./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-difference-det.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 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:56:21,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:56:21,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:56:21,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:56:21,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:56:21,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:56:21,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:56:21,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:56:21,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:56:21,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:56:21,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:56:21,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:56:21,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:56:21,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:56:21,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:56:21,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:56:21,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:56:21,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:56:21,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:56:21,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:56:21,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:56:21,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:56:21,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:56:21,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:56:21,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:56:21,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:56:21,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:56:21,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:56:21,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:56:21,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:56:21,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:56:21,421 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:56:21,423 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:56:21,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:56:21,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:56:21,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:56:21,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:56:21,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:56:21,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:56:21,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:56:21,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:56:21,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:56:21,477 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:56:21,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:56:21,478 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:56:21,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:56:21,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:56:21,480 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:56:21,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:56:21,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:56:21,481 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:56:21,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:56:21,482 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:56:21,482 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:56:21,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:56:21,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:56:21,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:56:21,483 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:56:21,483 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:56:21,483 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:56:21,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:56:21,484 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:56:21,484 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:56:21,484 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:56:21,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:56:21,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:56:21,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:56:21,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:56:21,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:56:21,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:56:21,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:56:21,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:56:21,486 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:56:21,486 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:56:21,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:56:21,487 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:56:21,487 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:56:21,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:56:21,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:56:21,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:56:21,837 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:56:21,837 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:56:21,838 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-09-01 02:56:22,973 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:56:23,220 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:56:23,221 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-09-01 02:56:23,228 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cc8790dc/cd83510cd6014fe1a0f752455ae0f889/FLAG70d6b5297 [2023-09-01 02:56:23,251 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cc8790dc/cd83510cd6014fe1a0f752455ae0f889 [2023-09-01 02:56:23,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:56:23,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:56:23,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:56:23,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:56:23,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:56:23,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:56:23" (1/1) ... [2023-09-01 02:56:23,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75c3941b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:23, skipping insertion in model container [2023-09-01 02:56:23,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:56:23" (1/1) ... [2023-09-01 02:56:23,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:56:23,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:56:23,468 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c[2507,2520] [2023-09-01 02:56:23,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:56:23,489 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:56:23,529 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c[2507,2520] [2023-09-01 02:56:23,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:56:23,602 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:56:23,603 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:56:23,609 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:56:23,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:23 WrapperNode [2023-09-01 02:56:23,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:56:23,612 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:56:23,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:56:23,612 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:56:23,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:23" (1/1) ... [2023-09-01 02:56:23,635 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:23" (1/1) ... [2023-09-01 02:56:23,664 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2023-09-01 02:56:23,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:56:23,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:56:23,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:56:23,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:56:23,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:23" (1/1) ... [2023-09-01 02:56:23,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:23" (1/1) ... [2023-09-01 02:56:23,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:23" (1/1) ... [2023-09-01 02:56:23,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:23" (1/1) ... [2023-09-01 02:56:23,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:23" (1/1) ... [2023-09-01 02:56:23,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:23" (1/1) ... [2023-09-01 02:56:23,709 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:23" (1/1) ... [2023-09-01 02:56:23,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:23" (1/1) ... [2023-09-01 02:56:23,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:56:23,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:56:23,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:56:23,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:56:23,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:23" (1/1) ... [2023-09-01 02:56:23,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:56:23,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:56:23,754 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 02:56:23,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 02:56:23,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:56:23,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:56:23,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:56:23,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:56:23,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:56:23,796 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:56:23,796 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:56:23,796 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 02:56:23,796 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 02:56:23,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 02:56:23,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:56:23,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 02:56:23,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:56:23,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:56:23,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:56:23,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:56:23,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 02:56:23,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:56:23,799 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:56:23,912 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:56:23,915 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:56:24,263 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:56:24,314 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:56:24,315 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 02:56:24,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:56:24 BoogieIcfgContainer [2023-09-01 02:56:24,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:56:24,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:56:24,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:56:24,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:56:24,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:56:23" (1/3) ... [2023-09-01 02:56:24,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216a0b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:56:24, skipping insertion in model container [2023-09-01 02:56:24,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:23" (2/3) ... [2023-09-01 02:56:24,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216a0b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:56:24, skipping insertion in model container [2023-09-01 02:56:24,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:56:24" (3/3) ... [2023-09-01 02:56:24,327 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-09-01 02:56:24,339 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:56:24,339 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-09-01 02:56:24,340 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:56:24,407 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 02:56:24,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 145 transitions, 322 flow [2023-09-01 02:56:24,499 INFO L130 PetriNetUnfolder]: 9/141 cut-off events. [2023-09-01 02:56:24,505 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 02:56:24,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 141 events. 9/141 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 157 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2023-09-01 02:56:24,511 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 145 transitions, 322 flow [2023-09-01 02:56:24,515 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 137 transitions, 298 flow [2023-09-01 02:56:24,518 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:56:24,529 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 137 transitions, 298 flow [2023-09-01 02:56:24,532 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 137 transitions, 298 flow [2023-09-01 02:56:24,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 137 transitions, 298 flow [2023-09-01 02:56:24,591 INFO L130 PetriNetUnfolder]: 9/137 cut-off events. [2023-09-01 02:56:24,591 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 02:56:24,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 137 events. 9/137 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 156 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2023-09-01 02:56:24,595 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2023-09-01 02:56:28,818 INFO L134 LiptonReduction]: Checked pairs total: 3417 [2023-09-01 02:56:28,818 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-09-01 02:56:28,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:56:28,841 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;@7bf7c9bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:56:28,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-09-01 02:56:28,843 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-09-01 02:56:28,843 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:56:28,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:28,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 02:56:28,845 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)] === [2023-09-01 02:56:28,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:28,849 INFO L85 PathProgramCache]: Analyzing trace with hash 580, now seen corresponding path program 1 times [2023-09-01 02:56:28,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:28,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948423191] [2023-09-01 02:56:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:28,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:28,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:28,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948423191] [2023-09-01 02:56:28,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948423191] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:28,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:28,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 02:56:28,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124861474] [2023-09-01 02:56:28,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:28,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 02:56:28,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:28,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 02:56:28,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 02:56:28,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 272 [2023-09-01 02:56:28,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:28,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:28,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 272 [2023-09-01 02:56:28,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:29,367 INFO L130 PetriNetUnfolder]: 2524/3163 cut-off events. [2023-09-01 02:56:29,367 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-09-01 02:56:29,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6422 conditions, 3163 events. 2524/3163 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11409 event pairs, 1182 based on Foata normal form. 0/1489 useless extension candidates. Maximal degree in co-relation 4966. Up to 3134 conditions per place. [2023-09-01 02:56:29,392 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 39 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-09-01 02:56:29,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 188 flow [2023-09-01 02:56:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 02:56:29,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 02:56:29,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 296 transitions. [2023-09-01 02:56:29,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2023-09-01 02:56:29,413 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 296 transitions. [2023-09-01 02:56:29,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 296 transitions. [2023-09-01 02:56:29,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:29,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 296 transitions. [2023-09-01 02:56:29,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 148.0) internal successors, (296), 2 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:29,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:29,426 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:29,427 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 116 flow. Second operand 2 states and 296 transitions. [2023-09-01 02:56:29,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 188 flow [2023-09-01 02:56:29,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 02:56:29,436 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2023-09-01 02:56:29,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-09-01 02:56:29,440 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-09-01 02:56:29,441 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2023-09-01 02:56:29,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:29,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:29,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:56:29,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 02:56:29,446 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)] === [2023-09-01 02:56:29,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:29,448 INFO L85 PathProgramCache]: Analyzing trace with hash 571786, now seen corresponding path program 1 times [2023-09-01 02:56:29,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:29,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409087254] [2023-09-01 02:56:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:29,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:29,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:29,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409087254] [2023-09-01 02:56:29,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409087254] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:29,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:29,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:56:29,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126639512] [2023-09-01 02:56:29,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:29,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:56:29,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:29,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:56:29,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:56:29,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 272 [2023-09-01 02:56:29,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:29,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:29,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 272 [2023-09-01 02:56:29,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:30,074 INFO L130 PetriNetUnfolder]: 2413/3022 cut-off events. [2023-09-01 02:56:30,074 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 02:56:30,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6057 conditions, 3022 events. 2413/3022 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 10789 event pairs, 1127 based on Foata normal form. 0/1434 useless extension candidates. Maximal degree in co-relation 6054. Up to 2992 conditions per place. [2023-09-01 02:56:30,093 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 36 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-09-01 02:56:30,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 164 flow [2023-09-01 02:56:30,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:56:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:56:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2023-09-01 02:56:30,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742647058823529 [2023-09-01 02:56:30,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2023-09-01 02:56:30,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2023-09-01 02:56:30,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:30,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2023-09-01 02:56:30,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:30,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:30,099 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:30,099 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 387 transitions. [2023-09-01 02:56:30,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 164 flow [2023-09-01 02:56:30,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 02:56:30,123 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 92 flow [2023-09-01 02:56:30,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-09-01 02:56:30,124 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-09-01 02:56:30,124 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 92 flow [2023-09-01 02:56:30,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:30,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:30,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:56:30,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 02:56:30,125 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)] === [2023-09-01 02:56:30,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:30,126 INFO L85 PathProgramCache]: Analyzing trace with hash 571787, now seen corresponding path program 1 times [2023-09-01 02:56:30,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:30,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505969496] [2023-09-01 02:56:30,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:30,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:30,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:30,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505969496] [2023-09-01 02:56:30,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505969496] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:30,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:30,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:56:30,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344656444] [2023-09-01 02:56:30,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:30,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:56:30,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:30,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:56:30,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:56:30,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 272 [2023-09-01 02:56:30,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 92 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) [2023-09-01 02:56:30,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:30,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 272 [2023-09-01 02:56:30,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:30,506 INFO L130 PetriNetUnfolder]: 2302/2881 cut-off events. [2023-09-01 02:56:30,506 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 02:56:30,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5777 conditions, 2881 events. 2302/2881 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 10153 event pairs, 1072 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 5773. Up to 2851 conditions per place. [2023-09-01 02:56:30,525 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 34 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-09-01 02:56:30,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 158 flow [2023-09-01 02:56:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:56:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:56:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-09-01 02:56:30,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49387254901960786 [2023-09-01 02:56:30,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-09-01 02:56:30,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-09-01 02:56:30,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:30,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-09-01 02:56:30,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:30,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:30,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:30,533 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 92 flow. Second operand 3 states and 403 transitions. [2023-09-01 02:56:30,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 158 flow [2023-09-01 02:56:30,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:30,534 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 89 flow [2023-09-01 02:56:30,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-09-01 02:56:30,536 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-09-01 02:56:30,538 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 89 flow [2023-09-01 02:56:30,539 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) [2023-09-01 02:56:30,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:30,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:56:30,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 02:56:30,540 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)] === [2023-09-01 02:56:30,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:30,540 INFO L85 PathProgramCache]: Analyzing trace with hash 549501602, now seen corresponding path program 1 times [2023-09-01 02:56:30,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:30,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803296794] [2023-09-01 02:56:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:30,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:30,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:30,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803296794] [2023-09-01 02:56:30,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803296794] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:30,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:30,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:56:30,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706633914] [2023-09-01 02:56:30,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:30,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:56:30,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:30,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:56:30,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:56:30,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 272 [2023-09-01 02:56:30,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 89 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) [2023-09-01 02:56:30,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:30,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 272 [2023-09-01 02:56:30,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:30,947 INFO L130 PetriNetUnfolder]: 2256/2817 cut-off events. [2023-09-01 02:56:30,948 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 02:56:30,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5650 conditions, 2817 events. 2256/2817 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9859 event pairs, 1050 based on Foata normal form. 0/1355 useless extension candidates. Maximal degree in co-relation 5646. Up to 2787 conditions per place. [2023-09-01 02:56:30,962 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 32 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-09-01 02:56:30,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 151 flow [2023-09-01 02:56:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:56:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:56:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2023-09-01 02:56:30,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142156862745096 [2023-09-01 02:56:30,964 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2023-09-01 02:56:30,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2023-09-01 02:56:30,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:30,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2023-09-01 02:56:30,966 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) [2023-09-01 02:56:30,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:30,968 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:30,968 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 89 flow. Second operand 3 states and 401 transitions. [2023-09-01 02:56:30,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 151 flow [2023-09-01 02:56:30,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:30,970 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 86 flow [2023-09-01 02:56:30,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, 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=86, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-09-01 02:56:30,971 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -12 predicate places. [2023-09-01 02:56:30,971 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 86 flow [2023-09-01 02:56:30,971 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) [2023-09-01 02:56:30,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:30,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:56:30,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 02:56:30,972 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)] === [2023-09-01 02:56:30,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:30,973 INFO L85 PathProgramCache]: Analyzing trace with hash 549501601, now seen corresponding path program 1 times [2023-09-01 02:56:30,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:30,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844496186] [2023-09-01 02:56:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:30,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:31,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:31,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844496186] [2023-09-01 02:56:31,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844496186] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:31,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:31,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:56:31,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897609851] [2023-09-01 02:56:31,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:31,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:56:31,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:31,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:56:31,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:56:31,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 272 [2023-09-01 02:56:31,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:31,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:31,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 272 [2023-09-01 02:56:31,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:31,271 INFO L130 PetriNetUnfolder]: 2210/2753 cut-off events. [2023-09-01 02:56:31,271 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 02:56:31,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5523 conditions, 2753 events. 2210/2753 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9590 event pairs, 1028 based on Foata normal form. 0/1331 useless extension candidates. Maximal degree in co-relation 5519. Up to 2723 conditions per place. [2023-09-01 02:56:31,286 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 30 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-09-01 02:56:31,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 144 flow [2023-09-01 02:56:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:56:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:56:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-09-01 02:56:31,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46691176470588236 [2023-09-01 02:56:31,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-09-01 02:56:31,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-09-01 02:56:31,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:31,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-09-01 02:56:31,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:31,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:31,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:31,293 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 86 flow. Second operand 3 states and 381 transitions. [2023-09-01 02:56:31,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 144 flow [2023-09-01 02:56:31,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 35 transitions, 143 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:31,295 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 83 flow [2023-09-01 02:56:31,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, 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=83, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-09-01 02:56:31,298 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-09-01 02:56:31,298 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 83 flow [2023-09-01 02:56:31,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:31,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:31,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:56:31,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 02:56:31,299 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)] === [2023-09-01 02:56:31,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:31,300 INFO L85 PathProgramCache]: Analyzing trace with hash -209926295, now seen corresponding path program 1 times [2023-09-01 02:56:31,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:31,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876859032] [2023-09-01 02:56:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:31,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:31,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:31,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876859032] [2023-09-01 02:56:31,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876859032] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:31,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:31,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:56:31,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275699539] [2023-09-01 02:56:31,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:31,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:56:31,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:31,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:56:31,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:56:31,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 272 [2023-09-01 02:56:31,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:31,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:31,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 272 [2023-09-01 02:56:31,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:31,604 INFO L130 PetriNetUnfolder]: 2107/2620 cut-off events. [2023-09-01 02:56:31,604 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 02:56:31,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5258 conditions, 2620 events. 2107/2620 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9003 event pairs, 981 based on Foata normal form. 0/1284 useless extension candidates. Maximal degree in co-relation 5254. Up to 2590 conditions per place. [2023-09-01 02:56:31,622 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 28 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-09-01 02:56:31,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 137 flow [2023-09-01 02:56:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:56:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:56:31,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-09-01 02:56:31,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48651960784313725 [2023-09-01 02:56:31,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-09-01 02:56:31,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-09-01 02:56:31,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:31,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-09-01 02:56:31,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:31,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:31,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:31,629 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 83 flow. Second operand 3 states and 397 transitions. [2023-09-01 02:56:31,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 137 flow [2023-09-01 02:56:31,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:31,631 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 80 flow [2023-09-01 02:56:31,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, 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=80, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-09-01 02:56:31,635 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -14 predicate places. [2023-09-01 02:56:31,635 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 80 flow [2023-09-01 02:56:31,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:31,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:31,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:56:31,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 02:56:31,636 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)] === [2023-09-01 02:56:31,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:31,637 INFO L85 PathProgramCache]: Analyzing trace with hash -209926294, now seen corresponding path program 1 times [2023-09-01 02:56:31,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:31,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295493408] [2023-09-01 02:56:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:31,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:31,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:31,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295493408] [2023-09-01 02:56:31,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295493408] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:31,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:31,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:56:31,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926983597] [2023-09-01 02:56:31,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:31,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:56:31,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:31,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:56:31,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:56:31,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 272 [2023-09-01 02:56:31,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:31,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:31,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 272 [2023-09-01 02:56:31,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:31,879 INFO L130 PetriNetUnfolder]: 2004/2487 cut-off events. [2023-09-01 02:56:31,879 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 02:56:31,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4993 conditions, 2487 events. 2004/2487 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 8420 event pairs, 934 based on Foata normal form. 0/1237 useless extension candidates. Maximal degree in co-relation 4989. Up to 2457 conditions per place. [2023-09-01 02:56:31,891 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 26 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-09-01 02:56:31,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 31 transitions, 130 flow [2023-09-01 02:56:31,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:56:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:56:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-09-01 02:56:31,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46200980392156865 [2023-09-01 02:56:31,893 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-09-01 02:56:31,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-09-01 02:56:31,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:31,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-09-01 02:56:31,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:31,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:31,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:31,896 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 80 flow. Second operand 3 states and 377 transitions. [2023-09-01 02:56:31,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 31 transitions, 130 flow [2023-09-01 02:56:31,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 31 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:31,898 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 77 flow [2023-09-01 02:56:31,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=38, 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=77, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-09-01 02:56:31,898 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-09-01 02:56:31,898 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 77 flow [2023-09-01 02:56:31,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:31,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:31,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:56:31,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 02:56:31,899 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)] === [2023-09-01 02:56:31,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:31,899 INFO L85 PathProgramCache]: Analyzing trace with hash 124305830, now seen corresponding path program 1 times [2023-09-01 02:56:31,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:31,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864327567] [2023-09-01 02:56:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:31,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:31,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:31,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864327567] [2023-09-01 02:56:31,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864327567] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:31,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:31,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:56:31,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640422092] [2023-09-01 02:56:31,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:31,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:56:31,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:31,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:56:31,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:56:32,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 272 [2023-09-01 02:56:32,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 77 flow. Second operand has 6 states, 6 states have (on average 105.5) internal successors, (633), 6 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:32,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:32,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 272 [2023-09-01 02:56:32,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:32,242 INFO L130 PetriNetUnfolder]: 1590/1992 cut-off events. [2023-09-01 02:56:32,242 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 02:56:32,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 1992 events. 1590/1992 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6624 event pairs, 736 based on Foata normal form. 0/1039 useless extension candidates. Maximal degree in co-relation 4000. Up to 1962 conditions per place. [2023-09-01 02:56:32,251 INFO L137 encePairwiseOnDemand]: 270/272 looper letters, 25 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-09-01 02:56:32,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 127 flow [2023-09-01 02:56:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:56:32,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:56:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2023-09-01 02:56:32,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41544117647058826 [2023-09-01 02:56:32,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2023-09-01 02:56:32,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2023-09-01 02:56:32,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:32,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2023-09-01 02:56:32,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:32,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:32,256 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:32,256 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 77 flow. Second operand 3 states and 339 transitions. [2023-09-01 02:56:32,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 127 flow [2023-09-01 02:56:32,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:32,258 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 76 flow [2023-09-01 02:56:32,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-09-01 02:56:32,258 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-09-01 02:56:32,258 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 76 flow [2023-09-01 02:56:32,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.5) internal successors, (633), 6 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:32,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:32,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:56:32,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 02:56:32,259 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)] === [2023-09-01 02:56:32,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:32,260 INFO L85 PathProgramCache]: Analyzing trace with hash 124305831, now seen corresponding path program 1 times [2023-09-01 02:56:32,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:32,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079922688] [2023-09-01 02:56:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:32,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:32,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:32,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079922688] [2023-09-01 02:56:32,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079922688] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:32,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:32,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:56:32,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491527918] [2023-09-01 02:56:32,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:32,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:56:32,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:32,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:56:32,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:56:32,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 272 [2023-09-01 02:56:32,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 76 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) [2023-09-01 02:56:32,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:32,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 272 [2023-09-01 02:56:32,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:32,614 INFO L130 PetriNetUnfolder]: 1176/1497 cut-off events. [2023-09-01 02:56:32,614 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 02:56:32,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3015 conditions, 1497 events. 1176/1497 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4863 event pairs, 538 based on Foata normal form. 0/841 useless extension candidates. Maximal degree in co-relation 3011. Up to 1467 conditions per place. [2023-09-01 02:56:32,622 INFO L137 encePairwiseOnDemand]: 270/272 looper letters, 24 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-09-01 02:56:32,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 124 flow [2023-09-01 02:56:32,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:56:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:56:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-09-01 02:56:32,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2023-09-01 02:56:32,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-09-01 02:56:32,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-09-01 02:56:32,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:32,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-09-01 02:56:32,627 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) [2023-09-01 02:56:32,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:32,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:32,629 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 76 flow. Second operand 3 states and 392 transitions. [2023-09-01 02:56:32,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 124 flow [2023-09-01 02:56:32,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:32,631 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 75 flow [2023-09-01 02:56:32,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=38, 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=75, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-09-01 02:56:32,632 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-09-01 02:56:32,632 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 75 flow [2023-09-01 02:56:32,633 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) [2023-09-01 02:56:32,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:32,633 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, 1] [2023-09-01 02:56:32,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 02:56:32,633 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)] === [2023-09-01 02:56:32,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:32,634 INFO L85 PathProgramCache]: Analyzing trace with hash 32800811, now seen corresponding path program 1 times [2023-09-01 02:56:32,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:32,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567230762] [2023-09-01 02:56:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:32,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:32,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:32,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567230762] [2023-09-01 02:56:32,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567230762] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:32,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:32,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:56:32,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100638967] [2023-09-01 02:56:32,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:32,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:56:32,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:32,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:56:32,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:56:32,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 272 [2023-09-01 02:56:32,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 75 flow. Second operand has 3 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) [2023-09-01 02:56:32,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:32,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 272 [2023-09-01 02:56:32,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:32,970 INFO L130 PetriNetUnfolder]: 1537/1954 cut-off events. [2023-09-01 02:56:32,970 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-09-01 02:56:32,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3956 conditions, 1954 events. 1537/1954 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6401 event pairs, 141 based on Foata normal form. 1/1126 useless extension candidates. Maximal degree in co-relation 3952. Up to 1733 conditions per place. [2023-09-01 02:56:32,980 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 41 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-09-01 02:56:32,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 220 flow [2023-09-01 02:56:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:56:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:56:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-09-01 02:56:32,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183823529411765 [2023-09-01 02:56:32,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-09-01 02:56:32,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-09-01 02:56:32,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:32,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-09-01 02:56:32,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:32,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:32,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:32,987 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 75 flow. Second operand 3 states and 423 transitions. [2023-09-01 02:56:32,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 220 flow [2023-09-01 02:56:32,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:32,988 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 107 flow [2023-09-01 02:56:32,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-09-01 02:56:32,989 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-09-01 02:56:32,989 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 107 flow [2023-09-01 02:56:32,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-09-01 02:56:32,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:32,990 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, 1, 1] [2023-09-01 02:56:32,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 02:56:32,990 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)] === [2023-09-01 02:56:32,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:32,991 INFO L85 PathProgramCache]: Analyzing trace with hash -63029285, now seen corresponding path program 1 times [2023-09-01 02:56:32,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:32,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861504536] [2023-09-01 02:56:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:32,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:33,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:33,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861504536] [2023-09-01 02:56:33,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861504536] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:33,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:33,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:56:33,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850099300] [2023-09-01 02:56:33,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:33,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:56:33,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:33,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:56:33,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:56:33,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 272 [2023-09-01 02:56:33,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:33,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:33,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 272 [2023-09-01 02:56:33,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:33,407 INFO L130 PetriNetUnfolder]: 2315/3045 cut-off events. [2023-09-01 02:56:33,407 INFO L131 PetriNetUnfolder]: For 844/844 co-relation queries the response was YES. [2023-09-01 02:56:33,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7475 conditions, 3045 events. 2315/3045 cut-off events. For 844/844 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 12248 event pairs, 620 based on Foata normal form. 34/3049 useless extension candidates. Maximal degree in co-relation 7470. Up to 1705 conditions per place. [2023-09-01 02:56:33,419 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 80 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2023-09-01 02:56:33,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 87 transitions, 442 flow [2023-09-01 02:56:33,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:56:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:56:33,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 669 transitions. [2023-09-01 02:56:33,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919117647058823 [2023-09-01 02:56:33,422 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 669 transitions. [2023-09-01 02:56:33,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 669 transitions. [2023-09-01 02:56:33,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:33,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 669 transitions. [2023-09-01 02:56:33,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:33,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:33,427 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:33,427 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 107 flow. Second operand 5 states and 669 transitions. [2023-09-01 02:56:33,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 87 transitions, 442 flow [2023-09-01 02:56:33,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 87 transitions, 429 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:33,429 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 137 flow [2023-09-01 02:56:33,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-09-01 02:56:33,430 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2023-09-01 02:56:33,430 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 137 flow [2023-09-01 02:56:33,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:33,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:33,431 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, 1, 1] [2023-09-01 02:56:33,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 02:56:33,431 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)] === [2023-09-01 02:56:33,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:33,432 INFO L85 PathProgramCache]: Analyzing trace with hash 241380879, now seen corresponding path program 1 times [2023-09-01 02:56:33,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:33,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524432215] [2023-09-01 02:56:33,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:33,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:33,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:33,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524432215] [2023-09-01 02:56:33,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524432215] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:56:33,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860539514] [2023-09-01 02:56:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:33,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:56:33,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:56:33,505 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:56:33,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 02:56:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:33,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:56:33,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:33,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:56:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:33,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860539514] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:56:33,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:56:33,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 02:56:33,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146847943] [2023-09-01 02:56:33,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:56:33,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:56:33,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:33,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:56:33,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:56:33,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-09-01 02:56:33,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 137 flow. Second operand has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:33,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:33,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-09-01 02:56:33,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:34,229 INFO L130 PetriNetUnfolder]: 3231/4291 cut-off events. [2023-09-01 02:56:34,230 INFO L131 PetriNetUnfolder]: For 3518/3899 co-relation queries the response was YES. [2023-09-01 02:56:34,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11993 conditions, 4291 events. 3231/4291 cut-off events. For 3518/3899 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 19750 event pairs, 339 based on Foata normal form. 477/4675 useless extension candidates. Maximal degree in co-relation 11985. Up to 1856 conditions per place. [2023-09-01 02:56:34,256 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 89 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-09-01 02:56:34,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 97 transitions, 540 flow [2023-09-01 02:56:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:56:34,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:56:34,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 665 transitions. [2023-09-01 02:56:34,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4889705882352941 [2023-09-01 02:56:34,259 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 665 transitions. [2023-09-01 02:56:34,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 665 transitions. [2023-09-01 02:56:34,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:34,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 665 transitions. [2023-09-01 02:56:34,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:34,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:34,263 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:34,263 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 137 flow. Second operand 5 states and 665 transitions. [2023-09-01 02:56:34,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 97 transitions, 540 flow [2023-09-01 02:56:34,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 97 transitions, 521 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:34,269 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 167 flow [2023-09-01 02:56:34,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-09-01 02:56:34,269 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2023-09-01 02:56:34,270 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 167 flow [2023-09-01 02:56:34,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:34,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:34,270 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, 1, 1] [2023-09-01 02:56:34,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 02:56:34,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 02:56:34,477 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)] === [2023-09-01 02:56:34,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:34,477 INFO L85 PathProgramCache]: Analyzing trace with hash -921950725, now seen corresponding path program 2 times [2023-09-01 02:56:34,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:34,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018276142] [2023-09-01 02:56:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:34,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:34,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:34,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018276142] [2023-09-01 02:56:34,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018276142] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:34,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:34,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:56:34,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125726304] [2023-09-01 02:56:34,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:34,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:56:34,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:34,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:56:34,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:56:34,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 272 [2023-09-01 02:56:34,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 167 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:34,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:34,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 272 [2023-09-01 02:56:34,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:35,195 INFO L130 PetriNetUnfolder]: 4823/6498 cut-off events. [2023-09-01 02:56:35,195 INFO L131 PetriNetUnfolder]: For 8653/9187 co-relation queries the response was YES. [2023-09-01 02:56:35,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19894 conditions, 6498 events. 4823/6498 cut-off events. For 8653/9187 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31847 event pairs, 1245 based on Foata normal form. 571/6979 useless extension candidates. Maximal degree in co-relation 19883. Up to 3423 conditions per place. [2023-09-01 02:56:35,229 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 95 selfloop transitions, 7 changer transitions 0/105 dead transitions. [2023-09-01 02:56:35,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 105 transitions, 630 flow [2023-09-01 02:56:35,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:56:35,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:56:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 673 transitions. [2023-09-01 02:56:35,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4948529411764706 [2023-09-01 02:56:35,233 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 673 transitions. [2023-09-01 02:56:35,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 673 transitions. [2023-09-01 02:56:35,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:35,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 673 transitions. [2023-09-01 02:56:35,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:35,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:35,238 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:35,238 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 167 flow. Second operand 5 states and 673 transitions. [2023-09-01 02:56:35,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 105 transitions, 630 flow [2023-09-01 02:56:35,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 105 transitions, 625 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:35,251 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 211 flow [2023-09-01 02:56:35,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-09-01 02:56:35,252 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2023-09-01 02:56:35,252 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 211 flow [2023-09-01 02:56:35,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:35,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:35,253 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, 1, 1] [2023-09-01 02:56:35,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 02:56:35,253 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)] === [2023-09-01 02:56:35,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash 550245957, now seen corresponding path program 2 times [2023-09-01 02:56:35,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:35,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719452552] [2023-09-01 02:56:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:35,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:35,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:35,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719452552] [2023-09-01 02:56:35,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719452552] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:56:35,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509637061] [2023-09-01 02:56:35,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:56:35,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:56:35,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:56:35,329 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:56:35,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 02:56:35,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:56:35,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:56:35,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:56:35,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:35,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:56:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:35,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509637061] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:56:35,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:56:35,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 02:56:35,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398487487] [2023-09-01 02:56:35,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:56:35,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:56:35,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:35,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:56:35,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:56:35,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-09-01 02:56:35,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 211 flow. Second operand has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:35,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:35,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-09-01 02:56:35,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:36,501 INFO L130 PetriNetUnfolder]: 6729/9130 cut-off events. [2023-09-01 02:56:36,502 INFO L131 PetriNetUnfolder]: For 17455/18932 co-relation queries the response was YES. [2023-09-01 02:56:36,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31362 conditions, 9130 events. 6729/9130 cut-off events. For 17455/18932 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 47787 event pairs, 883 based on Foata normal form. 1627/10614 useless extension candidates. Maximal degree in co-relation 31348. Up to 3720 conditions per place. [2023-09-01 02:56:36,565 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 101 selfloop transitions, 6 changer transitions 0/111 dead transitions. [2023-09-01 02:56:36,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 111 transitions, 756 flow [2023-09-01 02:56:36,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:56:36,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:56:36,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 663 transitions. [2023-09-01 02:56:36,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2023-09-01 02:56:36,568 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 663 transitions. [2023-09-01 02:56:36,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 663 transitions. [2023-09-01 02:56:36,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:36,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 663 transitions. [2023-09-01 02:56:36,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.6) internal successors, (663), 5 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) [2023-09-01 02:56:36,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:36,572 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:36,573 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 211 flow. Second operand 5 states and 663 transitions. [2023-09-01 02:56:36,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 111 transitions, 756 flow [2023-09-01 02:56:36,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 111 transitions, 716 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:36,591 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 242 flow [2023-09-01 02:56:36,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-09-01 02:56:36,592 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-09-01 02:56:36,592 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 242 flow [2023-09-01 02:56:36,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:36,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:36,593 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, 1, 1] [2023-09-01 02:56:36,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 02:56:36,799 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,SelfDestructingSolverStorable13 [2023-09-01 02:56:36,800 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)] === [2023-09-01 02:56:36,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:36,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1393353835, now seen corresponding path program 3 times [2023-09-01 02:56:36,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:36,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135693196] [2023-09-01 02:56:36,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:36,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:36,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:36,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135693196] [2023-09-01 02:56:36,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135693196] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:56:36,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553291183] [2023-09-01 02:56:36,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:56:36,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:56:36,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:56:36,893 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:56:36,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 02:56:37,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 02:56:37,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:56:37,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:56:37,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:37,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:56:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:37,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553291183] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:56:37,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:56:37,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 02:56:37,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49209562] [2023-09-01 02:56:37,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:56:37,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:56:37,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:37,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:56:37,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:56:37,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-09-01 02:56:37,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 242 flow. Second operand has 10 states, 10 states have (on average 121.1) internal successors, (1211), 10 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:37,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:37,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-09-01 02:56:37,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:38,426 INFO L130 PetriNetUnfolder]: 8827/11997 cut-off events. [2023-09-01 02:56:38,426 INFO L131 PetriNetUnfolder]: For 30624/32500 co-relation queries the response was YES. [2023-09-01 02:56:38,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42694 conditions, 11997 events. 8827/11997 cut-off events. For 30624/32500 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 66009 event pairs, 1277 based on Foata normal form. 1998/13734 useless extension candidates. Maximal degree in co-relation 42677. Up to 4818 conditions per place. [2023-09-01 02:56:38,515 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 162 selfloop transitions, 14 changer transitions 0/180 dead transitions. [2023-09-01 02:56:38,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 180 transitions, 1220 flow [2023-09-01 02:56:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 02:56:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 02:56:38,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1067 transitions. [2023-09-01 02:56:38,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49034926470588236 [2023-09-01 02:56:38,519 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1067 transitions. [2023-09-01 02:56:38,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1067 transitions. [2023-09-01 02:56:38,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:38,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1067 transitions. [2023-09-01 02:56:38,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 133.375) internal successors, (1067), 8 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:38,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 272.0) internal successors, (2448), 9 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:38,525 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 272.0) internal successors, (2448), 9 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:38,525 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 242 flow. Second operand 8 states and 1067 transitions. [2023-09-01 02:56:38,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 180 transitions, 1220 flow [2023-09-01 02:56:38,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 180 transitions, 1204 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:38,548 INFO L231 Difference]: Finished difference. Result has 76 places, 53 transitions, 352 flow [2023-09-01 02:56:38,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=352, PETRI_PLACES=76, PETRI_TRANSITIONS=53} [2023-09-01 02:56:38,549 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2023-09-01 02:56:38,549 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 53 transitions, 352 flow [2023-09-01 02:56:38,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 121.1) internal successors, (1211), 10 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:38,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:38,550 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, 1, 1] [2023-09-01 02:56:38,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 02:56:38,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:56:38,759 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)] === [2023-09-01 02:56:38,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash 97335621, now seen corresponding path program 3 times [2023-09-01 02:56:38,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:38,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601203514] [2023-09-01 02:56:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:38,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:38,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:38,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601203514] [2023-09-01 02:56:38,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601203514] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:56:38,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884561127] [2023-09-01 02:56:38,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:56:38,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:56:38,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:56:38,831 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:56:38,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 02:56:38,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 02:56:38,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:56:38,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:56:38,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:38,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:56:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:39,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884561127] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:56:39,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:56:39,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 02:56:39,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586260224] [2023-09-01 02:56:39,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:56:39,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:56:39,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:56:39,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:56:39,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-09-01 02:56:39,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 53 transitions, 352 flow. Second operand has 10 states, 10 states have (on average 120.5) internal successors, (1205), 10 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:39,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:39,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-09-01 02:56:39,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:40,981 INFO L130 PetriNetUnfolder]: 13654/18446 cut-off events. [2023-09-01 02:56:40,981 INFO L131 PetriNetUnfolder]: For 63489/68123 co-relation queries the response was YES. [2023-09-01 02:56:41,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71449 conditions, 18446 events. 13654/18446 cut-off events. For 63489/68123 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 103635 event pairs, 1256 based on Foata normal form. 2378/20468 useless extension candidates. Maximal degree in co-relation 71428. Up to 7661 conditions per place. [2023-09-01 02:56:41,099 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 195 selfloop transitions, 14 changer transitions 0/214 dead transitions. [2023-09-01 02:56:41,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 214 transitions, 1795 flow [2023-09-01 02:56:41,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 02:56:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 02:56:41,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1061 transitions. [2023-09-01 02:56:41,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875919117647059 [2023-09-01 02:56:41,102 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1061 transitions. [2023-09-01 02:56:41,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1061 transitions. [2023-09-01 02:56:41,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:41,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1061 transitions. [2023-09-01 02:56:41,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:41,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 272.0) internal successors, (2448), 9 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:41,108 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 272.0) internal successors, (2448), 9 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:41,108 INFO L175 Difference]: Start difference. First operand has 76 places, 53 transitions, 352 flow. Second operand 8 states and 1061 transitions. [2023-09-01 02:56:41,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 214 transitions, 1795 flow [2023-09-01 02:56:41,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 214 transitions, 1675 flow, removed 24 selfloop flow, removed 4 redundant places. [2023-09-01 02:56:41,175 INFO L231 Difference]: Finished difference. Result has 83 places, 61 transitions, 438 flow [2023-09-01 02:56:41,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=438, PETRI_PLACES=83, PETRI_TRANSITIONS=61} [2023-09-01 02:56:41,176 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2023-09-01 02:56:41,176 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 61 transitions, 438 flow [2023-09-01 02:56:41,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.5) internal successors, (1205), 10 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:41,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:41,177 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, 1, 1] [2023-09-01 02:56:41,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 02:56:41,382 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,SelfDestructingSolverStorable15 [2023-09-01 02:56:41,383 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)] === [2023-09-01 02:56:41,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:41,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1620542779, now seen corresponding path program 4 times [2023-09-01 02:56:41,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:41,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189565404] [2023-09-01 02:56:41,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:41,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:41,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:41,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189565404] [2023-09-01 02:56:41,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189565404] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:56:41,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45114450] [2023-09-01 02:56:41,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:56:41,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:56:41,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:56:41,456 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:56:41,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 02:56:41,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:56:41,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:56:41,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:56:41,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:41,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:56:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:41,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45114450] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:56:41,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:56:41,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 02:56:41,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516770402] [2023-09-01 02:56:41,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:56:41,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:56:41,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:56:41,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:56:41,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-09-01 02:56:41,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 61 transitions, 438 flow. Second operand has 10 states, 10 states have (on average 120.7) internal successors, (1207), 10 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:41,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:41,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-09-01 02:56:41,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:43,437 INFO L130 PetriNetUnfolder]: 13244/17949 cut-off events. [2023-09-01 02:56:43,437 INFO L131 PetriNetUnfolder]: For 76286/80676 co-relation queries the response was YES. [2023-09-01 02:56:43,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74000 conditions, 17949 events. 13244/17949 cut-off events. For 76286/80676 co-relation queries the response was YES. Maximal size of possible extension queue 1082. Compared 100990 event pairs, 3032 based on Foata normal form. 2130/19585 useless extension candidates. Maximal degree in co-relation 73975. Up to 7964 conditions per place. [2023-09-01 02:56:43,547 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 129 selfloop transitions, 17 changer transitions 0/151 dead transitions. [2023-09-01 02:56:43,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 151 transitions, 1310 flow [2023-09-01 02:56:43,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:56:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:56:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 670 transitions. [2023-09-01 02:56:43,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49264705882352944 [2023-09-01 02:56:43,550 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 670 transitions. [2023-09-01 02:56:43,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 670 transitions. [2023-09-01 02:56:43,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:43,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 670 transitions. [2023-09-01 02:56:43,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:43,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:43,554 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:43,554 INFO L175 Difference]: Start difference. First operand has 83 places, 61 transitions, 438 flow. Second operand 5 states and 670 transitions. [2023-09-01 02:56:43,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 151 transitions, 1310 flow [2023-09-01 02:56:43,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 151 transitions, 1232 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-09-01 02:56:43,665 INFO L231 Difference]: Finished difference. Result has 86 places, 67 transitions, 528 flow [2023-09-01 02:56:43,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=528, PETRI_PLACES=86, PETRI_TRANSITIONS=67} [2023-09-01 02:56:43,666 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2023-09-01 02:56:43,666 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 67 transitions, 528 flow [2023-09-01 02:56:43,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.7) internal successors, (1207), 10 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:43,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:43,667 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, 1, 1] [2023-09-01 02:56:43,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 02:56:43,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 02:56:43,873 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)] === [2023-09-01 02:56:43,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:43,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1130502097, now seen corresponding path program 4 times [2023-09-01 02:56:43,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:43,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348904172] [2023-09-01 02:56:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:43,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:43,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:43,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348904172] [2023-09-01 02:56:43,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348904172] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:56:43,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625062363] [2023-09-01 02:56:43,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:56:43,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:56:43,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:56:43,962 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:56:43,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 02:56:44,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:56:44,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:56:44,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:56:44,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:44,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:56:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:44,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625062363] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:56:44,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:56:44,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 02:56:44,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746884065] [2023-09-01 02:56:44,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:56:44,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:56:44,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:44,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:56:44,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:56:44,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-09-01 02:56:44,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 67 transitions, 528 flow. Second operand has 10 states, 10 states have (on average 120.5) internal successors, (1205), 10 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:44,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:44,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-09-01 02:56:44,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:45,636 INFO L130 PetriNetUnfolder]: 12879/17695 cut-off events. [2023-09-01 02:56:45,636 INFO L131 PetriNetUnfolder]: For 73467/77835 co-relation queries the response was YES. [2023-09-01 02:56:45,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74803 conditions, 17695 events. 12879/17695 cut-off events. For 73467/77835 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 100026 event pairs, 3258 based on Foata normal form. 2208/19585 useless extension candidates. Maximal degree in co-relation 74775. Up to 8766 conditions per place. [2023-09-01 02:56:45,803 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 138 selfloop transitions, 17 changer transitions 0/161 dead transitions. [2023-09-01 02:56:45,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 161 transitions, 1553 flow [2023-09-01 02:56:45,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:56:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:56:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 664 transitions. [2023-09-01 02:56:45,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48823529411764705 [2023-09-01 02:56:45,805 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 664 transitions. [2023-09-01 02:56:45,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 664 transitions. [2023-09-01 02:56:45,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:45,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 664 transitions. [2023-09-01 02:56:45,807 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) [2023-09-01 02:56:45,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:45,810 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:45,810 INFO L175 Difference]: Start difference. First operand has 86 places, 67 transitions, 528 flow. Second operand 5 states and 664 transitions. [2023-09-01 02:56:45,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 161 transitions, 1553 flow [2023-09-01 02:56:45,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 161 transitions, 1466 flow, removed 25 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:45,995 INFO L231 Difference]: Finished difference. Result has 92 places, 73 transitions, 619 flow [2023-09-01 02:56:45,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=619, PETRI_PLACES=92, PETRI_TRANSITIONS=73} [2023-09-01 02:56:45,996 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 37 predicate places. [2023-09-01 02:56:45,996 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 73 transitions, 619 flow [2023-09-01 02:56:46,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.5) internal successors, (1205), 10 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:46,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:46,003 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, 1, 1] [2023-09-01 02:56:46,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 02:56:46,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 02:56:46,210 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)] === [2023-09-01 02:56:46,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:46,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2056442747, now seen corresponding path program 5 times [2023-09-01 02:56:46,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:46,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960273020] [2023-09-01 02:56:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:46,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:46,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:46,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960273020] [2023-09-01 02:56:46,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960273020] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:46,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:46,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:56:46,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586486915] [2023-09-01 02:56:46,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:46,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:56:46,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:46,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:56:46,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:56:46,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-09-01 02:56:46,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 73 transitions, 619 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:46,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:46,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-09-01 02:56:46,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:48,215 INFO L130 PetriNetUnfolder]: 11934/16360 cut-off events. [2023-09-01 02:56:48,215 INFO L131 PetriNetUnfolder]: For 83443/87431 co-relation queries the response was YES. [2023-09-01 02:56:48,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71623 conditions, 16360 events. 11934/16360 cut-off events. For 83443/87431 co-relation queries the response was YES. Maximal size of possible extension queue 987. Compared 92987 event pairs, 2718 based on Foata normal form. 1860/17813 useless extension candidates. Maximal degree in co-relation 71592. Up to 9074 conditions per place. [2023-09-01 02:56:48,306 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 179 selfloop transitions, 16 changer transitions 0/201 dead transitions. [2023-09-01 02:56:48,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 201 transitions, 1989 flow [2023-09-01 02:56:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:56:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:56:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 803 transitions. [2023-09-01 02:56:48,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49203431372549017 [2023-09-01 02:56:48,309 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 803 transitions. [2023-09-01 02:56:48,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 803 transitions. [2023-09-01 02:56:48,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:48,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 803 transitions. [2023-09-01 02:56:48,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.83333333333334) internal successors, (803), 6 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:48,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:48,314 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:48,314 INFO L175 Difference]: Start difference. First operand has 92 places, 73 transitions, 619 flow. Second operand 6 states and 803 transitions. [2023-09-01 02:56:48,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 201 transitions, 1989 flow [2023-09-01 02:56:48,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 201 transitions, 1876 flow, removed 33 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:48,459 INFO L231 Difference]: Finished difference. Result has 98 places, 77 transitions, 674 flow [2023-09-01 02:56:48,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=674, PETRI_PLACES=98, PETRI_TRANSITIONS=77} [2023-09-01 02:56:48,459 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2023-09-01 02:56:48,459 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 77 transitions, 674 flow [2023-09-01 02:56:48,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:48,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:48,460 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, 1, 1] [2023-09-01 02:56:48,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 02:56:48,460 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)] === [2023-09-01 02:56:48,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash 962061305, now seen corresponding path program 1 times [2023-09-01 02:56:48,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:48,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531448899] [2023-09-01 02:56:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:48,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:48,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:48,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531448899] [2023-09-01 02:56:48,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531448899] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:56:48,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173290334] [2023-09-01 02:56:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:48,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:56:48,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:56:48,529 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:56:48,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 02:56:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:48,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:56:48,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:48,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:56:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:48,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173290334] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:56:48,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:56:48,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 02:56:48,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114092229] [2023-09-01 02:56:48,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:56:48,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:56:48,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:48,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:56:48,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:56:48,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-09-01 02:56:48,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 77 transitions, 674 flow. Second operand has 8 states, 8 states have (on average 121.375) internal successors, (971), 8 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:48,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:48,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-09-01 02:56:48,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:50,483 INFO L130 PetriNetUnfolder]: 12571/17111 cut-off events. [2023-09-01 02:56:50,483 INFO L131 PetriNetUnfolder]: For 84743/89371 co-relation queries the response was YES. [2023-09-01 02:56:50,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76924 conditions, 17111 events. 12571/17111 cut-off events. For 84743/89371 co-relation queries the response was YES. Maximal size of possible extension queue 1064. Compared 96979 event pairs, 1276 based on Foata normal form. 2178/18934 useless extension candidates. Maximal degree in co-relation 76891. Up to 8878 conditions per place. [2023-09-01 02:56:50,595 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 141 selfloop transitions, 16 changer transitions 0/163 dead transitions. [2023-09-01 02:56:50,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 163 transitions, 1624 flow [2023-09-01 02:56:50,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:56:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:56:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 657 transitions. [2023-09-01 02:56:50,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48308823529411765 [2023-09-01 02:56:50,597 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 657 transitions. [2023-09-01 02:56:50,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 657 transitions. [2023-09-01 02:56:50,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:50,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 657 transitions. [2023-09-01 02:56:50,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:50,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:50,601 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:50,602 INFO L175 Difference]: Start difference. First operand has 98 places, 77 transitions, 674 flow. Second operand 5 states and 657 transitions. [2023-09-01 02:56:50,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 163 transitions, 1624 flow [2023-09-01 02:56:50,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 163 transitions, 1568 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-09-01 02:56:50,774 INFO L231 Difference]: Finished difference. Result has 101 places, 79 transitions, 700 flow [2023-09-01 02:56:50,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=700, PETRI_PLACES=101, PETRI_TRANSITIONS=79} [2023-09-01 02:56:50,775 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2023-09-01 02:56:50,775 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 79 transitions, 700 flow [2023-09-01 02:56:50,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 121.375) internal successors, (971), 8 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:50,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:50,776 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, 1, 1] [2023-09-01 02:56:50,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 02:56:50,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:56:50,983 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)] === [2023-09-01 02:56:50,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:50,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1080256256, now seen corresponding path program 1 times [2023-09-01 02:56:50,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:50,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569506778] [2023-09-01 02:56:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:50,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:51,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:51,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569506778] [2023-09-01 02:56:51,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569506778] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:51,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:51,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:56:51,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667188654] [2023-09-01 02:56:51,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:51,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:56:51,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:51,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:56:51,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:56:51,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 272 [2023-09-01 02:56:51,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 79 transitions, 700 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:51,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:51,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 272 [2023-09-01 02:56:51,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:52,711 INFO L130 PetriNetUnfolder]: 13307/18167 cut-off events. [2023-09-01 02:56:52,711 INFO L131 PetriNetUnfolder]: For 99103/105226 co-relation queries the response was YES. [2023-09-01 02:56:52,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83406 conditions, 18167 events. 13307/18167 cut-off events. For 99103/105226 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 102343 event pairs, 1302 based on Foata normal form. 3136/21050 useless extension candidates. Maximal degree in co-relation 83371. Up to 8763 conditions per place. [2023-09-01 02:56:52,982 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 150 selfloop transitions, 15 changer transitions 0/173 dead transitions. [2023-09-01 02:56:52,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 173 transitions, 1825 flow [2023-09-01 02:56:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:56:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:56:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 665 transitions. [2023-09-01 02:56:52,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4889705882352941 [2023-09-01 02:56:52,984 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 665 transitions. [2023-09-01 02:56:52,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 665 transitions. [2023-09-01 02:56:52,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:52,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 665 transitions. [2023-09-01 02:56:52,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:52,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:52,988 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:52,989 INFO L175 Difference]: Start difference. First operand has 101 places, 79 transitions, 700 flow. Second operand 5 states and 665 transitions. [2023-09-01 02:56:52,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 173 transitions, 1825 flow [2023-09-01 02:56:53,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 173 transitions, 1771 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 02:56:53,169 INFO L231 Difference]: Finished difference. Result has 105 places, 81 transitions, 746 flow [2023-09-01 02:56:53,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=746, PETRI_PLACES=105, PETRI_TRANSITIONS=81} [2023-09-01 02:56:53,169 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2023-09-01 02:56:53,170 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 81 transitions, 746 flow [2023-09-01 02:56:53,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:53,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:53,170 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, 1, 1] [2023-09-01 02:56:53,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 02:56:53,170 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)] === [2023-09-01 02:56:53,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:53,171 INFO L85 PathProgramCache]: Analyzing trace with hash -337942745, now seen corresponding path program 2 times [2023-09-01 02:56:53,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:53,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789557020] [2023-09-01 02:56:53,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:53,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:53,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:53,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789557020] [2023-09-01 02:56:53,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789557020] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:53,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:53,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:56:53,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423553793] [2023-09-01 02:56:53,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:53,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:56:53,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:53,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:56:53,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:56:53,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-09-01 02:56:53,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 81 transitions, 746 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:53,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:53,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-09-01 02:56:53,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:55,049 INFO L130 PetriNetUnfolder]: 13076/17848 cut-off events. [2023-09-01 02:56:55,050 INFO L131 PetriNetUnfolder]: For 117216/122833 co-relation queries the response was YES. [2023-09-01 02:56:55,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85583 conditions, 17848 events. 13076/17848 cut-off events. For 117216/122833 co-relation queries the response was YES. Maximal size of possible extension queue 1120. Compared 100475 event pairs, 4262 based on Foata normal form. 2311/19669 useless extension candidates. Maximal degree in co-relation 85546. Up to 9470 conditions per place. [2023-09-01 02:56:55,173 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 153 selfloop transitions, 16 changer transitions 0/176 dead transitions. [2023-09-01 02:56:55,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 176 transitions, 1850 flow [2023-09-01 02:56:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:56:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:56:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 671 transitions. [2023-09-01 02:56:55,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933823529411765 [2023-09-01 02:56:55,175 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 671 transitions. [2023-09-01 02:56:55,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 671 transitions. [2023-09-01 02:56:55,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:55,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 671 transitions. [2023-09-01 02:56:55,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:55,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:55,179 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:55,180 INFO L175 Difference]: Start difference. First operand has 105 places, 81 transitions, 746 flow. Second operand 5 states and 671 transitions. [2023-09-01 02:56:55,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 176 transitions, 1850 flow [2023-09-01 02:56:55,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 176 transitions, 1790 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-09-01 02:56:55,414 INFO L231 Difference]: Finished difference. Result has 108 places, 82 transitions, 771 flow [2023-09-01 02:56:55,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=771, PETRI_PLACES=108, PETRI_TRANSITIONS=82} [2023-09-01 02:56:55,415 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2023-09-01 02:56:55,415 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 82 transitions, 771 flow [2023-09-01 02:56:55,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:55,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:55,416 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, 1, 1] [2023-09-01 02:56:55,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 02:56:55,416 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)] === [2023-09-01 02:56:55,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:55,417 INFO L85 PathProgramCache]: Analyzing trace with hash -310657047, now seen corresponding path program 5 times [2023-09-01 02:56:55,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:55,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773170585] [2023-09-01 02:56:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:55,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:55,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:55,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773170585] [2023-09-01 02:56:55,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773170585] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:55,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:55,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:56:55,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890582351] [2023-09-01 02:56:55,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:55,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:56:55,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:55,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:56:55,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:56:55,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-09-01 02:56:55,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 82 transitions, 771 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:55,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:55,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-09-01 02:56:55,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:57,171 INFO L130 PetriNetUnfolder]: 13240/18025 cut-off events. [2023-09-01 02:56:57,171 INFO L131 PetriNetUnfolder]: For 107966/113800 co-relation queries the response was YES. [2023-09-01 02:56:57,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87781 conditions, 18025 events. 13240/18025 cut-off events. For 107966/113800 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 101564 event pairs, 3579 based on Foata normal form. 3087/20892 useless extension candidates. Maximal degree in co-relation 87743. Up to 10187 conditions per place. [2023-09-01 02:56:57,288 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 198 selfloop transitions, 18 changer transitions 2/226 dead transitions. [2023-09-01 02:56:57,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 226 transitions, 2455 flow [2023-09-01 02:56:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:56:57,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:56:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 799 transitions. [2023-09-01 02:56:57,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2023-09-01 02:56:57,290 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 799 transitions. [2023-09-01 02:56:57,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 799 transitions. [2023-09-01 02:56:57,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:57,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 799 transitions. [2023-09-01 02:56:57,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.16666666666666) internal successors, (799), 6 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:57,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:57,295 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:57,295 INFO L175 Difference]: Start difference. First operand has 108 places, 82 transitions, 771 flow. Second operand 6 states and 799 transitions. [2023-09-01 02:56:57,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 226 transitions, 2455 flow [2023-09-01 02:56:57,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 226 transitions, 2377 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-09-01 02:56:57,635 INFO L231 Difference]: Finished difference. Result has 113 places, 86 transitions, 841 flow [2023-09-01 02:56:57,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=841, PETRI_PLACES=113, PETRI_TRANSITIONS=86} [2023-09-01 02:56:57,635 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2023-09-01 02:56:57,636 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 86 transitions, 841 flow [2023-09-01 02:56:57,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:57,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:57,636 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, 1, 1] [2023-09-01 02:56:57,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 02:56:57,637 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)] === [2023-09-01 02:56:57,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:57,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1902105510, now seen corresponding path program 2 times [2023-09-01 02:56:57,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:56:57,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144300863] [2023-09-01 02:56:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:57,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:56:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:57,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:56:57,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144300863] [2023-09-01 02:56:57,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144300863] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:56:57,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913618039] [2023-09-01 02:56:57,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:56:57,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:56:57,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:56:57,713 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:56:57,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 02:56:57,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:56:57,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:56:57,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:56:57,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:57,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:56:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:56:57,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913618039] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:56:57,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:56:57,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 02:56:57,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897568166] [2023-09-01 02:56:57,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:56:57,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:56:57,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:56:57,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:56:57,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:56:57,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-09-01 02:56:57,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 86 transitions, 841 flow. Second operand has 10 states, 10 states have (on average 120.3) internal successors, (1203), 10 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:57,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:57,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-09-01 02:56:57,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:59,806 INFO L130 PetriNetUnfolder]: 13852/18860 cut-off events. [2023-09-01 02:56:59,806 INFO L131 PetriNetUnfolder]: For 127015/133024 co-relation queries the response was YES. [2023-09-01 02:56:59,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97917 conditions, 18860 events. 13852/18860 cut-off events. For 127015/133024 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 105202 event pairs, 3847 based on Foata normal form. 3068/21698 useless extension candidates. Maximal degree in co-relation 97877. Up to 10375 conditions per place. [2023-09-01 02:56:59,927 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 165 selfloop transitions, 16 changer transitions 0/189 dead transitions. [2023-09-01 02:56:59,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 189 transitions, 2054 flow [2023-09-01 02:56:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:56:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:56:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 662 transitions. [2023-09-01 02:56:59,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48676470588235293 [2023-09-01 02:56:59,929 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 662 transitions. [2023-09-01 02:56:59,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 662 transitions. [2023-09-01 02:56:59,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:59,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 662 transitions. [2023-09-01 02:56:59,931 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) [2023-09-01 02:56:59,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:59,933 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:56:59,933 INFO L175 Difference]: Start difference. First operand has 113 places, 86 transitions, 841 flow. Second operand 5 states and 662 transitions. [2023-09-01 02:56:59,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 189 transitions, 2054 flow [2023-09-01 02:57:00,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 189 transitions, 1998 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-09-01 02:57:00,225 INFO L231 Difference]: Finished difference. Result has 115 places, 87 transitions, 838 flow [2023-09-01 02:57:00,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=838, PETRI_PLACES=115, PETRI_TRANSITIONS=87} [2023-09-01 02:57:00,226 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2023-09-01 02:57:00,226 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 87 transitions, 838 flow [2023-09-01 02:57:00,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.3) internal successors, (1203), 10 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:00,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:57:00,227 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, 1, 1] [2023-09-01 02:57:00,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-09-01 02:57:00,429 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,SelfDestructingSolverStorable23 [2023-09-01 02:57:00,429 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:57:00,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:57:00,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1172883442, now seen corresponding path program 3 times [2023-09-01 02:57:00,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:57:00,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673793763] [2023-09-01 02:57:00,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:57:00,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:57:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:57:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:00,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:57:00,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673793763] [2023-09-01 02:57:00,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673793763] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:57:00,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:57:00,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:57:00,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403514149] [2023-09-01 02:57:00,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:57:00,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:57:00,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:57:00,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:57:00,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:57:00,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-09-01 02:57:00,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 87 transitions, 838 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:00,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:57:00,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-09-01 02:57:00,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:57:02,354 INFO L130 PetriNetUnfolder]: 13170/17913 cut-off events. [2023-09-01 02:57:02,355 INFO L131 PetriNetUnfolder]: For 119316/125003 co-relation queries the response was YES. [2023-09-01 02:57:02,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92333 conditions, 17913 events. 13170/17913 cut-off events. For 119316/125003 co-relation queries the response was YES. Maximal size of possible extension queue 1010. Compared 99280 event pairs, 3661 based on Foata normal form. 3035/20701 useless extension candidates. Maximal degree in co-relation 92292. Up to 10316 conditions per place. [2023-09-01 02:57:02,482 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 181 selfloop transitions, 22 changer transitions 4/215 dead transitions. [2023-09-01 02:57:02,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 215 transitions, 2328 flow [2023-09-01 02:57:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:57:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:57:02,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 794 transitions. [2023-09-01 02:57:02,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48651960784313725 [2023-09-01 02:57:02,484 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 794 transitions. [2023-09-01 02:57:02,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 794 transitions. [2023-09-01 02:57:02,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:57:02,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 794 transitions. [2023-09-01 02:57:02,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 132.33333333333334) internal successors, (794), 6 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:02,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:02,488 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:02,488 INFO L175 Difference]: Start difference. First operand has 115 places, 87 transitions, 838 flow. Second operand 6 states and 794 transitions. [2023-09-01 02:57:02,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 215 transitions, 2328 flow [2023-09-01 02:57:03,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 215 transitions, 2300 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 02:57:03,122 INFO L231 Difference]: Finished difference. Result has 119 places, 90 transitions, 906 flow [2023-09-01 02:57:03,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=906, PETRI_PLACES=119, PETRI_TRANSITIONS=90} [2023-09-01 02:57:03,123 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2023-09-01 02:57:03,123 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 90 transitions, 906 flow [2023-09-01 02:57:03,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:03,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:57:03,123 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, 1, 1] [2023-09-01 02:57:03,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-09-01 02:57:03,124 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:57:03,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:57:03,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2063772676, now seen corresponding path program 4 times [2023-09-01 02:57:03,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:57:03,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155961926] [2023-09-01 02:57:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:57:03,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:57:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:57:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:03,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:57:03,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155961926] [2023-09-01 02:57:03,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155961926] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:57:03,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:57:03,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:57:03,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267074067] [2023-09-01 02:57:03,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:57:03,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:57:03,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:57:03,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:57:03,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:57:03,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-09-01 02:57:03,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 90 transitions, 906 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:03,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:57:03,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-09-01 02:57:03,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:57:04,885 INFO L130 PetriNetUnfolder]: 12426/16885 cut-off events. [2023-09-01 02:57:04,885 INFO L131 PetriNetUnfolder]: For 112368/117739 co-relation queries the response was YES. [2023-09-01 02:57:04,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88849 conditions, 16885 events. 12426/16885 cut-off events. For 112368/117739 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 92925 event pairs, 3035 based on Foata normal form. 2829/19475 useless extension candidates. Maximal degree in co-relation 88807. Up to 8582 conditions per place. [2023-09-01 02:57:05,002 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 160 selfloop transitions, 19 changer transitions 0/187 dead transitions. [2023-09-01 02:57:05,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 187 transitions, 2081 flow [2023-09-01 02:57:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:57:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:57:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 663 transitions. [2023-09-01 02:57:05,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2023-09-01 02:57:05,004 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 663 transitions. [2023-09-01 02:57:05,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 663 transitions. [2023-09-01 02:57:05,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:57:05,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 663 transitions. [2023-09-01 02:57:05,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.6) internal successors, (663), 5 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) [2023-09-01 02:57:05,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:05,007 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:05,008 INFO L175 Difference]: Start difference. First operand has 119 places, 90 transitions, 906 flow. Second operand 5 states and 663 transitions. [2023-09-01 02:57:05,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 187 transitions, 2081 flow [2023-09-01 02:57:05,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 187 transitions, 2025 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-09-01 02:57:05,473 INFO L231 Difference]: Finished difference. Result has 120 places, 91 transitions, 908 flow [2023-09-01 02:57:05,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=908, PETRI_PLACES=120, PETRI_TRANSITIONS=91} [2023-09-01 02:57:05,474 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2023-09-01 02:57:05,474 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 91 transitions, 908 flow [2023-09-01 02:57:05,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:05,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:57:05,474 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, 1, 1] [2023-09-01 02:57:05,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-09-01 02:57:05,474 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:57:05,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:57:05,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1551658481, now seen corresponding path program 3 times [2023-09-01 02:57:05,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:57:05,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968958290] [2023-09-01 02:57:05,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:57:05,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:57:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:57:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:05,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:57:05,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968958290] [2023-09-01 02:57:05,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968958290] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:57:05,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:57:05,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:57:05,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632733990] [2023-09-01 02:57:05,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:57:05,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:57:05,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:57:05,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:57:05,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:57:05,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-09-01 02:57:05,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 91 transitions, 908 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:05,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:57:05,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-09-01 02:57:05,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:57:07,323 INFO L130 PetriNetUnfolder]: 11084/15095 cut-off events. [2023-09-01 02:57:07,323 INFO L131 PetriNetUnfolder]: For 126197/133058 co-relation queries the response was YES. [2023-09-01 02:57:07,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78692 conditions, 15095 events. 11084/15095 cut-off events. For 126197/133058 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 84219 event pairs, 2467 based on Foata normal form. 2507/17319 useless extension candidates. Maximal degree in co-relation 78650. Up to 7838 conditions per place. [2023-09-01 02:57:07,404 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 192 selfloop transitions, 22 changer transitions 14/236 dead transitions. [2023-09-01 02:57:07,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 236 transitions, 2693 flow [2023-09-01 02:57:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:57:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:57:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 798 transitions. [2023-09-01 02:57:07,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4889705882352941 [2023-09-01 02:57:07,406 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 798 transitions. [2023-09-01 02:57:07,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 798 transitions. [2023-09-01 02:57:07,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:57:07,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 798 transitions. [2023-09-01 02:57:07,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:07,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:07,410 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:07,410 INFO L175 Difference]: Start difference. First operand has 120 places, 91 transitions, 908 flow. Second operand 6 states and 798 transitions. [2023-09-01 02:57:07,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 236 transitions, 2693 flow [2023-09-01 02:57:07,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 236 transitions, 2567 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-09-01 02:57:07,606 INFO L231 Difference]: Finished difference. Result has 123 places, 94 transitions, 961 flow [2023-09-01 02:57:07,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=961, PETRI_PLACES=123, PETRI_TRANSITIONS=94} [2023-09-01 02:57:07,607 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2023-09-01 02:57:07,607 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 94 transitions, 961 flow [2023-09-01 02:57:07,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:07,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:57:07,608 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, 1, 1] [2023-09-01 02:57:07,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-09-01 02:57:07,608 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:57:07,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:57:07,609 INFO L85 PathProgramCache]: Analyzing trace with hash 65376171, now seen corresponding path program 4 times [2023-09-01 02:57:07,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:57:07,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157884318] [2023-09-01 02:57:07,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:57:07,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:57:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:57:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:07,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:57:07,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157884318] [2023-09-01 02:57:07,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157884318] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:57:07,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:57:07,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:57:07,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631079283] [2023-09-01 02:57:07,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:57:07,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:57:07,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:57:07,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:57:07,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:57:07,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-09-01 02:57:07,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 94 transitions, 961 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:07,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:57:07,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-09-01 02:57:07,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:57:08,959 INFO L130 PetriNetUnfolder]: 10222/13921 cut-off events. [2023-09-01 02:57:08,960 INFO L131 PetriNetUnfolder]: For 115976/122508 co-relation queries the response was YES. [2023-09-01 02:57:09,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74098 conditions, 13921 events. 10222/13921 cut-off events. For 115976/122508 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 76684 event pairs, 2127 based on Foata normal form. 2256/15986 useless extension candidates. Maximal degree in co-relation 74055. Up to 6158 conditions per place. [2023-09-01 02:57:09,052 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 179 selfloop transitions, 19 changer transitions 0/206 dead transitions. [2023-09-01 02:57:09,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 206 transitions, 2319 flow [2023-09-01 02:57:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:57:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:57:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 667 transitions. [2023-09-01 02:57:09,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4904411764705882 [2023-09-01 02:57:09,054 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 667 transitions. [2023-09-01 02:57:09,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 667 transitions. [2023-09-01 02:57:09,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:57:09,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 667 transitions. [2023-09-01 02:57:09,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:09,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:09,058 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:09,058 INFO L175 Difference]: Start difference. First operand has 123 places, 94 transitions, 961 flow. Second operand 5 states and 667 transitions. [2023-09-01 02:57:09,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 206 transitions, 2319 flow [2023-09-01 02:57:09,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 206 transitions, 2263 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-09-01 02:57:09,392 INFO L231 Difference]: Finished difference. Result has 124 places, 95 transitions, 963 flow [2023-09-01 02:57:09,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=963, PETRI_PLACES=124, PETRI_TRANSITIONS=95} [2023-09-01 02:57:09,393 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2023-09-01 02:57:09,393 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 95 transitions, 963 flow [2023-09-01 02:57:09,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:09,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:57:09,394 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, 1, 1, 1] [2023-09-01 02:57:09,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-09-01 02:57:09,394 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:57:09,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:57:09,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1336498222, now seen corresponding path program 1 times [2023-09-01 02:57:09,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:57:09,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202660516] [2023-09-01 02:57:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:57:09,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:57:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:57:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:57:09,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:57:09,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202660516] [2023-09-01 02:57:09,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202660516] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:57:09,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:57:09,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:57:09,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179234093] [2023-09-01 02:57:09,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:57:09,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:57:09,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:57:09,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:57:09,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:57:09,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 272 [2023-09-01 02:57:09,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 95 transitions, 963 flow. Second operand has 3 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) [2023-09-01 02:57:09,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:57:09,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 272 [2023-09-01 02:57:09,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:57:10,231 INFO L130 PetriNetUnfolder]: 5924/8258 cut-off events. [2023-09-01 02:57:10,231 INFO L131 PetriNetUnfolder]: For 79346/86476 co-relation queries the response was YES. [2023-09-01 02:57:10,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42697 conditions, 8258 events. 5924/8258 cut-off events. For 79346/86476 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 46570 event pairs, 1960 based on Foata normal form. 2906/10953 useless extension candidates. Maximal degree in co-relation 42654. Up to 5607 conditions per place. [2023-09-01 02:57:10,296 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 81 selfloop transitions, 10 changer transitions 17/122 dead transitions. [2023-09-01 02:57:10,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 122 transitions, 1316 flow [2023-09-01 02:57:10,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:57:10,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:57:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-09-01 02:57:10,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2023-09-01 02:57:10,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-09-01 02:57:10,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-09-01 02:57:10,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:57:10,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-09-01 02:57:10,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:10,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:10,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:10,299 INFO L175 Difference]: Start difference. First operand has 124 places, 95 transitions, 963 flow. Second operand 3 states and 425 transitions. [2023-09-01 02:57:10,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 122 transitions, 1316 flow [2023-09-01 02:57:10,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 122 transitions, 1277 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 02:57:10,435 INFO L231 Difference]: Finished difference. Result has 124 places, 83 transitions, 839 flow [2023-09-01 02:57:10,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=839, PETRI_PLACES=124, PETRI_TRANSITIONS=83} [2023-09-01 02:57:10,436 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2023-09-01 02:57:10,436 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 83 transitions, 839 flow [2023-09-01 02:57:10,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-09-01 02:57:10,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:57:10,437 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, 1, 1, 1] [2023-09-01 02:57:10,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-09-01 02:57:10,437 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:57:10,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:57:10,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1701116707, now seen corresponding path program 1 times [2023-09-01 02:57:10,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:57:10,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349317470] [2023-09-01 02:57:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:57:10,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:57:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:57:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:10,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:57:10,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349317470] [2023-09-01 02:57:10,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349317470] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:57:10,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226236830] [2023-09-01 02:57:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:57:10,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:57:10,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:57:10,585 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:57:10,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 02:57:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:57:10,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:57:10,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:57:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:10,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:57:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:57:10,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226236830] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:57:10,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:57:10,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-09-01 02:57:10,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16717910] [2023-09-01 02:57:10,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:57:10,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:57:10,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:57:10,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:57:10,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:57:10,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 272 [2023-09-01 02:57:10,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 83 transitions, 839 flow. Second operand has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:10,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:57:10,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 272 [2023-09-01 02:57:10,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:57:12,328 INFO L130 PetriNetUnfolder]: 10954/14997 cut-off events. [2023-09-01 02:57:12,328 INFO L131 PetriNetUnfolder]: For 112708/122845 co-relation queries the response was YES. [2023-09-01 02:57:12,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72006 conditions, 14997 events. 10954/14997 cut-off events. For 112708/122845 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 82588 event pairs, 995 based on Foata normal form. 4322/19188 useless extension candidates. Maximal degree in co-relation 71962. Up to 7880 conditions per place. [2023-09-01 02:57:12,453 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 163 selfloop transitions, 83 changer transitions 5/265 dead transitions. [2023-09-01 02:57:12,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 265 transitions, 2665 flow [2023-09-01 02:57:12,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 02:57:12,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 02:57:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1003 transitions. [2023-09-01 02:57:12,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2023-09-01 02:57:12,455 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1003 transitions. [2023-09-01 02:57:12,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1003 transitions. [2023-09-01 02:57:12,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:57:12,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1003 transitions. [2023-09-01 02:57:12,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.28571428571428) internal successors, (1003), 7 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:12,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:12,460 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:12,460 INFO L175 Difference]: Start difference. First operand has 124 places, 83 transitions, 839 flow. Second operand 7 states and 1003 transitions. [2023-09-01 02:57:12,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 265 transitions, 2665 flow [2023-09-01 02:57:12,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 265 transitions, 2572 flow, removed 4 selfloop flow, removed 13 redundant places. [2023-09-01 02:57:12,718 INFO L231 Difference]: Finished difference. Result has 115 places, 150 transitions, 1781 flow [2023-09-01 02:57:12,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1781, PETRI_PLACES=115, PETRI_TRANSITIONS=150} [2023-09-01 02:57:12,718 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2023-09-01 02:57:12,718 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 150 transitions, 1781 flow [2023-09-01 02:57:12,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:12,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:57:12,719 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, 1, 1, 1] [2023-09-01 02:57:12,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 02:57:12,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:57:12,925 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:57:12,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:57:12,925 INFO L85 PathProgramCache]: Analyzing trace with hash -103981559, now seen corresponding path program 2 times [2023-09-01 02:57:12,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:57:12,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034268234] [2023-09-01 02:57:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:57:12,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:57:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:57:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:13,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:57:13,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034268234] [2023-09-01 02:57:13,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034268234] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:57:13,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488851957] [2023-09-01 02:57:13,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:57:13,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:57:13,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:57:13,061 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:57:13,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 02:57:13,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:57:13,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:57:13,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:57:13,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:57:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:13,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:57:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:13,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488851957] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:57:13,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:57:13,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-09-01 02:57:13,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167490264] [2023-09-01 02:57:13,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:57:13,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:57:13,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:57:13,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:57:13,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:57:13,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 272 [2023-09-01 02:57:13,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 150 transitions, 1781 flow. Second operand has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:13,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:57:13,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 272 [2023-09-01 02:57:13,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:57:15,425 INFO L130 PetriNetUnfolder]: 16250/22218 cut-off events. [2023-09-01 02:57:15,425 INFO L131 PetriNetUnfolder]: For 166390/179808 co-relation queries the response was YES. [2023-09-01 02:57:15,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113544 conditions, 22218 events. 16250/22218 cut-off events. For 166390/179808 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 128281 event pairs, 2811 based on Foata normal form. 4715/26791 useless extension candidates. Maximal degree in co-relation 113505. Up to 16099 conditions per place. [2023-09-01 02:57:15,619 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 235 selfloop transitions, 79 changer transitions 5/333 dead transitions. [2023-09-01 02:57:15,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 333 transitions, 3952 flow [2023-09-01 02:57:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 02:57:15,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 02:57:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 999 transitions. [2023-09-01 02:57:15,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246848739495799 [2023-09-01 02:57:15,620 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 999 transitions. [2023-09-01 02:57:15,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 999 transitions. [2023-09-01 02:57:15,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:57:15,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 999 transitions. [2023-09-01 02:57:15,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 142.71428571428572) internal successors, (999), 7 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:15,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:15,624 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:15,624 INFO L175 Difference]: Start difference. First operand has 115 places, 150 transitions, 1781 flow. Second operand 7 states and 999 transitions. [2023-09-01 02:57:15,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 333 transitions, 3952 flow [2023-09-01 02:57:16,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 333 transitions, 3752 flow, removed 100 selfloop flow, removed 0 redundant places. [2023-09-01 02:57:16,240 INFO L231 Difference]: Finished difference. Result has 124 places, 222 transitions, 2808 flow [2023-09-01 02:57:16,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2808, PETRI_PLACES=124, PETRI_TRANSITIONS=222} [2023-09-01 02:57:16,241 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2023-09-01 02:57:16,241 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 222 transitions, 2808 flow [2023-09-01 02:57:16,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:16,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:57:16,242 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, 1, 1, 1, 1] [2023-09-01 02:57:16,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 02:57:16,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-09-01 02:57:16,448 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:57:16,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:57:16,448 INFO L85 PathProgramCache]: Analyzing trace with hash -112611065, now seen corresponding path program 3 times [2023-09-01 02:57:16,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:57:16,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965843216] [2023-09-01 02:57:16,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:57:16,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:57:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:57:16,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:16,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:57:16,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965843216] [2023-09-01 02:57:16,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965843216] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:57:16,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347137682] [2023-09-01 02:57:16,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:57:16,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:57:16,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:57:16,541 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:57:16,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 02:57:16,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 02:57:16,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:57:16,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:57:16,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:57:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:16,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:57:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:16,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347137682] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:57:16,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:57:16,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-09-01 02:57:16,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548692494] [2023-09-01 02:57:16,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:57:16,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 02:57:16,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:57:16,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 02:57:16,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-09-01 02:57:16,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-09-01 02:57:16,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 222 transitions, 2808 flow. Second operand has 11 states, 11 states have (on average 120.9090909090909) internal successors, (1330), 11 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:16,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:57:16,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-09-01 02:57:16,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:57:20,289 INFO L130 PetriNetUnfolder]: 23989/32858 cut-off events. [2023-09-01 02:57:20,289 INFO L131 PetriNetUnfolder]: For 266213/283063 co-relation queries the response was YES. [2023-09-01 02:57:20,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170386 conditions, 32858 events. 23989/32858 cut-off events. For 266213/283063 co-relation queries the response was YES. Maximal size of possible extension queue 1741. Compared 197944 event pairs, 4756 based on Foata normal form. 5790/38560 useless extension candidates. Maximal degree in co-relation 170343. Up to 17582 conditions per place. [2023-09-01 02:57:20,694 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 426 selfloop transitions, 39 changer transitions 0/473 dead transitions. [2023-09-01 02:57:20,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 473 transitions, 6340 flow [2023-09-01 02:57:20,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 02:57:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 02:57:20,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 926 transitions. [2023-09-01 02:57:20,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48634453781512604 [2023-09-01 02:57:20,696 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 926 transitions. [2023-09-01 02:57:20,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 926 transitions. [2023-09-01 02:57:20,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:57:20,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 926 transitions. [2023-09-01 02:57:20,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.28571428571428) internal successors, (926), 7 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:20,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:20,699 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:20,700 INFO L175 Difference]: Start difference. First operand has 124 places, 222 transitions, 2808 flow. Second operand 7 states and 926 transitions. [2023-09-01 02:57:20,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 473 transitions, 6340 flow [2023-09-01 02:57:21,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 473 transitions, 5848 flow, removed 246 selfloop flow, removed 0 redundant places. [2023-09-01 02:57:21,849 INFO L231 Difference]: Finished difference. Result has 134 places, 245 transitions, 2882 flow [2023-09-01 02:57:21,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2882, PETRI_PLACES=134, PETRI_TRANSITIONS=245} [2023-09-01 02:57:21,850 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2023-09-01 02:57:21,850 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 245 transitions, 2882 flow [2023-09-01 02:57:21,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.9090909090909) internal successors, (1330), 11 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:21,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:57:21,850 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, 1, 1, 1, 1] [2023-09-01 02:57:21,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 02:57:22,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-09-01 02:57:22,051 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:57:22,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:57:22,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1052429063, now seen corresponding path program 4 times [2023-09-01 02:57:22,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:57:22,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555997570] [2023-09-01 02:57:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:57:22,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:57:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:57:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:22,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:57:22,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555997570] [2023-09-01 02:57:22,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555997570] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:57:22,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672975193] [2023-09-01 02:57:22,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:57:22,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:57:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:57:22,121 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:57:22,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 02:57:22,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:57:22,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:57:22,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:57:22,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:57:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:22,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:57:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:22,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672975193] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:57:22,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:57:22,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-09-01 02:57:22,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937528656] [2023-09-01 02:57:22,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:57:22,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 02:57:22,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:57:22,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 02:57:22,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-09-01 02:57:22,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-09-01 02:57:22,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 245 transitions, 2882 flow. Second operand has 11 states, 11 states have (on average 120.18181818181819) internal successors, (1322), 11 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:22,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:57:22,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-09-01 02:57:22,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:57:26,295 INFO L130 PetriNetUnfolder]: 24767/34055 cut-off events. [2023-09-01 02:57:26,295 INFO L131 PetriNetUnfolder]: For 294765/310653 co-relation queries the response was YES. [2023-09-01 02:57:26,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177769 conditions, 34055 events. 24767/34055 cut-off events. For 294765/310653 co-relation queries the response was YES. Maximal size of possible extension queue 1831. Compared 212440 event pairs, 4612 based on Foata normal form. 5623/39395 useless extension candidates. Maximal degree in co-relation 177721. Up to 16055 conditions per place. [2023-09-01 02:57:26,746 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 723 selfloop transitions, 54 changer transitions 34/819 dead transitions. [2023-09-01 02:57:26,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 819 transitions, 10837 flow [2023-09-01 02:57:26,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 02:57:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 02:57:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1435 transitions. [2023-09-01 02:57:26,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47961229946524064 [2023-09-01 02:57:26,748 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1435 transitions. [2023-09-01 02:57:26,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1435 transitions. [2023-09-01 02:57:26,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:57:26,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1435 transitions. [2023-09-01 02:57:26,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 130.45454545454547) internal successors, (1435), 11 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:26,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:26,753 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:26,753 INFO L175 Difference]: Start difference. First operand has 134 places, 245 transitions, 2882 flow. Second operand 11 states and 1435 transitions. [2023-09-01 02:57:26,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 819 transitions, 10837 flow [2023-09-01 02:57:28,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 819 transitions, 10768 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-09-01 02:57:28,560 INFO L231 Difference]: Finished difference. Result has 147 places, 273 transitions, 3323 flow [2023-09-01 02:57:28,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3323, PETRI_PLACES=147, PETRI_TRANSITIONS=273} [2023-09-01 02:57:28,561 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2023-09-01 02:57:28,561 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 273 transitions, 3323 flow [2023-09-01 02:57:28,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.18181818181819) internal successors, (1322), 11 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:28,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:57:28,562 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, 1, 1, 1, 1] [2023-09-01 02:57:28,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 02:57:28,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-09-01 02:57:28,762 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:57:28,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:57:28,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1799135425, now seen corresponding path program 5 times [2023-09-01 02:57:28,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:57:28,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385537138] [2023-09-01 02:57:28,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:57:28,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:57:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:57:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:28,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:57:28,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385537138] [2023-09-01 02:57:28,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385537138] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:57:28,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809894956] [2023-09-01 02:57:28,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:57:28,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:57:28,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:57:28,835 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:57:28,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 02:57:28,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 02:57:28,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:57:28,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:57:28,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:57:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:29,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:57:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:29,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809894956] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:57:29,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:57:29,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 02:57:29,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932988522] [2023-09-01 02:57:29,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:57:29,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:57:29,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:57:29,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:57:29,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:57:29,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-09-01 02:57:29,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 273 transitions, 3323 flow. Second operand has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:29,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:57:29,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-09-01 02:57:29,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:57:37,636 INFO L130 PetriNetUnfolder]: 44809/61566 cut-off events. [2023-09-01 02:57:37,636 INFO L131 PetriNetUnfolder]: For 514484/543802 co-relation queries the response was YES. [2023-09-01 02:57:38,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330312 conditions, 61566 events. 44809/61566 cut-off events. For 514484/543802 co-relation queries the response was YES. Maximal size of possible extension queue 3012. Compared 401937 event pairs, 11114 based on Foata normal form. 10735/72048 useless extension candidates. Maximal degree in co-relation 330259. Up to 23133 conditions per place. [2023-09-01 02:57:38,306 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 744 selfloop transitions, 152 changer transitions 0/904 dead transitions. [2023-09-01 02:57:38,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 904 transitions, 11646 flow [2023-09-01 02:57:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 02:57:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 02:57:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1719 transitions. [2023-09-01 02:57:38,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861425339366516 [2023-09-01 02:57:38,309 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1719 transitions. [2023-09-01 02:57:38,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1719 transitions. [2023-09-01 02:57:38,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:57:38,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1719 transitions. [2023-09-01 02:57:38,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 132.23076923076923) internal successors, (1719), 13 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:38,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 272.0) internal successors, (3808), 14 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:38,313 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 272.0) internal successors, (3808), 14 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:38,313 INFO L175 Difference]: Start difference. First operand has 147 places, 273 transitions, 3323 flow. Second operand 13 states and 1719 transitions. [2023-09-01 02:57:38,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 904 transitions, 11646 flow [2023-09-01 02:57:41,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 904 transitions, 11409 flow, removed 79 selfloop flow, removed 1 redundant places. [2023-09-01 02:57:41,565 INFO L231 Difference]: Finished difference. Result has 165 places, 372 transitions, 4792 flow [2023-09-01 02:57:41,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4792, PETRI_PLACES=165, PETRI_TRANSITIONS=372} [2023-09-01 02:57:41,566 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2023-09-01 02:57:41,566 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 372 transitions, 4792 flow [2023-09-01 02:57:41,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:41,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:57:41,567 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, 1, 1, 1, 1] [2023-09-01 02:57:41,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 02:57:41,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-09-01 02:57:41,769 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:57:41,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:57:41,769 INFO L85 PathProgramCache]: Analyzing trace with hash 59740837, now seen corresponding path program 6 times [2023-09-01 02:57:41,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:57:41,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560883685] [2023-09-01 02:57:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:57:41,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:57:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:57:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:41,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:57:41,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560883685] [2023-09-01 02:57:41,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560883685] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:57:41,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152503498] [2023-09-01 02:57:41,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 02:57:41,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:57:41,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:57:41,854 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:57:41,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 02:57:41,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 02:57:41,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:57:41,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:57:41,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:57:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:42,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:57:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:57:42,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152503498] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:57:42,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:57:42,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-09-01 02:57:42,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306440265] [2023-09-01 02:57:42,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:57:42,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 02:57:42,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:57:42,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 02:57:42,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-09-01 02:57:42,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-09-01 02:57:42,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 372 transitions, 4792 flow. Second operand has 13 states, 13 states have (on average 120.46153846153847) internal successors, (1566), 13 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:42,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:57:42,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-09-01 02:57:42,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:57:53,076 INFO L130 PetriNetUnfolder]: 54669/74716 cut-off events. [2023-09-01 02:57:53,077 INFO L131 PetriNetUnfolder]: For 747241/782376 co-relation queries the response was YES. [2023-09-01 02:57:53,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430795 conditions, 74716 events. 54669/74716 cut-off events. For 747241/782376 co-relation queries the response was YES. Maximal size of possible extension queue 3505. Compared 493004 event pairs, 12065 based on Foata normal form. 14110/88664 useless extension candidates. Maximal degree in co-relation 430734. Up to 56939 conditions per place. [2023-09-01 02:57:54,334 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 693 selfloop transitions, 103 changer transitions 0/804 dead transitions. [2023-09-01 02:57:54,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 804 transitions, 11137 flow [2023-09-01 02:57:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 02:57:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 02:57:54,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1442 transitions. [2023-09-01 02:57:54,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.481951871657754 [2023-09-01 02:57:54,336 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1442 transitions. [2023-09-01 02:57:54,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1442 transitions. [2023-09-01 02:57:54,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:57:54,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1442 transitions. [2023-09-01 02:57:54,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 131.0909090909091) internal successors, (1442), 11 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:54,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:54,340 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:57:54,340 INFO L175 Difference]: Start difference. First operand has 165 places, 372 transitions, 4792 flow. Second operand 11 states and 1442 transitions. [2023-09-01 02:57:54,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 804 transitions, 11137 flow [2023-09-01 02:58:00,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 804 transitions, 10827 flow, removed 86 selfloop flow, removed 5 redundant places. [2023-09-01 02:58:00,530 INFO L231 Difference]: Finished difference. Result has 175 places, 427 transitions, 5572 flow [2023-09-01 02:58:00,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=4517, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5572, PETRI_PLACES=175, PETRI_TRANSITIONS=427} [2023-09-01 02:58:00,530 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2023-09-01 02:58:00,531 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 427 transitions, 5572 flow [2023-09-01 02:58:00,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 120.46153846153847) internal successors, (1566), 13 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:00,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:00,531 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, 1, 1, 1, 1] [2023-09-01 02:58:00,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:00,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:00,737 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:58:00,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:00,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1959135719, now seen corresponding path program 7 times [2023-09-01 02:58:00,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:00,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098269656] [2023-09-01 02:58:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:00,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:00,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:00,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098269656] [2023-09-01 02:58:00,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098269656] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:00,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055962942] [2023-09-01 02:58:00,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 02:58:00,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:00,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:00,808 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:58:00,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 02:58:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:00,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:58:00,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:00,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:01,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055962942] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:01,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:01,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 02:58:01,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516836230] [2023-09-01 02:58:01,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:01,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:58:01,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:01,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:58:01,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:58:01,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-09-01 02:58:01,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 427 transitions, 5572 flow. Second operand has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:01,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:01,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-09-01 02:58:01,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:14,213 INFO L130 PetriNetUnfolder]: 60833/84211 cut-off events. [2023-09-01 02:58:14,213 INFO L131 PetriNetUnfolder]: For 1028343/1068291 co-relation queries the response was YES. [2023-09-01 02:58:15,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518771 conditions, 84211 events. 60833/84211 cut-off events. For 1028343/1068291 co-relation queries the response was YES. Maximal size of possible extension queue 4103. Compared 586961 event pairs, 10753 based on Foata normal form. 15118/99048 useless extension candidates. Maximal degree in co-relation 518706. Up to 29509 conditions per place. [2023-09-01 02:58:15,333 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 1289 selfloop transitions, 171 changer transitions 13/1481 dead transitions. [2023-09-01 02:58:15,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1481 transitions, 20392 flow [2023-09-01 02:58:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 02:58:15,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 02:58:15,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2356 transitions. [2023-09-01 02:58:15,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4812091503267974 [2023-09-01 02:58:15,336 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2356 transitions. [2023-09-01 02:58:15,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2356 transitions. [2023-09-01 02:58:15,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:15,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2356 transitions. [2023-09-01 02:58:15,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 130.88888888888889) internal successors, (2356), 18 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:15,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:15,342 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:15,342 INFO L175 Difference]: Start difference. First operand has 175 places, 427 transitions, 5572 flow. Second operand 18 states and 2356 transitions. [2023-09-01 02:58:15,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1481 transitions, 20392 flow [2023-09-01 02:58:24,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 1481 transitions, 19956 flow, removed 205 selfloop flow, removed 2 redundant places. [2023-09-01 02:58:24,457 INFO L231 Difference]: Finished difference. Result has 196 places, 492 transitions, 6457 flow [2023-09-01 02:58:24,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=5162, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6457, PETRI_PLACES=196, PETRI_TRANSITIONS=492} [2023-09-01 02:58:24,458 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 141 predicate places. [2023-09-01 02:58:24,458 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 492 transitions, 6457 flow [2023-09-01 02:58:24,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:24,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:24,458 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, 1, 1, 1, 1] [2023-09-01 02:58:24,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-09-01 02:58:24,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:24,659 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:58:24,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1199667839, now seen corresponding path program 8 times [2023-09-01 02:58:24,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:24,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91723519] [2023-09-01 02:58:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:24,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:24,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:24,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91723519] [2023-09-01 02:58:24,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91723519] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:24,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897630417] [2023-09-01 02:58:24,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:58:24,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:24,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:24,737 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:58:24,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 02:58:24,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:58:24,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:24,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:58:24,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:24,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:24,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897630417] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:24,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:24,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-09-01 02:58:24,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267869880] [2023-09-01 02:58:24,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:24,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 02:58:24,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:24,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 02:58:24,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-09-01 02:58:25,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-09-01 02:58:25,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 492 transitions, 6457 flow. Second operand has 13 states, 13 states have (on average 120.3076923076923) internal successors, (1564), 13 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:25,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:25,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-09-01 02:58:25,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:58:38,721 INFO L130 PetriNetUnfolder]: 59569/82514 cut-off events. [2023-09-01 02:58:38,722 INFO L131 PetriNetUnfolder]: For 1073927/1111618 co-relation queries the response was YES. [2023-09-01 02:58:39,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516061 conditions, 82514 events. 59569/82514 cut-off events. For 1073927/1111618 co-relation queries the response was YES. Maximal size of possible extension queue 3980. Compared 573406 event pairs, 12149 based on Foata normal form. 13792/95896 useless extension candidates. Maximal degree in co-relation 515989. Up to 40319 conditions per place. [2023-09-01 02:58:40,204 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 1093 selfloop transitions, 156 changer transitions 52/1309 dead transitions. [2023-09-01 02:58:40,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1309 transitions, 18142 flow [2023-09-01 02:58:40,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 02:58:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 02:58:40,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2345 transitions. [2023-09-01 02:58:40,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789624183006536 [2023-09-01 02:58:40,206 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2345 transitions. [2023-09-01 02:58:40,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2345 transitions. [2023-09-01 02:58:40,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:58:40,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2345 transitions. [2023-09-01 02:58:40,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 130.27777777777777) internal successors, (2345), 18 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:40,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:40,212 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:40,212 INFO L175 Difference]: Start difference. First operand has 196 places, 492 transitions, 6457 flow. Second operand 18 states and 2345 transitions. [2023-09-01 02:58:40,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 1309 transitions, 18142 flow [2023-09-01 02:58:51,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 1309 transitions, 17886 flow, removed 75 selfloop flow, removed 6 redundant places. [2023-09-01 02:58:51,865 INFO L231 Difference]: Finished difference. Result has 209 places, 497 transitions, 6629 flow [2023-09-01 02:58:51,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=6205, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6629, PETRI_PLACES=209, PETRI_TRANSITIONS=497} [2023-09-01 02:58:51,866 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 154 predicate places. [2023-09-01 02:58:51,866 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 497 transitions, 6629 flow [2023-09-01 02:58:51,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 120.3076923076923) internal successors, (1564), 13 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:51,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:58:51,866 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, 1, 1, 1, 1] [2023-09-01 02:58:51,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 02:58:52,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-09-01 02:58:52,067 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 02:58:52,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:58:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1817606293, now seen corresponding path program 9 times [2023-09-01 02:58:52,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:58:52,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959189309] [2023-09-01 02:58:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:58:52,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:58:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:58:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:52,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:58:52,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959189309] [2023-09-01 02:58:52,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959189309] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:58:52,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319812882] [2023-09-01 02:58:52,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:58:52,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:58:52,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:58:52,140 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:58:52,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 02:58:52,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 02:58:52,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:58:52,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:58:52,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:58:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:52,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:58:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:58:52,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319812882] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:58:52,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:58:52,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 02:58:52,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608904888] [2023-09-01 02:58:52,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:58:52,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:58:52,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:58:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:58:52,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:58:52,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-09-01 02:58:52,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 497 transitions, 6629 flow. Second operand has 12 states, 12 states have (on average 120.5) internal successors, (1446), 12 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:58:52,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:58:52,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-09-01 02:58:52,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand