./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp2x4.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/bench-exp2x4.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 f3514ef3a93910f9ac9453b24d3813c22e07d2a41de38e0bc0d58abd31257770 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:22:48,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:22:48,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:22:48,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:22:48,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:22:48,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:22:48,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:22:48,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:22:48,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:22:48,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:22:48,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:22:48,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:22:48,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:22:48,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:22:48,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:22:48,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:22:48,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:22:48,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:22:48,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:22:48,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:22:48,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:22:48,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:22:48,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:22:48,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:22:48,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:22:48,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:22:48,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:22:48,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:22:48,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:22:48,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:22:48,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:22:48,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:22:48,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:22:48,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:22:48,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:22:48,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:22:48,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:22:48,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:22:48,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:22:48,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:22:48,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:22:48,447 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:22:48,478 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:22:48,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:22:48,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:22:48,480 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:22:48,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:22:48,481 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:22:48,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:22:48,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:22:48,482 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:22:48,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:22:48,483 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:22:48,483 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:22:48,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:22:48,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:22:48,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:22:48,484 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:22:48,484 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:22:48,484 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:22:48,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:22:48,485 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:22:48,485 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:22:48,485 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:22:48,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:22:48,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:22:48,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:22:48,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:22:48,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:22:48,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:22:48,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:22:48,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:22:48,487 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:22:48,487 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:22:48,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:22:48,488 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:22:48,488 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3514ef3a93910f9ac9453b24d3813c22e07d2a41de38e0bc0d58abd31257770 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:22:48,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:22:48,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:22:48,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:22:48,827 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:22:48,827 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:22:48,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp2x4.wvr.c [2023-08-29 22:22:49,875 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:22:50,058 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:22:50,059 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x4.wvr.c [2023-08-29 22:22:50,064 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0e486b54/1b51b9ecbff1431892f4dcac557710e4/FLAGc28cc1ab0 [2023-08-29 22:22:50,077 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0e486b54/1b51b9ecbff1431892f4dcac557710e4 [2023-08-29 22:22:50,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:22:50,079 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:22:50,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:22:50,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:22:50,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:22:50,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:22:50" (1/1) ... [2023-08-29 22:22:50,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@369e2374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:50, skipping insertion in model container [2023-08-29 22:22:50,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:22:50" (1/1) ... [2023-08-29 22:22:50,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:22:50,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:22:50,230 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/bench-exp2x4.wvr.c[2309,2322] [2023-08-29 22:22:50,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:22:50,242 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:22:50,274 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/bench-exp2x4.wvr.c[2309,2322] [2023-08-29 22:22:50,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:22:50,292 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:22:50,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:50 WrapperNode [2023-08-29 22:22:50,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:22:50,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:22:50,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:22:50,296 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:22:50,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:50" (1/1) ... [2023-08-29 22:22:50,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:50" (1/1) ... [2023-08-29 22:22:50,345 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2023-08-29 22:22:50,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:22:50,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:22:50,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:22:50,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:22:50,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:50" (1/1) ... [2023-08-29 22:22:50,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:50" (1/1) ... [2023-08-29 22:22:50,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:50" (1/1) ... [2023-08-29 22:22:50,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:50" (1/1) ... [2023-08-29 22:22:50,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:50" (1/1) ... [2023-08-29 22:22:50,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:50" (1/1) ... [2023-08-29 22:22:50,388 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:50" (1/1) ... [2023-08-29 22:22:50,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:50" (1/1) ... [2023-08-29 22:22:50,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:22:50,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:22:50,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:22:50,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:22:50,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:50" (1/1) ... [2023-08-29 22:22:50,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:22:50,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:22:50,429 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 22:22:50,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:22:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:22:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:22:50,488 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:22:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:22:50,488 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:22:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 22:22:50,488 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 22:22:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-29 22:22:50,488 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-29 22:22:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 22:22:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:22:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 22:22:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:22:50,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:22:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 22:22:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:22:50,490 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:22:50,591 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:22:50,593 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:22:50,887 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:22:50,894 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:22:50,895 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-29 22:22:50,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:22:50 BoogieIcfgContainer [2023-08-29 22:22:50,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:22:50,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:22:50,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:22:50,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:22:50,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:22:50" (1/3) ... [2023-08-29 22:22:50,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ba70e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:22:50, skipping insertion in model container [2023-08-29 22:22:50,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:50" (2/3) ... [2023-08-29 22:22:50,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ba70e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:22:50, skipping insertion in model container [2023-08-29 22:22:50,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:22:50" (3/3) ... [2023-08-29 22:22:50,903 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x4.wvr.c [2023-08-29 22:22:50,915 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:22:50,916 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-29 22:22:50,916 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:22:50,990 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 22:22:51,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 147 transitions, 326 flow [2023-08-29 22:22:51,092 INFO L130 PetriNetUnfolder]: 10/143 cut-off events. [2023-08-29 22:22:51,093 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 22:22:51,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 143 events. 10/143 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 103 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 96. Up to 2 conditions per place. [2023-08-29 22:22:51,098 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 147 transitions, 326 flow [2023-08-29 22:22:51,106 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 139 transitions, 302 flow [2023-08-29 22:22:51,109 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:22:51,126 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 139 transitions, 302 flow [2023-08-29 22:22:51,132 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 139 transitions, 302 flow [2023-08-29 22:22:51,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 139 transitions, 302 flow [2023-08-29 22:22:51,179 INFO L130 PetriNetUnfolder]: 10/139 cut-off events. [2023-08-29 22:22:51,179 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 22:22:51,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 139 events. 10/139 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 103 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 96. Up to 2 conditions per place. [2023-08-29 22:22:51,184 INFO L119 LiptonReduction]: Number of co-enabled transitions 1960 [2023-08-29 22:22:55,923 INFO L134 LiptonReduction]: Checked pairs total: 2229 [2023-08-29 22:22:55,924 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-08-29 22:22:55,935 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:22:55,940 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;@698f9806, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:22:55,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-29 22:22:55,943 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 22:22:55,943 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:22:55,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:55,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 22:22:55,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:55,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:55,948 INFO L85 PathProgramCache]: Analyzing trace with hash 531, now seen corresponding path program 1 times [2023-08-29 22:22:55,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:55,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059521518] [2023-08-29 22:22:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:55,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:56,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:56,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059521518] [2023-08-29 22:22:56,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059521518] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:56,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:56,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 22:22:56,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617054710] [2023-08-29 22:22:56,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:56,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 22:22:56,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:56,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 22:22:56,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 22:22:56,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 281 [2023-08-29 22:22:56,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 108 flow. Second operand has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:56,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:56,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 281 [2023-08-29 22:22:56,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:56,211 INFO L130 PetriNetUnfolder]: 513/692 cut-off events. [2023-08-29 22:22:56,211 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-29 22:22:56,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1435 conditions, 692 events. 513/692 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1650 event pairs, 249 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 1020. Up to 693 conditions per place. [2023-08-29 22:22:56,220 INFO L137 encePairwiseOnDemand]: 278/281 looper letters, 39 selfloop transitions, 0 changer transitions 0/39 dead transitions. [2023-08-29 22:22:56,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 180 flow [2023-08-29 22:22:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 22:22:56,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 22:22:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 306 transitions. [2023-08-29 22:22:56,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444839857651246 [2023-08-29 22:22:56,251 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 306 transitions. [2023-08-29 22:22:56,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 306 transitions. [2023-08-29 22:22:56,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:56,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 306 transitions. [2023-08-29 22:22:56,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 153.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:56,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:56,262 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:56,263 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 108 flow. Second operand 2 states and 306 transitions. [2023-08-29 22:22:56,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 180 flow [2023-08-29 22:22:56,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 164 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-29 22:22:56,268 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 86 flow [2023-08-29 22:22:56,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=86, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-08-29 22:22:56,273 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -10 predicate places. [2023-08-29 22:22:56,273 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 86 flow [2023-08-29 22:22:56,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:56,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:56,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:22:56,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 22:22:56,274 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:56,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:56,275 INFO L85 PathProgramCache]: Analyzing trace with hash 520996, now seen corresponding path program 1 times [2023-08-29 22:22:56,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:56,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393516913] [2023-08-29 22:22:56,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:56,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:56,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:56,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393516913] [2023-08-29 22:22:56,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393516913] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:56,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:56,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:56,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681415489] [2023-08-29 22:22:56,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:56,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:56,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:56,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:56,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:56,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 281 [2023-08-29 22:22:56,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:56,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:56,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 281 [2023-08-29 22:22:56,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:56,779 INFO L130 PetriNetUnfolder]: 487/656 cut-off events. [2023-08-29 22:22:56,779 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 22:22:56,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1330 conditions, 656 events. 487/656 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1536 event pairs, 236 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 1327. Up to 656 conditions per place. [2023-08-29 22:22:56,782 INFO L137 encePairwiseOnDemand]: 278/281 looper letters, 36 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-29 22:22:56,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 37 transitions, 156 flow [2023-08-29 22:22:56,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:56,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-08-29 22:22:56,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47686832740213525 [2023-08-29 22:22:56,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-08-29 22:22:56,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-08-29 22:22:56,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:56,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-08-29 22:22:56,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:56,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:56,790 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:56,790 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 86 flow. Second operand 3 states and 402 transitions. [2023-08-29 22:22:56,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 37 transitions, 156 flow [2023-08-29 22:22:56,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 156 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:22:56,792 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 84 flow [2023-08-29 22:22:56,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-29 22:22:56,793 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -10 predicate places. [2023-08-29 22:22:56,793 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 84 flow [2023-08-29 22:22:56,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:56,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:56,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:22:56,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 22:22:56,794 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:56,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:56,795 INFO L85 PathProgramCache]: Analyzing trace with hash 520995, now seen corresponding path program 1 times [2023-08-29 22:22:56,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:56,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588481535] [2023-08-29 22:22:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:56,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:56,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:56,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588481535] [2023-08-29 22:22:56,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588481535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:56,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:56,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:56,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462969673] [2023-08-29 22:22:56,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:56,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:56,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:56,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:56,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:56,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 281 [2023-08-29 22:22:56,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:56,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:56,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 281 [2023-08-29 22:22:56,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:57,018 INFO L130 PetriNetUnfolder]: 461/620 cut-off events. [2023-08-29 22:22:57,019 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 22:22:57,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 620 events. 461/620 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1423 event pairs, 223 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 1256. Up to 620 conditions per place. [2023-08-29 22:22:57,022 INFO L137 encePairwiseOnDemand]: 278/281 looper letters, 34 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-29 22:22:57,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 150 flow [2023-08-29 22:22:57,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:57,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-08-29 22:22:57,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4958481613285884 [2023-08-29 22:22:57,024 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-08-29 22:22:57,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-08-29 22:22:57,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:57,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-08-29 22:22:57,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,029 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 84 flow. Second operand 3 states and 418 transitions. [2023-08-29 22:22:57,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 150 flow [2023-08-29 22:22:57,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 149 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:57,030 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 81 flow [2023-08-29 22:22:57,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-29 22:22:57,031 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -11 predicate places. [2023-08-29 22:22:57,031 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 81 flow [2023-08-29 22:22:57,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:57,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:22:57,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 22:22:57,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:57,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:57,033 INFO L85 PathProgramCache]: Analyzing trace with hash 500689666, now seen corresponding path program 1 times [2023-08-29 22:22:57,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:57,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492682585] [2023-08-29 22:22:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:57,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:57,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:57,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492682585] [2023-08-29 22:22:57,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492682585] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:57,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:57,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:57,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827171133] [2023-08-29 22:22:57,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:57,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:57,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:57,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:57,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:57,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 281 [2023-08-29 22:22:57,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:57,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 281 [2023-08-29 22:22:57,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:57,304 INFO L130 PetriNetUnfolder]: 445/596 cut-off events. [2023-08-29 22:22:57,306 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 22:22:57,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1213 conditions, 596 events. 445/596 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1359 event pairs, 215 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 1209. Up to 596 conditions per place. [2023-08-29 22:22:57,310 INFO L137 encePairwiseOnDemand]: 278/281 looper letters, 32 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-29 22:22:57,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 143 flow [2023-08-29 22:22:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2023-08-29 22:22:57,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47568208778173193 [2023-08-29 22:22:57,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2023-08-29 22:22:57,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2023-08-29 22:22:57,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:57,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2023-08-29 22:22:57,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,320 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 81 flow. Second operand 3 states and 401 transitions. [2023-08-29 22:22:57,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 143 flow [2023-08-29 22:22:57,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 33 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:57,322 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 78 flow [2023-08-29 22:22:57,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-29 22:22:57,324 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -12 predicate places. [2023-08-29 22:22:57,324 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 78 flow [2023-08-29 22:22:57,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:57,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:22:57,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 22:22:57,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:57,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:57,326 INFO L85 PathProgramCache]: Analyzing trace with hash 500689665, now seen corresponding path program 1 times [2023-08-29 22:22:57,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:57,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573051544] [2023-08-29 22:22:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:57,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:57,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:57,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573051544] [2023-08-29 22:22:57,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573051544] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:57,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:57,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:57,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629533642] [2023-08-29 22:22:57,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:57,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:57,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:57,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:57,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:57,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 281 [2023-08-29 22:22:57,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:57,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 281 [2023-08-29 22:22:57,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:57,501 INFO L130 PetriNetUnfolder]: 429/572 cut-off events. [2023-08-29 22:22:57,501 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 22:22:57,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 572 events. 429/572 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1287 event pairs, 207 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 1162. Up to 572 conditions per place. [2023-08-29 22:22:57,504 INFO L137 encePairwiseOnDemand]: 278/281 looper letters, 30 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-29 22:22:57,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 31 transitions, 136 flow [2023-08-29 22:22:57,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:57,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-29 22:22:57,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697508896797153 [2023-08-29 22:22:57,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-29 22:22:57,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-29 22:22:57,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:57,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-29 22:22:57,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,510 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 78 flow. Second operand 3 states and 396 transitions. [2023-08-29 22:22:57,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 31 transitions, 136 flow [2023-08-29 22:22:57,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 31 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:57,511 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 75 flow [2023-08-29 22:22:57,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-08-29 22:22:57,512 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -13 predicate places. [2023-08-29 22:22:57,513 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 75 flow [2023-08-29 22:22:57,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:57,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:57,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 22:22:57,514 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:57,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:57,514 INFO L85 PathProgramCache]: Analyzing trace with hash 126441678, now seen corresponding path program 1 times [2023-08-29 22:22:57,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:57,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656025061] [2023-08-29 22:22:57,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:57,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:57,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:57,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656025061] [2023-08-29 22:22:57,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656025061] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:57,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:57,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:57,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528116358] [2023-08-29 22:22:57,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:57,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:57,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:57,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:57,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:57,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 281 [2023-08-29 22:22:57,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:57,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 281 [2023-08-29 22:22:57,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:57,668 INFO L130 PetriNetUnfolder]: 403/536 cut-off events. [2023-08-29 22:22:57,669 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 22:22:57,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 536 events. 403/536 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1182 event pairs, 194 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 1091. Up to 536 conditions per place. [2023-08-29 22:22:57,671 INFO L137 encePairwiseOnDemand]: 278/281 looper letters, 28 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-29 22:22:57,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 129 flow [2023-08-29 22:22:57,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:57,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-08-29 22:22:57,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4887307236061684 [2023-08-29 22:22:57,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-08-29 22:22:57,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-08-29 22:22:57,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:57,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-08-29 22:22:57,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,677 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 75 flow. Second operand 3 states and 412 transitions. [2023-08-29 22:22:57,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 129 flow [2023-08-29 22:22:57,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:57,678 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 72 flow [2023-08-29 22:22:57,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-08-29 22:22:57,679 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -14 predicate places. [2023-08-29 22:22:57,679 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 72 flow [2023-08-29 22:22:57,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:57,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:57,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 22:22:57,680 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:57,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:57,681 INFO L85 PathProgramCache]: Analyzing trace with hash 126441677, now seen corresponding path program 1 times [2023-08-29 22:22:57,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:57,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062229047] [2023-08-29 22:22:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:57,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:57,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:57,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062229047] [2023-08-29 22:22:57,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062229047] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:57,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:57,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:57,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40754092] [2023-08-29 22:22:57,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:57,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:57,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:57,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:57,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:57,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 281 [2023-08-29 22:22:57,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:57,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 281 [2023-08-29 22:22:57,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:57,813 INFO L130 PetriNetUnfolder]: 377/500 cut-off events. [2023-08-29 22:22:57,813 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 22:22:57,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1024 conditions, 500 events. 377/500 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1072 event pairs, 181 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 1020. Up to 500 conditions per place. [2023-08-29 22:22:57,815 INFO L137 encePairwiseOnDemand]: 278/281 looper letters, 26 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-29 22:22:57,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 27 transitions, 122 flow [2023-08-29 22:22:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:57,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-29 22:22:57,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465005931198102 [2023-08-29 22:22:57,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-29 22:22:57,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-29 22:22:57,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:57,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-29 22:22:57,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,831 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,831 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 72 flow. Second operand 3 states and 392 transitions. [2023-08-29 22:22:57,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 27 transitions, 122 flow [2023-08-29 22:22:57,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 121 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:57,833 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 69 flow [2023-08-29 22:22:57,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-08-29 22:22:57,834 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -15 predicate places. [2023-08-29 22:22:57,834 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 69 flow [2023-08-29 22:22:57,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:57,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:57,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:57,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 22:22:57,835 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:57,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:57,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1251377933, now seen corresponding path program 1 times [2023-08-29 22:22:57,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:57,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461161785] [2023-08-29 22:22:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:57,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:57,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:57,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461161785] [2023-08-29 22:22:57,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461161785] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:57,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:57,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:22:57,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076216305] [2023-08-29 22:22:57,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:57,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:22:57,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:57,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:22:57,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:22:58,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 281 [2023-08-29 22:22:58,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 69 flow. Second operand has 6 states, 6 states have (on average 110.5) internal successors, (663), 6 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:58,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 281 [2023-08-29 22:22:58,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:58,111 INFO L130 PetriNetUnfolder]: 313/420 cut-off events. [2023-08-29 22:22:58,112 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 22:22:58,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 420 events. 313/420 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 851 event pairs, 149 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 861. Up to 420 conditions per place. [2023-08-29 22:22:58,114 INFO L137 encePairwiseOnDemand]: 279/281 looper letters, 25 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-29 22:22:58,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 119 flow [2023-08-29 22:22:58,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:58,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-08-29 22:22:58,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199288256227758 [2023-08-29 22:22:58,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-08-29 22:22:58,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-08-29 22:22:58,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:58,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-08-29 22:22:58,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,119 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 69 flow. Second operand 3 states and 354 transitions. [2023-08-29 22:22:58,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 119 flow [2023-08-29 22:22:58,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 118 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:58,120 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 68 flow [2023-08-29 22:22:58,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-08-29 22:22:58,121 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -15 predicate places. [2023-08-29 22:22:58,121 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 68 flow [2023-08-29 22:22:58,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.5) internal successors, (663), 6 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:58,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:58,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 22:22:58,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:58,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:58,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1251377934, now seen corresponding path program 1 times [2023-08-29 22:22:58,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:58,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947656566] [2023-08-29 22:22:58,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:58,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:58,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:58,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947656566] [2023-08-29 22:22:58,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947656566] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:58,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:58,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:58,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842756228] [2023-08-29 22:22:58,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:58,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:58,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:58,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:58,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:58,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 281 [2023-08-29 22:22:58,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:58,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 281 [2023-08-29 22:22:58,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:58,245 INFO L130 PetriNetUnfolder]: 249/340 cut-off events. [2023-08-29 22:22:58,246 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 22:22:58,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 340 events. 249/340 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 643 event pairs, 117 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 702. Up to 340 conditions per place. [2023-08-29 22:22:58,248 INFO L137 encePairwiseOnDemand]: 279/281 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-29 22:22:58,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 25 transitions, 116 flow [2023-08-29 22:22:58,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-29 22:22:58,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465005931198102 [2023-08-29 22:22:58,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-29 22:22:58,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-29 22:22:58,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:58,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-29 22:22:58,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,253 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,253 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 68 flow. Second operand 3 states and 392 transitions. [2023-08-29 22:22:58,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 25 transitions, 116 flow [2023-08-29 22:22:58,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 25 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:58,254 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 67 flow [2023-08-29 22:22:58,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-08-29 22:22:58,255 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -15 predicate places. [2023-08-29 22:22:58,255 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 67 flow [2023-08-29 22:22:58,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:58,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:58,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 22:22:58,256 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:58,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:58,257 INFO L85 PathProgramCache]: Analyzing trace with hash -730289387, now seen corresponding path program 1 times [2023-08-29 22:22:58,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:58,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912732768] [2023-08-29 22:22:58,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:58,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:58,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:58,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912732768] [2023-08-29 22:22:58,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912732768] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:58,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:58,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:58,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494943060] [2023-08-29 22:22:58,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:58,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:58,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:58,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:58,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:58,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 281 [2023-08-29 22:22:58,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:58,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 281 [2023-08-29 22:22:58,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:58,616 INFO L130 PetriNetUnfolder]: 497/677 cut-off events. [2023-08-29 22:22:58,617 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 22:22:58,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1395 conditions, 677 events. 497/677 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1786 event pairs, 117 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 1391. Up to 471 conditions per place. [2023-08-29 22:22:58,620 INFO L137 encePairwiseOnDemand]: 275/281 looper letters, 41 selfloop transitions, 5 changer transitions 1/47 dead transitions. [2023-08-29 22:22:58,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 47 transitions, 212 flow [2023-08-29 22:22:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:58,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-29 22:22:58,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697508896797153 [2023-08-29 22:22:58,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-29 22:22:58,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-29 22:22:58,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:58,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-29 22:22:58,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,625 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 67 flow. Second operand 3 states and 396 transitions. [2023-08-29 22:22:58,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 47 transitions, 212 flow [2023-08-29 22:22:58,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:58,627 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 99 flow [2023-08-29 22:22:58,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-08-29 22:22:58,628 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -13 predicate places. [2023-08-29 22:22:58,628 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 99 flow [2023-08-29 22:22:58,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:58,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:58,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 22:22:58,629 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:58,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:58,629 INFO L85 PathProgramCache]: Analyzing trace with hash -932647200, now seen corresponding path program 1 times [2023-08-29 22:22:58,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:58,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061256739] [2023-08-29 22:22:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:58,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:58,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:58,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061256739] [2023-08-29 22:22:58,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061256739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:58,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:58,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:22:58,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492080734] [2023-08-29 22:22:58,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:58,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:22:58,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:58,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:22:58,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:22:58,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 281 [2023-08-29 22:22:58,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:58,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:58,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 281 [2023-08-29 22:22:58,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:59,041 INFO L130 PetriNetUnfolder]: 461/641 cut-off events. [2023-08-29 22:22:59,042 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2023-08-29 22:22:59,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1650 conditions, 641 events. 461/641 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1841 event pairs, 17 based on Foata normal form. 36/677 useless extension candidates. Maximal degree in co-relation 1645. Up to 435 conditions per place. [2023-08-29 22:22:59,046 INFO L137 encePairwiseOnDemand]: 274/281 looper letters, 50 selfloop transitions, 9 changer transitions 1/60 dead transitions. [2023-08-29 22:22:59,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 60 transitions, 297 flow [2023-08-29 22:22:59,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:22:59,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:22:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 502 transitions. [2023-08-29 22:22:59,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44661921708185054 [2023-08-29 22:22:59,048 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 502 transitions. [2023-08-29 22:22:59,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 502 transitions. [2023-08-29 22:22:59,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:59,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 502 transitions. [2023-08-29 22:22:59,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:59,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:59,052 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:59,052 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 99 flow. Second operand 4 states and 502 transitions. [2023-08-29 22:22:59,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 60 transitions, 297 flow [2023-08-29 22:22:59,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 60 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:59,054 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 135 flow [2023-08-29 22:22:59,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-08-29 22:22:59,055 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -10 predicate places. [2023-08-29 22:22:59,055 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 135 flow [2023-08-29 22:22:59,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:59,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:59,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:59,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 22:22:59,056 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:59,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:59,056 INFO L85 PathProgramCache]: Analyzing trace with hash 643872101, now seen corresponding path program 1 times [2023-08-29 22:22:59,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:59,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963872915] [2023-08-29 22:22:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:59,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:59,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:59,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963872915] [2023-08-29 22:22:59,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963872915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:59,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:59,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:22:59,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180808615] [2023-08-29 22:22:59,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:59,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:22:59,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:59,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:22:59,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:22:59,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 281 [2023-08-29 22:22:59,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:59,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:59,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 281 [2023-08-29 22:22:59,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:59,401 INFO L130 PetriNetUnfolder]: 657/915 cut-off events. [2023-08-29 22:22:59,401 INFO L131 PetriNetUnfolder]: For 659/659 co-relation queries the response was YES. [2023-08-29 22:22:59,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2539 conditions, 915 events. 657/915 cut-off events. For 659/659 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2743 event pairs, 55 based on Foata normal form. 32/947 useless extension candidates. Maximal degree in co-relation 2533. Up to 349 conditions per place. [2023-08-29 22:22:59,407 INFO L137 encePairwiseOnDemand]: 276/281 looper letters, 72 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2023-08-29 22:22:59,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 85 transitions, 479 flow [2023-08-29 22:22:59,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:22:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:22:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 662 transitions. [2023-08-29 22:22:59,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4711743772241993 [2023-08-29 22:22:59,410 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 662 transitions. [2023-08-29 22:22:59,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 662 transitions. [2023-08-29 22:22:59,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:59,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 662 transitions. [2023-08-29 22:22:59,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:59,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:59,414 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:59,414 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 135 flow. Second operand 5 states and 662 transitions. [2023-08-29 22:22:59,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 85 transitions, 479 flow [2023-08-29 22:22:59,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 85 transitions, 457 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:22:59,417 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 200 flow [2023-08-29 22:22:59,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-29 22:22:59,418 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-08-29 22:22:59,418 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 200 flow [2023-08-29 22:22:59,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:59,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:59,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:59,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 22:22:59,419 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:59,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:59,420 INFO L85 PathProgramCache]: Analyzing trace with hash -716394137, now seen corresponding path program 1 times [2023-08-29 22:22:59,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:59,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550140021] [2023-08-29 22:22:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:59,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:59,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:59,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550140021] [2023-08-29 22:22:59,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550140021] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:22:59,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442683612] [2023-08-29 22:22:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:59,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:22:59,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:22:59,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:22:59,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 22:22:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:59,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:22:59,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:23:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:23:00,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:23:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:23:00,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442683612] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:23:00,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:23:00,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-29 22:23:00,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622040146] [2023-08-29 22:23:00,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:23:00,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:23:00,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:23:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:23:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:23:00,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 281 [2023-08-29 22:23:00,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:00,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:23:00,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 281 [2023-08-29 22:23:00,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:23:00,584 INFO L130 PetriNetUnfolder]: 807/1127 cut-off events. [2023-08-29 22:23:00,584 INFO L131 PetriNetUnfolder]: For 1077/1077 co-relation queries the response was YES. [2023-08-29 22:23:00,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3770 conditions, 1127 events. 807/1127 cut-off events. For 1077/1077 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3517 event pairs, 223 based on Foata normal form. 30/1127 useless extension candidates. Maximal degree in co-relation 3762. Up to 509 conditions per place. [2023-08-29 22:23:00,593 INFO L137 encePairwiseOnDemand]: 276/281 looper letters, 72 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2023-08-29 22:23:00,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 85 transitions, 520 flow [2023-08-29 22:23:00,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:23:00,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:23:00,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 664 transitions. [2023-08-29 22:23:00,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47259786476868326 [2023-08-29 22:23:00,596 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 664 transitions. [2023-08-29 22:23:00,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 664 transitions. [2023-08-29 22:23:00,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:23:00,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 664 transitions. [2023-08-29 22:23:00,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:00,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:00,600 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:00,600 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 200 flow. Second operand 5 states and 664 transitions. [2023-08-29 22:23:00,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 85 transitions, 520 flow [2023-08-29 22:23:00,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 85 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:23:00,604 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 264 flow [2023-08-29 22:23:00,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-08-29 22:23:00,605 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-29 22:23:00,605 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 264 flow [2023-08-29 22:23:00,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:00,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:23:00,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:23:00,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 22:23:00,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-29 22:23:00,812 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:23:00,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:23:00,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1563368825, now seen corresponding path program 2 times [2023-08-29 22:23:00,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:23:00,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670104739] [2023-08-29 22:23:00,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:23:00,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:23:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:23:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:23:01,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:23:01,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670104739] [2023-08-29 22:23:01,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670104739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:23:01,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:23:01,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:23:01,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308167196] [2023-08-29 22:23:01,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:23:01,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:23:01,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:23:01,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:23:01,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:23:01,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 281 [2023-08-29 22:23:01,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:01,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:23:01,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 281 [2023-08-29 22:23:01,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:23:01,265 INFO L130 PetriNetUnfolder]: 793/1113 cut-off events. [2023-08-29 22:23:01,265 INFO L131 PetriNetUnfolder]: For 1791/1791 co-relation queries the response was YES. [2023-08-29 22:23:01,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4066 conditions, 1113 events. 793/1113 cut-off events. For 1791/1791 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3559 event pairs, 135 based on Foata normal form. 14/1097 useless extension candidates. Maximal degree in co-relation 4055. Up to 907 conditions per place. [2023-08-29 22:23:01,273 INFO L137 encePairwiseOnDemand]: 274/281 looper letters, 53 selfloop transitions, 11 changer transitions 11/75 dead transitions. [2023-08-29 22:23:01,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 503 flow [2023-08-29 22:23:01,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:23:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:23:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 501 transitions. [2023-08-29 22:23:01,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445729537366548 [2023-08-29 22:23:01,276 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 501 transitions. [2023-08-29 22:23:01,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 501 transitions. [2023-08-29 22:23:01,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:23:01,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 501 transitions. [2023-08-29 22:23:01,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:01,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:01,279 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:01,280 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 264 flow. Second operand 4 states and 501 transitions. [2023-08-29 22:23:01,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 503 flow [2023-08-29 22:23:01,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 491 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 22:23:01,288 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 288 flow [2023-08-29 22:23:01,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-08-29 22:23:01,289 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-29 22:23:01,289 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 288 flow [2023-08-29 22:23:01,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:01,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:23:01,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:23:01,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 22:23:01,290 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:23:01,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:23:01,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1892794647, now seen corresponding path program 2 times [2023-08-29 22:23:01,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:23:01,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207798203] [2023-08-29 22:23:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:23:01,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:23:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:23:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:23:01,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:23:01,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207798203] [2023-08-29 22:23:01,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207798203] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:23:01,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:23:01,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:23:01,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285086333] [2023-08-29 22:23:01,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:23:01,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:23:01,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:23:01,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:23:01,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:23:01,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 281 [2023-08-29 22:23:01,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:01,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:23:01,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 281 [2023-08-29 22:23:01,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:23:01,731 INFO L130 PetriNetUnfolder]: 881/1229 cut-off events. [2023-08-29 22:23:01,731 INFO L131 PetriNetUnfolder]: For 1852/1852 co-relation queries the response was YES. [2023-08-29 22:23:01,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4714 conditions, 1229 events. 881/1229 cut-off events. For 1852/1852 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3931 event pairs, 203 based on Foata normal form. 28/1257 useless extension candidates. Maximal degree in co-relation 4701. Up to 921 conditions per place. [2023-08-29 22:23:01,741 INFO L137 encePairwiseOnDemand]: 275/281 looper letters, 63 selfloop transitions, 10 changer transitions 3/76 dead transitions. [2023-08-29 22:23:01,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 547 flow [2023-08-29 22:23:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:23:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:23:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 504 transitions. [2023-08-29 22:23:01,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4483985765124555 [2023-08-29 22:23:01,743 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 504 transitions. [2023-08-29 22:23:01,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 504 transitions. [2023-08-29 22:23:01,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:23:01,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 504 transitions. [2023-08-29 22:23:01,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:01,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:01,747 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:01,747 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 288 flow. Second operand 4 states and 504 transitions. [2023-08-29 22:23:01,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 547 flow [2023-08-29 22:23:01,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 538 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:23:01,753 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 314 flow [2023-08-29 22:23:01,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=314, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2023-08-29 22:23:01,754 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-08-29 22:23:01,754 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 314 flow [2023-08-29 22:23:01,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:01,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:23:01,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:23:01,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 22:23:01,755 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:23:01,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:23:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash -727013529, now seen corresponding path program 1 times [2023-08-29 22:23:01,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:23:01,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835662662] [2023-08-29 22:23:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:23:01,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:23:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:23:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:23:01,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:23:01,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835662662] [2023-08-29 22:23:01,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835662662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:23:01,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267346643] [2023-08-29 22:23:01,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:23:01,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:23:01,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:23:01,912 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:23:01,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 22:23:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:23:02,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:23:02,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:23:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:23:02,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:23:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:23:02,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267346643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:23:02,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:23:02,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-29 22:23:02,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455562693] [2023-08-29 22:23:02,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:23:02,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:23:02,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:23:02,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:23:02,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:23:02,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 281 [2023-08-29 22:23:02,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 123.66666666666667) internal successors, (742), 6 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:02,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:23:02,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 281 [2023-08-29 22:23:02,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:23:02,629 INFO L130 PetriNetUnfolder]: 1771/2439 cut-off events. [2023-08-29 22:23:02,630 INFO L131 PetriNetUnfolder]: For 6830/6830 co-relation queries the response was YES. [2023-08-29 22:23:02,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9782 conditions, 2439 events. 1771/2439 cut-off events. For 6830/6830 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8995 event pairs, 413 based on Foata normal form. 104/2543 useless extension candidates. Maximal degree in co-relation 9768. Up to 1123 conditions per place. [2023-08-29 22:23:02,648 INFO L137 encePairwiseOnDemand]: 276/281 looper letters, 117 selfloop transitions, 10 changer transitions 0/127 dead transitions. [2023-08-29 22:23:02,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 127 transitions, 1005 flow [2023-08-29 22:23:02,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:23:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:23:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 672 transitions. [2023-08-29 22:23:02,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4782918149466192 [2023-08-29 22:23:02,651 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 672 transitions. [2023-08-29 22:23:02,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 672 transitions. [2023-08-29 22:23:02,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:23:02,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 672 transitions. [2023-08-29 22:23:02,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.4) internal successors, (672), 5 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:02,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:02,655 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:02,655 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 314 flow. Second operand 5 states and 672 transitions. [2023-08-29 22:23:02,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 127 transitions, 1005 flow [2023-08-29 22:23:02,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 127 transitions, 977 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-29 22:23:02,678 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 359 flow [2023-08-29 22:23:02,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=359, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2023-08-29 22:23:02,678 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-29 22:23:02,679 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 359 flow [2023-08-29 22:23:02,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 123.66666666666667) internal successors, (742), 6 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:02,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:23:02,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:23:02,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 22:23:02,885 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,SelfDestructingSolverStorable15 [2023-08-29 22:23:02,886 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:23:02,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:23:02,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1373357770, now seen corresponding path program 2 times [2023-08-29 22:23:02,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:23:02,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877425544] [2023-08-29 22:23:02,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:23:02,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:23:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:23:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:23:03,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:23:03,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877425544] [2023-08-29 22:23:03,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877425544] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:23:03,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650314714] [2023-08-29 22:23:03,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:23:03,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:23:03,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:23:03,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:23:03,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 22:23:03,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:23:03,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:23:03,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:23:03,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:23:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:23:03,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:23:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:23:03,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650314714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:23:03,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:23:03,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 22:23:03,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100954983] [2023-08-29 22:23:03,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:23:03,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:23:03,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:23:03,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:23:03,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:23:03,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 281 [2023-08-29 22:23:03,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 359 flow. Second operand has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:03,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:23:03,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 281 [2023-08-29 22:23:03,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:23:03,908 INFO L130 PetriNetUnfolder]: 2241/3081 cut-off events. [2023-08-29 22:23:03,909 INFO L131 PetriNetUnfolder]: For 9675/9675 co-relation queries the response was YES. [2023-08-29 22:23:03,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13704 conditions, 3081 events. 2241/3081 cut-off events. For 9675/9675 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12025 event pairs, 403 based on Foata normal form. 76/3157 useless extension candidates. Maximal degree in co-relation 13687. Up to 1757 conditions per place. [2023-08-29 22:23:03,936 INFO L137 encePairwiseOnDemand]: 274/281 looper letters, 126 selfloop transitions, 14 changer transitions 3/143 dead transitions. [2023-08-29 22:23:03,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 143 transitions, 1128 flow [2023-08-29 22:23:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:23:03,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:23:03,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 760 transitions. [2023-08-29 22:23:03,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45077105575326215 [2023-08-29 22:23:03,939 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 760 transitions. [2023-08-29 22:23:03,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 760 transitions. [2023-08-29 22:23:03,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:23:03,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 760 transitions. [2023-08-29 22:23:03,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 126.66666666666667) internal successors, (760), 6 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:03,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 281.0) internal successors, (1967), 7 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:03,944 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 281.0) internal successors, (1967), 7 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:03,944 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 359 flow. Second operand 6 states and 760 transitions. [2023-08-29 22:23:03,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 143 transitions, 1128 flow [2023-08-29 22:23:03,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 143 transitions, 1126 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-29 22:23:03,964 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 420 flow [2023-08-29 22:23:03,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=420, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2023-08-29 22:23:03,965 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-08-29 22:23:03,965 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 420 flow [2023-08-29 22:23:03,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:03,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:23:03,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:23:03,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 22:23:04,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:23:04,172 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:23:04,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:23:04,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1261291806, now seen corresponding path program 1 times [2023-08-29 22:23:04,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:23:04,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730501487] [2023-08-29 22:23:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:23:04,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:23:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:23:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:23:04,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:23:04,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730501487] [2023-08-29 22:23:04,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730501487] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:23:04,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152691881] [2023-08-29 22:23:04,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:23:04,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:23:04,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:23:04,617 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:23:04,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 22:23:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:23:08,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 22:23:08,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:23:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:23:26,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:23:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:23:35,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152691881] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:23:35,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:23:35,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2023-08-29 22:23:35,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918802191] [2023-08-29 22:23:35,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:23:35,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:23:35,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:23:35,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:23:35,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=135, Unknown=11, NotChecked=0, Total=182 [2023-08-29 22:23:38,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:40,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:42,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:44,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:46,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:48,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:48,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 281 [2023-08-29 22:23:48,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 420 flow. Second operand has 14 states, 14 states have (on average 108.21428571428571) internal successors, (1515), 14 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:48,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:23:48,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 281 [2023-08-29 22:23:48,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:23:58,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:00,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:03,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:06,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:13,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:18,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:21,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:23,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:25,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:30,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:32,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:33,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:37,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:40,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:42,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:45,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:47,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:49,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:52,797 INFO L130 PetriNetUnfolder]: 3235/4457 cut-off events. [2023-08-29 22:24:52,797 INFO L131 PetriNetUnfolder]: For 16491/16491 co-relation queries the response was YES. [2023-08-29 22:24:52,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20888 conditions, 4457 events. 3235/4457 cut-off events. For 16491/16491 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18737 event pairs, 395 based on Foata normal form. 2/4459 useless extension candidates. Maximal degree in co-relation 20868. Up to 3217 conditions per place. [2023-08-29 22:24:52,833 INFO L137 encePairwiseOnDemand]: 274/281 looper letters, 152 selfloop transitions, 41 changer transitions 9/202 dead transitions. [2023-08-29 22:24:52,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 202 transitions, 1558 flow [2023-08-29 22:24:52,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:24:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:24:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1093 transitions. [2023-08-29 22:24:52,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4321866350336101 [2023-08-29 22:24:52,837 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1093 transitions. [2023-08-29 22:24:52,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1093 transitions. [2023-08-29 22:24:52,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:24:52,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1093 transitions. [2023-08-29 22:24:52,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.44444444444444) internal successors, (1093), 9 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:52,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 281.0) internal successors, (2810), 10 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:52,844 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 281.0) internal successors, (2810), 10 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:52,844 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 420 flow. Second operand 9 states and 1093 transitions. [2023-08-29 22:24:52,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 202 transitions, 1558 flow [2023-08-29 22:24:52,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 202 transitions, 1505 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-08-29 22:24:52,874 INFO L231 Difference]: Finished difference. Result has 79 places, 87 transitions, 778 flow [2023-08-29 22:24:52,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=778, PETRI_PLACES=79, PETRI_TRANSITIONS=87} [2023-08-29 22:24:52,875 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 28 predicate places. [2023-08-29 22:24:52,875 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 87 transitions, 778 flow [2023-08-29 22:24:52,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 108.21428571428571) internal successors, (1515), 14 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:52,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:24:52,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:24:52,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-29 22:24:53,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-29 22:24:53,083 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:24:53,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:24:53,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1950256391, now seen corresponding path program 1 times [2023-08-29 22:24:53,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:24:53,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782607742] [2023-08-29 22:24:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:24:53,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:24:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:24:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:24:53,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:24:53,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782607742] [2023-08-29 22:24:53,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782607742] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:24:53,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175234514] [2023-08-29 22:24:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:24:53,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:24:53,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:24:53,677 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:24:53,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 22:24:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:24:54,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:24:54,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:25:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:25:24,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:25:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:25:37,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175234514] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:25:37,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:25:37,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-29 22:25:37,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258269036] [2023-08-29 22:25:37,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:25:37,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 22:25:37,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:25:37,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 22:25:37,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=167, Unknown=16, NotChecked=0, Total=240 [2023-08-29 22:25:39,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:41,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:43,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:45,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:47,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:49,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:51,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:53,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:55,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:55,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 281 [2023-08-29 22:25:55,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 87 transitions, 778 flow. Second operand has 16 states, 16 states have (on average 108.0625) internal successors, (1729), 16 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:25:55,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:25:55,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 281 [2023-08-29 22:25:55,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:25:56,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:32,560 WARN L222 SmtUtils]: Spent 34.23s on a formula simplification. DAG size of input: 86 DAG size of output: 31 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:26:34,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:37,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:39,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:52,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:58,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:02,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:04,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:06,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:08,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:10,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:14,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:16,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:18,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:25,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:27,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:29,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:31,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:33,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:35,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:38,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:40,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:42,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:44,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:46,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:48,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:50,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:52,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:54,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:55,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:57,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:59,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:05,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:08,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:12,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:13,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:16,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:19,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:22,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:24,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:26,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:28,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:31,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:34,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:37,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:39,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:41,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:43,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:43,923 INFO L130 PetriNetUnfolder]: 4942/6866 cut-off events. [2023-08-29 22:28:43,923 INFO L131 PetriNetUnfolder]: For 28585/28585 co-relation queries the response was YES. [2023-08-29 22:28:43,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33563 conditions, 6866 events. 4942/6866 cut-off events. For 28585/28585 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 31309 event pairs, 743 based on Foata normal form. 34/6900 useless extension candidates. Maximal degree in co-relation 33538. Up to 4755 conditions per place. [2023-08-29 22:28:44,020 INFO L137 encePairwiseOnDemand]: 264/281 looper letters, 230 selfloop transitions, 91 changer transitions 20/341 dead transitions. [2023-08-29 22:28:44,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 341 transitions, 2918 flow [2023-08-29 22:28:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 22:28:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 22:28:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2027 transitions. [2023-08-29 22:28:44,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4243248900983881 [2023-08-29 22:28:44,027 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2027 transitions. [2023-08-29 22:28:44,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2027 transitions. [2023-08-29 22:28:44,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:28:44,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2027 transitions. [2023-08-29 22:28:44,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 119.23529411764706) internal successors, (2027), 17 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:28:44,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 281.0) internal successors, (5058), 18 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:28:44,038 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 281.0) internal successors, (5058), 18 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:28:44,039 INFO L175 Difference]: Start difference. First operand has 79 places, 87 transitions, 778 flow. Second operand 17 states and 2027 transitions. [2023-08-29 22:28:44,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 341 transitions, 2918 flow [2023-08-29 22:28:44,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 341 transitions, 2857 flow, removed 26 selfloop flow, removed 1 redundant places. [2023-08-29 22:28:44,088 INFO L231 Difference]: Finished difference. Result has 105 places, 172 transitions, 1787 flow [2023-08-29 22:28:44,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1787, PETRI_PLACES=105, PETRI_TRANSITIONS=172} [2023-08-29 22:28:44,088 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 54 predicate places. [2023-08-29 22:28:44,088 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 172 transitions, 1787 flow [2023-08-29 22:28:44,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 108.0625) internal successors, (1729), 16 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:28:44,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:28:44,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:28:44,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:28:44,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:28:44,299 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:28:44,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:28:44,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1181634503, now seen corresponding path program 2 times [2023-08-29 22:28:44,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:28:44,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653128416] [2023-08-29 22:28:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:28:44,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:28:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:28:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:28:45,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:28:45,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653128416] [2023-08-29 22:28:45,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653128416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:28:45,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586784536] [2023-08-29 22:28:45,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:28:45,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:28:45,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:28:45,189 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:28:45,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 22:28:46,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:28:46,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:28:46,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 22:28:46,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:29:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:29:00,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:29:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:29:05,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586784536] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:29:05,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:29:05,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2023-08-29 22:29:05,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542597357] [2023-08-29 22:29:05,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:29:05,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:29:05,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:29:05,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:29:05,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=131, Unknown=4, NotChecked=0, Total=182 [2023-08-29 22:29:07,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:09,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:11,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:14,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:17,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:20,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:23,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:25,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:26,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 281 [2023-08-29 22:29:26,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 172 transitions, 1787 flow. Second operand has 14 states, 14 states have (on average 108.64285714285714) internal successors, (1521), 14 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:29:26,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:29:26,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 281 [2023-08-29 22:29:26,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:30:12,626 WARN L222 SmtUtils]: Spent 43.07s on a formula simplification. DAG size of input: 91 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:30:14,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:16,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:18,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:21,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:24,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:27,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:28,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:30,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:31:46,053 WARN L222 SmtUtils]: Spent 1.18m on a formula simplification. DAG size of input: 111 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:31:48,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:31:50,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:31:52,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:31:54,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:31:56,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:31:58,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:01,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:03,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:05,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:06,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:07,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:09,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:11,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:13,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:16,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:18,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:20,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:22,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:25,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:30,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:37,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:39,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:41,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:43,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:46,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:47,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:49,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:51,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:53,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:55,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:58,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:32:59,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:01,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:04,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:06,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:08,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:11,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:12,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:15,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:17,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:18,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:21,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:27,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:30,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:32,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:35,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:37,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:39,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:42,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:44,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:48,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:50,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:52,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:55,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:33:59,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:34:02,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:34:06,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:34:10,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:34:13,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:34:15,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:34:17,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:34:20,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:34:22,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:34:24,097 INFO L130 PetriNetUnfolder]: 5970/8333 cut-off events. [2023-08-29 22:34:24,097 INFO L131 PetriNetUnfolder]: For 59482/59482 co-relation queries the response was YES. [2023-08-29 22:34:24,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50321 conditions, 8333 events. 5970/8333 cut-off events. For 59482/59482 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 39678 event pairs, 855 based on Foata normal form. 3/8336 useless extension candidates. Maximal degree in co-relation 50284. Up to 6756 conditions per place. [2023-08-29 22:34:24,163 INFO L137 encePairwiseOnDemand]: 268/281 looper letters, 296 selfloop transitions, 61 changer transitions 6/363 dead transitions. [2023-08-29 22:34:24,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 363 transitions, 4075 flow [2023-08-29 22:34:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 22:34:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 22:34:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1668 transitions. [2023-08-29 22:34:24,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42399593289273 [2023-08-29 22:34:24,169 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1668 transitions. [2023-08-29 22:34:24,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1668 transitions. [2023-08-29 22:34:24,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:34:24,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1668 transitions. [2023-08-29 22:34:24,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 119.14285714285714) internal successors, (1668), 14 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:34:24,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 281.0) internal successors, (4215), 15 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:34:24,226 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 281.0) internal successors, (4215), 15 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:34:24,226 INFO L175 Difference]: Start difference. First operand has 105 places, 172 transitions, 1787 flow. Second operand 14 states and 1668 transitions. [2023-08-29 22:34:24,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 363 transitions, 4075 flow [2023-08-29 22:34:24,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 363 transitions, 3808 flow, removed 129 selfloop flow, removed 1 redundant places. [2023-08-29 22:34:24,500 INFO L231 Difference]: Finished difference. Result has 124 places, 228 transitions, 2382 flow [2023-08-29 22:34:24,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2382, PETRI_PLACES=124, PETRI_TRANSITIONS=228} [2023-08-29 22:34:24,501 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 73 predicate places. [2023-08-29 22:34:24,507 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 228 transitions, 2382 flow [2023-08-29 22:34:24,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 108.64285714285714) internal successors, (1521), 14 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:34:24,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:34:24,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:34:24,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 22:34:24,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:34:24,722 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:34:24,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:34:24,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1068972898, now seen corresponding path program 2 times [2023-08-29 22:34:24,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:34:24,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318594479] [2023-08-29 22:34:24,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:34:24,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:34:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:34:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:34:25,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:34:25,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318594479] [2023-08-29 22:34:25,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318594479] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:34:25,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833729791] [2023-08-29 22:34:25,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:34:25,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:34:25,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:34:25,185 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:34:25,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 22:34:29,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:34:29,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:34:29,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:34:29,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:34:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:34:43,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:34:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:34:48,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833729791] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:34:48,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:34:48,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-29 22:34:48,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603302364] [2023-08-29 22:34:48,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:34:48,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 22:34:48,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:34:48,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 22:34:48,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=167, Unknown=5, NotChecked=0, Total=240 [2023-08-29 22:34:50,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:34:53,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:34:55,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:34:57,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:34:58,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 281 [2023-08-29 22:34:58,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 228 transitions, 2382 flow. Second operand has 16 states, 16 states have (on average 107.6875) internal successors, (1723), 16 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:34:58,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:34:58,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 281 [2023-08-29 22:34:58,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:35:11,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:35:13,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:35:17,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:35:19,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:35:29,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:35:31,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:35:42,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:35:44,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:35:50,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:35:53,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:35:55,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:35:58,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:01,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:03,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:06,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:08,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:11,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:13,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:17,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:20,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:22,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:24,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:27,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:29,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:31,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:32,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:36,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:36,509 INFO L130 PetriNetUnfolder]: 7838/10989 cut-off events. [2023-08-29 22:36:36,510 INFO L131 PetriNetUnfolder]: For 97495/97495 co-relation queries the response was YES. [2023-08-29 22:36:36,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69578 conditions, 10989 events. 7838/10989 cut-off events. For 97495/97495 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 55927 event pairs, 652 based on Foata normal form. 18/11007 useless extension candidates. Maximal degree in co-relation 69533. Up to 8543 conditions per place. [2023-08-29 22:36:36,609 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 395 selfloop transitions, 104 changer transitions 16/515 dead transitions. [2023-08-29 22:36:36,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 515 transitions, 5702 flow [2023-08-29 22:36:36,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 22:36:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 22:36:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1921 transitions. [2023-08-29 22:36:36,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42726868327402134 [2023-08-29 22:36:36,616 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1921 transitions. [2023-08-29 22:36:36,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1921 transitions. [2023-08-29 22:36:36,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:36:36,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1921 transitions. [2023-08-29 22:36:36,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 120.0625) internal successors, (1921), 16 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:36:36,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 281.0) internal successors, (4777), 17 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:36:36,626 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 281.0) internal successors, (4777), 17 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:36:36,626 INFO L175 Difference]: Start difference. First operand has 124 places, 228 transitions, 2382 flow. Second operand 16 states and 1921 transitions. [2023-08-29 22:36:36,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 515 transitions, 5702 flow [2023-08-29 22:36:36,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 515 transitions, 5388 flow, removed 157 selfloop flow, removed 0 redundant places. [2023-08-29 22:36:36,961 INFO L231 Difference]: Finished difference. Result has 149 places, 315 transitions, 3415 flow [2023-08-29 22:36:36,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3415, PETRI_PLACES=149, PETRI_TRANSITIONS=315} [2023-08-29 22:36:36,962 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 98 predicate places. [2023-08-29 22:36:36,962 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 315 transitions, 3415 flow [2023-08-29 22:36:36,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 107.6875) internal successors, (1723), 16 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:36:36,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:36:36,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:36:36,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-29 22:36:37,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:36:37,170 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:36:37,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:36:37,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1665110769, now seen corresponding path program 3 times [2023-08-29 22:36:37,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:36:37,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112149435] [2023-08-29 22:36:37,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:36:37,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:36:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:36:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:36:37,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:36:37,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112149435] [2023-08-29 22:36:37,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112149435] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:36:37,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320769036] [2023-08-29 22:36:37,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:36:37,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:36:37,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:36:37,445 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:36:37,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 22:36:39,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 22:36:39,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:36:39,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:36:39,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:36:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:36:40,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:36:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:36:40,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320769036] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:36:40,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:36:40,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-29 22:36:40,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345392590] [2023-08-29 22:36:40,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:36:40,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:36:40,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:36:40,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:36:40,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:36:40,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 281 [2023-08-29 22:36:40,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 315 transitions, 3415 flow. Second operand has 12 states, 12 states have (on average 112.33333333333333) internal successors, (1348), 12 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:36:40,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:36:40,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 281 [2023-08-29 22:36:40,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:36:43,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:36:47,537 INFO L130 PetriNetUnfolder]: 9106/13010 cut-off events. [2023-08-29 22:36:47,538 INFO L131 PetriNetUnfolder]: For 179156/179156 co-relation queries the response was YES. [2023-08-29 22:36:47,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90710 conditions, 13010 events. 9106/13010 cut-off events. For 179156/179156 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 70798 event pairs, 588 based on Foata normal form. 862/13872 useless extension candidates. Maximal degree in co-relation 90654. Up to 5078 conditions per place. [2023-08-29 22:36:47,676 INFO L137 encePairwiseOnDemand]: 274/281 looper letters, 631 selfloop transitions, 128 changer transitions 33/792 dead transitions. [2023-08-29 22:36:47,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 792 transitions, 9555 flow [2023-08-29 22:36:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-29 22:36:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-29 22:36:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2335 transitions. [2023-08-29 22:36:47,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4373478179434351 [2023-08-29 22:36:47,683 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2335 transitions. [2023-08-29 22:36:47,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2335 transitions. [2023-08-29 22:36:47,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:36:47,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2335 transitions. [2023-08-29 22:36:47,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 122.89473684210526) internal successors, (2335), 19 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:36:47,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 281.0) internal successors, (5620), 20 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:36:47,694 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 281.0) internal successors, (5620), 20 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:36:47,694 INFO L175 Difference]: Start difference. First operand has 149 places, 315 transitions, 3415 flow. Second operand 19 states and 2335 transitions. [2023-08-29 22:36:47,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 792 transitions, 9555 flow [2023-08-29 22:36:48,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 792 transitions, 9016 flow, removed 265 selfloop flow, removed 1 redundant places. [2023-08-29 22:36:48,203 INFO L231 Difference]: Finished difference. Result has 178 places, 357 transitions, 4134 flow [2023-08-29 22:36:48,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4134, PETRI_PLACES=178, PETRI_TRANSITIONS=357} [2023-08-29 22:36:48,203 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 127 predicate places. [2023-08-29 22:36:48,203 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 357 transitions, 4134 flow [2023-08-29 22:36:48,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 112.33333333333333) internal successors, (1348), 12 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:36:48,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:36:48,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:36:48,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 22:36:48,404 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,SelfDestructingSolverStorable21 [2023-08-29 22:36:48,405 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:36:48,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:36:48,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1726134654, now seen corresponding path program 1 times [2023-08-29 22:36:48,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:36:48,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235692592] [2023-08-29 22:36:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:36:48,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:36:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:36:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:36:48,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:36:48,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235692592] [2023-08-29 22:36:48,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235692592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:36:48,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495417179] [2023-08-29 22:36:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:36:48,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:36:48,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:36:48,549 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:36:48,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 22:36:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:36:48,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:36:48,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:36:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:36:48,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:36:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:36:48,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495417179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:36:48,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:36:48,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-08-29 22:36:48,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937823388] [2023-08-29 22:36:48,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:36:48,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:36:48,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:36:48,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:36:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:36:48,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 281 [2023-08-29 22:36:48,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 357 transitions, 4134 flow. Second operand has 7 states, 7 states have (on average 114.85714285714286) internal successors, (804), 7 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:36:48,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:36:48,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 281 [2023-08-29 22:36:48,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:36:50,956 INFO L130 PetriNetUnfolder]: 9154/13212 cut-off events. [2023-08-29 22:36:50,956 INFO L131 PetriNetUnfolder]: For 249269/249269 co-relation queries the response was YES. [2023-08-29 22:36:51,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99555 conditions, 13212 events. 9154/13212 cut-off events. For 249269/249269 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 73157 event pairs, 337 based on Foata normal form. 188/13390 useless extension candidates. Maximal degree in co-relation 99486. Up to 5371 conditions per place. [2023-08-29 22:36:51,078 INFO L137 encePairwiseOnDemand]: 274/281 looper letters, 481 selfloop transitions, 149 changer transitions 17/647 dead transitions. [2023-08-29 22:36:51,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 647 transitions, 8980 flow [2023-08-29 22:36:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:36:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:36:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 987 transitions. [2023-08-29 22:36:51,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390569395017794 [2023-08-29 22:36:51,080 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 987 transitions. [2023-08-29 22:36:51,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 987 transitions. [2023-08-29 22:36:51,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:36:51,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 987 transitions. [2023-08-29 22:36:51,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.375) internal successors, (987), 8 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:36:51,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:36:51,085 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:36:51,085 INFO L175 Difference]: Start difference. First operand has 178 places, 357 transitions, 4134 flow. Second operand 8 states and 987 transitions. [2023-08-29 22:36:51,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 647 transitions, 8980 flow [2023-08-29 22:36:51,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 647 transitions, 7861 flow, removed 512 selfloop flow, removed 4 redundant places. [2023-08-29 22:36:51,715 INFO L231 Difference]: Finished difference. Result has 182 places, 402 transitions, 4693 flow [2023-08-29 22:36:51,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4693, PETRI_PLACES=182, PETRI_TRANSITIONS=402} [2023-08-29 22:36:51,715 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 131 predicate places. [2023-08-29 22:36:51,716 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 402 transitions, 4693 flow [2023-08-29 22:36:51,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.85714285714286) internal successors, (804), 7 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:36:51,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:36:51,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:36:51,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 22:36:51,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:36:51,918 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:36:51,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:36:51,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1327856207, now seen corresponding path program 3 times [2023-08-29 22:36:51,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:36:51,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832682712] [2023-08-29 22:36:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:36:51,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:36:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:36:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:36:52,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:36:52,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832682712] [2023-08-29 22:36:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832682712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:36:52,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461919633] [2023-08-29 22:36:52,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:36:52,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:36:52,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:36:52,102 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:36:52,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process Killed by 15