./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/fibonacci.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/fibonacci.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 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e --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 01:58:44,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:58:44,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:58:44,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:58:44,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:58:44,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:58:44,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:58:44,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:58:44,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:58:44,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:58:44,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:58:44,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:58:44,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:58:44,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:58:44,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:58:44,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:58:44,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:58:44,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:58:44,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:58:44,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:58:44,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:58:44,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:58:44,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:58:44,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:58:44,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:58:44,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:58:44,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:58:44,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:58:44,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:58:44,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:58:44,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:58:44,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:58:44,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:58:44,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:58:44,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:58:44,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:58:44,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:58:44,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:58:44,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:58:44,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:58:44,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:58:44,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:58:44,544 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:58:44,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:58:44,545 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:58:44,545 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:58:44,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:58:44,546 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:58:44,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:58:44,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:58:44,547 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:58:44,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:58:44,548 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:58:44,549 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:58:44,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:58:44,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:58:44,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:58:44,549 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:58:44,550 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:58:44,550 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:58:44,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:58:44,550 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:58:44,550 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:58:44,551 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:58:44,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:58:44,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:58:44,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:58:44,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:58:44,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:58:44,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:58:44,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:58:44,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:58:44,552 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:58:44,553 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:58:44,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:58:44,553 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:58:44,553 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:58:44,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:58:44,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:58:44,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:58:44,916 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:58:44,917 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:58:44,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-09-01 01:58:45,985 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:58:46,195 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:58:46,196 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-09-01 01:58:46,203 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d508a918/91ae85b9f1ac4ae6a89d23d7e78ddddb/FLAG333a4c8d3 [2023-09-01 01:58:46,219 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d508a918/91ae85b9f1ac4ae6a89d23d7e78ddddb [2023-09-01 01:58:46,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:58:46,222 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:58:46,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:58:46,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:58:46,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:58:46,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:58:46" (1/1) ... [2023-09-01 01:58:46,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b398bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:58:46, skipping insertion in model container [2023-09-01 01:58:46,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:58:46" (1/1) ... [2023-09-01 01:58:46,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:58:46,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:58:46,431 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/fibonacci.wvr.c[2330,2343] [2023-09-01 01:58:46,444 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:58:46,455 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:58:46,491 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/fibonacci.wvr.c[2330,2343] [2023-09-01 01:58:46,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:58:46,511 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:58:46,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:58:46 WrapperNode [2023-09-01 01:58:46,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:58:46,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:58:46,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:58:46,513 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:58:46,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:58:46" (1/1) ... [2023-09-01 01:58:46,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:58:46" (1/1) ... [2023-09-01 01:58:46,567 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 169 [2023-09-01 01:58:46,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:58:46,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:58:46,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:58:46,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:58:46,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:58:46" (1/1) ... [2023-09-01 01:58:46,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:58:46" (1/1) ... [2023-09-01 01:58:46,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:58:46" (1/1) ... [2023-09-01 01:58:46,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:58:46" (1/1) ... [2023-09-01 01:58:46,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:58:46" (1/1) ... [2023-09-01 01:58:46,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:58:46" (1/1) ... [2023-09-01 01:58:46,611 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:58:46" (1/1) ... [2023-09-01 01:58:46,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:58:46" (1/1) ... [2023-09-01 01:58:46,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:58:46,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:58:46,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:58:46,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:58:46,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:58:46" (1/1) ... [2023-09-01 01:58:46,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:58:46,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:58:46,654 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 01:58:46,678 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 01:58:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:58:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:58:46,697 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:58:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:58:46,698 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:58:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 01:58:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:58:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 01:58:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:58:46,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:58:46,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 01:58:46,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:58:46,700 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 01:58:46,815 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:58:46,817 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:58:47,166 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:58:47,179 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:58:47,182 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 01:58:47,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:58:47 BoogieIcfgContainer [2023-09-01 01:58:47,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:58:47,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:58:47,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:58:47,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:58:47,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:58:46" (1/3) ... [2023-09-01 01:58:47,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e9c7aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:58:47, skipping insertion in model container [2023-09-01 01:58:47,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:58:46" (2/3) ... [2023-09-01 01:58:47,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e9c7aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:58:47, skipping insertion in model container [2023-09-01 01:58:47,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:58:47" (3/3) ... [2023-09-01 01:58:47,195 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2023-09-01 01:58:47,210 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:58:47,211 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 01:58:47,211 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:58:47,374 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 01:58:47,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 208 transitions, 432 flow [2023-09-01 01:58:47,536 INFO L130 PetriNetUnfolder]: 14/206 cut-off events. [2023-09-01 01:58:47,538 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:58:47,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 206 events. 14/206 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 351 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2023-09-01 01:58:47,546 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 208 transitions, 432 flow [2023-09-01 01:58:47,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 202 transitions, 416 flow [2023-09-01 01:58:47,558 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:58:47,570 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 202 transitions, 416 flow [2023-09-01 01:58:47,573 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 202 transitions, 416 flow [2023-09-01 01:58:47,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 202 transitions, 416 flow [2023-09-01 01:58:47,627 INFO L130 PetriNetUnfolder]: 14/202 cut-off events. [2023-09-01 01:58:47,627 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:58:47,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 202 events. 14/202 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 330 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2023-09-01 01:58:47,640 INFO L119 LiptonReduction]: Number of co-enabled transitions 8316 [2023-09-01 01:58:53,988 INFO L134 LiptonReduction]: Checked pairs total: 7464 [2023-09-01 01:58:53,989 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-09-01 01:58:54,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:58:54,006 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;@a797c70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:58:54,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-09-01 01:58:54,007 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-09-01 01:58:54,008 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:58:54,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:54,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 01:58:54,009 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:54,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:54,013 INFO L85 PathProgramCache]: Analyzing trace with hash 849, now seen corresponding path program 1 times [2023-09-01 01:58:54,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:54,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901862666] [2023-09-01 01:58:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:54,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:54,096 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 01:58:54,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:54,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901862666] [2023-09-01 01:58:54,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901862666] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:58:54,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:58:54,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 01:58:54,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157516695] [2023-09-01 01:58:54,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:58:54,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 01:58:54,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:54,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 01:58:54,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 01:58:54,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 438 [2023-09-01 01:58:54,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 191.5) internal successors, (383), 2 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:54,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 438 [2023-09-01 01:58:54,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:54,192 INFO L130 PetriNetUnfolder]: 106/169 cut-off events. [2023-09-01 01:58:54,193 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 01:58:54,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 169 events. 106/169 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 548 event pairs, 45 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 277. Up to 167 conditions per place. [2023-09-01 01:58:54,195 INFO L137 encePairwiseOnDemand]: 435/438 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-09-01 01:58:54,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-09-01 01:58:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 01:58:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 01:58:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 404 transitions. [2023-09-01 01:58:54,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611872146118721 [2023-09-01 01:58:54,221 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 404 transitions. [2023-09-01 01:58:54,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 404 transitions. [2023-09-01 01:58:54,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:54,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 404 transitions. [2023-09-01 01:58:54,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 202.0) internal successors, (404), 2 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,232 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,234 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 404 transitions. [2023-09-01 01:58:54,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-09-01 01:58:54,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:58:54,237 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-09-01 01:58:54,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-09-01 01:58:54,242 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-09-01 01:58:54,242 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-09-01 01:58:54,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 191.5) internal successors, (383), 2 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:54,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:58:54,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 01:58:54,243 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:54,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:54,244 INFO L85 PathProgramCache]: Analyzing trace with hash 835753, now seen corresponding path program 1 times [2023-09-01 01:58:54,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:54,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266822266] [2023-09-01 01:58:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:54,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:54,423 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 01:58:54,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:54,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266822266] [2023-09-01 01:58:54,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266822266] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:58:54,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:58:54,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:58:54,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747725608] [2023-09-01 01:58:54,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:58:54,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:58:54,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:54,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:58:54,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:58:54,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 438 [2023-09-01 01:58:54,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:54,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 438 [2023-09-01 01:58:54,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:54,522 INFO L130 PetriNetUnfolder]: 99/156 cut-off events. [2023-09-01 01:58:54,523 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 01:58:54,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 156 events. 99/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 491 event pairs, 42 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 313. Up to 153 conditions per place. [2023-09-01 01:58:54,524 INFO L137 encePairwiseOnDemand]: 435/438 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-09-01 01:58:54,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-09-01 01:58:54,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:58:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:58:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2023-09-01 01:58:54,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299847792998478 [2023-09-01 01:58:54,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2023-09-01 01:58:54,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2023-09-01 01:58:54,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:54,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2023-09-01 01:58:54,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,534 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 565 transitions. [2023-09-01 01:58:54,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-09-01 01:58:54,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 01:58:54,535 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-09-01 01:58:54,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-09-01 01:58:54,536 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-09-01 01:58:54,536 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-09-01 01:58:54,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:54,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:58:54,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 01:58:54,538 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:54,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:54,538 INFO L85 PathProgramCache]: Analyzing trace with hash 835754, now seen corresponding path program 1 times [2023-09-01 01:58:54,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:54,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138639299] [2023-09-01 01:58:54,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:54,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:54,629 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 01:58:54,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:54,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138639299] [2023-09-01 01:58:54,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138639299] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:58:54,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:58:54,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:58:54,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202948813] [2023-09-01 01:58:54,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:58:54,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:58:54,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:54,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:58:54,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:58:54,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 438 [2023-09-01 01:58:54,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:54,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 438 [2023-09-01 01:58:54,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:54,693 INFO L130 PetriNetUnfolder]: 92/143 cut-off events. [2023-09-01 01:58:54,693 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 01:58:54,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 143 events. 92/143 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 425 event pairs, 39 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 288. Up to 140 conditions per place. [2023-09-01 01:58:54,695 INFO L137 encePairwiseOnDemand]: 435/438 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-09-01 01:58:54,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-09-01 01:58:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:58:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:58:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2023-09-01 01:58:54,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375951293759513 [2023-09-01 01:58:54,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2023-09-01 01:58:54,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2023-09-01 01:58:54,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:54,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2023-09-01 01:58:54,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,703 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 575 transitions. [2023-09-01 01:58:54,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-09-01 01:58:54,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:58:54,704 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-09-01 01:58:54,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-09-01 01:58:54,705 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-09-01 01:58:54,705 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-09-01 01:58:54,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:54,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:58:54,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 01:58:54,706 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:54,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:54,707 INFO L85 PathProgramCache]: Analyzing trace with hash 803179486, now seen corresponding path program 1 times [2023-09-01 01:58:54,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:54,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072930026] [2023-09-01 01:58:54,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:54,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:54,863 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 01:58:54,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:54,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072930026] [2023-09-01 01:58:54,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072930026] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:58:54,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:58:54,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:58:54,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431163251] [2023-09-01 01:58:54,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:58:54,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:58:54,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:54,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:58:54,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:58:54,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 438 [2023-09-01 01:58:54,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 185.25) internal successors, (741), 4 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:54,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 438 [2023-09-01 01:58:54,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:54,966 INFO L130 PetriNetUnfolder]: 70/112 cut-off events. [2023-09-01 01:58:54,966 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 01:58:54,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 112 events. 70/112 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 306 event pairs, 29 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 227. Up to 109 conditions per place. [2023-09-01 01:58:54,968 INFO L137 encePairwiseOnDemand]: 436/438 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-09-01 01:58:54,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-09-01 01:58:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:58:54,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:58:54,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2023-09-01 01:58:54,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315068493150685 [2023-09-01 01:58:54,972 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2023-09-01 01:58:54,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2023-09-01 01:58:54,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:54,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2023-09-01 01:58:54,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,982 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 567 transitions. [2023-09-01 01:58:54,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-09-01 01:58:54,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:58:54,983 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-09-01 01:58:54,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-09-01 01:58:54,984 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-09-01 01:58:54,985 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-09-01 01:58:54,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.25) internal successors, (741), 4 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:54,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:54,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:58:54,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 01:58:54,986 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:54,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:54,987 INFO L85 PathProgramCache]: Analyzing trace with hash 803179485, now seen corresponding path program 1 times [2023-09-01 01:58:54,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:54,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219449424] [2023-09-01 01:58:54,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:54,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:55,075 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 01:58:55,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:55,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219449424] [2023-09-01 01:58:55,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219449424] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:58:55,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:58:55,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:58:55,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814213685] [2023-09-01 01:58:55,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:58:55,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:58:55,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:55,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:58:55,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:58:55,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 438 [2023-09-01 01:58:55,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:55,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:55,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 438 [2023-09-01 01:58:55,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:55,164 INFO L130 PetriNetUnfolder]: 48/81 cut-off events. [2023-09-01 01:58:55,165 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 01:58:55,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 81 events. 48/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 186 event pairs, 19 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 166. Up to 78 conditions per place. [2023-09-01 01:58:55,166 INFO L137 encePairwiseOnDemand]: 436/438 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-09-01 01:58:55,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-09-01 01:58:55,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:58:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:58:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-09-01 01:58:55,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170471841704718 [2023-09-01 01:58:55,168 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-09-01 01:58:55,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-09-01 01:58:55,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:55,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-09-01 01:58:55,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:55,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:55,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:55,174 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 548 transitions. [2023-09-01 01:58:55,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-09-01 01:58:55,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:58:55,176 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-09-01 01:58:55,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-09-01 01:58:55,179 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-09-01 01:58:55,179 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-09-01 01:58:55,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:55,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:55,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:55,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 01:58:55,180 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:55,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:55,181 INFO L85 PathProgramCache]: Analyzing trace with hash 2033414492, now seen corresponding path program 1 times [2023-09-01 01:58:55,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:55,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048041746] [2023-09-01 01:58:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:55,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:55,443 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 01:58:55,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:55,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048041746] [2023-09-01 01:58:55,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048041746] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:58:55,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:58:55,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:58:55,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983819821] [2023-09-01 01:58:55,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:58:55,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:58:55,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:55,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:58:55,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:58:55,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 438 [2023-09-01 01:58:55,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:55,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:55,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 438 [2023-09-01 01:58:55,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:55,588 INFO L130 PetriNetUnfolder]: 64/118 cut-off events. [2023-09-01 01:58:55,588 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:58:55,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 118 events. 64/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 332 event pairs, 1 based on Foata normal form. 1/79 useless extension candidates. Maximal degree in co-relation 243. Up to 85 conditions per place. [2023-09-01 01:58:55,589 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 23 selfloop transitions, 5 changer transitions 5/35 dead transitions. [2023-09-01 01:58:55,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 35 transitions, 151 flow [2023-09-01 01:58:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:58:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:58:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 929 transitions. [2023-09-01 01:58:55,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42420091324200915 [2023-09-01 01:58:55,592 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 929 transitions. [2023-09-01 01:58:55,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 929 transitions. [2023-09-01 01:58:55,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:55,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 929 transitions. [2023-09-01 01:58:55,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.8) internal successors, (929), 5 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:55,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:55,599 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:55,599 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 5 states and 929 transitions. [2023-09-01 01:58:55,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 35 transitions, 151 flow [2023-09-01 01:58:55,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 35 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:58:55,601 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 72 flow [2023-09-01 01:58:55,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-09-01 01:58:55,602 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-09-01 01:58:55,602 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 72 flow [2023-09-01 01:58:55,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:55,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:55,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:55,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 01:58:55,603 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:55,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:55,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1250727870, now seen corresponding path program 2 times [2023-09-01 01:58:55,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:55,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669366088] [2023-09-01 01:58:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:55,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:55,808 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 01:58:55,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:55,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669366088] [2023-09-01 01:58:55,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669366088] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:58:55,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:58:55,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:58:55,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287930018] [2023-09-01 01:58:55,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:58:55,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:58:55,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:55,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:58:55,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:58:55,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 438 [2023-09-01 01:58:55,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:55,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:55,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 438 [2023-09-01 01:58:55,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:55,952 INFO L130 PetriNetUnfolder]: 61/110 cut-off events. [2023-09-01 01:58:55,952 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-09-01 01:58:55,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 110 events. 61/110 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 286 event pairs, 7 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 318. Up to 85 conditions per place. [2023-09-01 01:58:55,953 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 19 selfloop transitions, 6 changer transitions 5/32 dead transitions. [2023-09-01 01:58:55,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 171 flow [2023-09-01 01:58:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:58:55,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:58:55,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 925 transitions. [2023-09-01 01:58:55,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223744292237443 [2023-09-01 01:58:55,957 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 925 transitions. [2023-09-01 01:58:55,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 925 transitions. [2023-09-01 01:58:55,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:55,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 925 transitions. [2023-09-01 01:58:55,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:55,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:55,965 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:55,965 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 72 flow. Second operand 5 states and 925 transitions. [2023-09-01 01:58:55,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 171 flow [2023-09-01 01:58:55,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 169 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 01:58:55,968 INFO L231 Difference]: Finished difference. Result has 33 places, 21 transitions, 104 flow [2023-09-01 01:58:55,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=33, PETRI_TRANSITIONS=21} [2023-09-01 01:58:55,969 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2023-09-01 01:58:55,969 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 21 transitions, 104 flow [2023-09-01 01:58:55,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:55,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:55,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:55,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 01:58:55,972 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:55,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:55,973 INFO L85 PathProgramCache]: Analyzing trace with hash -354825092, now seen corresponding path program 1 times [2023-09-01 01:58:55,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:55,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557306271] [2023-09-01 01:58:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:55,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:56,032 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 01:58:56,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:56,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557306271] [2023-09-01 01:58:56,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557306271] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:58:56,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082505821] [2023-09-01 01:58:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:56,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:56,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:58:56,038 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 01:58:56,076 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 01:58:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:56,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 01:58:56,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:58:56,240 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 01:58:56,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:58:56,282 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 01:58:56,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082505821] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:58:56,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:58:56,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 01:58:56,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645195239] [2023-09-01 01:58:56,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:58:56,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 01:58:56,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:56,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 01:58:56,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 01:58:56,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:58:56,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 21 transitions, 104 flow. Second operand has 8 states, 8 states have (on average 183.875) internal successors, (1471), 8 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:56,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:56,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:58:56,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:56,447 INFO L130 PetriNetUnfolder]: 93/168 cut-off events. [2023-09-01 01:58:56,447 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-09-01 01:58:56,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 168 events. 93/168 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 499 event pairs, 12 based on Foata normal form. 6/160 useless extension candidates. Maximal degree in co-relation 520. Up to 71 conditions per place. [2023-09-01 01:58:56,450 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 41 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2023-09-01 01:58:56,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 291 flow [2023-09-01 01:58:56,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:58:56,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:58:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 945 transitions. [2023-09-01 01:58:56,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315068493150685 [2023-09-01 01:58:56,453 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 945 transitions. [2023-09-01 01:58:56,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 945 transitions. [2023-09-01 01:58:56,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:56,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 945 transitions. [2023-09-01 01:58:56,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:56,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:56,460 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:56,460 INFO L175 Difference]: Start difference. First operand has 33 places, 21 transitions, 104 flow. Second operand 5 states and 945 transitions. [2023-09-01 01:58:56,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 291 flow [2023-09-01 01:58:56,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 47 transitions, 275 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 01:58:56,463 INFO L231 Difference]: Finished difference. Result has 37 places, 24 transitions, 136 flow [2023-09-01 01:58:56,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=37, PETRI_TRANSITIONS=24} [2023-09-01 01:58:56,464 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-09-01 01:58:56,464 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 24 transitions, 136 flow [2023-09-01 01:58:56,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 183.875) internal successors, (1471), 8 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:56,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:56,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:56,475 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 01:58:56,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:56,672 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:56,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:56,673 INFO L85 PathProgramCache]: Analyzing trace with hash 562130681, now seen corresponding path program 1 times [2023-09-01 01:58:56,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:56,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948593867] [2023-09-01 01:58:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:56,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:56,738 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 01:58:56,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:56,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948593867] [2023-09-01 01:58:56,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948593867] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:58:56,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:58:56,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:58:56,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654469938] [2023-09-01 01:58:56,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:58:56,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:58:56,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:56,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:58:56,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:58:56,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 438 [2023-09-01 01:58:56,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 24 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:56,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:56,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 438 [2023-09-01 01:58:56,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:56,868 INFO L130 PetriNetUnfolder]: 114/211 cut-off events. [2023-09-01 01:58:56,868 INFO L131 PetriNetUnfolder]: For 340/340 co-relation queries the response was YES. [2023-09-01 01:58:56,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 211 events. 114/211 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 666 event pairs, 38 based on Foata normal form. 6/217 useless extension candidates. Maximal degree in co-relation 744. Up to 134 conditions per place. [2023-09-01 01:58:56,870 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 33 selfloop transitions, 11 changer transitions 6/50 dead transitions. [2023-09-01 01:58:56,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 359 flow [2023-09-01 01:58:56,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:58:56,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:58:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1133 transitions. [2023-09-01 01:58:56,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311263318112633 [2023-09-01 01:58:56,874 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1133 transitions. [2023-09-01 01:58:56,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1133 transitions. [2023-09-01 01:58:56,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:56,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1133 transitions. [2023-09-01 01:58:56,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.83333333333334) internal successors, (1133), 6 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:56,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 438.0) internal successors, (3066), 7 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:56,881 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 438.0) internal successors, (3066), 7 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:56,881 INFO L175 Difference]: Start difference. First operand has 37 places, 24 transitions, 136 flow. Second operand 6 states and 1133 transitions. [2023-09-01 01:58:56,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 359 flow [2023-09-01 01:58:56,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 352 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 01:58:56,886 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 216 flow [2023-09-01 01:58:56,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=216, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2023-09-01 01:58:56,888 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-09-01 01:58:56,889 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 216 flow [2023-09-01 01:58:56,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:56,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:56,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:56,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 01:58:56,890 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:56,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:56,890 INFO L85 PathProgramCache]: Analyzing trace with hash -39738501, now seen corresponding path program 2 times [2023-09-01 01:58:56,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:56,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118420290] [2023-09-01 01:58:56,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:56,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:56,944 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 01:58:56,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:56,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118420290] [2023-09-01 01:58:56,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118420290] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:58:56,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:58:56,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:58:56,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52918951] [2023-09-01 01:58:56,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:58:56,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:58:56,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:56,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:58:56,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:58:56,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 438 [2023-09-01 01:58:56,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 216 flow. Second operand has 5 states, 5 states have (on average 185.8) internal successors, (929), 5 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:56,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:56,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 438 [2023-09-01 01:58:56,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:57,048 INFO L130 PetriNetUnfolder]: 109/204 cut-off events. [2023-09-01 01:58:57,048 INFO L131 PetriNetUnfolder]: For 506/506 co-relation queries the response was YES. [2023-09-01 01:58:57,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 204 events. 109/204 cut-off events. For 506/506 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 658 event pairs, 40 based on Foata normal form. 4/208 useless extension candidates. Maximal degree in co-relation 848. Up to 130 conditions per place. [2023-09-01 01:58:57,050 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 36 selfloop transitions, 8 changer transitions 7/51 dead transitions. [2023-09-01 01:58:57,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 421 flow [2023-09-01 01:58:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:58:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:58:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 952 transitions. [2023-09-01 01:58:57,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434703196347032 [2023-09-01 01:58:57,053 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 952 transitions. [2023-09-01 01:58:57,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 952 transitions. [2023-09-01 01:58:57,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:57,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 952 transitions. [2023-09-01 01:58:57,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 190.4) internal successors, (952), 5 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:57,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:57,060 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:57,060 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 216 flow. Second operand 5 states and 952 transitions. [2023-09-01 01:58:57,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 421 flow [2023-09-01 01:58:57,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 385 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-09-01 01:58:57,064 INFO L231 Difference]: Finished difference. Result has 49 places, 30 transitions, 229 flow [2023-09-01 01:58:57,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=49, PETRI_TRANSITIONS=30} [2023-09-01 01:58:57,065 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2023-09-01 01:58:57,065 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 30 transitions, 229 flow [2023-09-01 01:58:57,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 185.8) internal successors, (929), 5 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:57,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:57,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:57,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 01:58:57,066 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:57,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:57,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1069729318, now seen corresponding path program 2 times [2023-09-01 01:58:57,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:57,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19735919] [2023-09-01 01:58:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:57,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:57,118 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 01:58:57,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:57,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19735919] [2023-09-01 01:58:57,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19735919] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:58:57,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312202541] [2023-09-01 01:58:57,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:58:57,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:57,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:58:57,121 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 01:58:57,148 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 01:58:57,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:58:57,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:58:57,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 01:58:57,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:58:57,252 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 01:58:57,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:58:57,295 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 01:58:57,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312202541] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:58:57,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:58:57,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 01:58:57,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196296246] [2023-09-01 01:58:57,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:58:57,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:58:57,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:57,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:58:57,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:58:57,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:58:57,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 30 transitions, 229 flow. Second operand has 10 states, 10 states have (on average 183.5) internal successors, (1835), 10 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:57,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:57,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:58:57,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:57,466 INFO L130 PetriNetUnfolder]: 124/235 cut-off events. [2023-09-01 01:58:57,467 INFO L131 PetriNetUnfolder]: For 624/624 co-relation queries the response was YES. [2023-09-01 01:58:57,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978 conditions, 235 events. 124/235 cut-off events. For 624/624 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 807 event pairs, 16 based on Foata normal form. 6/241 useless extension candidates. Maximal degree in co-relation 960. Up to 104 conditions per place. [2023-09-01 01:58:57,469 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 54 selfloop transitions, 15 changer transitions 2/71 dead transitions. [2023-09-01 01:58:57,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 71 transitions, 557 flow [2023-09-01 01:58:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:58:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:58:57,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1509 transitions. [2023-09-01 01:58:57,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306506849315068 [2023-09-01 01:58:57,473 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1509 transitions. [2023-09-01 01:58:57,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1509 transitions. [2023-09-01 01:58:57,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:57,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1509 transitions. [2023-09-01 01:58:57,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 188.625) internal successors, (1509), 8 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:57,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 438.0) internal successors, (3942), 9 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:57,483 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 438.0) internal successors, (3942), 9 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:57,483 INFO L175 Difference]: Start difference. First operand has 49 places, 30 transitions, 229 flow. Second operand 8 states and 1509 transitions. [2023-09-01 01:58:57,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 71 transitions, 557 flow [2023-09-01 01:58:57,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 71 transitions, 533 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 01:58:57,487 INFO L231 Difference]: Finished difference. Result has 56 places, 36 transitions, 313 flow [2023-09-01 01:58:57,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=313, PETRI_PLACES=56, PETRI_TRANSITIONS=36} [2023-09-01 01:58:57,488 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2023-09-01 01:58:57,488 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 36 transitions, 313 flow [2023-09-01 01:58:57,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 183.5) internal successors, (1835), 10 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:57,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:57,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:57,509 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 01:58:57,695 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,SelfDestructingSolverStorable10 [2023-09-01 01:58:57,695 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:57,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:57,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1574503695, now seen corresponding path program 3 times [2023-09-01 01:58:57,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:57,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739867672] [2023-09-01 01:58:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:57,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:57,746 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 01:58:57,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:57,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739867672] [2023-09-01 01:58:57,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739867672] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:58:57,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032989264] [2023-09-01 01:58:57,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:58:57,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:57,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:58:57,749 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 01:58:57,774 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 01:58:57,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 01:58:57,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:58:57,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 01:58:57,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:58:57,861 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 01:58:57,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:58:57,883 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 01:58:57,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032989264] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:58:57,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:58:57,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 01:58:57,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980135173] [2023-09-01 01:58:57,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:58:57,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 01:58:57,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:57,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 01:58:57,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 01:58:57,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:58:57,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 36 transitions, 313 flow. Second operand has 8 states, 8 states have (on average 183.625) internal successors, (1469), 8 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:57,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:57,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:58:57,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:58,046 INFO L130 PetriNetUnfolder]: 130/245 cut-off events. [2023-09-01 01:58:58,046 INFO L131 PetriNetUnfolder]: For 852/852 co-relation queries the response was YES. [2023-09-01 01:58:58,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1117 conditions, 245 events. 130/245 cut-off events. For 852/852 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 839 event pairs, 16 based on Foata normal form. 4/249 useless extension candidates. Maximal degree in co-relation 1096. Up to 104 conditions per place. [2023-09-01 01:58:58,049 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 40 selfloop transitions, 13 changer transitions 1/54 dead transitions. [2023-09-01 01:58:58,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 518 flow [2023-09-01 01:58:58,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:58:58,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:58:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 941 transitions. [2023-09-01 01:58:58,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42968036529680365 [2023-09-01 01:58:58,052 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 941 transitions. [2023-09-01 01:58:58,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 941 transitions. [2023-09-01 01:58:58,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:58,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 941 transitions. [2023-09-01 01:58:58,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 188.2) internal successors, (941), 5 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:58,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:58,070 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:58,070 INFO L175 Difference]: Start difference. First operand has 56 places, 36 transitions, 313 flow. Second operand 5 states and 941 transitions. [2023-09-01 01:58:58,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 518 flow [2023-09-01 01:58:58,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 495 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 01:58:58,076 INFO L231 Difference]: Finished difference. Result has 59 places, 38 transitions, 356 flow [2023-09-01 01:58:58,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=356, PETRI_PLACES=59, PETRI_TRANSITIONS=38} [2023-09-01 01:58:58,078 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2023-09-01 01:58:58,078 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 38 transitions, 356 flow [2023-09-01 01:58:58,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 183.625) internal successors, (1469), 8 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:58,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:58,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:58,093 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 01:58:58,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:58,289 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:58,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:58,289 INFO L85 PathProgramCache]: Analyzing trace with hash -97791812, now seen corresponding path program 3 times [2023-09-01 01:58:58,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:58,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002538467] [2023-09-01 01:58:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:58,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:58,353 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 01:58:58,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:58,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002538467] [2023-09-01 01:58:58,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002538467] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:58:58,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:58:58,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:58:58,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285513970] [2023-09-01 01:58:58,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:58:58,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:58:58,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:58,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:58:58,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:58:58,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 438 [2023-09-01 01:58:58,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 38 transitions, 356 flow. Second operand has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:58,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:58,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 438 [2023-09-01 01:58:58,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:58,479 INFO L130 PetriNetUnfolder]: 122/229 cut-off events. [2023-09-01 01:58:58,480 INFO L131 PetriNetUnfolder]: For 1046/1046 co-relation queries the response was YES. [2023-09-01 01:58:58,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1061 conditions, 229 events. 122/229 cut-off events. For 1046/1046 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 766 event pairs, 40 based on Foata normal form. 6/235 useless extension candidates. Maximal degree in co-relation 1038. Up to 160 conditions per place. [2023-09-01 01:58:58,482 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 36 selfloop transitions, 11 changer transitions 9/56 dead transitions. [2023-09-01 01:58:58,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 56 transitions, 524 flow [2023-09-01 01:58:58,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:58:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:58:58,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1134 transitions. [2023-09-01 01:58:58,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315068493150685 [2023-09-01 01:58:58,486 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1134 transitions. [2023-09-01 01:58:58,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1134 transitions. [2023-09-01 01:58:58,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:58,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1134 transitions. [2023-09-01 01:58:58,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:58,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 438.0) internal successors, (3066), 7 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:58,492 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 438.0) internal successors, (3066), 7 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:58,492 INFO L175 Difference]: Start difference. First operand has 59 places, 38 transitions, 356 flow. Second operand 6 states and 1134 transitions. [2023-09-01 01:58:58,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 56 transitions, 524 flow [2023-09-01 01:58:58,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 56 transitions, 507 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 01:58:58,498 INFO L231 Difference]: Finished difference. Result has 62 places, 34 transitions, 308 flow [2023-09-01 01:58:58,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=62, PETRI_TRANSITIONS=34} [2023-09-01 01:58:58,499 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 33 predicate places. [2023-09-01 01:58:58,499 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 34 transitions, 308 flow [2023-09-01 01:58:58,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:58,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:58,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:58,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 01:58:58,501 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:58,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:58,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1147575501, now seen corresponding path program 4 times [2023-09-01 01:58:58,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:58,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037726832] [2023-09-01 01:58:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:58,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:58,582 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 01:58:58,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:58,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037726832] [2023-09-01 01:58:58,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037726832] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:58:58,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74947301] [2023-09-01 01:58:58,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:58:58,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:58,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:58:58,585 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 01:58:58,611 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 01:58:58,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:58:58,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:58:58,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 01:58:58,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:58:58,700 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 01:58:58,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:58:58,721 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 01:58:58,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74947301] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:58:58,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:58:58,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 01:58:58,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808095692] [2023-09-01 01:58:58,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:58:58,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:58:58,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:58,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:58:58,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:58:58,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:58:58,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 34 transitions, 308 flow. Second operand has 10 states, 10 states have (on average 183.3) internal successors, (1833), 10 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:58,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:58,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:58:58,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:58,887 INFO L130 PetriNetUnfolder]: 122/219 cut-off events. [2023-09-01 01:58:58,887 INFO L131 PetriNetUnfolder]: For 880/880 co-relation queries the response was YES. [2023-09-01 01:58:58,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 219 events. 122/219 cut-off events. For 880/880 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 675 event pairs, 43 based on Foata normal form. 4/223 useless extension candidates. Maximal degree in co-relation 1009. Up to 161 conditions per place. [2023-09-01 01:58:58,890 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 37 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2023-09-01 01:58:58,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 48 transitions, 462 flow [2023-09-01 01:58:58,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:58:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:58:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 940 transitions. [2023-09-01 01:58:58,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292237442922374 [2023-09-01 01:58:58,893 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 940 transitions. [2023-09-01 01:58:58,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 940 transitions. [2023-09-01 01:58:58,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:58,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 940 transitions. [2023-09-01 01:58:58,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:58,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:58,899 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:58,899 INFO L175 Difference]: Start difference. First operand has 62 places, 34 transitions, 308 flow. Second operand 5 states and 940 transitions. [2023-09-01 01:58:58,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 48 transitions, 462 flow [2023-09-01 01:58:58,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 48 transitions, 413 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-09-01 01:58:58,904 INFO L231 Difference]: Finished difference. Result has 57 places, 35 transitions, 298 flow [2023-09-01 01:58:58,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=57, PETRI_TRANSITIONS=35} [2023-09-01 01:58:58,904 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 28 predicate places. [2023-09-01 01:58:58,905 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 35 transitions, 298 flow [2023-09-01 01:58:58,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 183.3) internal successors, (1833), 10 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:58,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:58,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:58,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 01:58:59,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:59,116 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:59,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:59,117 INFO L85 PathProgramCache]: Analyzing trace with hash 279076464, now seen corresponding path program 4 times [2023-09-01 01:58:59,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:59,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283167190] [2023-09-01 01:58:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:59,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:59,198 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 01:58:59,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:59,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283167190] [2023-09-01 01:58:59,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283167190] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:58:59,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456890275] [2023-09-01 01:58:59,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:58:59,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:59,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:58:59,201 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 01:58:59,224 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 01:58:59,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:58:59,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:58:59,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 01:58:59,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:58:59,309 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 01:58:59,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:58:59,331 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 01:58:59,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456890275] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:58:59,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:58:59,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 01:58:59,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512829152] [2023-09-01 01:58:59,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:58:59,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:58:59,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:59,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:58:59,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:58:59,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:58:59,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 35 transitions, 298 flow. Second operand has 10 states, 10 states have (on average 183.4) internal successors, (1834), 10 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:59,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:59,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:58:59,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:59,522 INFO L130 PetriNetUnfolder]: 114/203 cut-off events. [2023-09-01 01:58:59,522 INFO L131 PetriNetUnfolder]: For 676/676 co-relation queries the response was YES. [2023-09-01 01:58:59,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946 conditions, 203 events. 114/203 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 587 event pairs, 37 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 924. Up to 153 conditions per place. [2023-09-01 01:58:59,524 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 33 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2023-09-01 01:58:59,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 45 transitions, 421 flow [2023-09-01 01:58:59,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:58:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:58:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 937 transitions. [2023-09-01 01:58:59,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278538812785388 [2023-09-01 01:58:59,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 937 transitions. [2023-09-01 01:58:59,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 937 transitions. [2023-09-01 01:58:59,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:59,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 937 transitions. [2023-09-01 01:58:59,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.4) internal successors, (937), 5 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:59,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:59,537 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:59,537 INFO L175 Difference]: Start difference. First operand has 57 places, 35 transitions, 298 flow. Second operand 5 states and 937 transitions. [2023-09-01 01:58:59,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 45 transitions, 421 flow [2023-09-01 01:58:59,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 45 transitions, 405 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 01:58:59,540 INFO L231 Difference]: Finished difference. Result has 58 places, 34 transitions, 295 flow [2023-09-01 01:58:59,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=58, PETRI_TRANSITIONS=34} [2023-09-01 01:58:59,541 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2023-09-01 01:58:59,541 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 34 transitions, 295 flow [2023-09-01 01:58:59,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 183.4) internal successors, (1834), 10 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:59,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:59,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:59,572 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 01:58:59,742 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,SelfDestructingSolverStorable14 [2023-09-01 01:58:59,742 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:58:59,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:59,743 INFO L85 PathProgramCache]: Analyzing trace with hash 24975495, now seen corresponding path program 5 times [2023-09-01 01:58:59,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:59,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658469320] [2023-09-01 01:58:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:59,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:59,792 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 01:58:59,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658469320] [2023-09-01 01:58:59,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658469320] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:58:59,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669692959] [2023-09-01 01:58:59,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:58:59,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:59,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:58:59,794 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 01:58:59,797 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 01:58:59,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:58:59,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:58:59,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 01:58:59,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:58:59,900 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 01:58:59,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:58:59,923 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 01:58:59,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669692959] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:58:59,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:58:59,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 01:58:59,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351009720] [2023-09-01 01:58:59,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:58:59,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:58:59,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:59,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:58:59,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:58:59,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:58:59,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 34 transitions, 295 flow. Second operand has 10 states, 10 states have (on average 183.5) internal successors, (1835), 10 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:58:59,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:59,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:58:59,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:00,084 INFO L130 PetriNetUnfolder]: 110/193 cut-off events. [2023-09-01 01:59:00,084 INFO L131 PetriNetUnfolder]: For 641/641 co-relation queries the response was YES. [2023-09-01 01:59:00,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 193 events. 110/193 cut-off events. For 641/641 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 566 event pairs, 9 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 906. Up to 86 conditions per place. [2023-09-01 01:59:00,086 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 37 selfloop transitions, 17 changer transitions 0/54 dead transitions. [2023-09-01 01:59:00,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 54 transitions, 488 flow [2023-09-01 01:59:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:59:00,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:59:00,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1492 transitions. [2023-09-01 01:59:00,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257990867579909 [2023-09-01 01:59:00,093 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1492 transitions. [2023-09-01 01:59:00,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1492 transitions. [2023-09-01 01:59:00,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:00,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1492 transitions. [2023-09-01 01:59:00,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 186.5) internal successors, (1492), 8 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:00,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 438.0) internal successors, (3942), 9 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:00,101 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 438.0) internal successors, (3942), 9 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:00,102 INFO L175 Difference]: Start difference. First operand has 58 places, 34 transitions, 295 flow. Second operand 8 states and 1492 transitions. [2023-09-01 01:59:00,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 54 transitions, 488 flow [2023-09-01 01:59:00,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 440 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-09-01 01:59:00,106 INFO L231 Difference]: Finished difference. Result has 57 places, 35 transitions, 291 flow [2023-09-01 01:59:00,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=291, PETRI_PLACES=57, PETRI_TRANSITIONS=35} [2023-09-01 01:59:00,107 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 28 predicate places. [2023-09-01 01:59:00,107 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 35 transitions, 291 flow [2023-09-01 01:59:00,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 183.5) internal successors, (1835), 10 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:00,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:00,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:00,116 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 01:59:00,314 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,SelfDestructingSolverStorable15 [2023-09-01 01:59:00,314 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:00,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:00,315 INFO L85 PathProgramCache]: Analyzing trace with hash 832856233, now seen corresponding path program 1 times [2023-09-01 01:59:00,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:00,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745608410] [2023-09-01 01:59:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:00,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:00,654 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 01:59:00,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:00,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745608410] [2023-09-01 01:59:00,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745608410] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:00,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139145456] [2023-09-01 01:59:00,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:00,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:00,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:00,661 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 01:59:00,664 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 01:59:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:00,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 01:59:00,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:00,911 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 01:59:00,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:01,072 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 01:59:01,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139145456] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:01,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:01,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 01:59:01,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982952321] [2023-09-01 01:59:01,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:01,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:59:01,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:01,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:59:01,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:59:01,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 01:59:01,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 35 transitions, 291 flow. Second operand has 12 states, 12 states have (on average 175.33333333333334) internal successors, (2104), 12 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:01,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:01,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 01:59:01,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:01,498 INFO L130 PetriNetUnfolder]: 133/239 cut-off events. [2023-09-01 01:59:01,498 INFO L131 PetriNetUnfolder]: For 636/660 co-relation queries the response was YES. [2023-09-01 01:59:01,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 239 events. 133/239 cut-off events. For 636/660 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 815 event pairs, 6 based on Foata normal form. 11/244 useless extension candidates. Maximal degree in co-relation 1060. Up to 168 conditions per place. [2023-09-01 01:59:01,500 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 36 selfloop transitions, 17 changer transitions 5/64 dead transitions. [2023-09-01 01:59:01,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 533 flow [2023-09-01 01:59:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:59:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:59:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1251 transitions. [2023-09-01 01:59:01,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080234833659491 [2023-09-01 01:59:01,505 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1251 transitions. [2023-09-01 01:59:01,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1251 transitions. [2023-09-01 01:59:01,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:01,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1251 transitions. [2023-09-01 01:59:01,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.71428571428572) internal successors, (1251), 7 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:01,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:01,513 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:01,513 INFO L175 Difference]: Start difference. First operand has 57 places, 35 transitions, 291 flow. Second operand 7 states and 1251 transitions. [2023-09-01 01:59:01,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 533 flow [2023-09-01 01:59:01,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 482 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-09-01 01:59:01,517 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 382 flow [2023-09-01 01:59:01,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=382, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2023-09-01 01:59:01,518 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2023-09-01 01:59:01,518 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 382 flow [2023-09-01 01:59:01,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 175.33333333333334) internal successors, (2104), 12 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:01,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:01,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:01,524 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 01:59:01,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:01,725 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:01,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:01,725 INFO L85 PathProgramCache]: Analyzing trace with hash 734698065, now seen corresponding path program 2 times [2023-09-01 01:59:01,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:01,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977337043] [2023-09-01 01:59:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:01,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:02,027 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 01:59:02,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977337043] [2023-09-01 01:59:02,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977337043] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:02,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036675370] [2023-09-01 01:59:02,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:59:02,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:02,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:02,029 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 01:59:02,051 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 01:59:02,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:59:02,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:02,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 01:59:02,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:02,231 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 01:59:02,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:02,388 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 01:59:02,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036675370] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:02,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:02,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-09-01 01:59:02,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605914276] [2023-09-01 01:59:02,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:02,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:59:02,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:02,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:59:02,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:59:02,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 01:59:02,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 382 flow. Second operand has 14 states, 14 states have (on average 175.42857142857142) internal successors, (2456), 14 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:02,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:02,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 01:59:02,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:02,784 INFO L130 PetriNetUnfolder]: 145/265 cut-off events. [2023-09-01 01:59:02,784 INFO L131 PetriNetUnfolder]: For 878/914 co-relation queries the response was YES. [2023-09-01 01:59:02,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1272 conditions, 265 events. 145/265 cut-off events. For 878/914 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 960 event pairs, 8 based on Foata normal form. 11/270 useless extension candidates. Maximal degree in co-relation 1250. Up to 172 conditions per place. [2023-09-01 01:59:02,787 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 40 selfloop transitions, 20 changer transitions 5/71 dead transitions. [2023-09-01 01:59:02,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 71 transitions, 616 flow [2023-09-01 01:59:02,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:59:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:59:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1256 transitions. [2023-09-01 01:59:02,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096542726679713 [2023-09-01 01:59:02,790 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1256 transitions. [2023-09-01 01:59:02,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1256 transitions. [2023-09-01 01:59:02,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:02,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1256 transitions. [2023-09-01 01:59:02,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 179.42857142857142) internal successors, (1256), 7 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:02,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:02,798 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:02,798 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 382 flow. Second operand 7 states and 1256 transitions. [2023-09-01 01:59:02,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 71 transitions, 616 flow [2023-09-01 01:59:02,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 71 transitions, 583 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-09-01 01:59:02,805 INFO L231 Difference]: Finished difference. Result has 66 places, 49 transitions, 451 flow [2023-09-01 01:59:02,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=451, PETRI_PLACES=66, PETRI_TRANSITIONS=49} [2023-09-01 01:59:02,805 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 37 predicate places. [2023-09-01 01:59:02,806 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 49 transitions, 451 flow [2023-09-01 01:59:02,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 175.42857142857142) internal successors, (2456), 14 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:02,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:02,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:02,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:03,019 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,SelfDestructingSolverStorable17 [2023-09-01 01:59:03,020 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:03,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:03,020 INFO L85 PathProgramCache]: Analyzing trace with hash 762403695, now seen corresponding path program 3 times [2023-09-01 01:59:03,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:03,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567057796] [2023-09-01 01:59:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:03,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:03,247 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 01:59:03,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:03,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567057796] [2023-09-01 01:59:03,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567057796] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:03,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391529000] [2023-09-01 01:59:03,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:59:03,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:03,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:03,250 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 01:59:03,278 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 01:59:03,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 01:59:03,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:03,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 01:59:03,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:03,473 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 01:59:03,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:03,619 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 01:59:03,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391529000] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:03,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:03,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 01:59:03,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806058574] [2023-09-01 01:59:03,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:03,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:59:03,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:03,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:59:03,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:59:03,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 01:59:03,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 49 transitions, 451 flow. Second operand has 12 states, 12 states have (on average 175.66666666666666) internal successors, (2108), 12 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:03,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:03,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 01:59:03,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:03,964 INFO L130 PetriNetUnfolder]: 142/256 cut-off events. [2023-09-01 01:59:03,964 INFO L131 PetriNetUnfolder]: For 1249/1277 co-relation queries the response was YES. [2023-09-01 01:59:03,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1322 conditions, 256 events. 142/256 cut-off events. For 1249/1277 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 912 event pairs, 8 based on Foata normal form. 9/259 useless extension candidates. Maximal degree in co-relation 1297. Up to 172 conditions per place. [2023-09-01 01:59:03,966 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 36 selfloop transitions, 21 changer transitions 5/68 dead transitions. [2023-09-01 01:59:03,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 648 flow [2023-09-01 01:59:03,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:59:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:59:03,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1252 transitions. [2023-09-01 01:59:03,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40834964122635353 [2023-09-01 01:59:03,981 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1252 transitions. [2023-09-01 01:59:03,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1252 transitions. [2023-09-01 01:59:03,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:03,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1252 transitions. [2023-09-01 01:59:03,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.85714285714286) internal successors, (1252), 7 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:03,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:03,989 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:03,989 INFO L175 Difference]: Start difference. First operand has 66 places, 49 transitions, 451 flow. Second operand 7 states and 1252 transitions. [2023-09-01 01:59:03,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 648 flow [2023-09-01 01:59:03,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 579 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-09-01 01:59:03,994 INFO L231 Difference]: Finished difference. Result has 70 places, 51 transitions, 472 flow [2023-09-01 01:59:03,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=472, PETRI_PLACES=70, PETRI_TRANSITIONS=51} [2023-09-01 01:59:03,995 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2023-09-01 01:59:03,995 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 51 transitions, 472 flow [2023-09-01 01:59:03,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 175.66666666666666) internal successors, (2108), 12 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:03,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:03,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:04,005 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 01:59:04,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:04,202 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:04,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:04,203 INFO L85 PathProgramCache]: Analyzing trace with hash -625469757, now seen corresponding path program 4 times [2023-09-01 01:59:04,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:04,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919189879] [2023-09-01 01:59:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:04,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:04,465 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 01:59:04,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:04,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919189879] [2023-09-01 01:59:04,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919189879] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:04,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276586479] [2023-09-01 01:59:04,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:59:04,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:04,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:04,467 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 01:59:04,471 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 01:59:04,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:59:04,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:04,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 01:59:04,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:04,700 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 01:59:04,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:04,837 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 01:59:04,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276586479] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:04,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:04,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-09-01 01:59:04,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646134612] [2023-09-01 01:59:04,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:04,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 01:59:04,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:04,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 01:59:04,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-09-01 01:59:04,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 01:59:04,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 51 transitions, 472 flow. Second operand has 11 states, 11 states have (on average 175.8181818181818) internal successors, (1934), 11 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:04,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:04,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 01:59:04,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:05,141 INFO L130 PetriNetUnfolder]: 166/298 cut-off events. [2023-09-01 01:59:05,141 INFO L131 PetriNetUnfolder]: For 1490/1518 co-relation queries the response was YES. [2023-09-01 01:59:05,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1560 conditions, 298 events. 166/298 cut-off events. For 1490/1518 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1121 event pairs, 10 based on Foata normal form. 9/301 useless extension candidates. Maximal degree in co-relation 1533. Up to 244 conditions per place. [2023-09-01 01:59:05,145 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 44 selfloop transitions, 17 changer transitions 5/72 dead transitions. [2023-09-01 01:59:05,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 726 flow [2023-09-01 01:59:05,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:59:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:59:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1243 transitions. [2023-09-01 01:59:05,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40541422048271364 [2023-09-01 01:59:05,151 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1243 transitions. [2023-09-01 01:59:05,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1243 transitions. [2023-09-01 01:59:05,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:05,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1243 transitions. [2023-09-01 01:59:05,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 177.57142857142858) internal successors, (1243), 7 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:05,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:05,159 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:05,159 INFO L175 Difference]: Start difference. First operand has 70 places, 51 transitions, 472 flow. Second operand 7 states and 1243 transitions. [2023-09-01 01:59:05,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 726 flow [2023-09-01 01:59:05,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 72 transitions, 679 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-09-01 01:59:05,165 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 579 flow [2023-09-01 01:59:05,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=579, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2023-09-01 01:59:05,166 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 45 predicate places. [2023-09-01 01:59:05,166 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 579 flow [2023-09-01 01:59:05,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 175.8181818181818) internal successors, (1934), 11 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:05,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:05,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:05,173 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 01:59:05,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:05,373 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:05,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:05,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2034948761, now seen corresponding path program 5 times [2023-09-01 01:59:05,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:05,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543430170] [2023-09-01 01:59:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:05,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:05,618 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 01:59:05,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:05,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543430170] [2023-09-01 01:59:05,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543430170] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:05,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651556207] [2023-09-01 01:59:05,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:59:05,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:05,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:05,621 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 01:59:05,637 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 01:59:05,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 01:59:05,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:05,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 01:59:05,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:05,813 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 01:59:05,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:05,962 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 01:59:05,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651556207] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:05,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:05,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-09-01 01:59:05,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642022510] [2023-09-01 01:59:05,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:05,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:59:05,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:05,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:59:05,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:59:06,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 01:59:06,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 579 flow. Second operand has 14 states, 14 states have (on average 175.42857142857142) internal successors, (2456), 14 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:06,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:06,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 01:59:06,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:06,310 INFO L130 PetriNetUnfolder]: 180/326 cut-off events. [2023-09-01 01:59:06,310 INFO L131 PetriNetUnfolder]: For 1760/1788 co-relation queries the response was YES. [2023-09-01 01:59:06,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1779 conditions, 326 events. 180/326 cut-off events. For 1760/1788 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1255 event pairs, 10 based on Foata normal form. 9/329 useless extension candidates. Maximal degree in co-relation 1750. Up to 248 conditions per place. [2023-09-01 01:59:06,314 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 50 selfloop transitions, 20 changer transitions 5/81 dead transitions. [2023-09-01 01:59:06,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 838 flow [2023-09-01 01:59:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:59:06,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:59:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1250 transitions. [2023-09-01 01:59:06,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40769732550554466 [2023-09-01 01:59:06,317 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1250 transitions. [2023-09-01 01:59:06,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1250 transitions. [2023-09-01 01:59:06,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:06,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1250 transitions. [2023-09-01 01:59:06,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.57142857142858) internal successors, (1250), 7 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:06,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:06,323 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:06,323 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 579 flow. Second operand 7 states and 1250 transitions. [2023-09-01 01:59:06,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 838 flow [2023-09-01 01:59:06,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 81 transitions, 801 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-09-01 01:59:06,331 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 656 flow [2023-09-01 01:59:06,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=656, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2023-09-01 01:59:06,332 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 51 predicate places. [2023-09-01 01:59:06,332 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 656 flow [2023-09-01 01:59:06,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 175.42857142857142) internal successors, (2456), 14 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:06,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:06,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:06,338 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 01:59:06,537 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,SelfDestructingSolverStorable20 [2023-09-01 01:59:06,538 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:06,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:06,538 INFO L85 PathProgramCache]: Analyzing trace with hash -634984093, now seen corresponding path program 6 times [2023-09-01 01:59:06,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:06,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281369697] [2023-09-01 01:59:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:06,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:06,817 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 01:59:06,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:06,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281369697] [2023-09-01 01:59:06,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281369697] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:06,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696689362] [2023-09-01 01:59:06,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 01:59:06,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:06,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:06,820 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 01:59:06,822 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 01:59:06,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 01:59:06,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:06,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 01:59:06,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:07,032 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 01:59:07,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:07,169 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 01:59:07,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696689362] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:07,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:07,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 01:59:07,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670771769] [2023-09-01 01:59:07,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:07,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:59:07,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:07,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:59:07,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:59:07,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 01:59:07,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 656 flow. Second operand has 13 states, 13 states have (on average 175.23076923076923) internal successors, (2278), 13 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:07,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:07,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 01:59:07,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:07,496 INFO L130 PetriNetUnfolder]: 177/317 cut-off events. [2023-09-01 01:59:07,497 INFO L131 PetriNetUnfolder]: For 2082/2110 co-relation queries the response was YES. [2023-09-01 01:59:07,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1813 conditions, 317 events. 177/317 cut-off events. For 2082/2110 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1215 event pairs, 10 based on Foata normal form. 9/320 useless extension candidates. Maximal degree in co-relation 1781. Up to 248 conditions per place. [2023-09-01 01:59:07,501 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 48 selfloop transitions, 21 changer transitions 5/80 dead transitions. [2023-09-01 01:59:07,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 80 transitions, 879 flow [2023-09-01 01:59:07,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:59:07,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:59:07,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1248 transitions. [2023-09-01 01:59:07,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4070450097847358 [2023-09-01 01:59:07,504 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1248 transitions. [2023-09-01 01:59:07,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1248 transitions. [2023-09-01 01:59:07,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:07,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1248 transitions. [2023-09-01 01:59:07,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.28571428571428) internal successors, (1248), 7 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:07,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:07,511 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:07,511 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 656 flow. Second operand 7 states and 1248 transitions. [2023-09-01 01:59:07,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 80 transitions, 879 flow [2023-09-01 01:59:07,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 80 transitions, 801 flow, removed 30 selfloop flow, removed 3 redundant places. [2023-09-01 01:59:07,521 INFO L231 Difference]: Finished difference. Result has 85 places, 67 transitions, 678 flow [2023-09-01 01:59:07,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=678, PETRI_PLACES=85, PETRI_TRANSITIONS=67} [2023-09-01 01:59:07,522 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2023-09-01 01:59:07,522 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 67 transitions, 678 flow [2023-09-01 01:59:07,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 175.23076923076923) internal successors, (2278), 13 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:07,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:07,523 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:07,535 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 01:59:07,730 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,SelfDestructingSolverStorable21 [2023-09-01 01:59:07,730 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:07,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:07,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1081669548, now seen corresponding path program 7 times [2023-09-01 01:59:07,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:07,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696715525] [2023-09-01 01:59:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:07,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:07,804 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 01:59:07,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:07,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696715525] [2023-09-01 01:59:07,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696715525] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:07,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368290049] [2023-09-01 01:59:07,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 01:59:07,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:07,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:07,806 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 01:59:07,840 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 01:59:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:07,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:07,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:07,963 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 01:59:07,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:08,003 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 01:59:08,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368290049] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:08,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:08,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-09-01 01:59:08,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672796750] [2023-09-01 01:59:08,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:08,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:59:08,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:08,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:59:08,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:59:08,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:08,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 67 transitions, 678 flow. Second operand has 13 states, 13 states have (on average 183.07692307692307) internal successors, (2380), 13 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:08,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:08,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:08,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:08,408 INFO L130 PetriNetUnfolder]: 265/498 cut-off events. [2023-09-01 01:59:08,408 INFO L131 PetriNetUnfolder]: For 3070/3070 co-relation queries the response was YES. [2023-09-01 01:59:08,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2726 conditions, 498 events. 265/498 cut-off events. For 3070/3070 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2181 event pairs, 33 based on Foata normal form. 8/506 useless extension candidates. Maximal degree in co-relation 2691. Up to 157 conditions per place. [2023-09-01 01:59:08,433 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 98 selfloop transitions, 64 changer transitions 6/168 dead transitions. [2023-09-01 01:59:08,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 168 transitions, 1703 flow [2023-09-01 01:59:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 01:59:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 01:59:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3362 transitions. [2023-09-01 01:59:08,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42643328259766616 [2023-09-01 01:59:08,439 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3362 transitions. [2023-09-01 01:59:08,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3362 transitions. [2023-09-01 01:59:08,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:08,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3362 transitions. [2023-09-01 01:59:08,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 186.77777777777777) internal successors, (3362), 18 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:08,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:08,455 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:08,455 INFO L175 Difference]: Start difference. First operand has 85 places, 67 transitions, 678 flow. Second operand 18 states and 3362 transitions. [2023-09-01 01:59:08,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 168 transitions, 1703 flow [2023-09-01 01:59:08,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 168 transitions, 1600 flow, removed 33 selfloop flow, removed 4 redundant places. [2023-09-01 01:59:08,470 INFO L231 Difference]: Finished difference. Result has 103 places, 100 transitions, 1184 flow [2023-09-01 01:59:08,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1184, PETRI_PLACES=103, PETRI_TRANSITIONS=100} [2023-09-01 01:59:08,471 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 74 predicate places. [2023-09-01 01:59:08,471 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 1184 flow [2023-09-01 01:59:08,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 183.07692307692307) internal successors, (2380), 13 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:08,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:08,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:08,480 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 01:59:08,677 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,SelfDestructingSolverStorable22 [2023-09-01 01:59:08,677 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:08,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:08,678 INFO L85 PathProgramCache]: Analyzing trace with hash -626005490, now seen corresponding path program 8 times [2023-09-01 01:59:08,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:08,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086265772] [2023-09-01 01:59:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:08,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:08,751 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 01:59:08,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:08,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086265772] [2023-09-01 01:59:08,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086265772] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:08,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146106680] [2023-09-01 01:59:08,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:59:08,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:08,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:08,754 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 01:59:08,757 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 01:59:08,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:59:08,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:08,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:08,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:08,877 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 01:59:08,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:08,907 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 01:59:08,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146106680] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:08,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:08,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-09-01 01:59:08,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614987522] [2023-09-01 01:59:08,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:08,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 01:59:08,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:08,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 01:59:08,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-09-01 01:59:08,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:08,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 100 transitions, 1184 flow. Second operand has 11 states, 11 states have (on average 183.0909090909091) internal successors, (2014), 11 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:08,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:08,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:08,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:09,145 INFO L130 PetriNetUnfolder]: 246/457 cut-off events. [2023-09-01 01:59:09,145 INFO L131 PetriNetUnfolder]: For 3440/3440 co-relation queries the response was YES. [2023-09-01 01:59:09,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2790 conditions, 457 events. 246/457 cut-off events. For 3440/3440 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1912 event pairs, 33 based on Foata normal form. 4/461 useless extension candidates. Maximal degree in co-relation 2750. Up to 133 conditions per place. [2023-09-01 01:59:09,151 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 65 selfloop transitions, 61 changer transitions 10/136 dead transitions. [2023-09-01 01:59:09,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 136 transitions, 1658 flow [2023-09-01 01:59:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 01:59:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 01:59:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2053 transitions. [2023-09-01 01:59:09,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261104192611042 [2023-09-01 01:59:09,154 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2053 transitions. [2023-09-01 01:59:09,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2053 transitions. [2023-09-01 01:59:09,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:09,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2053 transitions. [2023-09-01 01:59:09,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 186.63636363636363) internal successors, (2053), 11 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:09,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:09,162 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:09,162 INFO L175 Difference]: Start difference. First operand has 103 places, 100 transitions, 1184 flow. Second operand 11 states and 2053 transitions. [2023-09-01 01:59:09,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 136 transitions, 1658 flow [2023-09-01 01:59:09,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 136 transitions, 1496 flow, removed 58 selfloop flow, removed 4 redundant places. [2023-09-01 01:59:09,180 INFO L231 Difference]: Finished difference. Result has 112 places, 102 transitions, 1246 flow [2023-09-01 01:59:09,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1246, PETRI_PLACES=112, PETRI_TRANSITIONS=102} [2023-09-01 01:59:09,181 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 83 predicate places. [2023-09-01 01:59:09,181 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 102 transitions, 1246 flow [2023-09-01 01:59:09,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 183.0909090909091) internal successors, (2014), 11 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:09,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:09,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:09,189 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 01:59:09,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:09,387 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:09,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:09,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1364339437, now seen corresponding path program 9 times [2023-09-01 01:59:09,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:09,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797305843] [2023-09-01 01:59:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:09,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:09,477 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 01:59:09,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:09,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797305843] [2023-09-01 01:59:09,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797305843] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:09,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795134213] [2023-09-01 01:59:09,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:59:09,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:09,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:09,480 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 01:59:09,482 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 01:59:09,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 01:59:09,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:09,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:09,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:09,623 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 01:59:09,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:09,664 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 01:59:09,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795134213] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:09,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:09,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-09-01 01:59:09,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408630392] [2023-09-01 01:59:09,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:09,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 01:59:09,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:09,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 01:59:09,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-09-01 01:59:09,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:09,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 102 transitions, 1246 flow. Second operand has 11 states, 11 states have (on average 183.27272727272728) internal successors, (2016), 11 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:09,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:09,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:09,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:09,919 INFO L130 PetriNetUnfolder]: 256/471 cut-off events. [2023-09-01 01:59:09,920 INFO L131 PetriNetUnfolder]: For 3477/3477 co-relation queries the response was YES. [2023-09-01 01:59:09,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2930 conditions, 471 events. 256/471 cut-off events. For 3477/3477 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1971 event pairs, 21 based on Foata normal form. 6/477 useless extension candidates. Maximal degree in co-relation 2886. Up to 200 conditions per place. [2023-09-01 01:59:09,926 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 91 selfloop transitions, 41 changer transitions 0/132 dead transitions. [2023-09-01 01:59:09,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 132 transitions, 1724 flow [2023-09-01 01:59:09,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:59:09,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:59:09,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1320 transitions. [2023-09-01 01:59:09,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43052837573385516 [2023-09-01 01:59:09,929 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1320 transitions. [2023-09-01 01:59:09,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1320 transitions. [2023-09-01 01:59:09,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:09,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1320 transitions. [2023-09-01 01:59:09,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 188.57142857142858) internal successors, (1320), 7 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:09,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:09,934 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:09,934 INFO L175 Difference]: Start difference. First operand has 112 places, 102 transitions, 1246 flow. Second operand 7 states and 1320 transitions. [2023-09-01 01:59:09,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 132 transitions, 1724 flow [2023-09-01 01:59:09,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 132 transitions, 1605 flow, removed 22 selfloop flow, removed 10 redundant places. [2023-09-01 01:59:09,956 INFO L231 Difference]: Finished difference. Result has 108 places, 104 transitions, 1248 flow [2023-09-01 01:59:09,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1248, PETRI_PLACES=108, PETRI_TRANSITIONS=104} [2023-09-01 01:59:09,957 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 79 predicate places. [2023-09-01 01:59:09,957 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 104 transitions, 1248 flow [2023-09-01 01:59:09,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 183.27272727272728) internal successors, (2016), 11 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:09,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:09,958 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:09,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:10,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:10,173 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:10,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:10,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1862073491, now seen corresponding path program 10 times [2023-09-01 01:59:10,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:10,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202895673] [2023-09-01 01:59:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:10,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:10,246 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 01:59:10,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:10,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202895673] [2023-09-01 01:59:10,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202895673] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:10,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800249536] [2023-09-01 01:59:10,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:59:10,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:10,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:10,248 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 01:59:10,250 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 01:59:10,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:59:10,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:10,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:10,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:10,381 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 01:59:10,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:10,410 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 01:59:10,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800249536] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:10,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:10,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 01:59:10,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491392417] [2023-09-01 01:59:10,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:10,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:59:10,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:10,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:59:10,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:59:10,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:10,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 104 transitions, 1248 flow. Second operand has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:10,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:10,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:10,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:10,857 INFO L130 PetriNetUnfolder]: 324/611 cut-off events. [2023-09-01 01:59:10,858 INFO L131 PetriNetUnfolder]: For 6147/6147 co-relation queries the response was YES. [2023-09-01 01:59:10,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3928 conditions, 611 events. 324/611 cut-off events. For 6147/6147 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2795 event pairs, 11 based on Foata normal form. 10/621 useless extension candidates. Maximal degree in co-relation 3888. Up to 187 conditions per place. [2023-09-01 01:59:10,865 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 118 selfloop transitions, 81 changer transitions 1/200 dead transitions. [2023-09-01 01:59:10,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 200 transitions, 2549 flow [2023-09-01 01:59:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 01:59:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 01:59:10,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3735 transitions. [2023-09-01 01:59:10,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263698630136986 [2023-09-01 01:59:10,870 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3735 transitions. [2023-09-01 01:59:10,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3735 transitions. [2023-09-01 01:59:10,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:10,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3735 transitions. [2023-09-01 01:59:10,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 186.75) internal successors, (3735), 20 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:10,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:10,882 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:10,882 INFO L175 Difference]: Start difference. First operand has 108 places, 104 transitions, 1248 flow. Second operand 20 states and 3735 transitions. [2023-09-01 01:59:10,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 200 transitions, 2549 flow [2023-09-01 01:59:10,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 200 transitions, 2351 flow, removed 62 selfloop flow, removed 4 redundant places. [2023-09-01 01:59:10,906 INFO L231 Difference]: Finished difference. Result has 130 places, 145 transitions, 2008 flow [2023-09-01 01:59:10,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2008, PETRI_PLACES=130, PETRI_TRANSITIONS=145} [2023-09-01 01:59:10,907 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 101 predicate places. [2023-09-01 01:59:10,907 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 145 transitions, 2008 flow [2023-09-01 01:59:10,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:10,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:10,908 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:10,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-09-01 01:59:11,112 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,SelfDestructingSolverStorable25 [2023-09-01 01:59:11,113 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:11,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:11,113 INFO L85 PathProgramCache]: Analyzing trace with hash 801128094, now seen corresponding path program 11 times [2023-09-01 01:59:11,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:11,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861833252] [2023-09-01 01:59:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:11,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:11,182 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 01:59:11,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:11,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861833252] [2023-09-01 01:59:11,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861833252] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:11,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052037802] [2023-09-01 01:59:11,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:59:11,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:11,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:11,184 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 01:59:11,211 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 01:59:11,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 01:59:11,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:11,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:11,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:11,320 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 01:59:11,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:11,356 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 01:59:11,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052037802] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:11,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:11,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 01:59:11,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561450971] [2023-09-01 01:59:11,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:11,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:59:11,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:11,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:59:11,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:59:11,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:11,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 145 transitions, 2008 flow. Second operand has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:11,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:11,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:11,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:11,702 INFO L130 PetriNetUnfolder]: 404/781 cut-off events. [2023-09-01 01:59:11,703 INFO L131 PetriNetUnfolder]: For 10078/10078 co-relation queries the response was YES. [2023-09-01 01:59:11,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5318 conditions, 781 events. 404/781 cut-off events. For 10078/10078 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3878 event pairs, 75 based on Foata normal form. 8/789 useless extension candidates. Maximal degree in co-relation 5272. Up to 331 conditions per place. [2023-09-01 01:59:11,713 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 163 selfloop transitions, 66 changer transitions 0/229 dead transitions. [2023-09-01 01:59:11,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 229 transitions, 3433 flow [2023-09-01 01:59:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 01:59:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 01:59:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2444 transitions. [2023-09-01 01:59:11,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292237442922374 [2023-09-01 01:59:11,717 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2444 transitions. [2023-09-01 01:59:11,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2444 transitions. [2023-09-01 01:59:11,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:11,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2444 transitions. [2023-09-01 01:59:11,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.0) internal successors, (2444), 13 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:11,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 438.0) internal successors, (6132), 14 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:11,725 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 438.0) internal successors, (6132), 14 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:11,725 INFO L175 Difference]: Start difference. First operand has 130 places, 145 transitions, 2008 flow. Second operand 13 states and 2444 transitions. [2023-09-01 01:59:11,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 229 transitions, 3433 flow [2023-09-01 01:59:11,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 229 transitions, 2646 flow, removed 358 selfloop flow, removed 6 redundant places. [2023-09-01 01:59:11,777 INFO L231 Difference]: Finished difference. Result has 142 places, 164 transitions, 2018 flow [2023-09-01 01:59:11,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2018, PETRI_PLACES=142, PETRI_TRANSITIONS=164} [2023-09-01 01:59:11,778 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 113 predicate places. [2023-09-01 01:59:11,778 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 164 transitions, 2018 flow [2023-09-01 01:59:11,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:11,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:11,779 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:11,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:11,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 01:59:11,984 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:11,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:11,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1824853525, now seen corresponding path program 12 times [2023-09-01 01:59:11,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:11,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984108942] [2023-09-01 01:59:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:11,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:12,072 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 01:59:12,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:12,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984108942] [2023-09-01 01:59:12,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984108942] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:12,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732583949] [2023-09-01 01:59:12,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 01:59:12,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:12,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:12,075 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:12,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 01:59:12,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 01:59:12,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:12,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:12,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:12,214 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 01:59:12,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:12,243 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 01:59:12,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732583949] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:12,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:12,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 01:59:12,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833387975] [2023-09-01 01:59:12,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:12,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:59:12,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:12,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:59:12,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:59:12,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:12,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 164 transitions, 2018 flow. Second operand has 12 states, 12 states have (on average 183.08333333333334) internal successors, (2197), 12 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:12,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:12,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:12,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:12,616 INFO L130 PetriNetUnfolder]: 400/771 cut-off events. [2023-09-01 01:59:12,616 INFO L131 PetriNetUnfolder]: For 6358/6358 co-relation queries the response was YES. [2023-09-01 01:59:12,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4606 conditions, 771 events. 400/771 cut-off events. For 6358/6358 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3850 event pairs, 27 based on Foata normal form. 34/803 useless extension candidates. Maximal degree in co-relation 4556. Up to 446 conditions per place. [2023-09-01 01:59:12,625 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 137 selfloop transitions, 69 changer transitions 0/206 dead transitions. [2023-09-01 01:59:12,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 206 transitions, 2682 flow [2023-09-01 01:59:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 01:59:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 01:59:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2622 transitions. [2023-09-01 01:59:12,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42759295499021527 [2023-09-01 01:59:12,629 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2622 transitions. [2023-09-01 01:59:12,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2622 transitions. [2023-09-01 01:59:12,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:12,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2622 transitions. [2023-09-01 01:59:12,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 187.28571428571428) internal successors, (2622), 14 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:12,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:12,663 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:12,663 INFO L175 Difference]: Start difference. First operand has 142 places, 164 transitions, 2018 flow. Second operand 14 states and 2622 transitions. [2023-09-01 01:59:12,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 206 transitions, 2682 flow [2023-09-01 01:59:12,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 206 transitions, 2535 flow, removed 59 selfloop flow, removed 6 redundant places. [2023-09-01 01:59:12,696 INFO L231 Difference]: Finished difference. Result has 149 places, 163 transitions, 2072 flow [2023-09-01 01:59:12,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=1825, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2072, PETRI_PLACES=149, PETRI_TRANSITIONS=163} [2023-09-01 01:59:12,700 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 120 predicate places. [2023-09-01 01:59:12,700 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 163 transitions, 2072 flow [2023-09-01 01:59:12,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.08333333333334) internal successors, (2197), 12 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:12,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:12,701 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:12,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:12,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 01:59:12,908 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:12,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:12,908 INFO L85 PathProgramCache]: Analyzing trace with hash 810642430, now seen corresponding path program 13 times [2023-09-01 01:59:12,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:12,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092737405] [2023-09-01 01:59:12,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:12,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:12,969 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 01:59:12,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:12,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092737405] [2023-09-01 01:59:12,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092737405] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:12,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638885896] [2023-09-01 01:59:12,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 01:59:12,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:12,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:12,971 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:12,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 01:59:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:13,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:13,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:13,110 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 01:59:13,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:13,133 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 01:59:13,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638885896] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:13,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:13,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 01:59:13,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597422263] [2023-09-01 01:59:13,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:13,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:59:13,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:13,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:59:13,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:59:13,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:13,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 163 transitions, 2072 flow. Second operand has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:13,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:13,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:13,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:13,570 INFO L130 PetriNetUnfolder]: 389/754 cut-off events. [2023-09-01 01:59:13,571 INFO L131 PetriNetUnfolder]: For 6398/6398 co-relation queries the response was YES. [2023-09-01 01:59:13,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4568 conditions, 754 events. 389/754 cut-off events. For 6398/6398 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3742 event pairs, 56 based on Foata normal form. 16/768 useless extension candidates. Maximal degree in co-relation 4518. Up to 264 conditions per place. [2023-09-01 01:59:13,580 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 146 selfloop transitions, 79 changer transitions 2/227 dead transitions. [2023-09-01 01:59:13,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 227 transitions, 2922 flow [2023-09-01 01:59:13,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 01:59:13,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 01:59:13,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3361 transitions. [2023-09-01 01:59:13,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263064434297311 [2023-09-01 01:59:13,588 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3361 transitions. [2023-09-01 01:59:13,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3361 transitions. [2023-09-01 01:59:13,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:13,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3361 transitions. [2023-09-01 01:59:13,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 186.72222222222223) internal successors, (3361), 18 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:13,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:13,601 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:13,601 INFO L175 Difference]: Start difference. First operand has 149 places, 163 transitions, 2072 flow. Second operand 18 states and 3361 transitions. [2023-09-01 01:59:13,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 227 transitions, 2922 flow [2023-09-01 01:59:13,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 227 transitions, 2811 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-09-01 01:59:13,637 INFO L231 Difference]: Finished difference. Result has 159 places, 166 transitions, 2182 flow [2023-09-01 01:59:13,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=1910, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2182, PETRI_PLACES=159, PETRI_TRANSITIONS=166} [2023-09-01 01:59:13,640 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 130 predicate places. [2023-09-01 01:59:13,640 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 166 transitions, 2182 flow [2023-09-01 01:59:13,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:13,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:13,641 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:13,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:13,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 01:59:13,846 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:13,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:13,847 INFO L85 PathProgramCache]: Analyzing trace with hash -59756659, now seen corresponding path program 14 times [2023-09-01 01:59:13,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:13,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600118697] [2023-09-01 01:59:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:13,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:13,917 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 01:59:13,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:13,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600118697] [2023-09-01 01:59:13,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600118697] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:13,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39244208] [2023-09-01 01:59:13,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:59:13,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:13,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:13,921 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:13,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 01:59:14,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:59:14,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:14,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:14,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:14,064 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 01:59:14,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:14,088 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 01:59:14,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39244208] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:14,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:14,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-09-01 01:59:14,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575341387] [2023-09-01 01:59:14,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:14,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:59:14,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:14,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:59:14,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:59:14,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:14,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 166 transitions, 2182 flow. Second operand has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:14,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:14,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:14,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:14,516 INFO L130 PetriNetUnfolder]: 564/1111 cut-off events. [2023-09-01 01:59:14,516 INFO L131 PetriNetUnfolder]: For 10671/10671 co-relation queries the response was YES. [2023-09-01 01:59:14,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6923 conditions, 1111 events. 564/1111 cut-off events. For 10671/10671 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6256 event pairs, 23 based on Foata normal form. 18/1127 useless extension candidates. Maximal degree in co-relation 6872. Up to 406 conditions per place. [2023-09-01 01:59:14,527 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 167 selfloop transitions, 120 changer transitions 0/287 dead transitions. [2023-09-01 01:59:14,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 287 transitions, 4061 flow [2023-09-01 01:59:14,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 01:59:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 01:59:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2817 transitions. [2023-09-01 01:59:14,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42876712328767125 [2023-09-01 01:59:14,532 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2817 transitions. [2023-09-01 01:59:14,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2817 transitions. [2023-09-01 01:59:14,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:14,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2817 transitions. [2023-09-01 01:59:14,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 187.8) internal successors, (2817), 15 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:14,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 438.0) internal successors, (7008), 16 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:14,540 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 438.0) internal successors, (7008), 16 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:14,540 INFO L175 Difference]: Start difference. First operand has 159 places, 166 transitions, 2182 flow. Second operand 15 states and 2817 transitions. [2023-09-01 01:59:14,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 287 transitions, 4061 flow [2023-09-01 01:59:14,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 287 transitions, 3806 flow, removed 82 selfloop flow, removed 11 redundant places. [2023-09-01 01:59:14,591 INFO L231 Difference]: Finished difference. Result has 167 places, 215 transitions, 3154 flow [2023-09-01 01:59:14,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3154, PETRI_PLACES=167, PETRI_TRANSITIONS=215} [2023-09-01 01:59:14,592 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 138 predicate places. [2023-09-01 01:59:14,592 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 215 transitions, 3154 flow [2023-09-01 01:59:14,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:14,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:14,593 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:14,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:14,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:14,798 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:14,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:14,799 INFO L85 PathProgramCache]: Analyzing trace with hash -50242323, now seen corresponding path program 15 times [2023-09-01 01:59:14,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:14,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033315949] [2023-09-01 01:59:14,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:14,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:14,870 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 01:59:14,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:14,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033315949] [2023-09-01 01:59:14,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033315949] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:14,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074174402] [2023-09-01 01:59:14,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:59:14,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:14,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:14,873 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:14,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 01:59:14,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 01:59:14,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:14,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:14,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:15,013 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 01:59:15,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:59:15,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074174402] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:15,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:15,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-09-01 01:59:15,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712089127] [2023-09-01 01:59:15,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:15,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:59:15,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:15,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:59:15,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:59:15,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:15,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 215 transitions, 3154 flow. Second operand has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:15,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:15,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:15,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:15,590 INFO L130 PetriNetUnfolder]: 566/1133 cut-off events. [2023-09-01 01:59:15,591 INFO L131 PetriNetUnfolder]: For 12600/12600 co-relation queries the response was YES. [2023-09-01 01:59:15,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7417 conditions, 1133 events. 566/1133 cut-off events. For 12600/12600 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6491 event pairs, 23 based on Foata normal form. 6/1139 useless extension candidates. Maximal degree in co-relation 7360. Up to 342 conditions per place. [2023-09-01 01:59:15,600 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 155 selfloop transitions, 127 changer transitions 2/284 dead transitions. [2023-09-01 01:59:15,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 284 transitions, 4225 flow [2023-09-01 01:59:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 01:59:15,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 01:59:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3909 transitions. [2023-09-01 01:59:15,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249836921069798 [2023-09-01 01:59:15,605 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3909 transitions. [2023-09-01 01:59:15,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3909 transitions. [2023-09-01 01:59:15,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:15,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3909 transitions. [2023-09-01 01:59:15,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 186.14285714285714) internal successors, (3909), 21 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:15,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:15,617 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:15,617 INFO L175 Difference]: Start difference. First operand has 167 places, 215 transitions, 3154 flow. Second operand 21 states and 3909 transitions. [2023-09-01 01:59:15,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 284 transitions, 4225 flow [2023-09-01 01:59:15,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 284 transitions, 4088 flow, removed 49 selfloop flow, removed 5 redundant places. [2023-09-01 01:59:15,688 INFO L231 Difference]: Finished difference. Result has 184 places, 221 transitions, 3391 flow [2023-09-01 01:59:15,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=2954, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3391, PETRI_PLACES=184, PETRI_TRANSITIONS=221} [2023-09-01 01:59:15,689 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2023-09-01 01:59:15,689 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 221 transitions, 3391 flow [2023-09-01 01:59:15,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:15,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:15,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:15,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-09-01 01:59:15,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:15,893 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:15,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:15,893 INFO L85 PathProgramCache]: Analyzing trace with hash 244702093, now seen corresponding path program 16 times [2023-09-01 01:59:15,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:15,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864818809] [2023-09-01 01:59:15,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:15,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:15,961 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 01:59:15,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:15,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864818809] [2023-09-01 01:59:15,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864818809] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:15,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557855174] [2023-09-01 01:59:15,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:59:15,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:15,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:15,963 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:15,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 01:59:16,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:59:16,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:16,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:16,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:16,113 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 01:59:16,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:16,148 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 01:59:16,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557855174] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:16,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:16,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 01:59:16,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840262012] [2023-09-01 01:59:16,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:16,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 01:59:16,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 01:59:16,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-09-01 01:59:16,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:16,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 221 transitions, 3391 flow. Second operand has 15 states, 15 states have (on average 182.73333333333332) internal successors, (2741), 15 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:16,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:16,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:16,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:16,732 INFO L130 PetriNetUnfolder]: 629/1260 cut-off events. [2023-09-01 01:59:16,732 INFO L131 PetriNetUnfolder]: For 14729/14729 co-relation queries the response was YES. [2023-09-01 01:59:16,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8607 conditions, 1260 events. 629/1260 cut-off events. For 14729/14729 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7390 event pairs, 25 based on Foata normal form. 6/1266 useless extension candidates. Maximal degree in co-relation 8548. Up to 359 conditions per place. [2023-09-01 01:59:16,749 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 152 selfloop transitions, 141 changer transitions 4/297 dead transitions. [2023-09-01 01:59:16,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 297 transitions, 4781 flow [2023-09-01 01:59:16,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 01:59:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 01:59:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3718 transitions. [2023-09-01 01:59:16,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42442922374429226 [2023-09-01 01:59:16,757 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3718 transitions. [2023-09-01 01:59:16,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3718 transitions. [2023-09-01 01:59:16,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:16,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3718 transitions. [2023-09-01 01:59:16,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 185.9) internal successors, (3718), 20 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:16,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:16,769 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:16,769 INFO L175 Difference]: Start difference. First operand has 184 places, 221 transitions, 3391 flow. Second operand 20 states and 3718 transitions. [2023-09-01 01:59:16,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 297 transitions, 4781 flow [2023-09-01 01:59:16,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 297 transitions, 4502 flow, removed 105 selfloop flow, removed 7 redundant places. [2023-09-01 01:59:16,840 INFO L231 Difference]: Finished difference. Result has 201 places, 244 transitions, 4046 flow [2023-09-01 01:59:16,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=3191, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4046, PETRI_PLACES=201, PETRI_TRANSITIONS=244} [2023-09-01 01:59:16,841 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 172 predicate places. [2023-09-01 01:59:16,841 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 244 transitions, 4046 flow [2023-09-01 01:59:16,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.73333333333332) internal successors, (2741), 15 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:16,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:16,841 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:16,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:17,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:17,043 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:17,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:17,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1495872819, now seen corresponding path program 17 times [2023-09-01 01:59:17,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:17,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727505707] [2023-09-01 01:59:17,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:17,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:17,116 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 01:59:17,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:17,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727505707] [2023-09-01 01:59:17,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727505707] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:17,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747923601] [2023-09-01 01:59:17,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:59:17,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:17,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:17,118 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:17,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 01:59:17,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 01:59:17,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:17,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:17,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:17,260 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 01:59:17,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:17,298 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 01:59:17,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747923601] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:17,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:17,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 01:59:17,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622527661] [2023-09-01 01:59:17,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:17,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 01:59:17,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:17,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 01:59:17,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-09-01 01:59:17,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:17,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 244 transitions, 4046 flow. Second operand has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:17,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:17,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:17,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:17,896 INFO L130 PetriNetUnfolder]: 701/1404 cut-off events. [2023-09-01 01:59:17,896 INFO L131 PetriNetUnfolder]: For 21021/21021 co-relation queries the response was YES. [2023-09-01 01:59:17,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10120 conditions, 1404 events. 701/1404 cut-off events. For 21021/21021 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 8478 event pairs, 220 based on Foata normal form. 36/1440 useless extension candidates. Maximal degree in co-relation 10056. Up to 1158 conditions per place. [2023-09-01 01:59:17,911 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 262 selfloop transitions, 58 changer transitions 1/321 dead transitions. [2023-09-01 01:59:17,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 321 transitions, 5677 flow [2023-09-01 01:59:17,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 01:59:17,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 01:59:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2445 transitions. [2023-09-01 01:59:17,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4293993677555321 [2023-09-01 01:59:17,915 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2445 transitions. [2023-09-01 01:59:17,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2445 transitions. [2023-09-01 01:59:17,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:17,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2445 transitions. [2023-09-01 01:59:17,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.07692307692307) internal successors, (2445), 13 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:17,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 438.0) internal successors, (6132), 14 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:17,926 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 438.0) internal successors, (6132), 14 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:17,926 INFO L175 Difference]: Start difference. First operand has 201 places, 244 transitions, 4046 flow. Second operand 13 states and 2445 transitions. [2023-09-01 01:59:17,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 321 transitions, 5677 flow [2023-09-01 01:59:18,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 321 transitions, 5531 flow, removed 35 selfloop flow, removed 7 redundant places. [2023-09-01 01:59:18,100 INFO L231 Difference]: Finished difference. Result has 212 places, 269 transitions, 4671 flow [2023-09-01 01:59:18,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=3900, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4671, PETRI_PLACES=212, PETRI_TRANSITIONS=269} [2023-09-01 01:59:18,101 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 183 predicate places. [2023-09-01 01:59:18,101 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 269 transitions, 4671 flow [2023-09-01 01:59:18,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:18,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:18,102 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:18,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:18,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:18,307 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:18,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:18,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1835640755, now seen corresponding path program 18 times [2023-09-01 01:59:18,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:18,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650229136] [2023-09-01 01:59:18,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:18,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:18,373 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 01:59:18,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:18,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650229136] [2023-09-01 01:59:18,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650229136] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:18,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230001231] [2023-09-01 01:59:18,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 01:59:18,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:18,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:18,376 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:18,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 01:59:18,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 01:59:18,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:18,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:18,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:18,520 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 01:59:18,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:18,546 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 01:59:18,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230001231] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:18,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:18,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-09-01 01:59:18,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551417940] [2023-09-01 01:59:18,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:18,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:59:18,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:18,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:59:18,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:59:18,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:18,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 269 transitions, 4671 flow. Second operand has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:18,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:18,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:18,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:19,109 INFO L130 PetriNetUnfolder]: 735/1492 cut-off events. [2023-09-01 01:59:19,109 INFO L131 PetriNetUnfolder]: For 27399/27399 co-relation queries the response was YES. [2023-09-01 01:59:19,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11488 conditions, 1492 events. 735/1492 cut-off events. For 27399/27399 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9319 event pairs, 87 based on Foata normal form. 6/1498 useless extension candidates. Maximal degree in co-relation 11416. Up to 379 conditions per place. [2023-09-01 01:59:19,122 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 187 selfloop transitions, 144 changer transitions 5/336 dead transitions. [2023-09-01 01:59:19,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 336 transitions, 6122 flow [2023-09-01 01:59:19,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 01:59:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 01:59:19,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3349 transitions. [2023-09-01 01:59:19,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247843734145104 [2023-09-01 01:59:19,126 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3349 transitions. [2023-09-01 01:59:19,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3349 transitions. [2023-09-01 01:59:19,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:19,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3349 transitions. [2023-09-01 01:59:19,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 186.05555555555554) internal successors, (3349), 18 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:19,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:19,136 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:19,136 INFO L175 Difference]: Start difference. First operand has 212 places, 269 transitions, 4671 flow. Second operand 18 states and 3349 transitions. [2023-09-01 01:59:19,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 336 transitions, 6122 flow [2023-09-01 01:59:19,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 336 transitions, 5670 flow, removed 205 selfloop flow, removed 4 redundant places. [2023-09-01 01:59:19,318 INFO L231 Difference]: Finished difference. Result has 230 places, 283 transitions, 5005 flow [2023-09-01 01:59:19,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=4289, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5005, PETRI_PLACES=230, PETRI_TRANSITIONS=283} [2023-09-01 01:59:19,319 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 201 predicate places. [2023-09-01 01:59:19,319 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 283 transitions, 5005 flow [2023-09-01 01:59:19,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:19,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:19,320 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:19,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:19,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:19,525 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:19,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:19,526 INFO L85 PathProgramCache]: Analyzing trace with hash 119414706, now seen corresponding path program 19 times [2023-09-01 01:59:19,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:19,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692679519] [2023-09-01 01:59:19,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:19,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:19,596 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 01:59:19,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:19,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692679519] [2023-09-01 01:59:19,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692679519] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:19,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820445294] [2023-09-01 01:59:19,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 01:59:19,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:19,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:19,601 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:19,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 01:59:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:19,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:19,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:19,728 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 01:59:19,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:19,763 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 01:59:19,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820445294] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:19,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:19,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-09-01 01:59:19,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143269220] [2023-09-01 01:59:19,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:19,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:59:19,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:19,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:59:19,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:59:19,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:19,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 283 transitions, 5005 flow. Second operand has 13 states, 13 states have (on average 183.0) internal successors, (2379), 13 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:19,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:19,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:19,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:20,413 INFO L130 PetriNetUnfolder]: 875/1790 cut-off events. [2023-09-01 01:59:20,414 INFO L131 PetriNetUnfolder]: For 37031/37031 co-relation queries the response was YES. [2023-09-01 01:59:20,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14270 conditions, 1790 events. 875/1790 cut-off events. For 37031/37031 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 11693 event pairs, 54 based on Foata normal form. 10/1800 useless extension candidates. Maximal degree in co-relation 14193. Up to 1185 conditions per place. [2023-09-01 01:59:20,435 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 299 selfloop transitions, 102 changer transitions 0/401 dead transitions. [2023-09-01 01:59:20,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 401 transitions, 7620 flow [2023-09-01 01:59:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 01:59:20,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 01:59:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2818 transitions. [2023-09-01 01:59:20,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289193302891933 [2023-09-01 01:59:20,439 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2818 transitions. [2023-09-01 01:59:20,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2818 transitions. [2023-09-01 01:59:20,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:20,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2818 transitions. [2023-09-01 01:59:20,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 187.86666666666667) internal successors, (2818), 15 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:20,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 438.0) internal successors, (7008), 16 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:20,447 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 438.0) internal successors, (7008), 16 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:20,448 INFO L175 Difference]: Start difference. First operand has 230 places, 283 transitions, 5005 flow. Second operand 15 states and 2818 transitions. [2023-09-01 01:59:20,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 401 transitions, 7620 flow [2023-09-01 01:59:20,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 401 transitions, 7328 flow, removed 124 selfloop flow, removed 4 redundant places. [2023-09-01 01:59:20,658 INFO L231 Difference]: Finished difference. Result has 245 places, 327 transitions, 6058 flow [2023-09-01 01:59:20,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=4825, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6058, PETRI_PLACES=245, PETRI_TRANSITIONS=327} [2023-09-01 01:59:20,659 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 216 predicate places. [2023-09-01 01:59:20,660 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 327 transitions, 6058 flow [2023-09-01 01:59:20,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 183.0) internal successors, (2379), 13 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:20,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:20,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:20,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:20,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-09-01 01:59:20,865 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:20,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:20,865 INFO L85 PathProgramCache]: Analyzing trace with hash 481739322, now seen corresponding path program 20 times [2023-09-01 01:59:20,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:20,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856534160] [2023-09-01 01:59:20,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:20,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:20,931 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 01:59:20,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:20,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856534160] [2023-09-01 01:59:20,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856534160] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:20,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223096299] [2023-09-01 01:59:20,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:59:20,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:20,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:20,934 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:20,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 01:59:21,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:59:21,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:21,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:21,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:21,083 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 01:59:21,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:21,116 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 01:59:21,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223096299] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:21,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:21,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-09-01 01:59:21,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826530982] [2023-09-01 01:59:21,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:21,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:59:21,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:21,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:59:21,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:59:21,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:21,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 327 transitions, 6058 flow. Second operand has 13 states, 13 states have (on average 183.07692307692307) internal successors, (2380), 13 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:21,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:21,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:21,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:21,853 INFO L130 PetriNetUnfolder]: 926/1897 cut-off events. [2023-09-01 01:59:21,854 INFO L131 PetriNetUnfolder]: For 43347/43347 co-relation queries the response was YES. [2023-09-01 01:59:21,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15614 conditions, 1897 events. 926/1897 cut-off events. For 43347/43347 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 12649 event pairs, 40 based on Foata normal form. 16/1913 useless extension candidates. Maximal degree in co-relation 15531. Up to 932 conditions per place. [2023-09-01 01:59:21,877 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 279 selfloop transitions, 129 changer transitions 1/409 dead transitions. [2023-09-01 01:59:21,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 409 transitions, 8137 flow [2023-09-01 01:59:21,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 01:59:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 01:59:21,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3905 transitions. [2023-09-01 01:59:21,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42454881495977387 [2023-09-01 01:59:21,883 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3905 transitions. [2023-09-01 01:59:21,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3905 transitions. [2023-09-01 01:59:21,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:21,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3905 transitions. [2023-09-01 01:59:21,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 185.95238095238096) internal successors, (3905), 21 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:21,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:21,897 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:21,897 INFO L175 Difference]: Start difference. First operand has 245 places, 327 transitions, 6058 flow. Second operand 21 states and 3905 transitions. [2023-09-01 01:59:21,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 409 transitions, 8137 flow [2023-09-01 01:59:22,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 409 transitions, 7601 flow, removed 173 selfloop flow, removed 8 redundant places. [2023-09-01 01:59:22,153 INFO L231 Difference]: Finished difference. Result has 266 places, 356 transitions, 6760 flow [2023-09-01 01:59:22,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6760, PETRI_PLACES=266, PETRI_TRANSITIONS=356} [2023-09-01 01:59:22,153 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 237 predicate places. [2023-09-01 01:59:22,153 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 356 transitions, 6760 flow [2023-09-01 01:59:22,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 183.07692307692307) internal successors, (2380), 13 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:22,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:22,154 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:22,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:22,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-09-01 01:59:22,359 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:22,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:22,360 INFO L85 PathProgramCache]: Analyzing trace with hash -881269082, now seen corresponding path program 21 times [2023-09-01 01:59:22,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:22,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36565015] [2023-09-01 01:59:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:22,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:22,432 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 01:59:22,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:22,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36565015] [2023-09-01 01:59:22,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36565015] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:22,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367600280] [2023-09-01 01:59:22,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:59:22,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:22,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:22,435 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:22,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 01:59:22,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 01:59:22,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:22,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:22,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:22,572 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 01:59:22,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:59:22,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367600280] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:22,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:22,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-09-01 01:59:22,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122020839] [2023-09-01 01:59:22,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:22,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:59:22,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:22,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:59:22,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:59:22,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:22,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 356 transitions, 6760 flow. Second operand has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:22,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:22,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:22,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:23,268 INFO L130 PetriNetUnfolder]: 909/1876 cut-off events. [2023-09-01 01:59:23,268 INFO L131 PetriNetUnfolder]: For 44600/44600 co-relation queries the response was YES. [2023-09-01 01:59:23,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15618 conditions, 1876 events. 909/1876 cut-off events. For 44600/44600 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 12556 event pairs, 30 based on Foata normal form. 16/1892 useless extension candidates. Maximal degree in co-relation 15527. Up to 736 conditions per place. [2023-09-01 01:59:23,290 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 281 selfloop transitions, 158 changer transitions 1/440 dead transitions. [2023-09-01 01:59:23,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 440 transitions, 8531 flow [2023-09-01 01:59:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 01:59:23,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 01:59:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3928 transitions. [2023-09-01 01:59:23,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42704935855620785 [2023-09-01 01:59:23,297 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3928 transitions. [2023-09-01 01:59:23,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3928 transitions. [2023-09-01 01:59:23,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:23,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3928 transitions. [2023-09-01 01:59:23,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 187.04761904761904) internal successors, (3928), 21 states have internal predecessors, (3928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:23,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:23,307 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:23,307 INFO L175 Difference]: Start difference. First operand has 266 places, 356 transitions, 6760 flow. Second operand 21 states and 3928 transitions. [2023-09-01 01:59:23,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 440 transitions, 8531 flow [2023-09-01 01:59:23,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 440 transitions, 8208 flow, removed 122 selfloop flow, removed 10 redundant places. [2023-09-01 01:59:23,660 INFO L231 Difference]: Finished difference. Result has 280 places, 365 transitions, 7138 flow [2023-09-01 01:59:23,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=6334, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7138, PETRI_PLACES=280, PETRI_TRANSITIONS=365} [2023-09-01 01:59:23,661 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 251 predicate places. [2023-09-01 01:59:23,661 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 365 transitions, 7138 flow [2023-09-01 01:59:23,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:23,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:23,662 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:23,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:23,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-09-01 01:59:23,867 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:23,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:23,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1859052538, now seen corresponding path program 22 times [2023-09-01 01:59:23,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:23,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107514064] [2023-09-01 01:59:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:23,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:23,959 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 01:59:23,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:23,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107514064] [2023-09-01 01:59:23,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107514064] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:23,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972027209] [2023-09-01 01:59:23,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:59:23,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:23,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:23,961 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:23,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 01:59:24,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:59:24,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:24,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:24,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:24,087 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 01:59:24,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:24,116 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 01:59:24,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972027209] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:24,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:24,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 01:59:24,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133775753] [2023-09-01 01:59:24,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:24,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 01:59:24,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:24,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 01:59:24,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-09-01 01:59:24,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:24,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 365 transitions, 7138 flow. Second operand has 15 states, 15 states have (on average 183.0) internal successors, (2745), 15 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:24,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:24,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:24,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:24,855 INFO L130 PetriNetUnfolder]: 926/1921 cut-off events. [2023-09-01 01:59:24,855 INFO L131 PetriNetUnfolder]: For 49114/49114 co-relation queries the response was YES. [2023-09-01 01:59:24,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16585 conditions, 1921 events. 926/1921 cut-off events. For 49114/49114 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 12977 event pairs, 32 based on Foata normal form. 16/1937 useless extension candidates. Maximal degree in co-relation 16493. Up to 797 conditions per place. [2023-09-01 01:59:24,875 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 268 selfloop transitions, 170 changer transitions 5/443 dead transitions. [2023-09-01 01:59:24,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 443 transitions, 8964 flow [2023-09-01 01:59:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 01:59:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 01:59:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4284 transitions. [2023-09-01 01:59:24,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252531268612269 [2023-09-01 01:59:24,880 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4284 transitions. [2023-09-01 01:59:24,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4284 transitions. [2023-09-01 01:59:24,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:24,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4284 transitions. [2023-09-01 01:59:24,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 186.2608695652174) internal successors, (4284), 23 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:24,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 438.0) internal successors, (10512), 24 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:24,891 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 438.0) internal successors, (10512), 24 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:24,891 INFO L175 Difference]: Start difference. First operand has 280 places, 365 transitions, 7138 flow. Second operand 23 states and 4284 transitions. [2023-09-01 01:59:24,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 443 transitions, 8964 flow [2023-09-01 01:59:25,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 443 transitions, 8493 flow, removed 195 selfloop flow, removed 9 redundant places. [2023-09-01 01:59:25,192 INFO L231 Difference]: Finished difference. Result has 298 places, 376 transitions, 7633 flow [2023-09-01 01:59:25,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=6755, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7633, PETRI_PLACES=298, PETRI_TRANSITIONS=376} [2023-09-01 01:59:25,193 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 269 predicate places. [2023-09-01 01:59:25,193 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 376 transitions, 7633 flow [2023-09-01 01:59:25,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 183.0) internal successors, (2745), 15 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:25,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:25,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:25,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:25,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:25,394 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:25,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:25,395 INFO L85 PathProgramCache]: Analyzing trace with hash -574540519, now seen corresponding path program 23 times [2023-09-01 01:59:25,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:25,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540192863] [2023-09-01 01:59:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:25,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:25,464 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 01:59:25,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:25,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540192863] [2023-09-01 01:59:25,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540192863] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:25,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300999387] [2023-09-01 01:59:25,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:59:25,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:25,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:25,467 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:25,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 01:59:25,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:59:25,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:25,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:25,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:25,603 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 01:59:25,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:59:25,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300999387] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:25,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:25,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-09-01 01:59:25,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524865809] [2023-09-01 01:59:25,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:25,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:59:25,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:25,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:59:25,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:59:25,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:25,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 376 transitions, 7633 flow. Second operand has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:25,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:25,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:25,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:26,427 INFO L130 PetriNetUnfolder]: 1053/2178 cut-off events. [2023-09-01 01:59:26,427 INFO L131 PetriNetUnfolder]: For 61695/61695 co-relation queries the response was YES. [2023-09-01 01:59:26,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19499 conditions, 2178 events. 1053/2178 cut-off events. For 61695/61695 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 15178 event pairs, 153 based on Foata normal form. 16/2194 useless extension candidates. Maximal degree in co-relation 19401. Up to 621 conditions per place. [2023-09-01 01:59:26,449 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 299 selfloop transitions, 174 changer transitions 2/475 dead transitions. [2023-09-01 01:59:26,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 475 transitions, 10418 flow [2023-09-01 01:59:26,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 01:59:26,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 01:59:26,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2983 transitions. [2023-09-01 01:59:26,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256563926940639 [2023-09-01 01:59:26,455 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2983 transitions. [2023-09-01 01:59:26,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2983 transitions. [2023-09-01 01:59:26,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:26,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2983 transitions. [2023-09-01 01:59:26,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 186.4375) internal successors, (2983), 16 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:26,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 438.0) internal successors, (7446), 17 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:26,463 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 438.0) internal successors, (7446), 17 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:26,463 INFO L175 Difference]: Start difference. First operand has 298 places, 376 transitions, 7633 flow. Second operand 16 states and 2983 transitions. [2023-09-01 01:59:26,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 475 transitions, 10418 flow [2023-09-01 01:59:26,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 475 transitions, 9844 flow, removed 203 selfloop flow, removed 11 redundant places. [2023-09-01 01:59:26,819 INFO L231 Difference]: Finished difference. Result has 308 places, 413 transitions, 8796 flow [2023-09-01 01:59:26,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=7112, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8796, PETRI_PLACES=308, PETRI_TRANSITIONS=413} [2023-09-01 01:59:26,820 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 279 predicate places. [2023-09-01 01:59:26,820 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 413 transitions, 8796 flow [2023-09-01 01:59:26,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:26,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:26,820 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:26,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:27,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-09-01 01:59:27,023 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:27,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:27,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1485921204, now seen corresponding path program 24 times [2023-09-01 01:59:27,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:27,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996743433] [2023-09-01 01:59:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:27,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:27,089 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 01:59:27,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:27,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996743433] [2023-09-01 01:59:27,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996743433] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:27,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942200212] [2023-09-01 01:59:27,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 01:59:27,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:27,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:27,093 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:27,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 01:59:27,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 01:59:27,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:27,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:27,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:27,228 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 01:59:27,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:27,259 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 01:59:27,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942200212] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:27,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:27,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-09-01 01:59:27,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961613007] [2023-09-01 01:59:27,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:27,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 01:59:27,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:27,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 01:59:27,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-09-01 01:59:27,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:27,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 413 transitions, 8796 flow. Second operand has 11 states, 11 states have (on average 183.0909090909091) internal successors, (2014), 11 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:27,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:27,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:27,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:27,906 INFO L130 PetriNetUnfolder]: 1084/2221 cut-off events. [2023-09-01 01:59:27,906 INFO L131 PetriNetUnfolder]: For 65458/65458 co-relation queries the response was YES. [2023-09-01 01:59:27,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20302 conditions, 2221 events. 1084/2221 cut-off events. For 65458/65458 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15338 event pairs, 44 based on Foata normal form. 16/2237 useless extension candidates. Maximal degree in co-relation 20199. Up to 1681 conditions per place. [2023-09-01 01:59:27,925 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 351 selfloop transitions, 104 changer transitions 0/455 dead transitions. [2023-09-01 01:59:27,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 455 transitions, 10367 flow [2023-09-01 01:59:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:59:27,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:59:27,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1314 transitions. [2023-09-01 01:59:27,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-09-01 01:59:27,927 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1314 transitions. [2023-09-01 01:59:27,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1314 transitions. [2023-09-01 01:59:27,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:27,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1314 transitions. [2023-09-01 01:59:27,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.71428571428572) internal successors, (1314), 7 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:27,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:27,929 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:27,929 INFO L175 Difference]: Start difference. First operand has 308 places, 413 transitions, 8796 flow. Second operand 7 states and 1314 transitions. [2023-09-01 01:59:27,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 455 transitions, 10367 flow [2023-09-01 01:59:28,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 455 transitions, 9894 flow, removed 186 selfloop flow, removed 7 redundant places. [2023-09-01 01:59:28,299 INFO L231 Difference]: Finished difference. Result has 308 places, 424 transitions, 8838 flow [2023-09-01 01:59:28,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=8229, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8838, PETRI_PLACES=308, PETRI_TRANSITIONS=424} [2023-09-01 01:59:28,300 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 279 predicate places. [2023-09-01 01:59:28,300 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 424 transitions, 8838 flow [2023-09-01 01:59:28,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 183.0909090909091) internal successors, (2014), 11 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:28,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:28,300 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:28,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:28,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-09-01 01:59:28,501 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:28,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:28,501 INFO L85 PathProgramCache]: Analyzing trace with hash 717663227, now seen corresponding path program 25 times [2023-09-01 01:59:28,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:28,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088896854] [2023-09-01 01:59:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:28,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:28,563 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 01:59:28,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:28,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088896854] [2023-09-01 01:59:28,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088896854] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:28,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600257130] [2023-09-01 01:59:28,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 01:59:28,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:28,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:28,564 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:28,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 01:59:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:28,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:28,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:28,677 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 01:59:28,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:28,699 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 01:59:28,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600257130] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:28,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:28,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-09-01 01:59:28,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822853272] [2023-09-01 01:59:28,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:28,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 01:59:28,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:28,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 01:59:28,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-09-01 01:59:28,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:28,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 424 transitions, 8838 flow. Second operand has 11 states, 11 states have (on average 183.0909090909091) internal successors, (2014), 11 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:28,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:28,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:28,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:29,335 INFO L130 PetriNetUnfolder]: 1080/2209 cut-off events. [2023-09-01 01:59:29,335 INFO L131 PetriNetUnfolder]: For 57907/57907 co-relation queries the response was YES. [2023-09-01 01:59:29,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19579 conditions, 2209 events. 1080/2209 cut-off events. For 57907/57907 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15257 event pairs, 209 based on Foata normal form. 2/2211 useless extension candidates. Maximal degree in co-relation 19475. Up to 1055 conditions per place. [2023-09-01 01:59:29,358 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 303 selfloop transitions, 139 changer transitions 5/447 dead transitions. [2023-09-01 01:59:29,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 447 transitions, 9899 flow [2023-09-01 01:59:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 01:59:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 01:59:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2045 transitions. [2023-09-01 01:59:29,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244499792444998 [2023-09-01 01:59:29,361 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2045 transitions. [2023-09-01 01:59:29,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2045 transitions. [2023-09-01 01:59:29,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:29,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2045 transitions. [2023-09-01 01:59:29,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 185.9090909090909) internal successors, (2045), 11 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:29,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:29,366 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:29,366 INFO L175 Difference]: Start difference. First operand has 308 places, 424 transitions, 8838 flow. Second operand 11 states and 2045 transitions. [2023-09-01 01:59:29,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 447 transitions, 9899 flow [2023-09-01 01:59:29,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 447 transitions, 9723 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-09-01 01:59:29,762 INFO L231 Difference]: Finished difference. Result has 313 places, 420 transitions, 8852 flow [2023-09-01 01:59:29,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=8641, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8852, PETRI_PLACES=313, PETRI_TRANSITIONS=420} [2023-09-01 01:59:29,763 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 284 predicate places. [2023-09-01 01:59:29,763 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 420 transitions, 8852 flow [2023-09-01 01:59:29,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 183.0909090909091) internal successors, (2014), 11 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:29,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:29,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:29,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-09-01 01:59:29,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:29,964 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:29,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:29,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1669212684, now seen corresponding path program 26 times [2023-09-01 01:59:29,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:29,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601835615] [2023-09-01 01:59:29,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:29,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:30,026 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 01:59:30,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:30,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601835615] [2023-09-01 01:59:30,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601835615] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:30,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276642051] [2023-09-01 01:59:30,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:59:30,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:30,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:30,029 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:30,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 01:59:30,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:59:30,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:30,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:30,170 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 01:59:30,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:30,202 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 01:59:30,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276642051] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:30,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:30,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-09-01 01:59:30,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11615013] [2023-09-01 01:59:30,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:30,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:59:30,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:30,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:59:30,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:59:30,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:30,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 420 transitions, 8852 flow. Second operand has 13 states, 13 states have (on average 183.07692307692307) internal successors, (2380), 13 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:30,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:30,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:30,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:30,920 INFO L130 PetriNetUnfolder]: 1114/2253 cut-off events. [2023-09-01 01:59:30,920 INFO L131 PetriNetUnfolder]: For 61609/61609 co-relation queries the response was YES. [2023-09-01 01:59:30,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20303 conditions, 2253 events. 1114/2253 cut-off events. For 61609/61609 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15393 event pairs, 80 based on Foata normal form. 16/2269 useless extension candidates. Maximal degree in co-relation 20201. Up to 1994 conditions per place. [2023-09-01 01:59:30,947 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 386 selfloop transitions, 74 changer transitions 0/460 dead transitions. [2023-09-01 01:59:30,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 460 transitions, 10347 flow [2023-09-01 01:59:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 01:59:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 01:59:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2049 transitions. [2023-09-01 01:59:30,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42528019925280197 [2023-09-01 01:59:30,949 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2049 transitions. [2023-09-01 01:59:30,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2049 transitions. [2023-09-01 01:59:30,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:30,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2049 transitions. [2023-09-01 01:59:30,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 186.27272727272728) internal successors, (2049), 11 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:30,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:30,954 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:30,954 INFO L175 Difference]: Start difference. First operand has 313 places, 420 transitions, 8852 flow. Second operand 11 states and 2049 transitions. [2023-09-01 01:59:30,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 460 transitions, 10347 flow [2023-09-01 01:59:31,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 460 transitions, 10070 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-09-01 01:59:31,418 INFO L231 Difference]: Finished difference. Result has 312 places, 437 transitions, 9116 flow [2023-09-01 01:59:31,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=8466, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9116, PETRI_PLACES=312, PETRI_TRANSITIONS=437} [2023-09-01 01:59:31,419 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 283 predicate places. [2023-09-01 01:59:31,419 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 437 transitions, 9116 flow [2023-09-01 01:59:31,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 183.07692307692307) internal successors, (2380), 13 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:31,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:31,420 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:31,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:31,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:31,624 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:31,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:31,625 INFO L85 PathProgramCache]: Analyzing trace with hash -973883700, now seen corresponding path program 27 times [2023-09-01 01:59:31,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:31,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807185184] [2023-09-01 01:59:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:31,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:31,685 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 01:59:31,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:31,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807185184] [2023-09-01 01:59:31,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807185184] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:31,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110915913] [2023-09-01 01:59:31,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:59:31,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:31,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:31,686 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:31,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 01:59:31,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 01:59:31,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:31,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:31,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:31,808 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 01:59:31,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:31,829 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 01:59:31,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110915913] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:31,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:31,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 01:59:31,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858026465] [2023-09-01 01:59:31,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:31,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:59:31,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:31,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:59:31,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:59:31,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:31,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 437 transitions, 9116 flow. Second operand has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:31,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:31,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:31,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:32,657 INFO L130 PetriNetUnfolder]: 1144/2309 cut-off events. [2023-09-01 01:59:32,657 INFO L131 PetriNetUnfolder]: For 61387/61387 co-relation queries the response was YES. [2023-09-01 01:59:32,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20755 conditions, 2309 events. 1144/2309 cut-off events. For 61387/61387 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 15845 event pairs, 38 based on Foata normal form. 8/2317 useless extension candidates. Maximal degree in co-relation 20649. Up to 990 conditions per place. [2023-09-01 01:59:32,684 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 302 selfloop transitions, 202 changer transitions 4/508 dead transitions. [2023-09-01 01:59:32,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 508 transitions, 11073 flow [2023-09-01 01:59:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 01:59:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 01:59:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3721 transitions. [2023-09-01 01:59:32,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247716894977169 [2023-09-01 01:59:32,687 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3721 transitions. [2023-09-01 01:59:32,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3721 transitions. [2023-09-01 01:59:32,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:32,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3721 transitions. [2023-09-01 01:59:32,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 186.05) internal successors, (3721), 20 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:32,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:32,695 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:32,695 INFO L175 Difference]: Start difference. First operand has 312 places, 437 transitions, 9116 flow. Second operand 20 states and 3721 transitions. [2023-09-01 01:59:32,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 508 transitions, 11073 flow [2023-09-01 01:59:33,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 508 transitions, 10905 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-09-01 01:59:33,165 INFO L231 Difference]: Finished difference. Result has 330 places, 450 transitions, 9930 flow [2023-09-01 01:59:33,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=8910, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9930, PETRI_PLACES=330, PETRI_TRANSITIONS=450} [2023-09-01 01:59:33,166 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 301 predicate places. [2023-09-01 01:59:33,166 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 450 transitions, 9930 flow [2023-09-01 01:59:33,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:33,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:33,167 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:33,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:33,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-09-01 01:59:33,372 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:33,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash -823420366, now seen corresponding path program 28 times [2023-09-01 01:59:33,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:33,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050105154] [2023-09-01 01:59:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:33,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:33,436 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 01:59:33,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:33,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050105154] [2023-09-01 01:59:33,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050105154] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:33,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711975434] [2023-09-01 01:59:33,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:59:33,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:33,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:33,441 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:33,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 01:59:33,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:59:33,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:33,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:33,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:33,597 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 01:59:33,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:33,629 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 01:59:33,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711975434] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:33,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:33,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 01:59:33,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750254379] [2023-09-01 01:59:33,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:33,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:59:33,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:33,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:59:33,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:59:33,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:33,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 450 transitions, 9930 flow. Second operand has 12 states, 12 states have (on average 183.08333333333334) internal successors, (2197), 12 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:33,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:33,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:33,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:34,353 INFO L130 PetriNetUnfolder]: 1123/2260 cut-off events. [2023-09-01 01:59:34,353 INFO L131 PetriNetUnfolder]: For 67887/67887 co-relation queries the response was YES. [2023-09-01 01:59:34,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21208 conditions, 2260 events. 1123/2260 cut-off events. For 67887/67887 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 15391 event pairs, 76 based on Foata normal form. 16/2276 useless extension candidates. Maximal degree in co-relation 21097. Up to 1737 conditions per place. [2023-09-01 01:59:34,377 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 355 selfloop transitions, 121 changer transitions 0/476 dead transitions. [2023-09-01 01:59:34,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 476 transitions, 11077 flow [2023-09-01 01:59:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 01:59:34,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 01:59:34,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2607 transitions. [2023-09-01 01:59:34,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425146771037182 [2023-09-01 01:59:34,379 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2607 transitions. [2023-09-01 01:59:34,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2607 transitions. [2023-09-01 01:59:34,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:34,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2607 transitions. [2023-09-01 01:59:34,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.21428571428572) internal successors, (2607), 14 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:34,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:34,383 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:34,384 INFO L175 Difference]: Start difference. First operand has 330 places, 450 transitions, 9930 flow. Second operand 14 states and 2607 transitions. [2023-09-01 01:59:34,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 476 transitions, 11077 flow [2023-09-01 01:59:34,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 476 transitions, 10723 flow, removed 33 selfloop flow, removed 15 redundant places. [2023-09-01 01:59:34,862 INFO L231 Difference]: Finished difference. Result has 323 places, 443 transitions, 9692 flow [2023-09-01 01:59:34,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=9358, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9692, PETRI_PLACES=323, PETRI_TRANSITIONS=443} [2023-09-01 01:59:34,863 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 294 predicate places. [2023-09-01 01:59:34,863 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 443 transitions, 9692 flow [2023-09-01 01:59:34,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.08333333333334) internal successors, (2197), 12 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:34,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:34,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:34,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:35,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:35,064 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:35,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:35,064 INFO L85 PathProgramCache]: Analyzing trace with hash -611760485, now seen corresponding path program 29 times [2023-09-01 01:59:35,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:35,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441350962] [2023-09-01 01:59:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:35,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:35,131 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 01:59:35,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:35,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441350962] [2023-09-01 01:59:35,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441350962] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:35,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819404985] [2023-09-01 01:59:35,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:59:35,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:35,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:35,133 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:35,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 01:59:35,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 01:59:35,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:35,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:35,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:35,277 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 01:59:35,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:35,304 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 01:59:35,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819404985] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:35,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:35,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-09-01 01:59:35,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589133768] [2023-09-01 01:59:35,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:35,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:59:35,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:35,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:59:35,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:59:35,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:35,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 443 transitions, 9692 flow. Second operand has 13 states, 13 states have (on average 183.0) internal successors, (2379), 13 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:35,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:35,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:35,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:36,018 INFO L130 PetriNetUnfolder]: 1141/2316 cut-off events. [2023-09-01 01:59:36,018 INFO L131 PetriNetUnfolder]: For 69197/69197 co-relation queries the response was YES. [2023-09-01 01:59:36,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21426 conditions, 2316 events. 1141/2316 cut-off events. For 69197/69197 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 16025 event pairs, 317 based on Foata normal form. 18/2334 useless extension candidates. Maximal degree in co-relation 21317. Up to 1661 conditions per place. [2023-09-01 01:59:36,045 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 398 selfloop transitions, 104 changer transitions 0/502 dead transitions. [2023-09-01 01:59:36,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 502 transitions, 11539 flow [2023-09-01 01:59:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 01:59:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 01:59:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2246 transitions. [2023-09-01 01:59:36,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273211567732116 [2023-09-01 01:59:36,047 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2246 transitions. [2023-09-01 01:59:36,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2246 transitions. [2023-09-01 01:59:36,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:36,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2246 transitions. [2023-09-01 01:59:36,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.16666666666666) internal successors, (2246), 12 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:36,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 438.0) internal successors, (5694), 13 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:36,051 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 438.0) internal successors, (5694), 13 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:36,051 INFO L175 Difference]: Start difference. First operand has 323 places, 443 transitions, 9692 flow. Second operand 12 states and 2246 transitions. [2023-09-01 01:59:36,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 502 transitions, 11539 flow [2023-09-01 01:59:36,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 502 transitions, 11285 flow, removed 4 selfloop flow, removed 11 redundant places. [2023-09-01 01:59:36,529 INFO L231 Difference]: Finished difference. Result has 325 places, 451 transitions, 9883 flow [2023-09-01 01:59:36,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=9284, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9883, PETRI_PLACES=325, PETRI_TRANSITIONS=451} [2023-09-01 01:59:36,530 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 296 predicate places. [2023-09-01 01:59:36,530 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 451 transitions, 9883 flow [2023-09-01 01:59:36,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 183.0) internal successors, (2379), 13 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:36,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:36,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:36,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:36,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-09-01 01:59:36,731 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:36,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:36,732 INFO L85 PathProgramCache]: Analyzing trace with hash 64083315, now seen corresponding path program 30 times [2023-09-01 01:59:36,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:36,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537230467] [2023-09-01 01:59:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:36,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:36,789 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 01:59:36,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:36,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537230467] [2023-09-01 01:59:36,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537230467] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:36,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957253867] [2023-09-01 01:59:36,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 01:59:36,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:36,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:36,791 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:36,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 01:59:36,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 01:59:36,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:36,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:36,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:36,919 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 01:59:36,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:36,944 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 01:59:36,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957253867] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:36,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:36,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 01:59:36,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585006687] [2023-09-01 01:59:36,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:36,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:59:36,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:36,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:59:36,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:59:37,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:37,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 451 transitions, 9883 flow. Second operand has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:37,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:37,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:37,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:37,729 INFO L130 PetriNetUnfolder]: 1203/2456 cut-off events. [2023-09-01 01:59:37,729 INFO L131 PetriNetUnfolder]: For 77520/77520 co-relation queries the response was YES. [2023-09-01 01:59:37,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23151 conditions, 2456 events. 1203/2456 cut-off events. For 77520/77520 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 17358 event pairs, 274 based on Foata normal form. 12/2468 useless extension candidates. Maximal degree in co-relation 23041. Up to 1444 conditions per place. [2023-09-01 01:59:37,757 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 366 selfloop transitions, 168 changer transitions 0/534 dead transitions. [2023-09-01 01:59:37,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 534 transitions, 12508 flow [2023-09-01 01:59:37,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 01:59:37,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 01:59:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2437 transitions. [2023-09-01 01:59:37,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42799438004917456 [2023-09-01 01:59:37,759 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2437 transitions. [2023-09-01 01:59:37,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2437 transitions. [2023-09-01 01:59:37,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:37,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2437 transitions. [2023-09-01 01:59:37,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.46153846153845) internal successors, (2437), 13 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:37,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 438.0) internal successors, (6132), 14 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:37,763 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 438.0) internal successors, (6132), 14 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:37,763 INFO L175 Difference]: Start difference. First operand has 325 places, 451 transitions, 9883 flow. Second operand 13 states and 2437 transitions. [2023-09-01 01:59:37,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 534 transitions, 12508 flow [2023-09-01 01:59:38,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 534 transitions, 12276 flow, removed 33 selfloop flow, removed 11 redundant places. [2023-09-01 01:59:38,309 INFO L231 Difference]: Finished difference. Result has 328 places, 467 transitions, 10596 flow [2023-09-01 01:59:38,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=9541, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10596, PETRI_PLACES=328, PETRI_TRANSITIONS=467} [2023-09-01 01:59:38,309 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 299 predicate places. [2023-09-01 01:59:38,309 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 467 transitions, 10596 flow [2023-09-01 01:59:38,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:38,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:38,310 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:38,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:38,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:38,515 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:38,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:38,516 INFO L85 PathProgramCache]: Analyzing trace with hash 73597651, now seen corresponding path program 31 times [2023-09-01 01:59:38,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:38,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838326782] [2023-09-01 01:59:38,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:38,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:38,569 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 01:59:38,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:38,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838326782] [2023-09-01 01:59:38,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838326782] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:38,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652852271] [2023-09-01 01:59:38,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 01:59:38,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:38,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:38,571 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:38,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-09-01 01:59:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:38,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:59:38,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:38,685 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 01:59:38,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:38,712 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 01:59:38,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652852271] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:38,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:38,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 01:59:38,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585484316] [2023-09-01 01:59:38,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:38,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:59:38,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:38,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:59:38,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:59:38,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 01:59:38,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 467 transitions, 10596 flow. Second operand has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:38,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:38,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 01:59:38,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:39,596 INFO L130 PetriNetUnfolder]: 1197/2442 cut-off events. [2023-09-01 01:59:39,596 INFO L131 PetriNetUnfolder]: For 77508/77508 co-relation queries the response was YES. [2023-09-01 01:59:39,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23448 conditions, 2442 events. 1197/2442 cut-off events. For 77508/77508 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 17218 event pairs, 167 based on Foata normal form. 6/2448 useless extension candidates. Maximal degree in co-relation 23339. Up to 703 conditions per place. [2023-09-01 01:59:39,623 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 329 selfloop transitions, 197 changer transitions 2/528 dead transitions. [2023-09-01 01:59:39,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 528 transitions, 12627 flow [2023-09-01 01:59:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 01:59:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 01:59:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3348 transitions. [2023-09-01 01:59:39,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246575342465753 [2023-09-01 01:59:39,628 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3348 transitions. [2023-09-01 01:59:39,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3348 transitions. [2023-09-01 01:59:39,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:39,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3348 transitions. [2023-09-01 01:59:39,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 186.0) internal successors, (3348), 18 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:39,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:39,634 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:39,634 INFO L175 Difference]: Start difference. First operand has 328 places, 467 transitions, 10596 flow. Second operand 18 states and 3348 transitions. [2023-09-01 01:59:39,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 528 transitions, 12627 flow [2023-09-01 01:59:40,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 528 transitions, 12421 flow, removed 59 selfloop flow, removed 7 redundant places. [2023-09-01 01:59:40,164 INFO L231 Difference]: Finished difference. Result has 337 places, 468 transitions, 10932 flow [2023-09-01 01:59:40,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=10272, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10932, PETRI_PLACES=337, PETRI_TRANSITIONS=468} [2023-09-01 01:59:40,165 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 308 predicate places. [2023-09-01 01:59:40,165 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 468 transitions, 10932 flow [2023-09-01 01:59:40,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:40,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:40,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:40,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-09-01 01:59:40,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-09-01 01:59:40,366 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:40,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:40,366 INFO L85 PathProgramCache]: Analyzing trace with hash -497534338, now seen corresponding path program 32 times [2023-09-01 01:59:40,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:40,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917082136] [2023-09-01 01:59:40,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:40,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:40,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:40,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917082136] [2023-09-01 01:59:40,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917082136] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:40,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867859580] [2023-09-01 01:59:40,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:59:40,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:40,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:40,911 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:40,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-09-01 01:59:41,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:59:41,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:41,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 01:59:41,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:41,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:41,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867859580] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:41,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:41,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 01:59:41,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136493298] [2023-09-01 01:59:41,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:41,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 01:59:41,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:41,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 01:59:41,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-09-01 01:59:41,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 01:59:41,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 468 transitions, 10932 flow. Second operand has 19 states, 19 states have (on average 175.05263157894737) internal successors, (3326), 19 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:41,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:41,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 01:59:41,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:42,690 INFO L130 PetriNetUnfolder]: 1392/2876 cut-off events. [2023-09-01 01:59:42,690 INFO L131 PetriNetUnfolder]: For 93552/93554 co-relation queries the response was YES. [2023-09-01 01:59:42,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28207 conditions, 2876 events. 1392/2876 cut-off events. For 93552/93554 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 21203 event pairs, 93 based on Foata normal form. 5/2876 useless extension candidates. Maximal degree in co-relation 28097. Up to 2263 conditions per place. [2023-09-01 01:59:42,727 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 473 selfloop transitions, 112 changer transitions 14/609 dead transitions. [2023-09-01 01:59:42,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 609 transitions, 14541 flow [2023-09-01 01:59:42,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 01:59:42,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 01:59:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1985 transitions. [2023-09-01 01:59:42,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119966791199668 [2023-09-01 01:59:42,729 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1985 transitions. [2023-09-01 01:59:42,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1985 transitions. [2023-09-01 01:59:42,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:42,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1985 transitions. [2023-09-01 01:59:42,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 180.45454545454547) internal successors, (1985), 11 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:42,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:42,732 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:42,733 INFO L175 Difference]: Start difference. First operand has 337 places, 468 transitions, 10932 flow. Second operand 11 states and 1985 transitions. [2023-09-01 01:59:42,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 609 transitions, 14541 flow [2023-09-01 01:59:43,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 609 transitions, 14282 flow, removed 55 selfloop flow, removed 8 redundant places. [2023-09-01 01:59:43,639 INFO L231 Difference]: Finished difference. Result has 345 places, 533 transitions, 12728 flow [2023-09-01 01:59:43,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=10715, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12728, PETRI_PLACES=345, PETRI_TRANSITIONS=533} [2023-09-01 01:59:43,641 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 316 predicate places. [2023-09-01 01:59:43,641 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 533 transitions, 12728 flow [2023-09-01 01:59:43,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 175.05263157894737) internal successors, (3326), 19 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:43,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:43,642 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:43,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:43,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-09-01 01:59:43,847 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:43,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:43,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1390097594, now seen corresponding path program 33 times [2023-09-01 01:59:43,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:43,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16984583] [2023-09-01 01:59:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:43,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:44,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:44,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16984583] [2023-09-01 01:59:44,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16984583] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:44,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660610884] [2023-09-01 01:59:44,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:59:44,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:44,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:44,323 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:44,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-09-01 01:59:44,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 01:59:44,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:44,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 01:59:44,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:44,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:44,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660610884] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:44,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:44,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-09-01 01:59:44,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568178949] [2023-09-01 01:59:44,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:44,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 01:59:44,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:44,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 01:59:44,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-09-01 01:59:45,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 01:59:45,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 533 transitions, 12728 flow. Second operand has 15 states, 15 states have (on average 175.2) internal successors, (2628), 15 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:45,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:45,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 01:59:45,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:46,135 INFO L130 PetriNetUnfolder]: 1392/2852 cut-off events. [2023-09-01 01:59:46,135 INFO L131 PetriNetUnfolder]: For 97015/97017 co-relation queries the response was YES. [2023-09-01 01:59:46,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29031 conditions, 2852 events. 1392/2852 cut-off events. For 97015/97017 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 20825 event pairs, 108 based on Foata normal form. 7/2854 useless extension candidates. Maximal degree in co-relation 28911. Up to 2471 conditions per place. [2023-09-01 01:59:46,174 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 480 selfloop transitions, 81 changer transitions 19/590 dead transitions. [2023-09-01 01:59:46,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 590 transitions, 14437 flow [2023-09-01 01:59:46,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 01:59:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 01:59:46,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2149 transitions. [2023-09-01 01:59:46,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088660578386606 [2023-09-01 01:59:46,183 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2149 transitions. [2023-09-01 01:59:46,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2149 transitions. [2023-09-01 01:59:46,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:46,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2149 transitions. [2023-09-01 01:59:46,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 179.08333333333334) internal successors, (2149), 12 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:46,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 438.0) internal successors, (5694), 13 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:46,189 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 438.0) internal successors, (5694), 13 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:46,189 INFO L175 Difference]: Start difference. First operand has 345 places, 533 transitions, 12728 flow. Second operand 12 states and 2149 transitions. [2023-09-01 01:59:46,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 590 transitions, 14437 flow [2023-09-01 01:59:47,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 590 transitions, 14151 flow, removed 143 selfloop flow, removed 2 redundant places. [2023-09-01 01:59:47,132 INFO L231 Difference]: Finished difference. Result has 358 places, 538 transitions, 12853 flow [2023-09-01 01:59:47,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=12460, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12853, PETRI_PLACES=358, PETRI_TRANSITIONS=538} [2023-09-01 01:59:47,133 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 329 predicate places. [2023-09-01 01:59:47,133 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 538 transitions, 12853 flow [2023-09-01 01:59:47,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 175.2) internal successors, (2628), 15 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:47,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:47,133 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:47,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:47,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-09-01 01:59:47,334 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:47,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:47,334 INFO L85 PathProgramCache]: Analyzing trace with hash 18209984, now seen corresponding path program 34 times [2023-09-01 01:59:47,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:47,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608237702] [2023-09-01 01:59:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:47,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:47,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:47,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608237702] [2023-09-01 01:59:47,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608237702] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:47,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343087501] [2023-09-01 01:59:47,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:59:47,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:47,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:47,733 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:47,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-09-01 01:59:47,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:59:47,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:47,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 01:59:47,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:47,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:48,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343087501] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:48,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:48,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 01:59:48,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871955238] [2023-09-01 01:59:48,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:48,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 01:59:48,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:48,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 01:59:48,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-09-01 01:59:48,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 01:59:48,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 538 transitions, 12853 flow. Second operand has 18 states, 18 states have (on average 175.05555555555554) internal successors, (3151), 18 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:48,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:48,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 01:59:48,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:49,539 INFO L130 PetriNetUnfolder]: 1360/2762 cut-off events. [2023-09-01 01:59:49,540 INFO L131 PetriNetUnfolder]: For 90264/90266 co-relation queries the response was YES. [2023-09-01 01:59:49,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28057 conditions, 2762 events. 1360/2762 cut-off events. For 90264/90266 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 19861 event pairs, 89 based on Foata normal form. 3/2760 useless extension candidates. Maximal degree in co-relation 27932. Up to 2267 conditions per place. [2023-09-01 01:59:49,574 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 464 selfloop transitions, 106 changer transitions 5/585 dead transitions. [2023-09-01 01:59:49,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 585 transitions, 14379 flow [2023-09-01 01:59:49,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:59:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:59:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1626 transitions. [2023-09-01 01:59:49,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124809741248097 [2023-09-01 01:59:49,578 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1626 transitions. [2023-09-01 01:59:49,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1626 transitions. [2023-09-01 01:59:49,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:49,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1626 transitions. [2023-09-01 01:59:49,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.66666666666666) internal successors, (1626), 9 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:49,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:49,582 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:49,582 INFO L175 Difference]: Start difference. First operand has 358 places, 538 transitions, 12853 flow. Second operand 9 states and 1626 transitions. [2023-09-01 01:59:49,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 585 transitions, 14379 flow [2023-09-01 01:59:50,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 585 transitions, 14053 flow, removed 133 selfloop flow, removed 4 redundant places. [2023-09-01 01:59:50,348 INFO L231 Difference]: Finished difference. Result has 362 places, 540 transitions, 12885 flow [2023-09-01 01:59:50,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=12543, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12885, PETRI_PLACES=362, PETRI_TRANSITIONS=540} [2023-09-01 01:59:50,348 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 333 predicate places. [2023-09-01 01:59:50,349 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 540 transitions, 12885 flow [2023-09-01 01:59:50,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 175.05555555555554) internal successors, (3151), 18 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:50,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:50,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:50,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-09-01 01:59:50,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-09-01 01:59:50,550 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:50,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:50,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2135435222, now seen corresponding path program 35 times [2023-09-01 01:59:50,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:50,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651011744] [2023-09-01 01:59:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:50,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:50,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:50,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651011744] [2023-09-01 01:59:50,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651011744] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:50,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347353376] [2023-09-01 01:59:50,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:59:50,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:50,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:50,893 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:50,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-09-01 01:59:51,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:59:51,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:51,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 01:59:51,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:51,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:51,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347353376] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:51,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:51,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-09-01 01:59:51,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638869728] [2023-09-01 01:59:51,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:51,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 01:59:51,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:51,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 01:59:51,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-09-01 01:59:51,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 01:59:51,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 540 transitions, 12885 flow. Second operand has 16 states, 16 states have (on average 175.125) internal successors, (2802), 16 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:51,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:51,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 01:59:51,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:52,623 INFO L130 PetriNetUnfolder]: 1351/2734 cut-off events. [2023-09-01 01:59:52,623 INFO L131 PetriNetUnfolder]: For 92119/92121 co-relation queries the response was YES. [2023-09-01 01:59:52,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27679 conditions, 2734 events. 1351/2734 cut-off events. For 92119/92121 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19577 event pairs, 86 based on Foata normal form. 4/2733 useless extension candidates. Maximal degree in co-relation 27553. Up to 2339 conditions per place. [2023-09-01 01:59:52,663 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 475 selfloop transitions, 97 changer transitions 5/587 dead transitions. [2023-09-01 01:59:52,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 587 transitions, 14328 flow [2023-09-01 01:59:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 01:59:52,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 01:59:52,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1974 transitions. [2023-09-01 01:59:52,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40971357409713577 [2023-09-01 01:59:52,666 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1974 transitions. [2023-09-01 01:59:52,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1974 transitions. [2023-09-01 01:59:52,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:52,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1974 transitions. [2023-09-01 01:59:52,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 179.45454545454547) internal successors, (1974), 11 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:52,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:52,670 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:52,670 INFO L175 Difference]: Start difference. First operand has 362 places, 540 transitions, 12885 flow. Second operand 11 states and 1974 transitions. [2023-09-01 01:59:52,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 587 transitions, 14328 flow [2023-09-01 01:59:53,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 587 transitions, 14019 flow, removed 38 selfloop flow, removed 7 redundant places. [2023-09-01 01:59:53,594 INFO L231 Difference]: Finished difference. Result has 366 places, 545 transitions, 12910 flow [2023-09-01 01:59:53,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=12584, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12910, PETRI_PLACES=366, PETRI_TRANSITIONS=545} [2023-09-01 01:59:53,594 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 337 predicate places. [2023-09-01 01:59:53,594 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 545 transitions, 12910 flow [2023-09-01 01:59:53,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 175.125) internal successors, (2802), 16 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:53,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:53,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:53,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-09-01 01:59:53,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:53,796 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:53,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:53,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2017600142, now seen corresponding path program 36 times [2023-09-01 01:59:53,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:53,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389729473] [2023-09-01 01:59:53,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:53,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:54,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:54,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389729473] [2023-09-01 01:59:54,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389729473] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:54,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444998884] [2023-09-01 01:59:54,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 01:59:54,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:54,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:54,165 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:54,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-09-01 01:59:54,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 01:59:54,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:54,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 01:59:54,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:54,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:54,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444998884] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:54,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:54,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-09-01 01:59:54,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769985959] [2023-09-01 01:59:54,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:54,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 01:59:54,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:54,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 01:59:54,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-09-01 01:59:54,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 01:59:54,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 545 transitions, 12910 flow. Second operand has 19 states, 19 states have (on average 175.10526315789474) internal successors, (3327), 19 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:54,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:54,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 01:59:54,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:55,969 INFO L130 PetriNetUnfolder]: 1427/2920 cut-off events. [2023-09-01 01:59:55,969 INFO L131 PetriNetUnfolder]: For 98000/98002 co-relation queries the response was YES. [2023-09-01 01:59:55,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29366 conditions, 2920 events. 1427/2920 cut-off events. For 98000/98002 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 21382 event pairs, 114 based on Foata normal form. 4/2919 useless extension candidates. Maximal degree in co-relation 29240. Up to 2592 conditions per place. [2023-09-01 01:59:56,005 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 515 selfloop transitions, 91 changer transitions 9/625 dead transitions. [2023-09-01 01:59:56,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 625 transitions, 15394 flow [2023-09-01 01:59:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:59:56,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:59:56,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1619 transitions. [2023-09-01 01:59:56,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41070522577371893 [2023-09-01 01:59:56,007 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1619 transitions. [2023-09-01 01:59:56,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1619 transitions. [2023-09-01 01:59:56,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:56,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1619 transitions. [2023-09-01 01:59:56,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.88888888888889) internal successors, (1619), 9 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:56,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:56,010 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:56,010 INFO L175 Difference]: Start difference. First operand has 366 places, 545 transitions, 12910 flow. Second operand 9 states and 1619 transitions. [2023-09-01 01:59:56,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 625 transitions, 15394 flow [2023-09-01 01:59:56,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 625 transitions, 15203 flow, removed 20 selfloop flow, removed 8 redundant places. [2023-09-01 01:59:56,843 INFO L231 Difference]: Finished difference. Result has 369 places, 578 transitions, 13779 flow [2023-09-01 01:59:56,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=12727, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13779, PETRI_PLACES=369, PETRI_TRANSITIONS=578} [2023-09-01 01:59:56,844 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 340 predicate places. [2023-09-01 01:59:56,844 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 578 transitions, 13779 flow [2023-09-01 01:59:56,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 175.10526315789474) internal successors, (3327), 19 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:56,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:56,845 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:56,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-09-01 01:59:57,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:57,045 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:59:57,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:57,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1071783608, now seen corresponding path program 37 times [2023-09-01 01:59:57,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:57,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346915153] [2023-09-01 01:59:57,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:57,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:57,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:57,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346915153] [2023-09-01 01:59:57,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346915153] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:57,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823816973] [2023-09-01 01:59:57,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 01:59:57,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:57,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:57,385 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:59:57,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-09-01 01:59:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:57,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 01:59:57,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:57,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:59:57,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823816973] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:57,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:57,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-09-01 01:59:57,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688943256] [2023-09-01 01:59:57,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:57,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 01:59:57,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:57,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 01:59:57,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-09-01 01:59:58,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 01:59:58,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 578 transitions, 13779 flow. Second operand has 19 states, 19 states have (on average 175.0) internal successors, (3325), 19 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:58,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:58,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 01:59:58,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:59,043 INFO L130 PetriNetUnfolder]: 1421/2886 cut-off events. [2023-09-01 01:59:59,043 INFO L131 PetriNetUnfolder]: For 98262/98264 co-relation queries the response was YES. [2023-09-01 01:59:59,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29346 conditions, 2886 events. 1421/2886 cut-off events. For 98262/98264 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 20936 event pairs, 115 based on Foata normal form. 4/2885 useless extension candidates. Maximal degree in co-relation 29218. Up to 2592 conditions per place. [2023-09-01 01:59:59,083 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 508 selfloop transitions, 91 changer transitions 6/615 dead transitions. [2023-09-01 01:59:59,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 615 transitions, 15362 flow [2023-09-01 01:59:59,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:59:59,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:59:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1440 transitions. [2023-09-01 01:59:59,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.410958904109589 [2023-09-01 01:59:59,086 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1440 transitions. [2023-09-01 01:59:59,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1440 transitions. [2023-09-01 01:59:59,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:59,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1440 transitions. [2023-09-01 01:59:59,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:59,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 438.0) internal successors, (3942), 9 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:59,090 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 438.0) internal successors, (3942), 9 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:59:59,090 INFO L175 Difference]: Start difference. First operand has 369 places, 578 transitions, 13779 flow. Second operand 8 states and 1440 transitions. [2023-09-01 01:59:59,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 615 transitions, 15362 flow [2023-09-01 02:00:00,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 615 transitions, 15170 flow, removed 43 selfloop flow, removed 5 redundant places. [2023-09-01 02:00:00,089 INFO L231 Difference]: Finished difference. Result has 372 places, 581 transitions, 13947 flow [2023-09-01 02:00:00,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=13593, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13947, PETRI_PLACES=372, PETRI_TRANSITIONS=581} [2023-09-01 02:00:00,090 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 343 predicate places. [2023-09-01 02:00:00,091 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 581 transitions, 13947 flow [2023-09-01 02:00:00,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 175.0) internal successors, (3325), 19 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:00,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:00,091 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:00,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-09-01 02:00:00,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-09-01 02:00:00,293 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:00:00,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:00,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2027114478, now seen corresponding path program 38 times [2023-09-01 02:00:00,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:00,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463570543] [2023-09-01 02:00:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:00,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:00,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:00,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463570543] [2023-09-01 02:00:00,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463570543] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:00,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809745240] [2023-09-01 02:00:00,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:00:00,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:00,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:00,645 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:00:00,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-09-01 02:00:00,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:00:00,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:00:00,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 02:00:00,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:00,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:01,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809745240] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:01,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:01,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 14 [2023-09-01 02:00:01,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893479554] [2023-09-01 02:00:01,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:01,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:00:01,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:01,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:00:01,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:00:01,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 02:00:01,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 581 transitions, 13947 flow. Second operand has 16 states, 16 states have (on average 175.3125) internal successors, (2805), 16 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:01,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:01,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 02:00:01,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:02,199 INFO L130 PetriNetUnfolder]: 1409/2850 cut-off events. [2023-09-01 02:00:02,199 INFO L131 PetriNetUnfolder]: For 98462/98464 co-relation queries the response was YES. [2023-09-01 02:00:02,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29175 conditions, 2850 events. 1409/2850 cut-off events. For 98462/98464 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 20541 event pairs, 118 based on Foata normal form. 4/2849 useless extension candidates. Maximal degree in co-relation 29046. Up to 2641 conditions per place. [2023-09-01 02:00:02,237 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 525 selfloop transitions, 72 changer transitions 7/614 dead transitions. [2023-09-01 02:00:02,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 614 transitions, 15441 flow [2023-09-01 02:00:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:00:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:00:02,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1610 transitions. [2023-09-01 02:00:02,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40842212075088785 [2023-09-01 02:00:02,242 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1610 transitions. [2023-09-01 02:00:02,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1610 transitions. [2023-09-01 02:00:02,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:02,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1610 transitions. [2023-09-01 02:00:02,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 178.88888888888889) internal successors, (1610), 9 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:02,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:02,245 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:02,245 INFO L175 Difference]: Start difference. First operand has 372 places, 581 transitions, 13947 flow. Second operand 9 states and 1610 transitions. [2023-09-01 02:00:02,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 614 transitions, 15441 flow [2023-09-01 02:00:03,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 614 transitions, 15157 flow, removed 90 selfloop flow, removed 4 redundant places. [2023-09-01 02:00:03,156 INFO L231 Difference]: Finished difference. Result has 378 places, 585 transitions, 14012 flow [2023-09-01 02:00:03,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=13705, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14012, PETRI_PLACES=378, PETRI_TRANSITIONS=585} [2023-09-01 02:00:03,157 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 349 predicate places. [2023-09-01 02:00:03,157 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 585 transitions, 14012 flow [2023-09-01 02:00:03,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 175.3125) internal successors, (2805), 16 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:03,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:03,157 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:03,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-09-01 02:00:03,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:03,358 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:00:03,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:03,358 INFO L85 PathProgramCache]: Analyzing trace with hash -699295512, now seen corresponding path program 39 times [2023-09-01 02:00:03,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:03,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703273707] [2023-09-01 02:00:03,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:03,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:03,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:03,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703273707] [2023-09-01 02:00:03,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703273707] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:03,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81747486] [2023-09-01 02:00:03,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:00:03,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:03,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:03,711 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:00:03,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-09-01 02:00:03,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 02:00:03,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:00:03,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 02:00:03,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:03,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:04,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81747486] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:04,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:04,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-09-01 02:00:04,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863284425] [2023-09-01 02:00:04,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:04,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 02:00:04,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:04,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 02:00:04,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-09-01 02:00:04,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 02:00:04,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 585 transitions, 14012 flow. Second operand has 20 states, 20 states have (on average 175.0) internal successors, (3500), 20 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:04,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:04,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 02:00:04,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:05,708 INFO L130 PetriNetUnfolder]: 1617/3314 cut-off events. [2023-09-01 02:00:05,708 INFO L131 PetriNetUnfolder]: For 118596/118598 co-relation queries the response was YES. [2023-09-01 02:00:05,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33672 conditions, 3314 events. 1617/3314 cut-off events. For 118596/118598 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 24972 event pairs, 131 based on Foata normal form. 6/3315 useless extension candidates. Maximal degree in co-relation 33541. Up to 2721 conditions per place. [2023-09-01 02:00:05,757 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 605 selfloop transitions, 129 changer transitions 15/759 dead transitions. [2023-09-01 02:00:05,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 759 transitions, 18686 flow [2023-09-01 02:00:05,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 02:00:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 02:00:05,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1985 transitions. [2023-09-01 02:00:05,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119966791199668 [2023-09-01 02:00:05,759 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1985 transitions. [2023-09-01 02:00:05,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1985 transitions. [2023-09-01 02:00:05,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:05,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1985 transitions. [2023-09-01 02:00:05,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 180.45454545454547) internal successors, (1985), 11 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:05,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:05,764 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:05,764 INFO L175 Difference]: Start difference. First operand has 378 places, 585 transitions, 14012 flow. Second operand 11 states and 1985 transitions. [2023-09-01 02:00:05,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 759 transitions, 18686 flow [2023-09-01 02:00:06,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 759 transitions, 18442 flow, removed 44 selfloop flow, removed 7 redundant places. [2023-09-01 02:00:06,944 INFO L231 Difference]: Finished difference. Result has 389 places, 668 transitions, 16312 flow [2023-09-01 02:00:06,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=13782, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16312, PETRI_PLACES=389, PETRI_TRANSITIONS=668} [2023-09-01 02:00:06,945 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 360 predicate places. [2023-09-01 02:00:06,945 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 668 transitions, 16312 flow [2023-09-01 02:00:06,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 175.0) internal successors, (3500), 20 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:06,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:06,946 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:06,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-09-01 02:00:07,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-09-01 02:00:07,147 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:00:07,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:07,147 INFO L85 PathProgramCache]: Analyzing trace with hash -911555066, now seen corresponding path program 40 times [2023-09-01 02:00:07,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:07,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313997733] [2023-09-01 02:00:07,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:07,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:07,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:07,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313997733] [2023-09-01 02:00:07,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313997733] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:07,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212119730] [2023-09-01 02:00:07,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:00:07,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:07,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:07,494 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:00:07,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-09-01 02:00:07,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:00:07,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:00:07,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 02:00:07,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:07,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:07,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212119730] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:07,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:07,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-09-01 02:00:07,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850855941] [2023-09-01 02:00:07,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:07,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 02:00:07,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:07,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 02:00:07,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-09-01 02:00:08,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 02:00:08,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 668 transitions, 16312 flow. Second operand has 17 states, 17 states have (on average 175.2941176470588) internal successors, (2980), 17 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:08,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:08,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 02:00:08,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:09,531 INFO L130 PetriNetUnfolder]: 1741/3587 cut-off events. [2023-09-01 02:00:09,531 INFO L131 PetriNetUnfolder]: For 134593/134595 co-relation queries the response was YES. [2023-09-01 02:00:09,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37136 conditions, 3587 events. 1741/3587 cut-off events. For 134593/134595 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27619 event pairs, 141 based on Foata normal form. 5/3587 useless extension candidates. Maximal degree in co-relation 36997. Up to 3074 conditions per place. [2023-09-01 02:00:09,586 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 646 selfloop transitions, 113 changer transitions 7/776 dead transitions. [2023-09-01 02:00:09,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 776 transitions, 19812 flow [2023-09-01 02:00:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:00:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:00:09,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1624 transitions. [2023-09-01 02:00:09,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119736174530695 [2023-09-01 02:00:09,588 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1624 transitions. [2023-09-01 02:00:09,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1624 transitions. [2023-09-01 02:00:09,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:09,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1624 transitions. [2023-09-01 02:00:09,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.44444444444446) internal successors, (1624), 9 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:09,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:09,591 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:09,591 INFO L175 Difference]: Start difference. First operand has 389 places, 668 transitions, 16312 flow. Second operand 9 states and 1624 transitions. [2023-09-01 02:00:09,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 776 transitions, 19812 flow [2023-09-01 02:00:11,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 776 transitions, 19397 flow, removed 206 selfloop flow, removed 3 redundant places. [2023-09-01 02:00:11,020 INFO L231 Difference]: Finished difference. Result has 396 places, 713 transitions, 17482 flow [2023-09-01 02:00:11,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=15917, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17482, PETRI_PLACES=396, PETRI_TRANSITIONS=713} [2023-09-01 02:00:11,021 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 367 predicate places. [2023-09-01 02:00:11,021 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 713 transitions, 17482 flow [2023-09-01 02:00:11,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 175.2941176470588) internal successors, (2980), 17 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:11,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:11,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:11,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-09-01 02:00:11,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:11,227 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:00:11,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:11,228 INFO L85 PathProgramCache]: Analyzing trace with hash 506288034, now seen corresponding path program 41 times [2023-09-01 02:00:11,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:11,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20440569] [2023-09-01 02:00:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:11,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:11,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:11,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20440569] [2023-09-01 02:00:11,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20440569] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:11,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723361903] [2023-09-01 02:00:11,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:00:11,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:11,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:11,576 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:00:11,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-09-01 02:00:11,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 02:00:11,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:00:11,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 02:00:11,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:11,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:11,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723361903] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:11,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:11,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 02:00:11,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949044924] [2023-09-01 02:00:11,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:11,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 02:00:11,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:11,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 02:00:11,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-09-01 02:00:12,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 02:00:12,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 713 transitions, 17482 flow. Second operand has 19 states, 19 states have (on average 174.94736842105263) internal successors, (3324), 19 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:12,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:12,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 02:00:12,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:13,649 INFO L130 PetriNetUnfolder]: 1736/3551 cut-off events. [2023-09-01 02:00:13,649 INFO L131 PetriNetUnfolder]: For 135962/135964 co-relation queries the response was YES. [2023-09-01 02:00:13,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37173 conditions, 3551 events. 1736/3551 cut-off events. For 135962/135964 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 27070 event pairs, 159 based on Foata normal form. 6/3552 useless extension candidates. Maximal degree in co-relation 37032. Up to 3009 conditions per place. [2023-09-01 02:00:13,697 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 638 selfloop transitions, 125 changer transitions 16/789 dead transitions. [2023-09-01 02:00:13,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 789 transitions, 20114 flow [2023-09-01 02:00:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 02:00:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 02:00:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1977 transitions. [2023-09-01 02:00:13,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41033623910336237 [2023-09-01 02:00:13,699 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1977 transitions. [2023-09-01 02:00:13,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1977 transitions. [2023-09-01 02:00:13,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:13,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1977 transitions. [2023-09-01 02:00:13,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 179.72727272727272) internal successors, (1977), 11 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:13,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:13,702 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:13,702 INFO L175 Difference]: Start difference. First operand has 396 places, 713 transitions, 17482 flow. Second operand 11 states and 1977 transitions. [2023-09-01 02:00:13,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 789 transitions, 20114 flow [2023-09-01 02:00:15,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 789 transitions, 19771 flow, removed 109 selfloop flow, removed 4 redundant places. [2023-09-01 02:00:15,127 INFO L231 Difference]: Finished difference. Result has 405 places, 710 transitions, 17463 flow [2023-09-01 02:00:15,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=17149, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17463, PETRI_PLACES=405, PETRI_TRANSITIONS=710} [2023-09-01 02:00:15,128 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 376 predicate places. [2023-09-01 02:00:15,128 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 710 transitions, 17463 flow [2023-09-01 02:00:15,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 174.94736842105263) internal successors, (3324), 19 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:15,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:15,129 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:15,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-09-01 02:00:15,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:15,330 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:00:15,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:15,330 INFO L85 PathProgramCache]: Analyzing trace with hash 679729750, now seen corresponding path program 42 times [2023-09-01 02:00:15,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:15,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852885221] [2023-09-01 02:00:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:15,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:15,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:15,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852885221] [2023-09-01 02:00:15,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852885221] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:15,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658407875] [2023-09-01 02:00:15,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 02:00:15,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:15,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:15,617 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:00:15,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-09-01 02:00:15,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 02:00:15,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:00:15,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 02:00:15,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:15,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:16,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658407875] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:16,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:16,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-09-01 02:00:16,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248257192] [2023-09-01 02:00:16,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:16,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:00:16,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:16,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:00:16,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:00:16,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 02:00:16,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 710 transitions, 17463 flow. Second operand has 16 states, 16 states have (on average 175.25) internal successors, (2804), 16 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:16,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:16,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 02:00:16,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:17,658 INFO L130 PetriNetUnfolder]: 1720/3507 cut-off events. [2023-09-01 02:00:17,658 INFO L131 PetriNetUnfolder]: For 133418/133420 co-relation queries the response was YES. [2023-09-01 02:00:17,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36798 conditions, 3507 events. 1720/3507 cut-off events. For 133418/133420 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26566 event pairs, 157 based on Foata normal form. 6/3508 useless extension candidates. Maximal degree in co-relation 36654. Up to 3090 conditions per place. [2023-09-01 02:00:17,709 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 639 selfloop transitions, 122 changer transitions 15/786 dead transitions. [2023-09-01 02:00:17,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 786 transitions, 20093 flow [2023-09-01 02:00:17,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:00:17,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:00:17,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2151 transitions. [2023-09-01 02:00:17,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092465753424658 [2023-09-01 02:00:17,711 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2151 transitions. [2023-09-01 02:00:17,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2151 transitions. [2023-09-01 02:00:17,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:17,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2151 transitions. [2023-09-01 02:00:17,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 179.25) internal successors, (2151), 12 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:17,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 438.0) internal successors, (5694), 13 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:17,715 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 438.0) internal successors, (5694), 13 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:17,715 INFO L175 Difference]: Start difference. First operand has 405 places, 710 transitions, 17463 flow. Second operand 12 states and 2151 transitions. [2023-09-01 02:00:17,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 786 transitions, 20093 flow [2023-09-01 02:00:19,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 786 transitions, 19635 flow, removed 126 selfloop flow, removed 7 redundant places. [2023-09-01 02:00:19,185 INFO L231 Difference]: Finished difference. Result has 410 places, 723 transitions, 17705 flow [2023-09-01 02:00:19,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=17085, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17705, PETRI_PLACES=410, PETRI_TRANSITIONS=723} [2023-09-01 02:00:19,186 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 381 predicate places. [2023-09-01 02:00:19,186 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 723 transitions, 17705 flow [2023-09-01 02:00:19,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 175.25) internal successors, (2804), 16 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:19,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:19,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:19,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-09-01 02:00:19,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-09-01 02:00:19,387 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:00:19,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:19,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1590629470, now seen corresponding path program 43 times [2023-09-01 02:00:19,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:19,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395014695] [2023-09-01 02:00:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:19,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:19,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:19,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395014695] [2023-09-01 02:00:19,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395014695] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:19,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189141634] [2023-09-01 02:00:19,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 02:00:19,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:19,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:19,703 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:00:19,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-09-01 02:00:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:19,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 02:00:19,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:19,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:20,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189141634] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:20,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:20,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-09-01 02:00:20,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675725112] [2023-09-01 02:00:20,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:20,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:00:20,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:20,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:00:20,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:00:20,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 02:00:20,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 723 transitions, 17705 flow. Second operand has 16 states, 16 states have (on average 175.25) internal successors, (2804), 16 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:20,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:20,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 02:00:20,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:21,729 INFO L130 PetriNetUnfolder]: 1710/3460 cut-off events. [2023-09-01 02:00:21,729 INFO L131 PetriNetUnfolder]: For 127078/127080 co-relation queries the response was YES. [2023-09-01 02:00:21,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36257 conditions, 3460 events. 1710/3460 cut-off events. For 127078/127080 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 25890 event pairs, 159 based on Foata normal form. 3/3458 useless extension candidates. Maximal degree in co-relation 36110. Up to 3167 conditions per place. [2023-09-01 02:00:21,777 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 654 selfloop transitions, 102 changer transitions 5/771 dead transitions. [2023-09-01 02:00:21,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 771 transitions, 19711 flow [2023-09-01 02:00:21,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 02:00:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 02:00:21,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1967 transitions. [2023-09-01 02:00:21,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082606890826069 [2023-09-01 02:00:21,779 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1967 transitions. [2023-09-01 02:00:21,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1967 transitions. [2023-09-01 02:00:21,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:21,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1967 transitions. [2023-09-01 02:00:21,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 178.8181818181818) internal successors, (1967), 11 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:21,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:21,782 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:21,783 INFO L175 Difference]: Start difference. First operand has 410 places, 723 transitions, 17705 flow. Second operand 11 states and 1967 transitions. [2023-09-01 02:00:21,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 771 transitions, 19711 flow [2023-09-01 02:00:23,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 771 transitions, 19433 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-09-01 02:00:23,134 INFO L231 Difference]: Finished difference. Result has 416 places, 735 transitions, 17991 flow [2023-09-01 02:00:23,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=17441, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17991, PETRI_PLACES=416, PETRI_TRANSITIONS=735} [2023-09-01 02:00:23,135 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 387 predicate places. [2023-09-01 02:00:23,136 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 735 transitions, 17991 flow [2023-09-01 02:00:23,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 175.25) internal successors, (2804), 16 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:23,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:23,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:23,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-09-01 02:00:23,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-09-01 02:00:23,337 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:00:23,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:23,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1883713578, now seen corresponding path program 44 times [2023-09-01 02:00:23,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:23,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548147569] [2023-09-01 02:00:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:23,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:23,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:23,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548147569] [2023-09-01 02:00:23,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548147569] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:23,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186403463] [2023-09-01 02:00:23,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:00:23,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:23,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:23,661 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:00:23,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-09-01 02:00:23,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:00:23,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:00:23,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 02:00:23,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:23,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:24,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186403463] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:24,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:24,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-09-01 02:00:24,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761139958] [2023-09-01 02:00:24,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:24,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 02:00:24,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:24,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 02:00:24,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-09-01 02:00:24,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 02:00:24,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 735 transitions, 17991 flow. Second operand has 17 states, 17 states have (on average 175.11764705882354) internal successors, (2977), 17 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:24,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:24,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 02:00:24,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:25,710 INFO L130 PetriNetUnfolder]: 1707/3437 cut-off events. [2023-09-01 02:00:25,711 INFO L131 PetriNetUnfolder]: For 126696/126698 co-relation queries the response was YES. [2023-09-01 02:00:25,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36081 conditions, 3437 events. 1707/3437 cut-off events. For 126696/126698 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 25593 event pairs, 136 based on Foata normal form. 5/3437 useless extension candidates. Maximal degree in co-relation 35933. Up to 3136 conditions per place. [2023-09-01 02:00:25,761 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 671 selfloop transitions, 81 changer transitions 7/769 dead transitions. [2023-09-01 02:00:25,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 769 transitions, 19806 flow [2023-09-01 02:00:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:00:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:00:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1611 transitions. [2023-09-01 02:00:25,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408675799086758 [2023-09-01 02:00:25,763 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1611 transitions. [2023-09-01 02:00:25,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1611 transitions. [2023-09-01 02:00:25,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:25,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1611 transitions. [2023-09-01 02:00:25,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:25,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:25,767 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:25,767 INFO L175 Difference]: Start difference. First operand has 416 places, 735 transitions, 17991 flow. Second operand 9 states and 1611 transitions. [2023-09-01 02:00:25,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 769 transitions, 19806 flow [2023-09-01 02:00:27,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 769 transitions, 19525 flow, removed 58 selfloop flow, removed 7 redundant places. [2023-09-01 02:00:27,223 INFO L231 Difference]: Finished difference. Result has 418 places, 738 transitions, 18035 flow [2023-09-01 02:00:27,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=17714, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18035, PETRI_PLACES=418, PETRI_TRANSITIONS=738} [2023-09-01 02:00:27,223 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 389 predicate places. [2023-09-01 02:00:27,224 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 738 transitions, 18035 flow [2023-09-01 02:00:27,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 175.11764705882354) internal successors, (2977), 17 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:27,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:27,224 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:27,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-09-01 02:00:27,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-09-01 02:00:27,429 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:00:27,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:27,429 INFO L85 PathProgramCache]: Analyzing trace with hash 294028480, now seen corresponding path program 45 times [2023-09-01 02:00:27,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:27,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116541535] [2023-09-01 02:00:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:27,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:27,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:27,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116541535] [2023-09-01 02:00:27,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116541535] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:27,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644878825] [2023-09-01 02:00:27,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:00:27,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:27,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:27,724 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:00:27,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-09-01 02:00:27,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 02:00:27,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:00:27,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 02:00:27,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:27,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:28,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644878825] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:28,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:28,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-09-01 02:00:28,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328866880] [2023-09-01 02:00:28,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:28,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 02:00:28,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:28,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 02:00:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-09-01 02:00:28,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-09-01 02:00:28,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 738 transitions, 18035 flow. Second operand has 17 states, 17 states have (on average 175.11764705882354) internal successors, (2977), 17 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:28,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:28,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-09-01 02:00:28,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:29,630 INFO L130 PetriNetUnfolder]: 1692/3392 cut-off events. [2023-09-01 02:00:29,631 INFO L131 PetriNetUnfolder]: For 126496/126498 co-relation queries the response was YES. [2023-09-01 02:00:29,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35700 conditions, 3392 events. 1692/3392 cut-off events. For 126496/126498 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 25088 event pairs, 124 based on Foata normal form. 5/3392 useless extension candidates. Maximal degree in co-relation 35551. Up to 3025 conditions per place. [2023-09-01 02:00:29,683 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 652 selfloop transitions, 102 changer transitions 9/773 dead transitions. [2023-09-01 02:00:29,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 773 transitions, 19797 flow [2023-09-01 02:00:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:00:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:00:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1616 transitions. [2023-09-01 02:00:29,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40994419076610855 [2023-09-01 02:00:29,685 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1616 transitions. [2023-09-01 02:00:29,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1616 transitions. [2023-09-01 02:00:29,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:29,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1616 transitions. [2023-09-01 02:00:29,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.55555555555554) internal successors, (1616), 9 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:29,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:29,688 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:29,688 INFO L175 Difference]: Start difference. First operand has 418 places, 738 transitions, 18035 flow. Second operand 9 states and 1616 transitions. [2023-09-01 02:00:29,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 773 transitions, 19797 flow [2023-09-01 02:00:31,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 773 transitions, 19481 flow, removed 74 selfloop flow, removed 7 redundant places. [2023-09-01 02:00:31,047 INFO L231 Difference]: Finished difference. Result has 420 places, 738 transitions, 17995 flow [2023-09-01 02:00:31,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=17723, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17995, PETRI_PLACES=420, PETRI_TRANSITIONS=738} [2023-09-01 02:00:31,048 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 391 predicate places. [2023-09-01 02:00:31,048 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 738 transitions, 17995 flow [2023-09-01 02:00:31,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 175.11764705882354) internal successors, (2977), 17 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:31,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:31,049 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:31,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-09-01 02:00:31,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:31,250 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:00:31,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:31,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2026140096, now seen corresponding path program 46 times [2023-09-01 02:00:31,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:31,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706370092] [2023-09-01 02:00:31,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:31,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:31,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:31,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706370092] [2023-09-01 02:00:31,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706370092] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:31,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536321150] [2023-09-01 02:00:31,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:00:31,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:31,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:31,317 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:00:31,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-09-01 02:00:31,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:00:31,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:00:31,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:00:31,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:31,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:31,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536321150] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:31,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:31,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-09-01 02:00:31,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858577042] [2023-09-01 02:00:31,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:31,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 02:00:31,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:31,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 02:00:31,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-09-01 02:00:31,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:00:31,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 738 transitions, 17995 flow. Second operand has 14 states, 14 states have (on average 183.07142857142858) internal successors, (2563), 14 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:31,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:31,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:00:31,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:33,302 INFO L130 PetriNetUnfolder]: 2248/4521 cut-off events. [2023-09-01 02:00:33,302 INFO L131 PetriNetUnfolder]: For 176783/176783 co-relation queries the response was YES. [2023-09-01 02:00:33,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47225 conditions, 4521 events. 2248/4521 cut-off events. For 176783/176783 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 35174 event pairs, 194 based on Foata normal form. 36/4557 useless extension candidates. Maximal degree in co-relation 47075. Up to 2645 conditions per place. [2023-09-01 02:00:33,361 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 751 selfloop transitions, 266 changer transitions 0/1017 dead transitions. [2023-09-01 02:00:33,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 1017 transitions, 26523 flow [2023-09-01 02:00:33,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:00:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:00:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1695 transitions. [2023-09-01 02:00:33,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299847792998478 [2023-09-01 02:00:33,362 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1695 transitions. [2023-09-01 02:00:33,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1695 transitions. [2023-09-01 02:00:33,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:33,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1695 transitions. [2023-09-01 02:00:33,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 188.33333333333334) internal successors, (1695), 9 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:33,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:33,365 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:33,365 INFO L175 Difference]: Start difference. First operand has 420 places, 738 transitions, 17995 flow. Second operand 9 states and 1695 transitions. [2023-09-01 02:00:33,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 1017 transitions, 26523 flow [2023-09-01 02:00:35,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1017 transitions, 26282 flow, removed 21 selfloop flow, removed 6 redundant places. [2023-09-01 02:00:35,134 INFO L231 Difference]: Finished difference. Result has 426 places, 855 transitions, 21922 flow [2023-09-01 02:00:35,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=17811, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21922, PETRI_PLACES=426, PETRI_TRANSITIONS=855} [2023-09-01 02:00:35,135 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 397 predicate places. [2023-09-01 02:00:35,135 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 855 transitions, 21922 flow [2023-09-01 02:00:35,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 183.07142857142858) internal successors, (2563), 14 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:35,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:35,135 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:35,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-09-01 02:00:35,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-09-01 02:00:35,336 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:00:35,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:35,336 INFO L85 PathProgramCache]: Analyzing trace with hash 2007048997, now seen corresponding path program 47 times [2023-09-01 02:00:35,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:35,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139420661] [2023-09-01 02:00:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:35,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:35,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:35,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139420661] [2023-09-01 02:00:35,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139420661] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:35,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944386695] [2023-09-01 02:00:35,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:00:35,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:35,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:35,407 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:00:35,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-09-01 02:00:35,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 02:00:35,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:00:35,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:00:35,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:35,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:35,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944386695] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:35,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:35,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-09-01 02:00:35,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418801014] [2023-09-01 02:00:35,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:35,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 02:00:35,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:35,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 02:00:35,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-09-01 02:00:35,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:00:35,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 855 transitions, 21922 flow. Second operand has 14 states, 14 states have (on average 183.07142857142858) internal successors, (2563), 14 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:35,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:35,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:00:35,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:37,575 INFO L130 PetriNetUnfolder]: 2253/4538 cut-off events. [2023-09-01 02:00:37,575 INFO L131 PetriNetUnfolder]: For 184103/184103 co-relation queries the response was YES. [2023-09-01 02:00:37,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48409 conditions, 4538 events. 2253/4538 cut-off events. For 184103/184103 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 35184 event pairs, 376 based on Foata normal form. 4/4542 useless extension candidates. Maximal degree in co-relation 48255. Up to 1744 conditions per place. [2023-09-01 02:00:37,645 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 603 selfloop transitions, 403 changer transitions 15/1021 dead transitions. [2023-09-01 02:00:37,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1021 transitions, 27454 flow [2023-09-01 02:00:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 02:00:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 02:00:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2609 transitions. [2023-09-01 02:00:37,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254729288975864 [2023-09-01 02:00:37,647 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2609 transitions. [2023-09-01 02:00:37,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2609 transitions. [2023-09-01 02:00:37,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:37,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2609 transitions. [2023-09-01 02:00:37,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.35714285714286) internal successors, (2609), 14 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:37,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:37,652 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:37,652 INFO L175 Difference]: Start difference. First operand has 426 places, 855 transitions, 21922 flow. Second operand 14 states and 2609 transitions. [2023-09-01 02:00:37,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1021 transitions, 27454 flow [2023-09-01 02:00:39,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 1021 transitions, 27225 flow, removed 46 selfloop flow, removed 3 redundant places. [2023-09-01 02:00:39,824 INFO L231 Difference]: Finished difference. Result has 441 places, 919 transitions, 24667 flow [2023-09-01 02:00:39,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=21693, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=24667, PETRI_PLACES=441, PETRI_TRANSITIONS=919} [2023-09-01 02:00:39,825 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 412 predicate places. [2023-09-01 02:00:39,825 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 919 transitions, 24667 flow [2023-09-01 02:00:39,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 183.07142857142858) internal successors, (2563), 14 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:39,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:39,825 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:39,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-09-01 02:00:40,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:40,026 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:00:40,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:40,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1466421474, now seen corresponding path program 48 times [2023-09-01 02:00:40,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:40,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919745519] [2023-09-01 02:00:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:40,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:40,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:40,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919745519] [2023-09-01 02:00:40,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919745519] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:40,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777630088] [2023-09-01 02:00:40,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 02:00:40,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:40,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:40,110 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:00:40,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-09-01 02:00:40,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 02:00:40,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:00:40,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:00:40,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:40,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:40,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777630088] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:40,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:40,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 02:00:40,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546607530] [2023-09-01 02:00:40,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:40,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 02:00:40,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:40,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 02:00:40,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-09-01 02:00:40,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:00:40,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 919 transitions, 24667 flow. Second operand has 15 states, 15 states have (on average 183.06666666666666) internal successors, (2746), 15 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:40,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:40,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:00:40,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:42,663 INFO L130 PetriNetUnfolder]: 2489/5028 cut-off events. [2023-09-01 02:00:42,664 INFO L131 PetriNetUnfolder]: For 238585/238585 co-relation queries the response was YES. [2023-09-01 02:00:42,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55901 conditions, 5028 events. 2489/5028 cut-off events. For 238585/238585 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 40192 event pairs, 176 based on Foata normal form. 62/5090 useless extension candidates. Maximal degree in co-relation 55742. Up to 3409 conditions per place. [2023-09-01 02:00:42,759 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 788 selfloop transitions, 311 changer transitions 0/1099 dead transitions. [2023-09-01 02:00:42,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1099 transitions, 30569 flow [2023-09-01 02:00:42,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 02:00:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 02:00:42,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4127 transitions. [2023-09-01 02:00:42,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42828974678289744 [2023-09-01 02:00:42,761 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4127 transitions. [2023-09-01 02:00:42,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4127 transitions. [2023-09-01 02:00:42,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:42,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4127 transitions. [2023-09-01 02:00:42,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 187.5909090909091) internal successors, (4127), 22 states have internal predecessors, (4127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:42,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 438.0) internal successors, (10074), 23 states have internal predecessors, (10074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:42,909 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 438.0) internal successors, (10074), 23 states have internal predecessors, (10074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:42,909 INFO L175 Difference]: Start difference. First operand has 441 places, 919 transitions, 24667 flow. Second operand 22 states and 4127 transitions. [2023-09-01 02:00:42,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1099 transitions, 30569 flow [2023-09-01 02:00:45,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1099 transitions, 29671 flow, removed 258 selfloop flow, removed 8 redundant places. [2023-09-01 02:00:45,385 INFO L231 Difference]: Finished difference. Result has 460 places, 995 transitions, 26815 flow [2023-09-01 02:00:45,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=23780, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=26815, PETRI_PLACES=460, PETRI_TRANSITIONS=995} [2023-09-01 02:00:45,387 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 431 predicate places. [2023-09-01 02:00:45,387 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 995 transitions, 26815 flow [2023-09-01 02:00:45,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 183.06666666666666) internal successors, (2746), 15 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:45,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:45,388 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:45,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-09-01 02:00:45,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:45,590 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:00:45,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:45,590 INFO L85 PathProgramCache]: Analyzing trace with hash 335477113, now seen corresponding path program 49 times [2023-09-01 02:00:45,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:45,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535828227] [2023-09-01 02:00:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:45,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:45,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:45,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535828227] [2023-09-01 02:00:45,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535828227] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:45,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889765041] [2023-09-01 02:00:45,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 02:00:45,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:45,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:45,669 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:00:45,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-09-01 02:00:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:45,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:00:45,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:45,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:45,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889765041] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:45,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:45,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 02:00:45,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93060619] [2023-09-01 02:00:45,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:45,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:00:45,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:45,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:00:45,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:00:45,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:00:45,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 995 transitions, 26815 flow. Second operand has 16 states, 16 states have (on average 182.75) internal successors, (2924), 16 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:45,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:45,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:00:45,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:48,552 INFO L130 PetriNetUnfolder]: 2497/5086 cut-off events. [2023-09-01 02:00:48,552 INFO L131 PetriNetUnfolder]: For 243454/243454 co-relation queries the response was YES. [2023-09-01 02:00:48,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57438 conditions, 5086 events. 2497/5086 cut-off events. For 243454/243454 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 40971 event pairs, 410 based on Foata normal form. 24/5110 useless extension candidates. Maximal degree in co-relation 57272. Up to 2082 conditions per place. [2023-09-01 02:00:48,638 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 650 selfloop transitions, 473 changer transitions 12/1135 dead transitions. [2023-09-01 02:00:48,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 1135 transitions, 31289 flow [2023-09-01 02:00:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 02:00:48,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 02:00:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4837 transitions. [2023-09-01 02:00:48,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42474534597822267 [2023-09-01 02:00:48,641 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4837 transitions. [2023-09-01 02:00:48,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4837 transitions. [2023-09-01 02:00:48,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:48,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4837 transitions. [2023-09-01 02:00:48,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 186.03846153846155) internal successors, (4837), 26 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:48,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 438.0) internal successors, (11826), 27 states have internal predecessors, (11826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:48,649 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 438.0) internal successors, (11826), 27 states have internal predecessors, (11826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:48,649 INFO L175 Difference]: Start difference. First operand has 460 places, 995 transitions, 26815 flow. Second operand 26 states and 4837 transitions. [2023-09-01 02:00:48,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 1135 transitions, 31289 flow [2023-09-01 02:00:51,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 1135 transitions, 30336 flow, removed 338 selfloop flow, removed 11 redundant places. [2023-09-01 02:00:51,582 INFO L231 Difference]: Finished difference. Result has 479 places, 1008 transitions, 27451 flow [2023-09-01 02:00:51,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=25837, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=993, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=27451, PETRI_PLACES=479, PETRI_TRANSITIONS=1008} [2023-09-01 02:00:51,583 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 450 predicate places. [2023-09-01 02:00:51,584 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 1008 transitions, 27451 flow [2023-09-01 02:00:51,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 182.75) internal successors, (2924), 16 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:51,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:51,584 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:51,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-09-01 02:00:51,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:51,789 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:00:51,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:51,790 INFO L85 PathProgramCache]: Analyzing trace with hash -512809607, now seen corresponding path program 50 times [2023-09-01 02:00:51,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:51,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688156684] [2023-09-01 02:00:51,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:51,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:51,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:51,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688156684] [2023-09-01 02:00:51,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688156684] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:51,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904591422] [2023-09-01 02:00:51,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:00:51,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:51,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:51,866 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:00:51,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-09-01 02:00:51,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:00:51,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:00:51,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:00:51,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:52,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:52,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904591422] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:52,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:52,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 02:00:52,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853454526] [2023-09-01 02:00:52,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:52,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 02:00:52,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:52,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 02:00:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-09-01 02:00:52,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:00:52,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 1008 transitions, 27451 flow. Second operand has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:52,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:52,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:00:52,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:55,229 INFO L130 PetriNetUnfolder]: 2844/5787 cut-off events. [2023-09-01 02:00:55,229 INFO L131 PetriNetUnfolder]: For 317521/317521 co-relation queries the response was YES. [2023-09-01 02:00:55,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67123 conditions, 5787 events. 2844/5787 cut-off events. For 317521/317521 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 47639 event pairs, 351 based on Foata normal form. 64/5851 useless extension candidates. Maximal degree in co-relation 66954. Up to 1725 conditions per place. [2023-09-01 02:00:55,319 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 672 selfloop transitions, 608 changer transitions 8/1288 dead transitions. [2023-09-01 02:00:55,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1288 transitions, 35871 flow [2023-09-01 02:00:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 02:00:55,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 02:00:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5781 transitions. [2023-09-01 02:00:55,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257622624834291 [2023-09-01 02:00:55,322 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5781 transitions. [2023-09-01 02:00:55,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5781 transitions. [2023-09-01 02:00:55,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:55,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5781 transitions. [2023-09-01 02:00:55,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 186.48387096774192) internal successors, (5781), 31 states have internal predecessors, (5781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:55,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 438.0) internal successors, (14016), 32 states have internal predecessors, (14016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:55,333 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 438.0) internal successors, (14016), 32 states have internal predecessors, (14016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:55,333 INFO L175 Difference]: Start difference. First operand has 479 places, 1008 transitions, 27451 flow. Second operand 31 states and 5781 transitions. [2023-09-01 02:00:55,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1288 transitions, 35871 flow [2023-09-01 02:00:58,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 1288 transitions, 35139 flow, removed 136 selfloop flow, removed 11 redundant places. [2023-09-01 02:00:58,613 INFO L231 Difference]: Finished difference. Result has 503 places, 1114 transitions, 31841 flow [2023-09-01 02:00:58,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=26241, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=494, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=31841, PETRI_PLACES=503, PETRI_TRANSITIONS=1114} [2023-09-01 02:00:58,614 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 474 predicate places. [2023-09-01 02:00:58,614 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 1114 transitions, 31841 flow [2023-09-01 02:00:58,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:58,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:58,615 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:58,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-09-01 02:00:58,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:58,815 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:00:58,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:58,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1490593063, now seen corresponding path program 51 times [2023-09-01 02:00:58,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:58,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70810835] [2023-09-01 02:00:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:58,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:58,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:58,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70810835] [2023-09-01 02:00:58,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70810835] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:58,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928749006] [2023-09-01 02:00:58,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:00:58,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:58,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:58,883 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:00:58,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-09-01 02:00:58,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 02:00:58,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:00:58,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:00:58,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:59,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:59,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928749006] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:59,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:59,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 02:00:59,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366707298] [2023-09-01 02:00:59,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:59,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 02:00:59,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:59,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 02:00:59,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-09-01 02:00:59,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:00:59,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 1114 transitions, 31841 flow. Second operand has 15 states, 15 states have (on average 182.93333333333334) internal successors, (2744), 15 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:00:59,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:59,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:00:59,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:02,131 INFO L130 PetriNetUnfolder]: 2972/6033 cut-off events. [2023-09-01 02:01:02,131 INFO L131 PetriNetUnfolder]: For 371413/371413 co-relation queries the response was YES. [2023-09-01 02:01:02,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72866 conditions, 6033 events. 2972/6033 cut-off events. For 371413/371413 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 49722 event pairs, 417 based on Foata normal form. 28/6061 useless extension candidates. Maximal degree in co-relation 72690. Up to 2145 conditions per place. [2023-09-01 02:01:02,246 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 716 selfloop transitions, 569 changer transitions 14/1299 dead transitions. [2023-09-01 02:01:02,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 1299 transitions, 38446 flow [2023-09-01 02:01:02,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 02:01:02,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 02:01:02,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5028 transitions. [2023-09-01 02:01:02,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42516489091831555 [2023-09-01 02:01:02,248 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5028 transitions. [2023-09-01 02:01:02,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5028 transitions. [2023-09-01 02:01:02,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:01:02,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5028 transitions. [2023-09-01 02:01:02,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 186.22222222222223) internal successors, (5028), 27 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:02,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 438.0) internal successors, (12264), 28 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:02,257 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 438.0) internal successors, (12264), 28 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:02,257 INFO L175 Difference]: Start difference. First operand has 503 places, 1114 transitions, 31841 flow. Second operand 27 states and 5028 transitions. [2023-09-01 02:01:02,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 1299 transitions, 38446 flow [2023-09-01 02:01:06,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 1299 transitions, 36485 flow, removed 780 selfloop flow, removed 18 redundant places. [2023-09-01 02:01:06,813 INFO L231 Difference]: Finished difference. Result has 515 places, 1141 transitions, 32880 flow [2023-09-01 02:01:06,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=30234, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=526, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=32880, PETRI_PLACES=515, PETRI_TRANSITIONS=1141} [2023-09-01 02:01:06,815 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 486 predicate places. [2023-09-01 02:01:06,815 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 1141 transitions, 32880 flow [2023-09-01 02:01:06,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.93333333333334) internal successors, (2744), 15 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:06,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:06,816 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:01:06,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-09-01 02:01:07,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-09-01 02:01:07,020 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:01:07,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:07,021 INFO L85 PathProgramCache]: Analyzing trace with hash -522323943, now seen corresponding path program 52 times [2023-09-01 02:01:07,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:07,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276829281] [2023-09-01 02:01:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:07,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:07,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:07,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276829281] [2023-09-01 02:01:07,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276829281] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:01:07,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319559952] [2023-09-01 02:01:07,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:01:07,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:07,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:01:07,092 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:01:07,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-09-01 02:01:07,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:01:07,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:01:07,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:01:07,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:01:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:07,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:01:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:07,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319559952] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:01:07,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:01:07,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 02:01:07,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984646091] [2023-09-01 02:01:07,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:01:07,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 02:01:07,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:07,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 02:01:07,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-09-01 02:01:07,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:01:07,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 1141 transitions, 32880 flow. Second operand has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:07,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:01:07,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:01:07,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:10,763 INFO L130 PetriNetUnfolder]: 2957/6050 cut-off events. [2023-09-01 02:01:10,763 INFO L131 PetriNetUnfolder]: For 349447/349447 co-relation queries the response was YES. [2023-09-01 02:01:10,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71391 conditions, 6050 events. 2957/6050 cut-off events. For 349447/349447 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 50185 event pairs, 562 based on Foata normal form. 36/6086 useless extension candidates. Maximal degree in co-relation 71210. Up to 2754 conditions per place. [2023-09-01 02:01:10,862 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 777 selfloop transitions, 492 changer transitions 1/1270 dead transitions. [2023-09-01 02:01:10,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 1270 transitions, 37681 flow [2023-09-01 02:01:10,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 02:01:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 02:01:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4106 transitions. [2023-09-01 02:01:10,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261104192611042 [2023-09-01 02:01:10,872 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4106 transitions. [2023-09-01 02:01:10,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4106 transitions. [2023-09-01 02:01:10,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:01:10,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4106 transitions. [2023-09-01 02:01:10,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 186.63636363636363) internal successors, (4106), 22 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:10,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 438.0) internal successors, (10074), 23 states have internal predecessors, (10074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:10,879 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 438.0) internal successors, (10074), 23 states have internal predecessors, (10074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:10,879 INFO L175 Difference]: Start difference. First operand has 515 places, 1141 transitions, 32880 flow. Second operand 22 states and 4106 transitions. [2023-09-01 02:01:10,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 1270 transitions, 37681 flow [2023-09-01 02:01:14,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 1270 transitions, 36706 flow, removed 55 selfloop flow, removed 21 redundant places. [2023-09-01 02:01:14,859 INFO L231 Difference]: Finished difference. Result has 515 places, 1157 transitions, 33599 flow [2023-09-01 02:01:14,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=31537, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=33599, PETRI_PLACES=515, PETRI_TRANSITIONS=1157} [2023-09-01 02:01:14,861 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 486 predicate places. [2023-09-01 02:01:14,861 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 1157 transitions, 33599 flow [2023-09-01 02:01:14,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:14,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:14,862 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:01:14,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-09-01 02:01:15,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-09-01 02:01:15,067 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:01:15,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:15,067 INFO L85 PathProgramCache]: Analyzing trace with hash 538621454, now seen corresponding path program 53 times [2023-09-01 02:01:15,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:15,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294973952] [2023-09-01 02:01:15,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:15,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:15,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:15,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294973952] [2023-09-01 02:01:15,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294973952] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:01:15,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518941024] [2023-09-01 02:01:15,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:01:15,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:15,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:01:15,164 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:01:15,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-09-01 02:01:15,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 02:01:15,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:01:15,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:01:15,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:01:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:15,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:01:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:15,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518941024] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:01:15,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:01:15,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 02:01:15,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393637441] [2023-09-01 02:01:15,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:01:15,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 02:01:15,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:15,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 02:01:15,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-09-01 02:01:15,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:01:15,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 1157 transitions, 33599 flow. Second operand has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:15,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:01:15,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:01:15,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:18,619 INFO L130 PetriNetUnfolder]: 2910/5905 cut-off events. [2023-09-01 02:01:18,619 INFO L131 PetriNetUnfolder]: For 319202/319202 co-relation queries the response was YES. [2023-09-01 02:01:18,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70329 conditions, 5905 events. 2910/5905 cut-off events. For 319202/319202 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 48401 event pairs, 80 based on Foata normal form. 26/5931 useless extension candidates. Maximal degree in co-relation 70146. Up to 1670 conditions per place. [2023-09-01 02:01:18,726 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 733 selfloop transitions, 510 changer transitions 5/1248 dead transitions. [2023-09-01 02:01:18,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 1248 transitions, 37735 flow [2023-09-01 02:01:18,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 02:01:18,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 02:01:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5205 transitions. [2023-09-01 02:01:18,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424412915851272 [2023-09-01 02:01:18,729 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5205 transitions. [2023-09-01 02:01:18,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5205 transitions. [2023-09-01 02:01:18,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:01:18,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5205 transitions. [2023-09-01 02:01:18,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 185.89285714285714) internal successors, (5205), 28 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:18,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 438.0) internal successors, (12702), 29 states have internal predecessors, (12702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:18,738 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 438.0) internal successors, (12702), 29 states have internal predecessors, (12702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:18,738 INFO L175 Difference]: Start difference. First operand has 515 places, 1157 transitions, 33599 flow. Second operand 28 states and 5205 transitions. [2023-09-01 02:01:18,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 1248 transitions, 37735 flow [2023-09-01 02:01:23,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 1248 transitions, 36791 flow, removed 160 selfloop flow, removed 12 redundant places. [2023-09-01 02:01:23,036 INFO L231 Difference]: Finished difference. Result has 532 places, 1167 transitions, 34352 flow [2023-09-01 02:01:23,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=31945, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=484, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=34352, PETRI_PLACES=532, PETRI_TRANSITIONS=1167} [2023-09-01 02:01:23,037 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 503 predicate places. [2023-09-01 02:01:23,037 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 1167 transitions, 34352 flow [2023-09-01 02:01:23,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:23,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:23,038 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:01:23,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-09-01 02:01:23,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-09-01 02:01:23,239 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:01:23,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:23,239 INFO L85 PathProgramCache]: Analyzing trace with hash 641670866, now seen corresponding path program 54 times [2023-09-01 02:01:23,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:23,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347911086] [2023-09-01 02:01:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:23,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:01:23,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:23,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347911086] [2023-09-01 02:01:23,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347911086] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:01:23,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202090881] [2023-09-01 02:01:23,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 02:01:23,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:23,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:01:23,353 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:01:23,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-09-01 02:01:23,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 02:01:23,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:01:23,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:01:23,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:01:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:23,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:01:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:01:23,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202090881] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:01:23,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:01:23,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-09-01 02:01:23,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410741846] [2023-09-01 02:01:23,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:01:23,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 02:01:23,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:23,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 02:01:23,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-09-01 02:01:23,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:01:23,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1167 transitions, 34352 flow. Second operand has 15 states, 15 states have (on average 182.86666666666667) internal successors, (2743), 15 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:23,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:01:23,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:01:23,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:27,712 INFO L130 PetriNetUnfolder]: 3372/6853 cut-off events. [2023-09-01 02:01:27,712 INFO L131 PetriNetUnfolder]: For 416363/416363 co-relation queries the response was YES. [2023-09-01 02:01:27,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84511 conditions, 6853 events. 3372/6853 cut-off events. For 416363/416363 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 57864 event pairs, 150 based on Foata normal form. 52/6905 useless extension candidates. Maximal degree in co-relation 84328. Up to 2007 conditions per place. [2023-09-01 02:01:27,831 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 784 selfloop transitions, 652 changer transitions 5/1441 dead transitions. [2023-09-01 02:01:27,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1441 transitions, 44486 flow [2023-09-01 02:01:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 02:01:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 02:01:27,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 6145 transitions. [2023-09-01 02:01:27,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251418292514183 [2023-09-01 02:01:27,835 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 6145 transitions. [2023-09-01 02:01:27,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 6145 transitions. [2023-09-01 02:01:27,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:01:27,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 6145 transitions. [2023-09-01 02:01:27,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 186.21212121212122) internal successors, (6145), 33 states have internal predecessors, (6145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:27,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 438.0) internal successors, (14892), 34 states have internal predecessors, (14892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:27,846 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 438.0) internal successors, (14892), 34 states have internal predecessors, (14892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:27,846 INFO L175 Difference]: Start difference. First operand has 532 places, 1167 transitions, 34352 flow. Second operand 33 states and 6145 transitions. [2023-09-01 02:01:27,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1441 transitions, 44486 flow [2023-09-01 02:01:33,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 1441 transitions, 42665 flow, removed 629 selfloop flow, removed 12 redundant places. [2023-09-01 02:01:33,464 INFO L231 Difference]: Finished difference. Result has 559 places, 1313 transitions, 39944 flow [2023-09-01 02:01:33,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=32217, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=500, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=39944, PETRI_PLACES=559, PETRI_TRANSITIONS=1313} [2023-09-01 02:01:33,465 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 530 predicate places. [2023-09-01 02:01:33,465 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 1313 transitions, 39944 flow [2023-09-01 02:01:33,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.86666666666667) internal successors, (2743), 15 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:33,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:33,466 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:01:33,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-09-01 02:01:33,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:33,671 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:01:33,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:33,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2062801614, now seen corresponding path program 55 times [2023-09-01 02:01:33,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:33,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605381694] [2023-09-01 02:01:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:33,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:33,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:33,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605381694] [2023-09-01 02:01:33,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605381694] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:01:33,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705772335] [2023-09-01 02:01:33,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 02:01:33,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:33,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:01:33,758 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:01:33,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-09-01 02:01:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:33,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:01:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:01:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:33,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:01:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:33,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705772335] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:01:33,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:01:33,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-09-01 02:01:33,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615916867] [2023-09-01 02:01:33,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:01:33,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 02:01:33,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:33,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 02:01:33,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-09-01 02:01:34,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:01:34,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 1313 transitions, 39944 flow. Second operand has 15 states, 15 states have (on average 182.86666666666667) internal successors, (2743), 15 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:34,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:01:34,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:01:34,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:38,327 INFO L130 PetriNetUnfolder]: 3483/7040 cut-off events. [2023-09-01 02:01:38,327 INFO L131 PetriNetUnfolder]: For 427999/427999 co-relation queries the response was YES. [2023-09-01 02:01:38,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87419 conditions, 7040 events. 3483/7040 cut-off events. For 427999/427999 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 59368 event pairs, 276 based on Foata normal form. 84/7124 useless extension candidates. Maximal degree in co-relation 87232. Up to 5459 conditions per place. [2023-09-01 02:01:38,449 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1138 selfloop transitions, 311 changer transitions 1/1450 dead transitions. [2023-09-01 02:01:38,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1450 transitions, 45451 flow [2023-09-01 02:01:38,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 02:01:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 02:01:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3929 transitions. [2023-09-01 02:01:38,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42715807784300935 [2023-09-01 02:01:38,452 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3929 transitions. [2023-09-01 02:01:38,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3929 transitions. [2023-09-01 02:01:38,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:01:38,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3929 transitions. [2023-09-01 02:01:38,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 187.0952380952381) internal successors, (3929), 21 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:38,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:38,458 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:38,458 INFO L175 Difference]: Start difference. First operand has 559 places, 1313 transitions, 39944 flow. Second operand 21 states and 3929 transitions. [2023-09-01 02:01:38,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1450 transitions, 45451 flow [2023-09-01 02:01:44,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 1450 transitions, 43935 flow, removed 659 selfloop flow, removed 18 redundant places. [2023-09-01 02:01:44,768 INFO L231 Difference]: Finished difference. Result has 566 places, 1364 transitions, 40626 flow [2023-09-01 02:01:44,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=38269, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1044, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=40626, PETRI_PLACES=566, PETRI_TRANSITIONS=1364} [2023-09-01 02:01:44,769 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 537 predicate places. [2023-09-01 02:01:44,769 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 1364 transitions, 40626 flow [2023-09-01 02:01:44,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.86666666666667) internal successors, (2743), 15 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:44,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:44,770 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:01:44,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-09-01 02:01:44,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:44,976 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:01:44,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:44,976 INFO L85 PathProgramCache]: Analyzing trace with hash 468229150, now seen corresponding path program 56 times [2023-09-01 02:01:44,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:44,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695459556] [2023-09-01 02:01:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:44,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:45,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:45,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695459556] [2023-09-01 02:01:45,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695459556] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:01:45,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399361862] [2023-09-01 02:01:45,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:01:45,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:45,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:01:45,050 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:01:45,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-09-01 02:01:45,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:01:45,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:01:45,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:01:45,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:01:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:45,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:01:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:45,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399361862] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:01:45,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:01:45,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-09-01 02:01:45,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179983626] [2023-09-01 02:01:45,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:01:45,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 02:01:45,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:45,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 02:01:45,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-09-01 02:01:45,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:01:45,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 1364 transitions, 40626 flow. Second operand has 15 states, 15 states have (on average 183.06666666666666) internal successors, (2746), 15 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:45,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:01:45,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:01:45,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:49,300 INFO L130 PetriNetUnfolder]: 3431/6934 cut-off events. [2023-09-01 02:01:49,300 INFO L131 PetriNetUnfolder]: For 387869/387869 co-relation queries the response was YES. [2023-09-01 02:01:49,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84361 conditions, 6934 events. 3431/6934 cut-off events. For 387869/387869 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 58396 event pairs, 180 based on Foata normal form. 122/7056 useless extension candidates. Maximal degree in co-relation 84170. Up to 3193 conditions per place. [2023-09-01 02:01:49,581 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 904 selfloop transitions, 548 changer transitions 0/1452 dead transitions. [2023-09-01 02:01:49,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 1452 transitions, 44529 flow [2023-09-01 02:01:49,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 02:01:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 02:01:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4307 transitions. [2023-09-01 02:01:49,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427536231884058 [2023-09-01 02:01:49,585 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4307 transitions. [2023-09-01 02:01:49,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4307 transitions. [2023-09-01 02:01:49,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:01:49,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4307 transitions. [2023-09-01 02:01:49,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 187.2608695652174) internal successors, (4307), 23 states have internal predecessors, (4307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:49,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 438.0) internal successors, (10512), 24 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:49,595 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 438.0) internal successors, (10512), 24 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:49,595 INFO L175 Difference]: Start difference. First operand has 566 places, 1364 transitions, 40626 flow. Second operand 23 states and 4307 transitions. [2023-09-01 02:01:49,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 1452 transitions, 44529 flow [2023-09-01 02:01:54,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 1452 transitions, 43980 flow, removed 91 selfloop flow, removed 14 redundant places. [2023-09-01 02:01:54,961 INFO L231 Difference]: Finished difference. Result has 575 places, 1340 transitions, 40738 flow [2023-09-01 02:01:54,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=38846, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=788, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=40738, PETRI_PLACES=575, PETRI_TRANSITIONS=1340} [2023-09-01 02:01:54,962 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 546 predicate places. [2023-09-01 02:01:54,963 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 1340 transitions, 40738 flow [2023-09-01 02:01:54,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 183.06666666666666) internal successors, (2746), 15 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:54,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:54,963 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:01:54,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-09-01 02:01:55,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:55,164 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:01:55,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:55,164 INFO L85 PathProgramCache]: Analyzing trace with hash 936615282, now seen corresponding path program 57 times [2023-09-01 02:01:55,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:55,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031569315] [2023-09-01 02:01:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:55,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:55,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:55,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031569315] [2023-09-01 02:01:55,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031569315] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:01:55,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465700646] [2023-09-01 02:01:55,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:01:55,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:55,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:01:55,232 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:01:55,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-09-01 02:01:55,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 02:01:55,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:01:55,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:01:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:01:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:55,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:01:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:55,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465700646] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:01:55,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:01:55,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 02:01:55,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043316222] [2023-09-01 02:01:55,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:01:55,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:01:55,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:55,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:01:55,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:01:55,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:01:55,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 1340 transitions, 40738 flow. Second operand has 16 states, 16 states have (on average 182.75) internal successors, (2924), 16 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:01:55,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:01:55,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:01:55,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:59,875 INFO L130 PetriNetUnfolder]: 3509/7064 cut-off events. [2023-09-01 02:01:59,875 INFO L131 PetriNetUnfolder]: For 402281/402281 co-relation queries the response was YES. [2023-09-01 02:01:59,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87762 conditions, 7064 events. 3509/7064 cut-off events. For 402281/402281 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 59350 event pairs, 170 based on Foata normal form. 14/7078 useless extension candidates. Maximal degree in co-relation 87572. Up to 2359 conditions per place. [2023-09-01 02:02:00,004 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 776 selfloop transitions, 676 changer transitions 9/1461 dead transitions. [2023-09-01 02:02:00,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 1461 transitions, 46169 flow [2023-09-01 02:02:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 02:02:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 02:02:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5568 transitions. [2023-09-01 02:02:00,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4237442922374429 [2023-09-01 02:02:00,008 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5568 transitions. [2023-09-01 02:02:00,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5568 transitions. [2023-09-01 02:02:00,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:02:00,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5568 transitions. [2023-09-01 02:02:00,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 185.6) internal successors, (5568), 30 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:00,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 438.0) internal successors, (13578), 31 states have internal predecessors, (13578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:00,019 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 438.0) internal successors, (13578), 31 states have internal predecessors, (13578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:00,019 INFO L175 Difference]: Start difference. First operand has 575 places, 1340 transitions, 40738 flow. Second operand 30 states and 5568 transitions. [2023-09-01 02:02:00,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 1461 transitions, 46169 flow [2023-09-01 02:02:05,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 1461 transitions, 45733 flow, removed 63 selfloop flow, removed 12 redundant places. [2023-09-01 02:02:05,933 INFO L231 Difference]: Finished difference. Result has 599 places, 1370 transitions, 43535 flow [2023-09-01 02:02:05,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=40191, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=635, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=43535, PETRI_PLACES=599, PETRI_TRANSITIONS=1370} [2023-09-01 02:02:05,933 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 570 predicate places. [2023-09-01 02:02:05,934 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 1370 transitions, 43535 flow [2023-09-01 02:02:05,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 182.75) internal successors, (2924), 16 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:05,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:02:05,934 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:02:05,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-09-01 02:02:06,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:06,135 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:02:06,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:02:06,135 INFO L85 PathProgramCache]: Analyzing trace with hash 389522062, now seen corresponding path program 58 times [2023-09-01 02:02:06,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:02:06,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264249521] [2023-09-01 02:02:06,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:02:06,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:02:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:02:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:06,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:02:06,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264249521] [2023-09-01 02:02:06,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264249521] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:02:06,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160791309] [2023-09-01 02:02:06,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:02:06,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:06,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:02:06,219 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:02:06,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-09-01 02:02:06,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:02:06,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:02:06,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:02:06,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:02:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:06,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:02:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:06,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160791309] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:02:06,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:02:06,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-09-01 02:02:06,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185015542] [2023-09-01 02:02:06,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:02:06,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 02:02:06,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:02:06,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 02:02:06,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-09-01 02:02:06,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:02:06,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 1370 transitions, 43535 flow. Second operand has 20 states, 20 states have (on average 182.55) internal successors, (3651), 20 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:06,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:02:06,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:02:06,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:02:11,569 INFO L130 PetriNetUnfolder]: 3769/7634 cut-off events. [2023-09-01 02:02:11,570 INFO L131 PetriNetUnfolder]: For 510832/510832 co-relation queries the response was YES. [2023-09-01 02:02:11,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99692 conditions, 7634 events. 3769/7634 cut-off events. For 510832/510832 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 65391 event pairs, 208 based on Foata normal form. 40/7674 useless extension candidates. Maximal degree in co-relation 99496. Up to 2196 conditions per place. [2023-09-01 02:02:11,701 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 747 selfloop transitions, 800 changer transitions 20/1567 dead transitions. [2023-09-01 02:02:11,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 1567 transitions, 52412 flow [2023-09-01 02:02:11,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 02:02:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 02:02:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 6310 transitions. [2023-09-01 02:02:11,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4237174321783508 [2023-09-01 02:02:11,705 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 6310 transitions. [2023-09-01 02:02:11,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 6310 transitions. [2023-09-01 02:02:11,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:02:11,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 6310 transitions. [2023-09-01 02:02:11,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 185.58823529411765) internal successors, (6310), 34 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:11,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 438.0) internal successors, (15330), 35 states have internal predecessors, (15330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:11,715 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 438.0) internal successors, (15330), 35 states have internal predecessors, (15330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:11,715 INFO L175 Difference]: Start difference. First operand has 599 places, 1370 transitions, 43535 flow. Second operand 34 states and 6310 transitions. [2023-09-01 02:02:11,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 1567 transitions, 52412 flow [2023-09-01 02:02:19,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 1567 transitions, 52011 flow, removed 116 selfloop flow, removed 13 redundant places. [2023-09-01 02:02:19,342 INFO L231 Difference]: Finished difference. Result has 624 places, 1454 transitions, 49419 flow [2023-09-01 02:02:19,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=42942, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=719, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=49419, PETRI_PLACES=624, PETRI_TRANSITIONS=1454} [2023-09-01 02:02:19,343 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 595 predicate places. [2023-09-01 02:02:19,343 INFO L495 AbstractCegarLoop]: Abstraction has has 624 places, 1454 transitions, 49419 flow [2023-09-01 02:02:19,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.55) internal successors, (3651), 20 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:19,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:02:19,344 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:02:19,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-09-01 02:02:19,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:19,544 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:02:19,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:02:19,544 INFO L85 PathProgramCache]: Analyzing trace with hash -632206374, now seen corresponding path program 59 times [2023-09-01 02:02:19,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:02:19,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719238916] [2023-09-01 02:02:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:02:19,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:02:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:02:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:19,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:02:19,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719238916] [2023-09-01 02:02:19,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719238916] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:02:19,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270037199] [2023-09-01 02:02:19,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:02:19,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:19,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:02:19,616 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:02:19,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-09-01 02:02:19,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 02:02:19,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:02:19,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:02:19,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:02:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:19,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:02:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:19,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270037199] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:02:19,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:02:19,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-09-01 02:02:19,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779861448] [2023-09-01 02:02:19,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:02:19,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 02:02:19,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:02:19,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 02:02:19,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-09-01 02:02:19,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:02:19,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 624 places, 1454 transitions, 49419 flow. Second operand has 17 states, 17 states have (on average 182.94117647058823) internal successors, (3110), 17 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:19,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:02:19,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:02:19,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:02:26,210 INFO L130 PetriNetUnfolder]: 4544/9247 cut-off events. [2023-09-01 02:02:26,210 INFO L131 PetriNetUnfolder]: For 700955/700955 co-relation queries the response was YES. [2023-09-01 02:02:26,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126116 conditions, 9247 events. 4544/9247 cut-off events. For 700955/700955 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 82374 event pairs, 264 based on Foata normal form. 42/9289 useless extension candidates. Maximal degree in co-relation 125914. Up to 3075 conditions per place. [2023-09-01 02:02:26,387 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 981 selfloop transitions, 880 changer transitions 0/1861 dead transitions. [2023-09-01 02:02:26,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 1861 transitions, 66146 flow [2023-09-01 02:02:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 02:02:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 02:02:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4496 transitions. [2023-09-01 02:02:26,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4277016742770167 [2023-09-01 02:02:26,390 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4496 transitions. [2023-09-01 02:02:26,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4496 transitions. [2023-09-01 02:02:26,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:02:26,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4496 transitions. [2023-09-01 02:02:26,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 187.33333333333334) internal successors, (4496), 24 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:26,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 438.0) internal successors, (10950), 25 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:26,397 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 438.0) internal successors, (10950), 25 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:26,397 INFO L175 Difference]: Start difference. First operand has 624 places, 1454 transitions, 49419 flow. Second operand 24 states and 4496 transitions. [2023-09-01 02:02:26,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 1861 transitions, 66146 flow [2023-09-01 02:02:39,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 1861 transitions, 64187 flow, removed 696 selfloop flow, removed 16 redundant places. [2023-09-01 02:02:39,563 INFO L231 Difference]: Finished difference. Result has 632 places, 1684 transitions, 59211 flow [2023-09-01 02:02:39,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=47281, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=667, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=731, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=59211, PETRI_PLACES=632, PETRI_TRANSITIONS=1684} [2023-09-01 02:02:39,564 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 603 predicate places. [2023-09-01 02:02:39,564 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 1684 transitions, 59211 flow [2023-09-01 02:02:39,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 182.94117647058823) internal successors, (3110), 17 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:39,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:02:39,565 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:02:39,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-09-01 02:02:39,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-09-01 02:02:39,771 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:02:39,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:02:39,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1579231018, now seen corresponding path program 60 times [2023-09-01 02:02:39,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:02:39,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876812409] [2023-09-01 02:02:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:02:39,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:02:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:02:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:39,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:02:39,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876812409] [2023-09-01 02:02:39,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876812409] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:02:39,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883589800] [2023-09-01 02:02:39,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 02:02:39,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:39,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:02:39,849 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:02:39,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-09-01 02:02:39,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 02:02:39,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:02:39,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:02:39,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:02:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:40,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:02:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:40,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883589800] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:02:40,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:02:40,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-09-01 02:02:40,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304818226] [2023-09-01 02:02:40,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:02:40,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 02:02:40,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:02:40,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 02:02:40,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-09-01 02:02:40,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:02:40,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 1684 transitions, 59211 flow. Second operand has 20 states, 20 states have (on average 182.8) internal successors, (3656), 20 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:40,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:02:40,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:02:40,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:02:47,488 INFO L130 PetriNetUnfolder]: 4770/9691 cut-off events. [2023-09-01 02:02:47,488 INFO L131 PetriNetUnfolder]: For 762649/762649 co-relation queries the response was YES. [2023-09-01 02:02:47,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133973 conditions, 9691 events. 4770/9691 cut-off events. For 762649/762649 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 86825 event pairs, 1823 based on Foata normal form. 106/9797 useless extension candidates. Maximal degree in co-relation 133766. Up to 8785 conditions per place. [2023-09-01 02:02:47,689 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1662 selfloop transitions, 188 changer transitions 0/1850 dead transitions. [2023-09-01 02:02:47,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 1850 transitions, 67529 flow [2023-09-01 02:02:47,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 02:02:47,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 02:02:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3941 transitions. [2023-09-01 02:02:47,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284627092846271 [2023-09-01 02:02:47,692 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3941 transitions. [2023-09-01 02:02:47,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3941 transitions. [2023-09-01 02:02:47,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:02:47,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3941 transitions. [2023-09-01 02:02:47,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 187.66666666666666) internal successors, (3941), 21 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:47,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:47,698 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:02:47,698 INFO L175 Difference]: Start difference. First operand has 632 places, 1684 transitions, 59211 flow. Second operand 21 states and 3941 transitions. [2023-09-01 02:02:47,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 1850 transitions, 67529 flow [2023-09-01 02:03:01,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 1850 transitions, 66265 flow, removed 524 selfloop flow, removed 11 redundant places. [2023-09-01 02:03:01,983 INFO L231 Difference]: Finished difference. Result has 650 places, 1768 transitions, 61993 flow [2023-09-01 02:03:01,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=57930, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=61993, PETRI_PLACES=650, PETRI_TRANSITIONS=1768} [2023-09-01 02:03:01,984 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 621 predicate places. [2023-09-01 02:03:01,984 INFO L495 AbstractCegarLoop]: Abstraction has has 650 places, 1768 transitions, 61993 flow [2023-09-01 02:03:01,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.8) internal successors, (3656), 20 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:03:01,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:03:01,985 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:03:01,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-09-01 02:03:02,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-09-01 02:03:02,186 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:03:02,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:03:02,186 INFO L85 PathProgramCache]: Analyzing trace with hash -949870662, now seen corresponding path program 61 times [2023-09-01 02:03:02,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:03:02,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027247078] [2023-09-01 02:03:02,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:03:02,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:03:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:03:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:03:02,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:03:02,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027247078] [2023-09-01 02:03:02,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027247078] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:03:02,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766027615] [2023-09-01 02:03:02,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 02:03:02,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:03:02,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:03:02,256 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:03:02,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-09-01 02:03:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:03:02,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:03:02,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:03:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:03:02,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:03:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:03:02,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766027615] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:03:02,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:03:02,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-09-01 02:03:02,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093872692] [2023-09-01 02:03:02,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:03:02,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 02:03:02,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:03:02,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 02:03:02,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-09-01 02:03:02,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:03:02,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 1768 transitions, 61993 flow. Second operand has 20 states, 20 states have (on average 182.55) internal successors, (3651), 20 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:03:02,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:03:02,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:03:02,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:03:11,163 INFO L130 PetriNetUnfolder]: 5144/10519 cut-off events. [2023-09-01 02:03:11,163 INFO L131 PetriNetUnfolder]: For 817510/817510 co-relation queries the response was YES. [2023-09-01 02:03:11,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145403 conditions, 10519 events. 5144/10519 cut-off events. For 817510/817510 co-relation queries the response was YES. Maximal size of possible extension queue 929. Compared 96328 event pairs, 770 based on Foata normal form. 48/10567 useless extension candidates. Maximal degree in co-relation 145188. Up to 3044 conditions per place. [2023-09-01 02:03:11,380 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1245 selfloop transitions, 788 changer transitions 18/2051 dead transitions. [2023-09-01 02:03:11,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 2051 transitions, 74389 flow [2023-09-01 02:03:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 02:03:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 02:03:11,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6875 transitions. [2023-09-01 02:03:11,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42422559545847216 [2023-09-01 02:03:11,384 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6875 transitions. [2023-09-01 02:03:11,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6875 transitions. [2023-09-01 02:03:11,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:03:11,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6875 transitions. [2023-09-01 02:03:11,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 185.8108108108108) internal successors, (6875), 37 states have internal predecessors, (6875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:03:11,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 438.0) internal successors, (16644), 38 states have internal predecessors, (16644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:03:11,397 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 438.0) internal successors, (16644), 38 states have internal predecessors, (16644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:03:11,397 INFO L175 Difference]: Start difference. First operand has 650 places, 1768 transitions, 61993 flow. Second operand 37 states and 6875 transitions. [2023-09-01 02:03:11,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 2051 transitions, 74389 flow [2023-09-01 02:03:27,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 682 places, 2051 transitions, 72608 flow, removed 868 selfloop flow, removed 4 redundant places. [2023-09-01 02:03:28,023 INFO L231 Difference]: Finished difference. Result has 696 places, 1917 transitions, 69452 flow [2023-09-01 02:03:28,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=60351, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=637, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1061, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=69452, PETRI_PLACES=696, PETRI_TRANSITIONS=1917} [2023-09-01 02:03:28,024 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 667 predicate places. [2023-09-01 02:03:28,024 INFO L495 AbstractCegarLoop]: Abstraction has has 696 places, 1917 transitions, 69452 flow [2023-09-01 02:03:28,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.55) internal successors, (3651), 20 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:03:28,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:03:28,025 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:03:28,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-09-01 02:03:28,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-09-01 02:03:28,225 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:03:28,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:03:28,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2134904985, now seen corresponding path program 62 times [2023-09-01 02:03:28,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:03:28,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201906284] [2023-09-01 02:03:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:03:28,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:03:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:03:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:03:28,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:03:28,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201906284] [2023-09-01 02:03:28,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201906284] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:03:28,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230571690] [2023-09-01 02:03:28,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:03:28,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:03:28,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:03:28,292 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:03:28,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-09-01 02:03:28,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:03:28,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:03:28,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:03:28,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:03:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:03:28,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:03:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:03:28,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230571690] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:03:28,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:03:28,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-09-01 02:03:28,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026788645] [2023-09-01 02:03:28,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:03:28,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 02:03:28,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:03:28,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 02:03:28,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-09-01 02:03:28,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:03:28,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 696 places, 1917 transitions, 69452 flow. Second operand has 17 states, 17 states have (on average 182.88235294117646) internal successors, (3109), 17 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:03:28,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:03:28,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:03:28,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:03:39,197 INFO L130 PetriNetUnfolder]: 5773/11796 cut-off events. [2023-09-01 02:03:39,197 INFO L131 PetriNetUnfolder]: For 1115695/1115695 co-relation queries the response was YES. [2023-09-01 02:03:39,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171322 conditions, 11796 events. 5773/11796 cut-off events. For 1115695/1115695 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 109920 event pairs, 487 based on Foata normal form. 62/11858 useless extension candidates. Maximal degree in co-relation 171092. Up to 7882 conditions per place. [2023-09-01 02:03:39,459 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 1687 selfloop transitions, 620 changer transitions 3/2310 dead transitions. [2023-09-01 02:03:39,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 2310 transitions, 88806 flow [2023-09-01 02:03:39,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 02:03:39,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 02:03:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4492 transitions. [2023-09-01 02:03:39,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273211567732116 [2023-09-01 02:03:39,462 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4492 transitions. [2023-09-01 02:03:39,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4492 transitions. [2023-09-01 02:03:39,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:03:39,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4492 transitions. [2023-09-01 02:03:39,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 187.16666666666666) internal successors, (4492), 24 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:03:39,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 438.0) internal successors, (10950), 25 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:03:39,470 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 438.0) internal successors, (10950), 25 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:03:39,470 INFO L175 Difference]: Start difference. First operand has 696 places, 1917 transitions, 69452 flow. Second operand 24 states and 4492 transitions. [2023-09-01 02:03:39,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 2310 transitions, 88806 flow [2023-09-01 02:04:03,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 2310 transitions, 83267 flow, removed 2445 selfloop flow, removed 13 redundant places. [2023-09-01 02:04:03,886 INFO L231 Difference]: Finished difference. Result has 713 places, 2126 transitions, 75678 flow [2023-09-01 02:04:03,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=66195, PETRI_DIFFERENCE_MINUEND_PLACES=682, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1907, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=75678, PETRI_PLACES=713, PETRI_TRANSITIONS=2126} [2023-09-01 02:04:03,887 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 684 predicate places. [2023-09-01 02:04:03,887 INFO L495 AbstractCegarLoop]: Abstraction has has 713 places, 2126 transitions, 75678 flow [2023-09-01 02:04:03,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 182.88235294117646) internal successors, (3109), 17 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:04:03,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:04:03,888 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:04:03,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-09-01 02:04:04,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2023-09-01 02:04:04,088 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:04:04,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:04:04,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1471728443, now seen corresponding path program 63 times [2023-09-01 02:04:04,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:04:04,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225099295] [2023-09-01 02:04:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:04:04,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:04:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:04:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:04:04,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:04:04,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225099295] [2023-09-01 02:04:04,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225099295] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:04:04,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132791108] [2023-09-01 02:04:04,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:04:04,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:04:04,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:04:04,157 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:04:04,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-09-01 02:04:04,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 02:04:04,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:04:04,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:04:04,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:04:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:04:04,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:04:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:04:04,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132791108] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:04:04,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:04:04,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-09-01 02:04:04,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490297878] [2023-09-01 02:04:04,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:04:04,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 02:04:04,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:04:04,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 02:04:04,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-09-01 02:04:04,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:04:04,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 713 places, 2126 transitions, 75678 flow. Second operand has 17 states, 17 states have (on average 182.8235294117647) internal successors, (3108), 17 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:04:04,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:04:04,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:04:04,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:04:16,451 INFO L130 PetriNetUnfolder]: 5915/12158 cut-off events. [2023-09-01 02:04:16,451 INFO L131 PetriNetUnfolder]: For 1087345/1087345 co-relation queries the response was YES. [2023-09-01 02:04:16,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173110 conditions, 12158 events. 5915/12158 cut-off events. For 1087345/1087345 co-relation queries the response was YES. Maximal size of possible extension queue 1070. Compared 114042 event pairs, 301 based on Foata normal form. 112/12270 useless extension candidates. Maximal degree in co-relation 172876. Up to 6125 conditions per place. [2023-09-01 02:04:16,715 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1549 selfloop transitions, 746 changer transitions 9/2304 dead transitions. [2023-09-01 02:04:16,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 2304 transitions, 85688 flow [2023-09-01 02:04:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 02:04:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 02:04:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 6315 transitions. [2023-09-01 02:04:16,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4240531829170024 [2023-09-01 02:04:16,718 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 6315 transitions. [2023-09-01 02:04:16,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 6315 transitions. [2023-09-01 02:04:16,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:04:16,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 6315 transitions. [2023-09-01 02:04:16,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 185.73529411764707) internal successors, (6315), 34 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:04:16,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 438.0) internal successors, (15330), 35 states have internal predecessors, (15330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:04:16,728 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 438.0) internal successors, (15330), 35 states have internal predecessors, (15330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:04:16,728 INFO L175 Difference]: Start difference. First operand has 713 places, 2126 transitions, 75678 flow. Second operand 34 states and 6315 transitions. [2023-09-01 02:04:16,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 2304 transitions, 85688 flow [2023-09-01 02:04:40,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 734 places, 2304 transitions, 83396 flow, removed 861 selfloop flow, removed 12 redundant places. [2023-09-01 02:04:40,075 INFO L231 Difference]: Finished difference. Result has 747 places, 2193 transitions, 79733 flow [2023-09-01 02:04:40,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=73322, PETRI_DIFFERENCE_MINUEND_PLACES=701, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=656, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=79733, PETRI_PLACES=747, PETRI_TRANSITIONS=2193} [2023-09-01 02:04:40,077 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 718 predicate places. [2023-09-01 02:04:40,077 INFO L495 AbstractCegarLoop]: Abstraction has has 747 places, 2193 transitions, 79733 flow [2023-09-01 02:04:40,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 182.8235294117647) internal successors, (3108), 17 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:04:40,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:04:40,078 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:04:40,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-09-01 02:04:40,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:04:40,281 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:04:40,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:04:40,281 INFO L85 PathProgramCache]: Analyzing trace with hash -339650093, now seen corresponding path program 64 times [2023-09-01 02:04:40,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:04:40,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985096432] [2023-09-01 02:04:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:04:40,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:04:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:04:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:04:40,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:04:40,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985096432] [2023-09-01 02:04:40,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985096432] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:04:40,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379394578] [2023-09-01 02:04:40,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:04:40,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:04:40,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:04:40,347 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:04:40,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-09-01 02:04:40,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:04:40,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:04:40,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:04:40,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:04:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:04:40,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:04:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:04:40,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379394578] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:04:40,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:04:40,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-09-01 02:04:40,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101037068] [2023-09-01 02:04:40,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:04:40,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 02:04:40,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:04:40,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 02:04:40,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-09-01 02:04:40,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:04:40,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 747 places, 2193 transitions, 79733 flow. Second operand has 14 states, 14 states have (on average 183.0) internal successors, (2562), 14 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:04:40,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:04:40,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:04:40,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:04:52,395 INFO L130 PetriNetUnfolder]: 6214/12697 cut-off events. [2023-09-01 02:04:52,395 INFO L131 PetriNetUnfolder]: For 1181455/1181455 co-relation queries the response was YES. [2023-09-01 02:04:52,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184956 conditions, 12697 events. 6214/12697 cut-off events. For 1181455/1181455 co-relation queries the response was YES. Maximal size of possible extension queue 1140. Compared 119598 event pairs, 255 based on Foata normal form. 52/12749 useless extension candidates. Maximal degree in co-relation 184712. Up to 9930 conditions per place. [2023-09-01 02:04:52,672 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 1866 selfloop transitions, 527 changer transitions 0/2393 dead transitions. [2023-09-01 02:04:52,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 2393 transitions, 90964 flow [2023-09-01 02:04:52,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:04:52,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:04:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1687 transitions. [2023-09-01 02:04:52,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42795535261288686 [2023-09-01 02:04:52,674 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1687 transitions. [2023-09-01 02:04:52,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1687 transitions. [2023-09-01 02:04:52,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:04:52,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1687 transitions. [2023-09-01 02:04:52,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 187.44444444444446) internal successors, (1687), 9 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:04:52,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:04:52,676 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:04:52,677 INFO L175 Difference]: Start difference. First operand has 747 places, 2193 transitions, 79733 flow. Second operand 9 states and 1687 transitions. [2023-09-01 02:04:52,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 2393 transitions, 90964 flow [2023-09-01 02:05:18,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 2393 transitions, 88825 flow, removed 717 selfloop flow, removed 19 redundant places. [2023-09-01 02:05:18,842 INFO L231 Difference]: Finished difference. Result has 741 places, 2289 transitions, 83256 flow [2023-09-01 02:05:18,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=77782, PETRI_DIFFERENCE_MINUEND_PLACES=728, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=429, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=83256, PETRI_PLACES=741, PETRI_TRANSITIONS=2289} [2023-09-01 02:05:18,843 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 712 predicate places. [2023-09-01 02:05:18,843 INFO L495 AbstractCegarLoop]: Abstraction has has 741 places, 2289 transitions, 83256 flow [2023-09-01 02:05:18,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 183.0) internal successors, (2562), 14 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:05:18,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:05:18,844 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:05:18,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2023-09-01 02:05:19,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:05:19,044 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:05:19,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:05:19,045 INFO L85 PathProgramCache]: Analyzing trace with hash 387994068, now seen corresponding path program 65 times [2023-09-01 02:05:19,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:05:19,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122991438] [2023-09-01 02:05:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:05:19,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:05:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:05:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:05:19,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:05:19,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122991438] [2023-09-01 02:05:19,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122991438] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:05:19,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607941876] [2023-09-01 02:05:19,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:05:19,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:05:19,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:05:19,106 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:05:19,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-09-01 02:05:19,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 02:05:19,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:05:19,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:05:19,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:05:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:05:19,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:05:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:05:19,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607941876] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:05:19,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:05:19,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2023-09-01 02:05:19,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759860016] [2023-09-01 02:05:19,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:05:19,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:05:19,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:05:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:05:19,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:05:19,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:05:19,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 741 places, 2289 transitions, 83256 flow. Second operand has 16 states, 16 states have (on average 182.9375) internal successors, (2927), 16 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:05:19,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:05:19,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:05:19,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:05:33,047 INFO L130 PetriNetUnfolder]: 6491/13290 cut-off events. [2023-09-01 02:05:33,048 INFO L131 PetriNetUnfolder]: For 1284924/1284924 co-relation queries the response was YES. [2023-09-01 02:05:33,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193984 conditions, 13290 events. 6491/13290 cut-off events. For 1284924/1284924 co-relation queries the response was YES. Maximal size of possible extension queue 1198. Compared 126569 event pairs, 2140 based on Foata normal form. 98/13388 useless extension candidates. Maximal degree in co-relation 193740. Up to 10478 conditions per place. [2023-09-01 02:05:33,507 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 2040 selfloop transitions, 436 changer transitions 0/2476 dead transitions. [2023-09-01 02:05:33,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 2476 transitions, 93941 flow [2023-09-01 02:05:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 02:05:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 02:05:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3369 transitions. [2023-09-01 02:05:33,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273211567732116 [2023-09-01 02:05:33,509 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3369 transitions. [2023-09-01 02:05:33,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3369 transitions. [2023-09-01 02:05:33,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:05:33,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3369 transitions. [2023-09-01 02:05:33,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 187.16666666666666) internal successors, (3369), 18 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:05:33,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:05:33,515 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:05:33,515 INFO L175 Difference]: Start difference. First operand has 741 places, 2289 transitions, 83256 flow. Second operand 18 states and 3369 transitions. [2023-09-01 02:05:33,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 2476 transitions, 93941 flow [2023-09-01 02:06:01,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 751 places, 2476 transitions, 93458 flow, removed 115 selfloop flow, removed 6 redundant places. [2023-09-01 02:06:01,699 INFO L231 Difference]: Finished difference. Result has 755 places, 2364 transitions, 87157 flow [2023-09-01 02:06:01,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=82289, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1857, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=87157, PETRI_PLACES=755, PETRI_TRANSITIONS=2364} [2023-09-01 02:06:01,702 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 726 predicate places. [2023-09-01 02:06:01,702 INFO L495 AbstractCegarLoop]: Abstraction has has 755 places, 2364 transitions, 87157 flow [2023-09-01 02:06:01,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 182.9375) internal successors, (2927), 16 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:06:01,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:06:01,703 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:06:01,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-09-01 02:06:01,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:06:01,910 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:06:01,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:06:01,910 INFO L85 PathProgramCache]: Analyzing trace with hash 557486074, now seen corresponding path program 66 times [2023-09-01 02:06:01,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:06:01,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009201490] [2023-09-01 02:06:01,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:06:01,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:06:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:06:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:06:01,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:06:01,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009201490] [2023-09-01 02:06:01,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009201490] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:06:01,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476741315] [2023-09-01 02:06:01,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 02:06:01,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:06:01,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:06:01,991 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:06:01,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-09-01 02:06:02,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 02:06:02,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:06:02,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:06:02,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:06:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:06:02,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:06:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:06:02,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476741315] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:06:02,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:06:02,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2023-09-01 02:06:02,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483774982] [2023-09-01 02:06:02,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:06:02,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:06:02,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:06:02,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:06:02,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:06:02,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:06:02,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 755 places, 2364 transitions, 87157 flow. Second operand has 16 states, 16 states have (on average 182.8125) internal successors, (2925), 16 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:06:02,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:06:02,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:06:02,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:06:15,719 INFO L130 PetriNetUnfolder]: 6443/13138 cut-off events. [2023-09-01 02:06:15,719 INFO L131 PetriNetUnfolder]: For 1233756/1233756 co-relation queries the response was YES. [2023-09-01 02:06:15,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193347 conditions, 13138 events. 6443/13138 cut-off events. For 1233756/1233756 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 124357 event pairs, 1086 based on Foata normal form. 42/13180 useless extension candidates. Maximal degree in co-relation 193100. Up to 4246 conditions per place. [2023-09-01 02:06:16,036 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1603 selfloop transitions, 838 changer transitions 7/2448 dead transitions. [2023-09-01 02:06:16,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 2448 transitions, 93697 flow [2023-09-01 02:06:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 02:06:16,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 02:06:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4642 transitions. [2023-09-01 02:06:16,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4239269406392694 [2023-09-01 02:06:16,039 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4642 transitions. [2023-09-01 02:06:16,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4642 transitions. [2023-09-01 02:06:16,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:06:16,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4642 transitions. [2023-09-01 02:06:16,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 185.68) internal successors, (4642), 25 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:06:16,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 438.0) internal successors, (11388), 26 states have internal predecessors, (11388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:06:16,046 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 438.0) internal successors, (11388), 26 states have internal predecessors, (11388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:06:16,047 INFO L175 Difference]: Start difference. First operand has 755 places, 2364 transitions, 87157 flow. Second operand 25 states and 4642 transitions. [2023-09-01 02:06:16,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 777 places, 2448 transitions, 93697 flow [2023-09-01 02:06:43,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 769 places, 2448 transitions, 93259 flow, removed 176 selfloop flow, removed 8 redundant places. [2023-09-01 02:06:43,266 INFO L231 Difference]: Finished difference. Result has 771 places, 2355 transitions, 88402 flow [2023-09-01 02:06:43,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=85441, PETRI_DIFFERENCE_MINUEND_PLACES=745, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=816, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=88402, PETRI_PLACES=771, PETRI_TRANSITIONS=2355} [2023-09-01 02:06:43,268 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 742 predicate places. [2023-09-01 02:06:43,268 INFO L495 AbstractCegarLoop]: Abstraction has has 771 places, 2355 transitions, 88402 flow [2023-09-01 02:06:43,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 182.8125) internal successors, (2925), 16 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:06:43,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:06:43,269 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:06:43,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-09-01 02:06:43,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2023-09-01 02:06:43,470 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:06:43,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:06:43,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1660162226, now seen corresponding path program 67 times [2023-09-01 02:06:43,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:06:43,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688469071] [2023-09-01 02:06:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:06:43,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:06:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:06:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:06:43,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:06:43,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688469071] [2023-09-01 02:06:43,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688469071] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:06:43,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262914838] [2023-09-01 02:06:43,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 02:06:43,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:06:43,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:06:43,537 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:06:43,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-09-01 02:06:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:06:43,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:06:43,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:06:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:06:43,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:06:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:06:43,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262914838] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:06:43,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:06:43,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-09-01 02:06:43,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029536752] [2023-09-01 02:06:43,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:06:43,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 02:06:43,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:06:43,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 02:06:43,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-09-01 02:06:43,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:06:43,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 2355 transitions, 88402 flow. Second operand has 18 states, 18 states have (on average 182.66666666666666) internal successors, (3288), 18 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:06:43,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:06:43,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:06:43,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:07:01,096 INFO L130 PetriNetUnfolder]: 6789/13906 cut-off events. [2023-09-01 02:07:01,096 INFO L131 PetriNetUnfolder]: For 1393570/1393570 co-relation queries the response was YES. [2023-09-01 02:07:01,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209608 conditions, 13906 events. 6789/13906 cut-off events. For 1393570/1393570 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 133434 event pairs, 1049 based on Foata normal form. 22/13928 useless extension candidates. Maximal degree in co-relation 209358. Up to 4151 conditions per place. [2023-09-01 02:07:01,545 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1605 selfloop transitions, 1010 changer transitions 6/2621 dead transitions. [2023-09-01 02:07:01,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 798 places, 2621 transitions, 102345 flow [2023-09-01 02:07:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 02:07:01,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 02:07:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5944 transitions. [2023-09-01 02:07:01,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4240867579908676 [2023-09-01 02:07:01,642 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5944 transitions. [2023-09-01 02:07:01,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5944 transitions. [2023-09-01 02:07:01,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:07:01,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5944 transitions. [2023-09-01 02:07:01,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 185.75) internal successors, (5944), 32 states have internal predecessors, (5944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:07:01,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 438.0) internal successors, (14454), 33 states have internal predecessors, (14454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:07:01,655 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 438.0) internal successors, (14454), 33 states have internal predecessors, (14454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:07:01,655 INFO L175 Difference]: Start difference. First operand has 771 places, 2355 transitions, 88402 flow. Second operand 32 states and 5944 transitions. [2023-09-01 02:07:01,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 798 places, 2621 transitions, 102345 flow [2023-09-01 02:07:32,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 2621 transitions, 101358 flow, removed 340 selfloop flow, removed 13 redundant places. [2023-09-01 02:07:32,622 INFO L231 Difference]: Finished difference. Result has 796 places, 2502 transitions, 97699 flow [2023-09-01 02:07:32,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=87394, PETRI_DIFFERENCE_MINUEND_PLACES=754, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=865, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=97699, PETRI_PLACES=796, PETRI_TRANSITIONS=2502} [2023-09-01 02:07:32,625 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 767 predicate places. [2023-09-01 02:07:32,625 INFO L495 AbstractCegarLoop]: Abstraction has has 796 places, 2502 transitions, 97699 flow [2023-09-01 02:07:32,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 182.66666666666666) internal successors, (3288), 18 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:07:32,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:07:32,626 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:07:32,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-09-01 02:07:32,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:07:32,833 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:07:32,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:07:32,833 INFO L85 PathProgramCache]: Analyzing trace with hash 137144454, now seen corresponding path program 68 times [2023-09-01 02:07:32,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:07:32,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385295327] [2023-09-01 02:07:32,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:07:32,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:07:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:07:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:07:32,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:07:32,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385295327] [2023-09-01 02:07:32,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385295327] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:07:32,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279871865] [2023-09-01 02:07:32,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:07:32,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:07:32,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:07:32,912 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:07:32,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-09-01 02:07:33,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:07:33,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:07:33,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:07:33,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:07:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:07:33,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:07:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:07:33,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279871865] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:07:33,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:07:33,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-09-01 02:07:33,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708499695] [2023-09-01 02:07:33,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:07:33,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 02:07:33,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:07:33,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 02:07:33,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-09-01 02:07:33,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:07:33,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 2502 transitions, 97699 flow. Second operand has 14 states, 14 states have (on average 182.85714285714286) internal successors, (2560), 14 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:07:33,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:07:33,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:07:33,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:07:49,995 INFO L130 PetriNetUnfolder]: 6785/13898 cut-off events. [2023-09-01 02:07:49,995 INFO L131 PetriNetUnfolder]: For 1488673/1488673 co-relation queries the response was YES. [2023-09-01 02:07:50,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214357 conditions, 13898 events. 6785/13898 cut-off events. For 1488673/1488673 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 133259 event pairs, 1385 based on Foata normal form. 2/13900 useless extension candidates. Maximal degree in co-relation 214097. Up to 7142 conditions per place. [2023-09-01 02:07:50,322 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1835 selfloop transitions, 715 changer transitions 7/2557 dead transitions. [2023-09-01 02:07:50,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 808 places, 2557 transitions, 104220 flow [2023-09-01 02:07:50,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 02:07:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 02:07:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2599 transitions. [2023-09-01 02:07:50,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42384213959556427 [2023-09-01 02:07:50,324 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2599 transitions. [2023-09-01 02:07:50,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2599 transitions. [2023-09-01 02:07:50,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:07:50,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2599 transitions. [2023-09-01 02:07:50,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 185.64285714285714) internal successors, (2599), 14 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:07:50,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:07:50,328 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:07:50,328 INFO L175 Difference]: Start difference. First operand has 796 places, 2502 transitions, 97699 flow. Second operand 14 states and 2599 transitions. [2023-09-01 02:07:50,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 808 places, 2557 transitions, 104220 flow [2023-09-01 02:08:26,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 2557 transitions, 101888 flow, removed 907 selfloop flow, removed 13 redundant places. [2023-09-01 02:08:26,193 INFO L231 Difference]: Finished difference. Result has 800 places, 2505 transitions, 97649 flow [2023-09-01 02:08:26,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=95370, PETRI_DIFFERENCE_MINUEND_PLACES=782, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=710, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=97649, PETRI_PLACES=800, PETRI_TRANSITIONS=2505} [2023-09-01 02:08:26,196 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 771 predicate places. [2023-09-01 02:08:26,196 INFO L495 AbstractCegarLoop]: Abstraction has has 800 places, 2505 transitions, 97649 flow [2023-09-01 02:08:26,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 182.85714285714286) internal successors, (2560), 14 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:08:26,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:08:26,197 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:08:26,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-09-01 02:08:26,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:08:26,402 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:08:26,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:08:26,403 INFO L85 PathProgramCache]: Analyzing trace with hash 394764947, now seen corresponding path program 69 times [2023-09-01 02:08:26,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:08:26,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248540051] [2023-09-01 02:08:26,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:08:26,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:08:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:08:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:08:26,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:08:26,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248540051] [2023-09-01 02:08:26,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248540051] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:08:26,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603421997] [2023-09-01 02:08:26,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:08:26,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:08:26,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:08:26,494 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:08:26,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-09-01 02:08:26,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 02:08:26,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:08:26,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:08:26,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:08:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:08:26,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:08:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:08:26,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603421997] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:08:26,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:08:26,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-09-01 02:08:26,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325747511] [2023-09-01 02:08:26,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:08:26,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 02:08:26,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:08:26,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 02:08:26,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-09-01 02:08:26,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:08:26,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 2505 transitions, 97649 flow. Second operand has 18 states, 18 states have (on average 182.77777777777777) internal successors, (3290), 18 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:08:26,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:08:26,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:08:26,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:08:43,130 INFO L130 PetriNetUnfolder]: 6941/14126 cut-off events. [2023-09-01 02:08:43,130 INFO L131 PetriNetUnfolder]: For 1480329/1480329 co-relation queries the response was YES. [2023-09-01 02:08:43,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218948 conditions, 14126 events. 6941/14126 cut-off events. For 1480329/1480329 co-relation queries the response was YES. Maximal size of possible extension queue 1281. Compared 134842 event pairs, 669 based on Foata normal form. 66/14192 useless extension candidates. Maximal degree in co-relation 218683. Up to 13212 conditions per place. [2023-09-01 02:08:43,466 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 2381 selfloop transitions, 261 changer transitions 0/2642 dead transitions. [2023-09-01 02:08:43,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 2642 transitions, 107087 flow [2023-09-01 02:08:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 02:08:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 02:08:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3718 transitions. [2023-09-01 02:08:43,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42442922374429226 [2023-09-01 02:08:43,469 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3718 transitions. [2023-09-01 02:08:43,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3718 transitions. [2023-09-01 02:08:43,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:08:43,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3718 transitions. [2023-09-01 02:08:43,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 185.9) internal successors, (3718), 20 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:08:43,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:08:43,475 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:08:43,475 INFO L175 Difference]: Start difference. First operand has 800 places, 2505 transitions, 97649 flow. Second operand 20 states and 3718 transitions. [2023-09-01 02:08:43,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 816 places, 2642 transitions, 107087 flow [2023-09-01 02:09:19,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 807 places, 2642 transitions, 106360 flow, removed 56 selfloop flow, removed 9 redundant places. [2023-09-01 02:09:19,101 INFO L231 Difference]: Finished difference. Result has 815 places, 2588 transitions, 100949 flow [2023-09-01 02:09:19,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=96659, PETRI_DIFFERENCE_MINUEND_PLACES=788, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=100949, PETRI_PLACES=815, PETRI_TRANSITIONS=2588} [2023-09-01 02:09:19,103 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 786 predicate places. [2023-09-01 02:09:19,104 INFO L495 AbstractCegarLoop]: Abstraction has has 815 places, 2588 transitions, 100949 flow [2023-09-01 02:09:19,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 182.77777777777777) internal successors, (3290), 18 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:09:19,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:09:19,104 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:09:19,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2023-09-01 02:09:19,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2023-09-01 02:09:19,305 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:09:19,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:09:19,306 INFO L85 PathProgramCache]: Analyzing trace with hash -987788263, now seen corresponding path program 70 times [2023-09-01 02:09:19,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:09:19,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127956146] [2023-09-01 02:09:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:09:19,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:09:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:09:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:09:19,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:09:19,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127956146] [2023-09-01 02:09:19,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127956146] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:09:19,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55721459] [2023-09-01 02:09:19,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:09:19,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:09:19,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:09:19,373 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:09:19,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-09-01 02:09:19,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:09:19,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:09:19,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:09:19,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:09:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:09:19,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:09:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:09:19,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55721459] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:09:19,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:09:19,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 02:09:19,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527964369] [2023-09-01 02:09:19,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:09:19,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:09:19,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:09:19,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:09:19,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:09:19,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:09:19,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 815 places, 2588 transitions, 100949 flow. Second operand has 16 states, 16 states have (on average 182.875) internal successors, (2926), 16 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:09:19,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:09:19,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:09:19,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:09:36,348 INFO L130 PetriNetUnfolder]: 7065/14326 cut-off events. [2023-09-01 02:09:36,348 INFO L131 PetriNetUnfolder]: For 1449117/1449117 co-relation queries the response was YES. [2023-09-01 02:09:36,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223262 conditions, 14326 events. 7065/14326 cut-off events. For 1449117/1449117 co-relation queries the response was YES. Maximal size of possible extension queue 1302. Compared 136518 event pairs, 555 based on Foata normal form. 12/14338 useless extension candidates. Maximal degree in co-relation 222991. Up to 13110 conditions per place. [2023-09-01 02:09:36,714 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 2392 selfloop transitions, 313 changer transitions 0/2705 dead transitions. [2023-09-01 02:09:36,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 2705 transitions, 109998 flow [2023-09-01 02:09:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 02:09:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 02:09:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2604 transitions. [2023-09-01 02:09:36,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246575342465753 [2023-09-01 02:09:36,717 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2604 transitions. [2023-09-01 02:09:36,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2604 transitions. [2023-09-01 02:09:36,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:09:36,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2604 transitions. [2023-09-01 02:09:36,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.0) internal successors, (2604), 14 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:09:36,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:09:36,722 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:09:36,722 INFO L175 Difference]: Start difference. First operand has 815 places, 2588 transitions, 100949 flow. Second operand 14 states and 2604 transitions. [2023-09-01 02:09:36,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 2705 transitions, 109998 flow [2023-09-01 02:10:13,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 819 places, 2705 transitions, 108770 flow, removed 524 selfloop flow, removed 6 redundant places. [2023-09-01 02:10:13,993 INFO L231 Difference]: Finished difference. Result has 825 places, 2643 transitions, 102908 flow [2023-09-01 02:10:13,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=99819, PETRI_DIFFERENCE_MINUEND_PLACES=806, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=102908, PETRI_PLACES=825, PETRI_TRANSITIONS=2643} [2023-09-01 02:10:13,995 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 796 predicate places. [2023-09-01 02:10:13,995 INFO L495 AbstractCegarLoop]: Abstraction has has 825 places, 2643 transitions, 102908 flow [2023-09-01 02:10:13,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 182.875) internal successors, (2926), 16 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:10:13,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:10:13,996 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:10:14,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-09-01 02:10:14,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:10:14,202 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:10:14,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:10:14,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2053066874, now seen corresponding path program 71 times [2023-09-01 02:10:14,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:10:14,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909725494] [2023-09-01 02:10:14,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:10:14,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:10:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:10:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:10:14,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:10:14,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909725494] [2023-09-01 02:10:14,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909725494] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:10:14,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920705206] [2023-09-01 02:10:14,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:10:14,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:10:14,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:10:14,270 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:10:14,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-09-01 02:10:14,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 02:10:14,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:10:14,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:10:14,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:10:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:10:14,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:10:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:10:14,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920705206] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:10:14,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:10:14,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 02:10:14,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949628606] [2023-09-01 02:10:14,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:10:14,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:10:14,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:10:14,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:10:14,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:10:14,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:10:14,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 825 places, 2643 transitions, 102908 flow. Second operand has 16 states, 16 states have (on average 182.75) internal successors, (2924), 16 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:10:14,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:10:14,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:10:14,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:10:31,728 INFO L130 PetriNetUnfolder]: 7063/14332 cut-off events. [2023-09-01 02:10:31,728 INFO L131 PetriNetUnfolder]: For 1440970/1440970 co-relation queries the response was YES. [2023-09-01 02:10:32,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223206 conditions, 14332 events. 7063/14332 cut-off events. For 1440970/1440970 co-relation queries the response was YES. Maximal size of possible extension queue 1303. Compared 137065 event pairs, 1233 based on Foata normal form. 4/14336 useless extension candidates. Maximal degree in co-relation 222929. Up to 5055 conditions per place. [2023-09-01 02:10:32,184 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1786 selfloop transitions, 936 changer transitions 4/2726 dead transitions. [2023-09-01 02:10:32,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 2726 transitions, 109568 flow [2023-09-01 02:10:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 02:10:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 02:10:32,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4826 transitions. [2023-09-01 02:10:32,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377941693010185 [2023-09-01 02:10:32,187 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4826 transitions. [2023-09-01 02:10:32,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4826 transitions. [2023-09-01 02:10:32,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:10:32,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4826 transitions. [2023-09-01 02:10:32,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 185.6153846153846) internal successors, (4826), 26 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:10:32,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 438.0) internal successors, (11826), 27 states have internal predecessors, (11826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:10:32,195 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 438.0) internal successors, (11826), 27 states have internal predecessors, (11826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:10:32,195 INFO L175 Difference]: Start difference. First operand has 825 places, 2643 transitions, 102908 flow. Second operand 26 states and 4826 transitions. [2023-09-01 02:10:32,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 850 places, 2726 transitions, 109568 flow [2023-09-01 02:11:08,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 846 places, 2726 transitions, 109316 flow, removed 29 selfloop flow, removed 4 redundant places. [2023-09-01 02:11:08,652 INFO L231 Difference]: Finished difference. Result has 849 places, 2643 transitions, 104715 flow [2023-09-01 02:11:08,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=102636, PETRI_DIFFERENCE_MINUEND_PLACES=821, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=933, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=104715, PETRI_PLACES=849, PETRI_TRANSITIONS=2643} [2023-09-01 02:11:08,654 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 820 predicate places. [2023-09-01 02:11:08,655 INFO L495 AbstractCegarLoop]: Abstraction has has 849 places, 2643 transitions, 104715 flow [2023-09-01 02:11:08,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 182.75) internal successors, (2924), 16 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:11:08,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:11:08,655 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:11:08,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-09-01 02:11:08,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:11:08,856 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:11:08,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:11:08,856 INFO L85 PathProgramCache]: Analyzing trace with hash 307762137, now seen corresponding path program 72 times [2023-09-01 02:11:08,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:11:08,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630103161] [2023-09-01 02:11:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:11:08,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:11:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:11:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:11:08,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:11:08,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630103161] [2023-09-01 02:11:08,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630103161] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:11:08,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325307105] [2023-09-01 02:11:08,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 02:11:08,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:11:08,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:11:08,926 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:11:08,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-09-01 02:11:09,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 02:11:09,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:11:09,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:11:09,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:11:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:11:09,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:11:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:11:09,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325307105] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:11:09,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:11:09,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 02:11:09,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537389613] [2023-09-01 02:11:09,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:11:09,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 02:11:09,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:11:09,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 02:11:09,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-09-01 02:11:09,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:11:09,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 849 places, 2643 transitions, 104715 flow. Second operand has 15 states, 15 states have (on average 182.86666666666667) internal successors, (2743), 15 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:11:09,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:11:09,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:11:09,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:11:27,584 INFO L130 PetriNetUnfolder]: 7206/14623 cut-off events. [2023-09-01 02:11:27,584 INFO L131 PetriNetUnfolder]: For 1575523/1575523 co-relation queries the response was YES. [2023-09-01 02:11:27,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232343 conditions, 14623 events. 7206/14623 cut-off events. For 1575523/1575523 co-relation queries the response was YES. Maximal size of possible extension queue 1343. Compared 139923 event pairs, 511 based on Foata normal form. 92/14715 useless extension candidates. Maximal degree in co-relation 232063. Up to 10846 conditions per place. [2023-09-01 02:11:27,979 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 2058 selfloop transitions, 779 changer transitions 0/2837 dead transitions. [2023-09-01 02:11:27,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 868 places, 2837 transitions, 116256 flow [2023-09-01 02:11:27,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 02:11:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 02:11:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4114 transitions. [2023-09-01 02:11:27,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269406392694064 [2023-09-01 02:11:27,982 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4114 transitions. [2023-09-01 02:11:27,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4114 transitions. [2023-09-01 02:11:27,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:11:27,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4114 transitions. [2023-09-01 02:11:27,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 187.0) internal successors, (4114), 22 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:11:27,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 438.0) internal successors, (10074), 23 states have internal predecessors, (10074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:11:27,989 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 438.0) internal successors, (10074), 23 states have internal predecessors, (10074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:11:27,989 INFO L175 Difference]: Start difference. First operand has 849 places, 2643 transitions, 104715 flow. Second operand 22 states and 4114 transitions. [2023-09-01 02:11:27,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 868 places, 2837 transitions, 116256 flow [2023-09-01 02:12:05,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 852 places, 2837 transitions, 114223 flow, removed 132 selfloop flow, removed 16 redundant places. [2023-09-01 02:12:05,856 INFO L231 Difference]: Finished difference. Result has 859 places, 2708 transitions, 107910 flow [2023-09-01 02:12:05,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=102131, PETRI_DIFFERENCE_MINUEND_PLACES=831, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1877, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=107910, PETRI_PLACES=859, PETRI_TRANSITIONS=2708} [2023-09-01 02:12:05,859 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 830 predicate places. [2023-09-01 02:12:05,859 INFO L495 AbstractCegarLoop]: Abstraction has has 859 places, 2708 transitions, 107910 flow [2023-09-01 02:12:05,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.86666666666667) internal successors, (2743), 15 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:12:05,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:12:05,860 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:12:05,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2023-09-01 02:12:06,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:12:06,065 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:12:06,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:12:06,066 INFO L85 PathProgramCache]: Analyzing trace with hash -651354091, now seen corresponding path program 73 times [2023-09-01 02:12:06,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:12:06,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077167460] [2023-09-01 02:12:06,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:12:06,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:12:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:12:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:12:06,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:12:06,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077167460] [2023-09-01 02:12:06,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077167460] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:12:06,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184606987] [2023-09-01 02:12:06,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 02:12:06,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:12:06,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:12:06,157 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:12:06,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-09-01 02:12:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:12:06,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:12:06,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:12:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:12:06,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:12:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:12:06,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184606987] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:12:06,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:12:06,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2023-09-01 02:12:06,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888595455] [2023-09-01 02:12:06,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:12:06,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:12:06,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:12:06,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:12:06,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:12:06,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-09-01 02:12:06,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 859 places, 2708 transitions, 107910 flow. Second operand has 16 states, 16 states have (on average 182.9375) internal successors, (2927), 16 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:12:06,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:12:06,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-09-01 02:12:06,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15