES. [2023-09-01 02:59:57,626 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. [2023-09-01 02:59:57,678 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 1329 selfloop transitions, 206 changer transitions 4/1539 dead transitions. [2023-09-01 02:59:57,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 1539 transitions, 44419 flow [2023-09-01 02:59:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 02:59:57,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 02:59:57,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2871 transitions. [2023-09-01 02:59:57,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44060773480662985 [2023-09-01 02:59:57,681 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2871 transitions. [2023-09-01 02:59:57,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2871 transitions. [2023-09-01 02:59:57,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:59:57,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2871 transitions. [2023-09-01 02:59:57,684 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) [2023-09-01 02:59:57,689 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) [2023-09-01 02:59:57,690 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) [2023-09-01 02:59:57,690 INFO L175 Difference]: Start difference. First operand has 502 places, 1321 transitions, 37369 flow. Second operand 36 states and 2871 transitions. [2023-09-01 02:59:57,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 1539 transitions, 44419 flow [2023-09-01 03:00:10,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 1539 transitions, 43006 flow, removed 628 selfloop flow, removed 11 redundant places. [2023-09-01 03:00:10,457 INFO L231 Difference]: Finished difference. Result has 541 places, 1398 transitions, 39141 flow [2023-09-01 03:00:10,458 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} [2023-09-01 03:00:10,459 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 512 predicate places. [2023-09-01 03:00:10,459 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 1398 transitions, 39141 flow [2023-09-01 03:00:10,459 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) [2023-09-01 03:00:10,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:00:10,459 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:00:10,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 03:00:10,661 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 [2023-09-01 03:00:10,661 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)] === [2023-09-01 03:00:10,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:00:10,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1191804774, now seen corresponding path program 21 times [2023-09-01 03:00:10,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:00:10,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012301078] [2023-09-01 03:00:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:00:10,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:00:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:00:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:00:10,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:00:10,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012301078] [2023-09-01 03:00:10,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012301078] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:00:10,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175342464] [2023-09-01 03:00:10,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:00:10,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:00:10,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:00:10,853 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) [2023-09-01 03:00:10,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 03:00:10,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 03:00:10,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:00:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:00:10,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:00:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:00:10,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:00:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:00:11,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175342464] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:00:11,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:00:11,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-09-01 03:00:11,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461510844] [2023-09-01 03:00:11,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:00:11,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 03:00:11,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:00:11,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 03:00:11,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-09-01 03:00:11,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 03:00:11,275 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) [2023-09-01 03:00:11,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:00:11,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 03:00:11,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:00:19,305 INFO L130 PetriNetUnfolder]: 4638/9381 cut-off events. [2023-09-01 03:00:19,305 INFO L131 PetriNetUnfolder]: For 2004047/2004047 co-relation queries the response was YES. [2023-09-01 03:00:19,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138750 conditions, 9381 events. 4638/9381 cut-off events. For 2004047/2004047 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 83857 event pairs, 358 based on Foata normal form. 22/9403 useless extension candidates. Maximal degree in co-relation 138570. Up to 2788 conditions per place. [2023-09-01 03:00:19,634 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 504 selfloop transitions, 1086 changer transitions 23/1613 dead transitions. [2023-09-01 03:00:19,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 1613 transitions, 47154 flow [2023-09-01 03:00:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-09-01 03:00:19,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-09-01 03:00:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4168 transitions. [2023-09-01 03:00:19,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344834775357031 [2023-09-01 03:00:19,638 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4168 transitions. [2023-09-01 03:00:19,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4168 transitions. [2023-09-01 03:00:19,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:00:19,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4168 transitions. [2023-09-01 03:00:19,644 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) [2023-09-01 03:00:19,651 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) [2023-09-01 03:00:19,652 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) [2023-09-01 03:00:19,653 INFO L175 Difference]: Start difference. First operand has 541 places, 1398 transitions, 39141 flow. Second operand 53 states and 4168 transitions. [2023-09-01 03:00:19,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 1613 transitions, 47154 flow [2023-09-01 03:00:33,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 1613 transitions, 45894 flow, removed 575 selfloop flow, removed 13 redundant places. [2023-09-01 03:00:33,296 INFO L231 Difference]: Finished difference. Result has 587 places, 1449 transitions, 42350 flow [2023-09-01 03:00:33,297 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=42350, PETRI_PLACES=587, PETRI_TRANSITIONS=1449} [2023-09-01 03:00:33,297 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 558 predicate places. [2023-09-01 03:00:33,297 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 1449 transitions, 42350 flow [2023-09-01 03:00:33,298 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) [2023-09-01 03:00:33,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:00:33,298 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:00:33,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 03:00:33,498 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 [2023-09-01 03:00:33,498 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)] === [2023-09-01 03:00:33,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:00:33,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1221888988, now seen corresponding path program 22 times [2023-09-01 03:00:33,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:00:33,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35843548] [2023-09-01 03:00:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:00:33,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:00:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:00:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:00:33,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:00:33,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35843548] [2023-09-01 03:00:33,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35843548] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:00:33,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019872371] [2023-09-01 03:00:33,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:00:33,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:00:33,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:00:33,630 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) [2023-09-01 03:00:33,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 03:00:33,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:00:33,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:00:33,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:00:33,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:00:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:00:33,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:00:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:00:33,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019872371] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:00:33,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:00:33,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-09-01 03:00:33,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258498131] [2023-09-01 03:00:33,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:00:33,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 03:00:33,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:00:33,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 03:00:33,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-09-01 03:00:33,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 03:00:33,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 1449 transitions, 42350 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) [2023-09-01 03:00:33,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:00:33,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 03:00:33,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:00:37,032 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 [] [2023-09-01 03:00:42,952 INFO L130 PetriNetUnfolder]: 4828/9711 cut-off events. [2023-09-01 03:00:42,952 INFO L131 PetriNetUnfolder]: For 2215888/2215888 co-relation queries the response was YES. [2023-09-01 03:00:43,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145749 conditions, 9711 events. 4828/9711 cut-off events. For 2215888/2215888 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 86625 event pairs, 1627 based on Foata normal form. 70/9781 useless extension candidates. Maximal degree in co-relation 145562. Up to 7457 conditions per place. [2023-09-01 03:00:43,136 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 1164 selfloop transitions, 454 changer transitions 23/1641 dead transitions. [2023-09-01 03:00:43,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1641 transitions, 49706 flow [2023-09-01 03:00:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 03:00:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 03:00:43,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2313 transitions. [2023-09-01 03:00:43,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44065536292627167 [2023-09-01 03:00:43,138 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2313 transitions. [2023-09-01 03:00:43,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2313 transitions. [2023-09-01 03:00:43,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:00:43,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2313 transitions. [2023-09-01 03:00:43,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 79.75862068965517) internal successors, (2313), 29 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:00:43,144 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) [2023-09-01 03:00:43,145 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) [2023-09-01 03:00:43,145 INFO L175 Difference]: Start difference. First operand has 587 places, 1449 transitions, 42350 flow. Second operand 29 states and 2313 transitions. [2023-09-01 03:00:43,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1641 transitions, 49706 flow [2023-09-01 03:00:58,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 1641 transitions, 47967 flow, removed 642 selfloop flow, removed 19 redundant places. [2023-09-01 03:00:58,085 INFO L231 Difference]: Finished difference. Result has 603 places, 1516 transitions, 44666 flow [2023-09-01 03:00:58,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=40954, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1014, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=44666, PETRI_PLACES=603, PETRI_TRANSITIONS=1516} [2023-09-01 03:00:58,086 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 574 predicate places. [2023-09-01 03:00:58,086 INFO L495 AbstractCegarLoop]: Abstraction has has 603 places, 1516 transitions, 44666 flow [2023-09-01 03:00:58,087 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) [2023-09-01 03:00:58,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:00:58,087 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:00:58,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 03:00:58,287 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 [2023-09-01 03:00:58,288 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)] === [2023-09-01 03:00:58,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:00:58,288 INFO L85 PathProgramCache]: Analyzing trace with hash 961747000, now seen corresponding path program 23 times [2023-09-01 03:00:58,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:00:58,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539241348] [2023-09-01 03:00:58,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:00:58,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:00:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:00:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:00:58,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:00:58,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539241348] [2023-09-01 03:00:58,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539241348] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:00:58,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386476812] [2023-09-01 03:00:58,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:00:58,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:00:58,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:00:58,429 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) [2023-09-01 03:00:58,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 03:00:58,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 03:00:58,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:00:58,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 03:00:58,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:00:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:00:58,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:00:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:00:58,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386476812] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:00:58,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:00:58,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2023-09-01 03:00:58,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469532056] [2023-09-01 03:00:58,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:00:58,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:00:58,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:00:58,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:00:58,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:00:58,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-09-01 03:00:58,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 1516 transitions, 44666 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) [2023-09-01 03:00:58,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:00:58,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-09-01 03:00:58,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:07,020 INFO L130 PetriNetUnfolder]: 6070/12277 cut-off events. [2023-09-01 03:01:07,020 INFO L131 PetriNetUnfolder]: For 2967057/2967067 co-relation queries the response was YES. [2023-09-01 03:01:07,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191605 conditions, 12277 events. 6070/12277 cut-off events. For 2967057/2967067 co-relation queries the response was YES. Maximal size of possible extension queue 1094. Compared 113934 event pairs, 747 based on Foata normal form. 234/12507 useless extension candidates. Maximal degree in co-relation 191409. Up to 6071 conditions per place. [2023-09-01 03:01:07,316 INFO L137 encePairwiseOnDemand]: 177/181 looper letters, 1135 selfloop transitions, 733 changer transitions 159/2040 dead transitions. [2023-09-01 03:01:07,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 2040 transitions, 64283 flow [2023-09-01 03:01:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:01:07,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:01:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 715 transitions. [2023-09-01 03:01:07,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937845303867403 [2023-09-01 03:01:07,317 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 715 transitions. [2023-09-01 03:01:07,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 715 transitions. [2023-09-01 03:01:07,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:07,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 715 transitions. [2023-09-01 03:01:07,318 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) [2023-09-01 03:01:07,319 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) [2023-09-01 03:01:07,319 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) [2023-09-01 03:01:07,319 INFO L175 Difference]: Start difference. First operand has 603 places, 1516 transitions, 44666 flow. Second operand 8 states and 715 transitions. [2023-09-01 03:01:07,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 2040 transitions, 64283 flow [2023-09-01 03:01:30,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 2040 transitions, 63829 flow, removed 122 selfloop flow, removed 22 redundant places. [2023-09-01 03:01:30,970 INFO L231 Difference]: Finished difference. Result has 591 places, 1736 transitions, 55511 flow [2023-09-01 03:01:30,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=44088, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=422, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=802, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=55511, PETRI_PLACES=591, PETRI_TRANSITIONS=1736} [2023-09-01 03:01:30,973 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 562 predicate places. [2023-09-01 03:01:30,973 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 1736 transitions, 55511 flow [2023-09-01 03:01:30,973 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) [2023-09-01 03:01:30,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:01:30,974 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:01:30,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 03:01:31,179 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 [2023-09-01 03:01:31,180 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)] === [2023-09-01 03:01:31,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:01:31,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1554877759, now seen corresponding path program 24 times [2023-09-01 03:01:31,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:01:31,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403502149] [2023-09-01 03:01:31,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:01:31,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:01:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:01:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:31,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:01:31,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403502149] [2023-09-01 03:01:31,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403502149] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:01:31,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084794073] [2023-09-01 03:01:31,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:01:31,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:01:31,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:01:31,362 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) [2023-09-01 03:01:31,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 03:01:31,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 03:01:31,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:01:31,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:01:31,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:01:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:31,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:01:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:01:31,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084794073] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:01:31,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:01:31,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-09-01 03:01:31,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412390840] [2023-09-01 03:01:31,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:01:31,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 03:01:31,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:01:31,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 03:01:31,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-09-01 03:01:31,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 03:01:31,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 1736 transitions, 55511 flow. Second operand has 19 states, 19 states have (on average 75.78947368421052) internal successors, (1440), 19 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:01:31,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:01:31,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 03:01:31,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:01:48,076 INFO L130 PetriNetUnfolder]: 10069/20497 cut-off events. [2023-09-01 03:01:48,077 INFO L131 PetriNetUnfolder]: For 5101647/5101647 co-relation queries the response was YES. [2023-09-01 03:01:48,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322125 conditions, 20497 events. 10069/20497 cut-off events. For 5101647/5101647 co-relation queries the response was YES. Maximal size of possible extension queue 1635. Compared 204814 event pairs, 1561 based on Foata normal form. 190/20687 useless extension candidates. Maximal degree in co-relation 321928. Up to 7486 conditions per place. [2023-09-01 03:01:49,138 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 2668 selfloop transitions, 665 changer transitions 3/3336 dead transitions. [2023-09-01 03:01:49,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 3336 transitions, 109753 flow [2023-09-01 03:01:49,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 03:01:49,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 03:01:49,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2103 transitions. [2023-09-01 03:01:49,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4468763280917977 [2023-09-01 03:01:49,142 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2103 transitions. [2023-09-01 03:01:49,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2103 transitions. [2023-09-01 03:01:49,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:01:49,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2103 transitions. [2023-09-01 03:01:49,145 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) [2023-09-01 03:01:49,148 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) [2023-09-01 03:01:49,148 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) [2023-09-01 03:01:49,149 INFO L175 Difference]: Start difference. First operand has 591 places, 1736 transitions, 55511 flow. Second operand 26 states and 2103 transitions. [2023-09-01 03:01:49,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 3336 transitions, 109753 flow [2023-09-01 03:02:39,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 3336 transitions, 107898 flow, removed 834 selfloop flow, removed 12 redundant places. [2023-09-01 03:02:39,428 INFO L231 Difference]: Finished difference. Result has 597 places, 2139 transitions, 68638 flow [2023-09-01 03:02:39,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=54528, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=68638, PETRI_PLACES=597, PETRI_TRANSITIONS=2139} [2023-09-01 03:02:39,431 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 568 predicate places. [2023-09-01 03:02:39,431 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 2139 transitions, 68638 flow [2023-09-01 03:02:39,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 75.78947368421052) internal successors, (1440), 19 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:02:39,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:02:39,432 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:02:39,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 03:02:39,637 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 [2023-09-01 03:02:39,638 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)] === [2023-09-01 03:02:39,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:02:39,638 INFO L85 PathProgramCache]: Analyzing trace with hash 153141877, now seen corresponding path program 25 times [2023-09-01 03:02:39,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:02:39,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276231943] [2023-09-01 03:02:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:02:39,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:02:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:02:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:02:39,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:02:39,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276231943] [2023-09-01 03:02:39,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276231943] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:02:39,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75756129] [2023-09-01 03:02:39,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 03:02:39,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:02:39,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:02:39,821 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) [2023-09-01 03:02:39,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 03:02:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:02:39,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:02:39,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:02:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:02:39,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:02:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:02:40,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75756129] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:02:40,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:02:40,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-09-01 03:02:40,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776880201] [2023-09-01 03:02:40,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:02:40,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 03:02:40,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:02:40,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 03:02:40,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-09-01 03:02:40,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 03:02:40,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 2139 transitions, 68638 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) [2023-09-01 03:02:40,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:02:40,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 03:02:40,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:03:02,033 INFO L130 PetriNetUnfolder]: 10552/21408 cut-off events. [2023-09-01 03:03:02,033 INFO L131 PetriNetUnfolder]: For 4906645/4906645 co-relation queries the response was YES. [2023-09-01 03:03:03,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333262 conditions, 21408 events. 10552/21408 cut-off events. For 4906645/4906645 co-relation queries the response was YES. Maximal size of possible extension queue 1730. Compared 215071 event pairs, 1615 based on Foata normal form. 224/21632 useless extension candidates. Maximal degree in co-relation 333064. Up to 7674 conditions per place. [2023-09-01 03:03:03,198 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 2813 selfloop transitions, 829 changer transitions 3/3645 dead transitions. [2023-09-01 03:03:03,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 3645 transitions, 119359 flow [2023-09-01 03:03:03,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-09-01 03:03:03,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-09-01 03:03:03,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4652 transitions. [2023-09-01 03:03:03,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44313202514764716 [2023-09-01 03:03:03,204 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4652 transitions. [2023-09-01 03:03:03,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4652 transitions. [2023-09-01 03:03:03,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:03:03,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4652 transitions. [2023-09-01 03:03:03,210 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) [2023-09-01 03:03:03,218 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) [2023-09-01 03:03:03,220 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) [2023-09-01 03:03:03,220 INFO L175 Difference]: Start difference. First operand has 597 places, 2139 transitions, 68638 flow. Second operand 58 states and 4652 transitions. [2023-09-01 03:03:03,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 3645 transitions, 119359 flow [2023-09-01 03:04:00,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 3645 transitions, 116634 flow, removed 1185 selfloop flow, removed 13 redundant places. [2023-09-01 03:04:00,476 INFO L231 Difference]: Finished difference. Result has 653 places, 2364 transitions, 77014 flow [2023-09-01 03:04:00,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=66670, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=650, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=77014, PETRI_PLACES=653, PETRI_TRANSITIONS=2364} [2023-09-01 03:04:00,477 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 624 predicate places. [2023-09-01 03:04:00,478 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 2364 transitions, 77014 flow [2023-09-01 03:04:00,478 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) [2023-09-01 03:04:00,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:04:00,478 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:04:00,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 03:04:00,678 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 [2023-09-01 03:04:00,679 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)] === [2023-09-01 03:04:00,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:04:00,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1761027897, now seen corresponding path program 26 times [2023-09-01 03:04:00,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:04:00,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836362895] [2023-09-01 03:04:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:04:00,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:04:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:04:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:04:00,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:04:00,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836362895] [2023-09-01 03:04:00,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836362895] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:04:00,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714894685] [2023-09-01 03:04:00,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:04:00,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:04:00,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:04:00,865 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) [2023-09-01 03:04:00,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 03:04:00,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:04:00,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:04:00,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:04:00,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:04:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:04:01,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:04:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:04:01,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714894685] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:04:01,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:04:01,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-09-01 03:04:01,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34488845] [2023-09-01 03:04:01,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:04:01,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 03:04:01,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:04:01,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 03:04:01,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-09-01 03:04:01,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 03:04:01,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 2364 transitions, 77014 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) [2023-09-01 03:04:01,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:04:01,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 03:04:01,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:04:21,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 03:04:24,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 03:05:34,470 INFO L130 PetriNetUnfolder]: 12793/26471 cut-off events. [2023-09-01 03:05:34,470 INFO L131 PetriNetUnfolder]: For 8117617/8117617 co-relation queries the response was YES. [2023-09-01 03:05:35,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457818 conditions, 26471 events. 12793/26471 cut-off events. For 8117617/8117617 co-relation queries the response was YES. Maximal size of possible extension queue 2065. Compared 278276 event pairs, 406 based on Foata normal form. 92/26563 useless extension candidates. Maximal degree in co-relation 457614. Up to 6815 conditions per place. [2023-09-01 03:05:35,935 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 909 selfloop transitions, 3552 changer transitions 44/4505 dead transitions. [2023-09-01 03:05:35,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 762 places, 4505 transitions, 157185 flow [2023-09-01 03:05:35,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-09-01 03:05:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2023-09-01 03:05:35,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 8764 transitions. [2023-09-01 03:05:35,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44018081366147666 [2023-09-01 03:05:35,945 INFO L72 ComplementDD]: Start complementDD. Operand 110 states and 8764 transitions. [2023-09-01 03:05:35,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 110 states and 8764 transitions. [2023-09-01 03:05:35,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:05:35,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 110 states and 8764 transitions. [2023-09-01 03:05:35,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 111 states, 110 states have (on average 79.67272727272727) internal successors, (8764), 110 states have internal predecessors, (8764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:35,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 111 states, 111 states have (on average 181.0) internal successors, (20091), 111 states have internal predecessors, (20091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:35,976 INFO L81 ComplementDD]: Finished complementDD. Result has 111 states, 111 states have (on average 181.0) internal successors, (20091), 111 states have internal predecessors, (20091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:05:35,977 INFO L175 Difference]: Start difference. First operand has 653 places, 2364 transitions, 77014 flow. Second operand 110 states and 8764 transitions. [2023-09-01 03:05:35,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 762 places, 4505 transitions, 157185 flow [2023-09-01 03:07:16,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 746 places, 4505 transitions, 154047 flow, removed 1449 selfloop flow, removed 16 redundant places. [2023-09-01 03:07:17,124 INFO L231 Difference]: Finished difference. Result has 785 places, 3908 transitions, 140576 flow [2023-09-01 03:07:17,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=74552, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2075, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=110, PETRI_FLOW=140576, PETRI_PLACES=785, PETRI_TRANSITIONS=3908} [2023-09-01 03:07:17,127 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 756 predicate places. [2023-09-01 03:07:17,127 INFO L495 AbstractCegarLoop]: Abstraction has has 785 places, 3908 transitions, 140576 flow [2023-09-01 03:07:17,127 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) [2023-09-01 03:07:17,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:07:17,128 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:07:17,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 03:07:17,328 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 [2023-09-01 03:07:17,329 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)] === [2023-09-01 03:07:17,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:07:17,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1266059565, now seen corresponding path program 27 times [2023-09-01 03:07:17,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:07:17,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500814580] [2023-09-01 03:07:17,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:07:17,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:07:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:07:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:07:17,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:07:17,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500814580] [2023-09-01 03:07:17,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500814580] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:07:17,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538597869] [2023-09-01 03:07:17,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:07:17,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:07:17,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:07:17,547 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) [2023-09-01 03:07:17,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 03:07:17,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 03:07:17,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:07:17,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:07:17,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:07:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:07:17,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:07:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:07:17,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538597869] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:07:17,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:07:17,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-09-01 03:07:17,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684970730] [2023-09-01 03:07:17,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:07:17,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 03:07:17,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:07:17,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 03:07:17,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-09-01 03:07:18,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 03:07:18,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 785 places, 3908 transitions, 140576 flow. Second operand has 21 states, 21 states have (on average 75.66666666666667) internal successors, (1589), 21 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:07:18,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:07:18,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 03:07:18,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:08:28,640 INFO L130 PetriNetUnfolder]: 13327/27275 cut-off events. [2023-09-01 03:08:28,640 INFO L131 PetriNetUnfolder]: For 12958931/12958931 co-relation queries the response was YES. [2023-09-01 03:08:30,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514337 conditions, 27275 events. 13327/27275 cut-off events. For 12958931/12958931 co-relation queries the response was YES. Maximal size of possible extension queue 2153. Compared 284885 event pairs, 1953 based on Foata normal form. 320/27595 useless extension candidates. Maximal degree in co-relation 514094. Up to 9849 conditions per place. [2023-09-01 03:08:30,880 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 3237 selfloop transitions, 1361 changer transitions 51/4649 dead transitions. [2023-09-01 03:08:30,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 847 places, 4649 transitions, 168075 flow [2023-09-01 03:08:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-09-01 03:08:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-09-01 03:08:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5128 transitions. [2023-09-01 03:08:30,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44267955801104975 [2023-09-01 03:08:30,884 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5128 transitions. [2023-09-01 03:08:30,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5128 transitions. [2023-09-01 03:08:30,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:08:30,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5128 transitions. [2023-09-01 03:08:30,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 80.125) internal successors, (5128), 64 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:08:30,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 181.0) internal successors, (11765), 65 states have internal predecessors, (11765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:08:30,893 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 181.0) internal successors, (11765), 65 states have internal predecessors, (11765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:08:30,894 INFO L175 Difference]: Start difference. First operand has 785 places, 3908 transitions, 140576 flow. Second operand 64 states and 5128 transitions. [2023-09-01 03:08:30,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 847 places, 4649 transitions, 168075 flow [2023-09-01 03:11:49,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 821 places, 4649 transitions, 153022 flow, removed 7033 selfloop flow, removed 26 redundant places. [2023-09-01 03:11:50,033 INFO L231 Difference]: Finished difference. Result has 834 places, 4118 transitions, 137979 flow [2023-09-01 03:11:50,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=126995, PETRI_DIFFERENCE_MINUEND_PLACES=758, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=137979, PETRI_PLACES=834, PETRI_TRANSITIONS=4118} [2023-09-01 03:11:50,037 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 805 predicate places. [2023-09-01 03:11:50,037 INFO L495 AbstractCegarLoop]: Abstraction has has 834 places, 4118 transitions, 137979 flow [2023-09-01 03:11:50,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 75.66666666666667) internal successors, (1589), 21 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:50,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:11:50,038 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:11:50,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 03:11:50,243 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 [2023-09-01 03:11:50,244 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)] === [2023-09-01 03:11:50,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:11:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash -930875309, now seen corresponding path program 28 times [2023-09-01 03:11:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:11:50,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629328351] [2023-09-01 03:11:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:11:50,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:11:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:11:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:11:50,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:11:50,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629328351] [2023-09-01 03:11:50,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629328351] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:11:50,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984956897] [2023-09-01 03:11:50,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:11:50,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:11:50,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:11:50,445 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) [2023-09-01 03:11:50,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 03:11:50,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:11:50,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:11:50,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:11:50,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:11:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:11:50,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:11:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:11:50,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984956897] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:11:50,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:11:50,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-09-01 03:11:50,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951294061] [2023-09-01 03:11:50,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:11:50,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 03:11:50,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:11:50,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 03:11:50,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-09-01 03:11:51,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 181 [2023-09-01 03:11:51,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 834 places, 4118 transitions, 137979 flow. Second operand has 23 states, 23 states have (on average 75.6086956521739) internal successors, (1739), 23 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:11:51,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:11:51,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 181 [2023-09-01 03:11:51,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15