./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1.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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:05:16,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:05:16,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:05:17,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:05:17,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:05:17,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:05:17,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:05:17,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:05:17,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:05:17,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:05:17,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:05:17,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:05:17,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:05:17,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:05:17,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:05:17,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:05:17,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:05:17,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:05:17,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:05:17,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:05:17,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:05:17,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:05:17,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:05:17,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:05:17,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:05:17,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:05:17,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:05:17,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:05:17,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:05:17,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:05:17,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:05:17,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:05:17,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:05:17,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:05:17,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:05:17,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:05:17,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:05:17,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:05:17,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:05:17,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:05:17,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:05:17,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:05:17,126 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:05:17,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:05:17,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:05:17,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:05:17,129 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:05:17,129 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:05:17,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:05:17,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:05:17,130 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:05:17,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:05:17,131 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:05:17,131 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:05:17,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:05:17,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:05:17,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:05:17,132 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:05:17,132 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:05:17,133 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:05:17,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:05:17,133 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:05:17,133 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:05:17,133 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:05:17,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:05:17,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:05:17,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:05:17,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:05:17,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:05:17,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:05:17,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:05:17,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:05:17,135 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:05:17,135 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:05:17,136 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:05:17,136 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:05:17,136 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:05:17,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:05:17,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:05:17,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:05:17,466 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:05:17,466 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:05:17,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-08-30 00:05:18,557 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:05:18,739 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:05:18,739 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-08-30 00:05:18,746 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/420ad2d25/343a8889ea2a45c087256d69df094c49/FLAGde6179c35 [2023-08-30 00:05:18,784 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/420ad2d25/343a8889ea2a45c087256d69df094c49 [2023-08-30 00:05:18,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:05:18,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:05:18,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:05:18,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:05:18,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:05:18,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:05:18" (1/1) ... [2023-08-30 00:05:18,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67040b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:18, skipping insertion in model container [2023-08-30 00:05:18,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:05:18" (1/1) ... [2023-08-30 00:05:18,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:05:18,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:05:18,963 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c[1991,2004] [2023-08-30 00:05:18,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:05:18,976 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:05:18,993 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c[1991,2004] [2023-08-30 00:05:18,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:05:19,001 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:05:19,001 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:05:19,007 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:05:19,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:19 WrapperNode [2023-08-30 00:05:19,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:05:19,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:05:19,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:05:19,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:05:19,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:19" (1/1) ... [2023-08-30 00:05:19,022 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:19" (1/1) ... [2023-08-30 00:05:19,044 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2023-08-30 00:05:19,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:05:19,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:05:19,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:05:19,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:05:19,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:19" (1/1) ... [2023-08-30 00:05:19,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:19" (1/1) ... [2023-08-30 00:05:19,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:19" (1/1) ... [2023-08-30 00:05:19,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:19" (1/1) ... [2023-08-30 00:05:19,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:19" (1/1) ... [2023-08-30 00:05:19,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:19" (1/1) ... [2023-08-30 00:05:19,077 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:19" (1/1) ... [2023-08-30 00:05:19,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:19" (1/1) ... [2023-08-30 00:05:19,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:05:19,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:05:19,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:05:19,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:05:19,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:19" (1/1) ... [2023-08-30 00:05:19,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:05:19,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:19,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:05:19,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:05:19,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:05:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:05:19,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:05:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:05:19,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:05:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 00:05:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:05:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 00:05:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:05:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:05:19,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:05:19,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:05:19,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 00:05:19,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:05:19,153 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:05:19,232 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:05:19,234 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:05:19,546 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:05:19,597 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:05:19,597 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 00:05:19,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:05:19 BoogieIcfgContainer [2023-08-30 00:05:19,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:05:19,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:05:19,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:05:19,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:05:19,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:05:18" (1/3) ... [2023-08-30 00:05:19,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5617ca4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:05:19, skipping insertion in model container [2023-08-30 00:05:19,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:05:19" (2/3) ... [2023-08-30 00:05:19,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5617ca4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:05:19, skipping insertion in model container [2023-08-30 00:05:19,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:05:19" (3/3) ... [2023-08-30 00:05:19,607 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-08-30 00:05:19,624 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:05:19,624 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 00:05:19,624 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:05:19,720 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 00:05:19,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 85 transitions, 186 flow [2023-08-30 00:05:19,827 INFO L130 PetriNetUnfolder]: 5/83 cut-off events. [2023-08-30 00:05:19,827 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:05:19,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 83 events. 5/83 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-08-30 00:05:19,835 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 85 transitions, 186 flow [2023-08-30 00:05:19,839 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 79 transitions, 170 flow [2023-08-30 00:05:19,843 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:05:19,856 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 79 transitions, 170 flow [2023-08-30 00:05:19,863 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 79 transitions, 170 flow [2023-08-30 00:05:19,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 79 transitions, 170 flow [2023-08-30 00:05:19,897 INFO L130 PetriNetUnfolder]: 5/79 cut-off events. [2023-08-30 00:05:19,901 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:05:19,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 5/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-08-30 00:05:19,905 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2023-08-30 00:05:22,092 INFO L134 LiptonReduction]: Checked pairs total: 698 [2023-08-30 00:05:22,092 INFO L136 LiptonReduction]: Total number of compositions: 75 [2023-08-30 00:05:22,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:05:22,112 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;@d3afa0b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:05:22,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 00:05:22,113 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 00:05:22,114 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:05:22,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:22,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 00:05:22,115 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)] === [2023-08-30 00:05:22,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:22,119 INFO L85 PathProgramCache]: Analyzing trace with hash 341, now seen corresponding path program 1 times [2023-08-30 00:05:22,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:22,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112398218] [2023-08-30 00:05:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:22,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:22,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:22,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112398218] [2023-08-30 00:05:22,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112398218] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:22,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:22,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 00:05:22,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840940352] [2023-08-30 00:05:22,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:22,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 00:05:22,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:22,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 00:05:22,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 00:05:22,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 160 [2023-08-30 00:05:22,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:22,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:22,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 160 [2023-08-30 00:05:22,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:22,319 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2023-08-30 00:05:22,319 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 00:05:22,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 504 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-08-30 00:05:22,322 INFO L137 encePairwiseOnDemand]: 157/160 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-30 00:05:22,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-30 00:05:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 00:05:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 00:05:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 172 transitions. [2023-08-30 00:05:22,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2023-08-30 00:05:22,353 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 172 transitions. [2023-08-30 00:05:22,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 172 transitions. [2023-08-30 00:05:22,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:22,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 172 transitions. [2023-08-30 00:05:22,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 86.0) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:22,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:22,385 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:22,387 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 172 transitions. [2023-08-30 00:05:22,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-30 00:05:22,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 00:05:22,392 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-30 00:05:22,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-30 00:05:22,398 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 00:05:22,398 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-30 00:05:22,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:22,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:22,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:05:22,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 00:05:22,400 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:22,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:22,411 INFO L85 PathProgramCache]: Analyzing trace with hash 336308, now seen corresponding path program 1 times [2023-08-30 00:05:22,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:22,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751647272] [2023-08-30 00:05:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:22,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:22,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:22,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751647272] [2023-08-30 00:05:22,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751647272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:22,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:22,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:05:22,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982583779] [2023-08-30 00:05:22,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:22,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:05:22,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:22,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:05:22,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:05:22,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 160 [2023-08-30 00:05:22,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:22,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:22,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 160 [2023-08-30 00:05:22,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:22,681 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2023-08-30 00:05:22,682 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:05:22,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 450 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-08-30 00:05:22,684 INFO L137 encePairwiseOnDemand]: 157/160 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-30 00:05:22,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-30 00:05:22,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:05:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:05:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2023-08-30 00:05:22,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47708333333333336 [2023-08-30 00:05:22,690 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2023-08-30 00:05:22,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2023-08-30 00:05:22,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:22,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2023-08-30 00:05:22,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:22,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:22,696 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:22,696 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 229 transitions. [2023-08-30 00:05:22,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-30 00:05:22,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 00:05:22,697 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-30 00:05:22,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-30 00:05:22,698 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 00:05:22,698 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-30 00:05:22,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:22,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:22,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:05:22,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 00:05:22,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:22,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:22,702 INFO L85 PathProgramCache]: Analyzing trace with hash 336307, now seen corresponding path program 1 times [2023-08-30 00:05:22,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:22,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575662078] [2023-08-30 00:05:22,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:22,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:22,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:22,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575662078] [2023-08-30 00:05:22,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575662078] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:22,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:22,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:05:22,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338585009] [2023-08-30 00:05:22,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:22,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:05:22,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:22,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:05:22,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:05:22,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 160 [2023-08-30 00:05:22,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:22,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:22,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 160 [2023-08-30 00:05:22,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:22,875 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2023-08-30 00:05:22,876 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:05:22,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 397 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-08-30 00:05:22,877 INFO L137 encePairwiseOnDemand]: 157/160 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-30 00:05:22,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-30 00:05:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:05:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:05:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2023-08-30 00:05:22,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2023-08-30 00:05:22,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2023-08-30 00:05:22,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2023-08-30 00:05:22,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:22,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2023-08-30 00:05:22,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:22,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:22,884 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:22,884 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 215 transitions. [2023-08-30 00:05:22,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-30 00:05:22,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:05:22,885 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-30 00:05:22,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-30 00:05:22,886 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 00:05:22,889 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-30 00:05:22,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:22,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:22,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:05:22,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 00:05:22,891 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)] === [2023-08-30 00:05:22,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:22,892 INFO L85 PathProgramCache]: Analyzing trace with hash 323200522, now seen corresponding path program 1 times [2023-08-30 00:05:22,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:22,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317784992] [2023-08-30 00:05:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:22,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:23,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:23,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317784992] [2023-08-30 00:05:23,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317784992] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:23,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:23,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:05:23,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211466212] [2023-08-30 00:05:23,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:23,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:05:23,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:23,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:05:23,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:05:23,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 160 [2023-08-30 00:05:23,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:23,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 160 [2023-08-30 00:05:23,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:23,099 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2023-08-30 00:05:23,100 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:05:23,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 283 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-08-30 00:05:23,101 INFO L137 encePairwiseOnDemand]: 158/160 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-30 00:05:23,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-30 00:05:23,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:05:23,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:05:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-30 00:05:23,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2023-08-30 00:05:23,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-30 00:05:23,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-30 00:05:23,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:23,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-30 00:05:23,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,105 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 225 transitions. [2023-08-30 00:05:23,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-30 00:05:23,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:05:23,107 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-30 00:05:23,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-30 00:05:23,107 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 00:05:23,108 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-30 00:05:23,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:23,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:05:23,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 00:05:23,109 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)] === [2023-08-30 00:05:23,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:23,109 INFO L85 PathProgramCache]: Analyzing trace with hash 323200521, now seen corresponding path program 1 times [2023-08-30 00:05:23,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:23,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358593636] [2023-08-30 00:05:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:23,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:23,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:23,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358593636] [2023-08-30 00:05:23,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358593636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:23,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:23,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:05:23,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147197443] [2023-08-30 00:05:23,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:23,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:05:23,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:23,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:05:23,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:05:23,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 160 [2023-08-30 00:05:23,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:23,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 160 [2023-08-30 00:05:23,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:23,236 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2023-08-30 00:05:23,236 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:05:23,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 168 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-08-30 00:05:23,237 INFO L137 encePairwiseOnDemand]: 158/160 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-30 00:05:23,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-30 00:05:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:05:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:05:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2023-08-30 00:05:23,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-30 00:05:23,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2023-08-30 00:05:23,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2023-08-30 00:05:23,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:23,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2023-08-30 00:05:23,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,242 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,242 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 200 transitions. [2023-08-30 00:05:23,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-30 00:05:23,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:05:23,243 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-30 00:05:23,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-30 00:05:23,244 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 00:05:23,244 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-30 00:05:23,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:23,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:23,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 00:05:23,245 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:23,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:23,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1301264347, now seen corresponding path program 1 times [2023-08-30 00:05:23,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:23,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248802924] [2023-08-30 00:05:23,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:23,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:23,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:23,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248802924] [2023-08-30 00:05:23,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248802924] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:23,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:23,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:05:23,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454714698] [2023-08-30 00:05:23,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:23,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:05:23,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:23,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:05:23,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:05:23,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 160 [2023-08-30 00:05:23,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:23,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 160 [2023-08-30 00:05:23,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:23,346 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2023-08-30 00:05:23,346 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:05:23,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 94 events. 49/94 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 273 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 194. Up to 65 conditions per place. [2023-08-30 00:05:23,347 INFO L137 encePairwiseOnDemand]: 156/160 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-08-30 00:05:23,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 104 flow [2023-08-30 00:05:23,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:05:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:05:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2023-08-30 00:05:23,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2023-08-30 00:05:23,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 246 transitions. [2023-08-30 00:05:23,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 246 transitions. [2023-08-30 00:05:23,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:23,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 246 transitions. [2023-08-30 00:05:23,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,351 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,351 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 246 transitions. [2023-08-30 00:05:23,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 104 flow [2023-08-30 00:05:23,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:05:23,353 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 52 flow [2023-08-30 00:05:23,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2023-08-30 00:05:23,353 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-08-30 00:05:23,354 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 52 flow [2023-08-30 00:05:23,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:23,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:23,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 00:05:23,355 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:23,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:23,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1071037245, now seen corresponding path program 1 times [2023-08-30 00:05:23,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:23,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352802002] [2023-08-30 00:05:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:23,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:23,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:23,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352802002] [2023-08-30 00:05:23,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352802002] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:23,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:23,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:05:23,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11888676] [2023-08-30 00:05:23,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:23,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:05:23,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:23,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:05:23,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:05:23,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 160 [2023-08-30 00:05:23,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:23,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 160 [2023-08-30 00:05:23,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:23,521 INFO L130 PetriNetUnfolder]: 68/137 cut-off events. [2023-08-30 00:05:23,522 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 00:05:23,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 137 events. 68/137 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 423 event pairs, 24 based on Foata normal form. 2/139 useless extension candidates. Maximal degree in co-relation 320. Up to 74 conditions per place. [2023-08-30 00:05:23,523 INFO L137 encePairwiseOnDemand]: 155/160 looper letters, 19 selfloop transitions, 4 changer transitions 17/40 dead transitions. [2023-08-30 00:05:23,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 40 transitions, 189 flow [2023-08-30 00:05:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:05:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:05:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 437 transitions. [2023-08-30 00:05:23,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4552083333333333 [2023-08-30 00:05:23,525 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 437 transitions. [2023-08-30 00:05:23,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 437 transitions. [2023-08-30 00:05:23,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:23,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 437 transitions. [2023-08-30 00:05:23,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,528 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,528 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 52 flow. Second operand 6 states and 437 transitions. [2023-08-30 00:05:23,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 40 transitions, 189 flow [2023-08-30 00:05:23,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 40 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:05:23,530 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 79 flow [2023-08-30 00:05:23,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=79, PETRI_PLACES=31, PETRI_TRANSITIONS=18} [2023-08-30 00:05:23,531 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-30 00:05:23,531 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 79 flow [2023-08-30 00:05:23,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:23,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:23,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 00:05:23,532 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:23,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:23,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1300562103, now seen corresponding path program 2 times [2023-08-30 00:05:23,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:23,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927606172] [2023-08-30 00:05:23,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:23,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:23,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:23,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927606172] [2023-08-30 00:05:23,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927606172] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:23,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450644431] [2023-08-30 00:05:23,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:05:23,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:23,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:23,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:23,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 00:05:23,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:05:23,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:23,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:05:23,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:23,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:23,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450644431] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:23,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:23,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 00:05:23,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919954857] [2023-08-30 00:05:23,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:23,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:05:23,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:23,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:05:23,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:05:23,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:23,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 18 transitions, 79 flow. Second operand has 8 states, 8 states have (on average 67.75) internal successors, (542), 8 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:23,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:23,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:23,964 INFO L130 PetriNetUnfolder]: 56/105 cut-off events. [2023-08-30 00:05:23,964 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-30 00:05:23,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 105 events. 56/105 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 276 event pairs, 2 based on Foata normal form. 6/111 useless extension candidates. Maximal degree in co-relation 331. Up to 62 conditions per place. [2023-08-30 00:05:23,966 INFO L137 encePairwiseOnDemand]: 155/160 looper letters, 28 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2023-08-30 00:05:23,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 194 flow [2023-08-30 00:05:23,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:05:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:05:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 358 transitions. [2023-08-30 00:05:23,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475 [2023-08-30 00:05:23,968 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 358 transitions. [2023-08-30 00:05:23,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 358 transitions. [2023-08-30 00:05:23,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:23,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 358 transitions. [2023-08-30 00:05:23,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.6) internal successors, (358), 5 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,970 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,971 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 79 flow. Second operand 5 states and 358 transitions. [2023-08-30 00:05:23,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 194 flow [2023-08-30 00:05:23,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 178 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 00:05:23,973 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 95 flow [2023-08-30 00:05:23,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=95, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2023-08-30 00:05:23,974 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-30 00:05:23,974 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 95 flow [2023-08-30 00:05:23,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 67.75) internal successors, (542), 8 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:23,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:23,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:23,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:24,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:24,181 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:24,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:24,182 INFO L85 PathProgramCache]: Analyzing trace with hash -783039221, now seen corresponding path program 3 times [2023-08-30 00:05:24,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:24,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804696411] [2023-08-30 00:05:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:24,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:24,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:24,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804696411] [2023-08-30 00:05:24,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804696411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:24,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:24,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:05:24,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034808719] [2023-08-30 00:05:24,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:24,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:05:24,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:24,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:05:24,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:05:24,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 160 [2023-08-30 00:05:24,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 20 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:24,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:24,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 160 [2023-08-30 00:05:24,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:24,328 INFO L130 PetriNetUnfolder]: 71/136 cut-off events. [2023-08-30 00:05:24,328 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2023-08-30 00:05:24,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 136 events. 71/136 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 362 event pairs, 21 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 459. Up to 75 conditions per place. [2023-08-30 00:05:24,330 INFO L137 encePairwiseOnDemand]: 155/160 looper letters, 31 selfloop transitions, 6 changer transitions 2/39 dead transitions. [2023-08-30 00:05:24,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 39 transitions, 250 flow [2023-08-30 00:05:24,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:05:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:05:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 368 transitions. [2023-08-30 00:05:24,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-08-30 00:05:24,332 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 368 transitions. [2023-08-30 00:05:24,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 368 transitions. [2023-08-30 00:05:24,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:24,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 368 transitions. [2023-08-30 00:05:24,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.6) internal successors, (368), 5 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:24,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:24,335 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:24,335 INFO L175 Difference]: Start difference. First operand has 32 places, 20 transitions, 95 flow. Second operand 5 states and 368 transitions. [2023-08-30 00:05:24,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 39 transitions, 250 flow [2023-08-30 00:05:24,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 238 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 00:05:24,337 INFO L231 Difference]: Finished difference. Result has 37 places, 22 transitions, 128 flow [2023-08-30 00:05:24,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=37, PETRI_TRANSITIONS=22} [2023-08-30 00:05:24,338 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-08-30 00:05:24,338 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 22 transitions, 128 flow [2023-08-30 00:05:24,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:24,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:24,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:24,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 00:05:24,339 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:24,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:24,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1872146037, now seen corresponding path program 4 times [2023-08-30 00:05:24,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:24,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217142874] [2023-08-30 00:05:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:24,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:24,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:24,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217142874] [2023-08-30 00:05:24,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217142874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:24,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431331777] [2023-08-30 00:05:24,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:05:24,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:24,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:24,396 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:24,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 00:05:24,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:05:24,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:24,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:05:24,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:24,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:24,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431331777] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:24,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:24,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 00:05:24,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51222929] [2023-08-30 00:05:24,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:24,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:05:24,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:24,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:05:24,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:05:24,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:24,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 22 transitions, 128 flow. Second operand has 10 states, 10 states have (on average 67.9) internal successors, (679), 10 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:24,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:24,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:24,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:24,719 INFO L130 PetriNetUnfolder]: 86/161 cut-off events. [2023-08-30 00:05:24,719 INFO L131 PetriNetUnfolder]: For 371/371 co-relation queries the response was YES. [2023-08-30 00:05:24,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 161 events. 86/161 cut-off events. For 371/371 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 471 event pairs, 10 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 633. Up to 102 conditions per place. [2023-08-30 00:05:24,721 INFO L137 encePairwiseOnDemand]: 155/160 looper letters, 38 selfloop transitions, 9 changer transitions 1/48 dead transitions. [2023-08-30 00:05:24,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 329 flow [2023-08-30 00:05:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:05:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:05:24,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 567 transitions. [2023-08-30 00:05:24,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44296875 [2023-08-30 00:05:24,723 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 567 transitions. [2023-08-30 00:05:24,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 567 transitions. [2023-08-30 00:05:24,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:24,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 567 transitions. [2023-08-30 00:05:24,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.875) internal successors, (567), 8 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) [2023-08-30 00:05:24,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 160.0) internal successors, (1440), 9 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) [2023-08-30 00:05:24,727 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 160.0) internal successors, (1440), 9 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) [2023-08-30 00:05:24,728 INFO L175 Difference]: Start difference. First operand has 37 places, 22 transitions, 128 flow. Second operand 8 states and 567 transitions. [2023-08-30 00:05:24,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 329 flow [2023-08-30 00:05:24,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 312 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 00:05:24,731 INFO L231 Difference]: Finished difference. Result has 43 places, 25 transitions, 162 flow [2023-08-30 00:05:24,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=162, PETRI_PLACES=43, PETRI_TRANSITIONS=25} [2023-08-30 00:05:24,732 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2023-08-30 00:05:24,732 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 25 transitions, 162 flow [2023-08-30 00:05:24,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.9) internal successors, (679), 10 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:24,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:24,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:24,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:24,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 00:05:24,938 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:24,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:24,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1361835485, now seen corresponding path program 5 times [2023-08-30 00:05:24,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:24,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616136001] [2023-08-30 00:05:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:24,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:24,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:24,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616136001] [2023-08-30 00:05:24,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616136001] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:24,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:24,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:05:24,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566624483] [2023-08-30 00:05:24,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:24,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:05:24,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:24,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:05:24,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:05:25,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 160 [2023-08-30 00:05:25,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 25 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:25,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:25,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 160 [2023-08-30 00:05:25,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:25,121 INFO L130 PetriNetUnfolder]: 84/159 cut-off events. [2023-08-30 00:05:25,121 INFO L131 PetriNetUnfolder]: For 468/468 co-relation queries the response was YES. [2023-08-30 00:05:25,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 159 events. 84/159 cut-off events. For 468/468 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 435 event pairs, 25 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 657. Up to 87 conditions per place. [2023-08-30 00:05:25,123 INFO L137 encePairwiseOnDemand]: 155/160 looper letters, 26 selfloop transitions, 9 changer transitions 2/37 dead transitions. [2023-08-30 00:05:25,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 291 flow [2023-08-30 00:05:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:05:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:05:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 360 transitions. [2023-08-30 00:05:25,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-08-30 00:05:25,125 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 360 transitions. [2023-08-30 00:05:25,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 360 transitions. [2023-08-30 00:05:25,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:25,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 360 transitions. [2023-08-30 00:05:25,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:25,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:25,129 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:25,129 INFO L175 Difference]: Start difference. First operand has 43 places, 25 transitions, 162 flow. Second operand 5 states and 360 transitions. [2023-08-30 00:05:25,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 291 flow [2023-08-30 00:05:25,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 267 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-30 00:05:25,132 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 190 flow [2023-08-30 00:05:25,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2023-08-30 00:05:25,133 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-08-30 00:05:25,133 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 190 flow [2023-08-30 00:05:25,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:25,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:25,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:25,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 00:05:25,134 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:25,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:25,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2073662635, now seen corresponding path program 6 times [2023-08-30 00:05:25,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:25,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119378075] [2023-08-30 00:05:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:25,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:25,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:25,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119378075] [2023-08-30 00:05:25,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119378075] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:05:25,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:05:25,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:05:25,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46641295] [2023-08-30 00:05:25,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:05:25,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:05:25,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:25,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:05:25,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:05:25,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 160 [2023-08-30 00:05:25,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 27 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:25,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:25,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 160 [2023-08-30 00:05:25,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:25,266 INFO L130 PetriNetUnfolder]: 75/140 cut-off events. [2023-08-30 00:05:25,267 INFO L131 PetriNetUnfolder]: For 547/547 co-relation queries the response was YES. [2023-08-30 00:05:25,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 140 events. 75/140 cut-off events. For 547/547 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 365 event pairs, 21 based on Foata normal form. 6/146 useless extension candidates. Maximal degree in co-relation 603. Up to 87 conditions per place. [2023-08-30 00:05:25,273 INFO L137 encePairwiseOnDemand]: 155/160 looper letters, 28 selfloop transitions, 9 changer transitions 1/38 dead transitions. [2023-08-30 00:05:25,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 38 transitions, 306 flow [2023-08-30 00:05:25,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:05:25,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:05:25,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 362 transitions. [2023-08-30 00:05:25,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2023-08-30 00:05:25,275 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 362 transitions. [2023-08-30 00:05:25,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 362 transitions. [2023-08-30 00:05:25,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:25,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 362 transitions. [2023-08-30 00:05:25,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:25,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:25,279 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:25,279 INFO L175 Difference]: Start difference. First operand has 45 places, 27 transitions, 190 flow. Second operand 5 states and 362 transitions. [2023-08-30 00:05:25,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 38 transitions, 306 flow [2023-08-30 00:05:25,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 38 transitions, 295 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 00:05:25,283 INFO L231 Difference]: Finished difference. Result has 46 places, 26 transitions, 183 flow [2023-08-30 00:05:25,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=46, PETRI_TRANSITIONS=26} [2023-08-30 00:05:25,285 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2023-08-30 00:05:25,285 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 26 transitions, 183 flow [2023-08-30 00:05:25,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:25,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:25,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:25,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 00:05:25,286 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:25,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:25,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1642703886, now seen corresponding path program 1 times [2023-08-30 00:05:25,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:25,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083629415] [2023-08-30 00:05:25,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:25,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:25,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:25,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083629415] [2023-08-30 00:05:25,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083629415] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:25,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040421413] [2023-08-30 00:05:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:25,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:25,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:25,413 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:25,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 00:05:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:25,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:05:25,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:25,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:25,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040421413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:25,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:25,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2023-08-30 00:05:25,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668857420] [2023-08-30 00:05:25,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:25,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:05:25,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:25,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:05:25,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:05:25,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 160 [2023-08-30 00:05:25,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 26 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:25,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:25,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 160 [2023-08-30 00:05:25,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:25,635 INFO L130 PetriNetUnfolder]: 122/230 cut-off events. [2023-08-30 00:05:25,636 INFO L131 PetriNetUnfolder]: For 736/752 co-relation queries the response was YES. [2023-08-30 00:05:25,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 970 conditions, 230 events. 122/230 cut-off events. For 736/752 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 790 event pairs, 16 based on Foata normal form. 19/247 useless extension candidates. Maximal degree in co-relation 955. Up to 113 conditions per place. [2023-08-30 00:05:25,638 INFO L137 encePairwiseOnDemand]: 156/160 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2023-08-30 00:05:25,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 386 flow [2023-08-30 00:05:25,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:05:25,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:05:25,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 331 transitions. [2023-08-30 00:05:25,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171875 [2023-08-30 00:05:25,640 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 331 transitions. [2023-08-30 00:05:25,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 331 transitions. [2023-08-30 00:05:25,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:25,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 331 transitions. [2023-08-30 00:05:25,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 82.75) internal successors, (331), 4 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:25,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:25,643 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:25,644 INFO L175 Difference]: Start difference. First operand has 46 places, 26 transitions, 183 flow. Second operand 4 states and 331 transitions. [2023-08-30 00:05:25,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 386 flow [2023-08-30 00:05:25,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 335 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-08-30 00:05:25,648 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 246 flow [2023-08-30 00:05:25,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=246, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2023-08-30 00:05:25,649 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2023-08-30 00:05:25,649 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 246 flow [2023-08-30 00:05:25,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:25,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:25,650 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:25,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 00:05:25,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:25,855 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:25,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:25,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1382879178, now seen corresponding path program 2 times [2023-08-30 00:05:25,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:25,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41467076] [2023-08-30 00:05:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:25,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:25,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:25,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41467076] [2023-08-30 00:05:25,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41467076] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:25,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421692928] [2023-08-30 00:05:25,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:05:25,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:25,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:25,916 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:25,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 00:05:25,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:05:25,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:25,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:05:25,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:26,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:26,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421692928] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:26,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:26,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 00:05:26,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777044622] [2023-08-30 00:05:26,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:26,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:05:26,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:26,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:05:26,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:05:26,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:26,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 246 flow. Second operand has 12 states, 12 states have (on average 67.08333333333333) internal successors, (805), 12 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:26,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:26,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:26,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:26,440 INFO L130 PetriNetUnfolder]: 236/464 cut-off events. [2023-08-30 00:05:26,441 INFO L131 PetriNetUnfolder]: For 1033/1033 co-relation queries the response was YES. [2023-08-30 00:05:26,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1876 conditions, 464 events. 236/464 cut-off events. For 1033/1033 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2004 event pairs, 7 based on Foata normal form. 16/480 useless extension candidates. Maximal degree in co-relation 1862. Up to 157 conditions per place. [2023-08-30 00:05:26,445 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 83 selfloop transitions, 44 changer transitions 6/133 dead transitions. [2023-08-30 00:05:26,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 133 transitions, 1055 flow [2023-08-30 00:05:26,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 00:05:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 00:05:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1410 transitions. [2023-08-30 00:05:26,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2023-08-30 00:05:26,449 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1410 transitions. [2023-08-30 00:05:26,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1410 transitions. [2023-08-30 00:05:26,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:26,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1410 transitions. [2023-08-30 00:05:26,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 70.5) internal successors, (1410), 20 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:26,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 160.0) internal successors, (3360), 21 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:26,462 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 160.0) internal successors, (3360), 21 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:26,463 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 246 flow. Second operand 20 states and 1410 transitions. [2023-08-30 00:05:26,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 133 transitions, 1055 flow [2023-08-30 00:05:26,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 133 transitions, 1021 flow, removed 17 selfloop flow, removed 0 redundant places. [2023-08-30 00:05:26,468 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 701 flow [2023-08-30 00:05:26,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=701, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2023-08-30 00:05:26,470 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2023-08-30 00:05:26,470 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 701 flow [2023-08-30 00:05:26,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 67.08333333333333) internal successors, (805), 12 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:26,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:26,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:26,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:26,676 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 [2023-08-30 00:05:26,677 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:26,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:26,677 INFO L85 PathProgramCache]: Analyzing trace with hash 482026770, now seen corresponding path program 3 times [2023-08-30 00:05:26,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:26,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830094391] [2023-08-30 00:05:26,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:26,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:26,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:26,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830094391] [2023-08-30 00:05:26,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830094391] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:26,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891869739] [2023-08-30 00:05:26,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:05:26,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:26,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:26,766 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:26,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 00:05:26,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 00:05:26,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:26,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:05:26,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:26,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:26,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891869739] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:26,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:26,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 00:05:26,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865851233] [2023-08-30 00:05:26,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:26,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 00:05:26,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:26,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 00:05:26,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-30 00:05:26,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:26,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 701 flow. Second operand has 11 states, 11 states have (on average 67.0909090909091) internal successors, (738), 11 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:26,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:26,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:26,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:27,166 INFO L130 PetriNetUnfolder]: 246/505 cut-off events. [2023-08-30 00:05:27,167 INFO L131 PetriNetUnfolder]: For 2030/2030 co-relation queries the response was YES. [2023-08-30 00:05:27,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2452 conditions, 505 events. 246/505 cut-off events. For 2030/2030 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2338 event pairs, 23 based on Foata normal form. 12/517 useless extension candidates. Maximal degree in co-relation 2430. Up to 346 conditions per place. [2023-08-30 00:05:27,172 INFO L137 encePairwiseOnDemand]: 155/160 looper letters, 84 selfloop transitions, 19 changer transitions 12/115 dead transitions. [2023-08-30 00:05:27,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 115 transitions, 1248 flow [2023-08-30 00:05:27,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:05:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:05:27,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 503 transitions. [2023-08-30 00:05:27,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44910714285714287 [2023-08-30 00:05:27,174 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 503 transitions. [2023-08-30 00:05:27,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 503 transitions. [2023-08-30 00:05:27,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:27,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 503 transitions. [2023-08-30 00:05:27,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.85714285714286) internal successors, (503), 7 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:27,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 160.0) internal successors, (1280), 8 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:27,178 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 160.0) internal successors, (1280), 8 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:27,178 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 701 flow. Second operand 7 states and 503 transitions. [2023-08-30 00:05:27,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 115 transitions, 1248 flow [2023-08-30 00:05:27,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 115 transitions, 957 flow, removed 130 selfloop flow, removed 6 redundant places. [2023-08-30 00:05:27,193 INFO L231 Difference]: Finished difference. Result has 73 places, 81 transitions, 665 flow [2023-08-30 00:05:27,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=665, PETRI_PLACES=73, PETRI_TRANSITIONS=81} [2023-08-30 00:05:27,194 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2023-08-30 00:05:27,194 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 81 transitions, 665 flow [2023-08-30 00:05:27,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 67.0909090909091) internal successors, (738), 11 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:27,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:27,195 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:27,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:27,401 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 [2023-08-30 00:05:27,402 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:27,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:27,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1700633170, now seen corresponding path program 4 times [2023-08-30 00:05:27,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:27,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105236593] [2023-08-30 00:05:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:27,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:27,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:27,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105236593] [2023-08-30 00:05:27,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105236593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:27,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151063440] [2023-08-30 00:05:27,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:05:27,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:27,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:27,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:27,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 00:05:27,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:05:27,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:27,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:05:27,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:27,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:27,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151063440] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:27,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:27,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 00:05:27,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029071842] [2023-08-30 00:05:27,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:27,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:05:27,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:27,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:05:27,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:05:27,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:27,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 81 transitions, 665 flow. Second operand has 12 states, 12 states have (on average 67.25) internal successors, (807), 12 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:27,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:27,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:27,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:28,043 INFO L130 PetriNetUnfolder]: 232/475 cut-off events. [2023-08-30 00:05:28,043 INFO L131 PetriNetUnfolder]: For 1630/1630 co-relation queries the response was YES. [2023-08-30 00:05:28,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2023 conditions, 475 events. 232/475 cut-off events. For 1630/1630 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2221 event pairs, 7 based on Foata normal form. 34/509 useless extension candidates. Maximal degree in co-relation 1998. Up to 204 conditions per place. [2023-08-30 00:05:28,048 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 76 selfloop transitions, 46 changer transitions 7/129 dead transitions. [2023-08-30 00:05:28,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 129 transitions, 1164 flow [2023-08-30 00:05:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 00:05:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 00:05:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 998 transitions. [2023-08-30 00:05:28,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4455357142857143 [2023-08-30 00:05:28,052 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 998 transitions. [2023-08-30 00:05:28,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 998 transitions. [2023-08-30 00:05:28,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:28,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 998 transitions. [2023-08-30 00:05:28,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 71.28571428571429) internal successors, (998), 14 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:28,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 160.0) internal successors, (2400), 15 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:28,060 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 160.0) internal successors, (2400), 15 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:28,060 INFO L175 Difference]: Start difference. First operand has 73 places, 81 transitions, 665 flow. Second operand 14 states and 998 transitions. [2023-08-30 00:05:28,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 129 transitions, 1164 flow [2023-08-30 00:05:28,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 129 transitions, 1083 flow, removed 35 selfloop flow, removed 5 redundant places. [2023-08-30 00:05:28,074 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 760 flow [2023-08-30 00:05:28,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=760, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2023-08-30 00:05:28,076 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2023-08-30 00:05:28,076 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 760 flow [2023-08-30 00:05:28,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 67.25) internal successors, (807), 12 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:28,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:28,078 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:28,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:28,287 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 [2023-08-30 00:05:28,288 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:28,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:28,288 INFO L85 PathProgramCache]: Analyzing trace with hash 951774190, now seen corresponding path program 5 times [2023-08-30 00:05:28,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:28,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572684286] [2023-08-30 00:05:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:28,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:28,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:28,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572684286] [2023-08-30 00:05:28,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572684286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:28,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277104339] [2023-08-30 00:05:28,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:05:28,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:28,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:28,385 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:28,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 00:05:28,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:05:28,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:28,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:05:28,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:28,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:28,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277104339] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:28,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:28,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 00:05:28,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285430187] [2023-08-30 00:05:28,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:28,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 00:05:28,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:28,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 00:05:28,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-30 00:05:28,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:28,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 760 flow. Second operand has 15 states, 15 states have (on average 66.8) internal successors, (1002), 15 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:28,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:28,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:28,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:28,930 INFO L130 PetriNetUnfolder]: 294/606 cut-off events. [2023-08-30 00:05:28,930 INFO L131 PetriNetUnfolder]: For 2189/2189 co-relation queries the response was YES. [2023-08-30 00:05:28,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2657 conditions, 606 events. 294/606 cut-off events. For 2189/2189 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2989 event pairs, 61 based on Foata normal form. 42/648 useless extension candidates. Maximal degree in co-relation 2632. Up to 320 conditions per place. [2023-08-30 00:05:28,936 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 105 selfloop transitions, 47 changer transitions 3/155 dead transitions. [2023-08-30 00:05:28,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 155 transitions, 1540 flow [2023-08-30 00:05:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 00:05:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 00:05:28,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 936 transitions. [2023-08-30 00:05:28,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-08-30 00:05:28,940 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 936 transitions. [2023-08-30 00:05:28,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 936 transitions. [2023-08-30 00:05:28,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:28,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 936 transitions. [2023-08-30 00:05:28,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 72.0) internal successors, (936), 13 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:28,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 160.0) internal successors, (2240), 14 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:28,945 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 160.0) internal successors, (2240), 14 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:28,945 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 760 flow. Second operand 13 states and 936 transitions. [2023-08-30 00:05:28,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 155 transitions, 1540 flow [2023-08-30 00:05:28,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 155 transitions, 1485 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-30 00:05:28,958 INFO L231 Difference]: Finished difference. Result has 95 places, 104 transitions, 1168 flow [2023-08-30 00:05:28,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1168, PETRI_PLACES=95, PETRI_TRANSITIONS=104} [2023-08-30 00:05:28,959 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2023-08-30 00:05:28,959 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 104 transitions, 1168 flow [2023-08-30 00:05:28,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 66.8) internal successors, (1002), 15 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:28,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:28,960 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:28,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:29,166 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 [2023-08-30 00:05:29,167 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:29,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:29,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1636516100, now seen corresponding path program 6 times [2023-08-30 00:05:29,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:29,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196449033] [2023-08-30 00:05:29,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:29,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:29,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:29,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196449033] [2023-08-30 00:05:29,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196449033] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:29,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138641233] [2023-08-30 00:05:29,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:05:29,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:29,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:29,238 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:29,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 00:05:29,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 00:05:29,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:29,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:05:29,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:29,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:29,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138641233] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:29,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:29,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-30 00:05:29,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871739159] [2023-08-30 00:05:29,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:29,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 00:05:29,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:29,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 00:05:29,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-30 00:05:29,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:29,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 104 transitions, 1168 flow. Second operand has 13 states, 13 states have (on average 66.92307692307692) internal successors, (870), 13 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:29,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:29,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:29,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:29,709 INFO L130 PetriNetUnfolder]: 309/631 cut-off events. [2023-08-30 00:05:29,709 INFO L131 PetriNetUnfolder]: For 4208/4208 co-relation queries the response was YES. [2023-08-30 00:05:29,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3317 conditions, 631 events. 309/631 cut-off events. For 4208/4208 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3146 event pairs, 28 based on Foata normal form. 6/637 useless extension candidates. Maximal degree in co-relation 3284. Up to 177 conditions per place. [2023-08-30 00:05:29,716 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 85 selfloop transitions, 69 changer transitions 8/162 dead transitions. [2023-08-30 00:05:29,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 162 transitions, 1910 flow [2023-08-30 00:05:29,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 00:05:29,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 00:05:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1191 transitions. [2023-08-30 00:05:29,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43786764705882353 [2023-08-30 00:05:29,721 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1191 transitions. [2023-08-30 00:05:29,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1191 transitions. [2023-08-30 00:05:29,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:29,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1191 transitions. [2023-08-30 00:05:29,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 70.05882352941177) internal successors, (1191), 17 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:29,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 160.0) internal successors, (2880), 18 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:29,732 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 160.0) internal successors, (2880), 18 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:29,732 INFO L175 Difference]: Start difference. First operand has 95 places, 104 transitions, 1168 flow. Second operand 17 states and 1191 transitions. [2023-08-30 00:05:29,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 162 transitions, 1910 flow [2023-08-30 00:05:29,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 162 transitions, 1678 flow, removed 105 selfloop flow, removed 3 redundant places. [2023-08-30 00:05:29,759 INFO L231 Difference]: Finished difference. Result has 113 places, 117 transitions, 1298 flow [2023-08-30 00:05:29,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1298, PETRI_PLACES=113, PETRI_TRANSITIONS=117} [2023-08-30 00:05:29,760 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2023-08-30 00:05:29,760 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 117 transitions, 1298 flow [2023-08-30 00:05:29,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.92307692307692) internal successors, (870), 13 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:29,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:29,761 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:29,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:29,974 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 [2023-08-30 00:05:29,974 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:29,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:29,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1496503897, now seen corresponding path program 7 times [2023-08-30 00:05:29,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:29,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103623023] [2023-08-30 00:05:29,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:29,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:05:30,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:30,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103623023] [2023-08-30 00:05:30,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103623023] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:30,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470661976] [2023-08-30 00:05:30,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:05:30,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:30,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:30,122 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:30,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 00:05:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:30,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:05:30,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:05:30,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:05:30,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470661976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:30,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:30,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-30 00:05:30,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095044254] [2023-08-30 00:05:30,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:30,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:05:30,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:30,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:05:30,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:05:30,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 160 [2023-08-30 00:05:30,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 117 transitions, 1298 flow. Second operand has 5 states, 5 states have (on average 77.0) internal successors, (385), 5 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:30,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:30,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 160 [2023-08-30 00:05:30,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:30,493 INFO L130 PetriNetUnfolder]: 525/1068 cut-off events. [2023-08-30 00:05:30,493 INFO L131 PetriNetUnfolder]: For 6888/6898 co-relation queries the response was YES. [2023-08-30 00:05:30,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5779 conditions, 1068 events. 525/1068 cut-off events. For 6888/6898 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6177 event pairs, 57 based on Foata normal form. 30/1096 useless extension candidates. Maximal degree in co-relation 5740. Up to 464 conditions per place. [2023-08-30 00:05:30,506 INFO L137 encePairwiseOnDemand]: 156/160 looper letters, 124 selfloop transitions, 58 changer transitions 47/236 dead transitions. [2023-08-30 00:05:30,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 236 transitions, 2952 flow [2023-08-30 00:05:30,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:05:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:05:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2023-08-30 00:05:30,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2023-08-30 00:05:30,508 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2023-08-30 00:05:30,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2023-08-30 00:05:30,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:30,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2023-08-30 00:05:30,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:30,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:30,510 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:30,511 INFO L175 Difference]: Start difference. First operand has 113 places, 117 transitions, 1298 flow. Second operand 5 states and 416 transitions. [2023-08-30 00:05:30,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 236 transitions, 2952 flow [2023-08-30 00:05:30,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 236 transitions, 2778 flow, removed 68 selfloop flow, removed 3 redundant places. [2023-08-30 00:05:30,540 INFO L231 Difference]: Finished difference. Result has 116 places, 154 transitions, 1954 flow [2023-08-30 00:05:30,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1954, PETRI_PLACES=116, PETRI_TRANSITIONS=154} [2023-08-30 00:05:30,541 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 87 predicate places. [2023-08-30 00:05:30,541 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 154 transitions, 1954 flow [2023-08-30 00:05:30,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.0) internal successors, (385), 5 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:30,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:30,542 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:30,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:30,748 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 [2023-08-30 00:05:30,749 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:30,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash -2099844861, now seen corresponding path program 8 times [2023-08-30 00:05:30,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:30,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778205452] [2023-08-30 00:05:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:30,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:30,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:30,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778205452] [2023-08-30 00:05:30,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778205452] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:30,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892267968] [2023-08-30 00:05:30,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:05:30,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:30,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:30,846 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:30,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 00:05:30,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:05:30,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:30,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:05:30,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:30,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:31,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892267968] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:31,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:31,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-30 00:05:31,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464990855] [2023-08-30 00:05:31,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:31,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 00:05:31,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:31,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 00:05:31,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-08-30 00:05:31,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:31,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 154 transitions, 1954 flow. Second operand has 15 states, 15 states have (on average 66.86666666666666) internal successors, (1003), 15 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:31,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:31,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:31,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:31,826 INFO L130 PetriNetUnfolder]: 680/1466 cut-off events. [2023-08-30 00:05:31,826 INFO L131 PetriNetUnfolder]: For 12258/12258 co-relation queries the response was YES. [2023-08-30 00:05:31,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8580 conditions, 1466 events. 680/1466 cut-off events. For 12258/12258 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9521 event pairs, 15 based on Foata normal form. 24/1490 useless extension candidates. Maximal degree in co-relation 8537. Up to 331 conditions per place. [2023-08-30 00:05:31,845 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 152 selfloop transitions, 156 changer transitions 21/329 dead transitions. [2023-08-30 00:05:31,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 329 transitions, 4269 flow [2023-08-30 00:05:31,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 00:05:31,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 00:05:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2319 transitions. [2023-08-30 00:05:31,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43920454545454546 [2023-08-30 00:05:31,849 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2319 transitions. [2023-08-30 00:05:31,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2319 transitions. [2023-08-30 00:05:31,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:31,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2319 transitions. [2023-08-30 00:05:31,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 70.27272727272727) internal successors, (2319), 33 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:31,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 160.0) internal successors, (5440), 34 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:31,862 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 160.0) internal successors, (5440), 34 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:31,862 INFO L175 Difference]: Start difference. First operand has 116 places, 154 transitions, 1954 flow. Second operand 33 states and 2319 transitions. [2023-08-30 00:05:31,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 329 transitions, 4269 flow [2023-08-30 00:05:31,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 329 transitions, 4101 flow, removed 62 selfloop flow, removed 1 redundant places. [2023-08-30 00:05:31,916 INFO L231 Difference]: Finished difference. Result has 160 places, 224 transitions, 3493 flow [2023-08-30 00:05:31,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3493, PETRI_PLACES=160, PETRI_TRANSITIONS=224} [2023-08-30 00:05:31,917 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 131 predicate places. [2023-08-30 00:05:31,917 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 224 transitions, 3493 flow [2023-08-30 00:05:31,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 66.86666666666666) internal successors, (1003), 15 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:31,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:31,918 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:31,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:32,124 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 [2023-08-30 00:05:32,124 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:32,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:32,125 INFO L85 PathProgramCache]: Analyzing trace with hash 66051951, now seen corresponding path program 9 times [2023-08-30 00:05:32,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:32,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003059313] [2023-08-30 00:05:32,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:32,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:32,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:32,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003059313] [2023-08-30 00:05:32,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003059313] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:32,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392880343] [2023-08-30 00:05:32,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:05:32,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:32,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:32,269 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:32,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 00:05:32,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:05:32,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:32,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:05:32,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:32,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:32,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392880343] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:32,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:32,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-30 00:05:32,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383704277] [2023-08-30 00:05:32,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:32,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:05:32,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:32,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:05:32,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:05:32,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:32,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 224 transitions, 3493 flow. Second operand has 14 states, 14 states have (on average 66.85714285714286) internal successors, (936), 14 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:32,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:32,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:32,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:32,974 INFO L130 PetriNetUnfolder]: 767/1617 cut-off events. [2023-08-30 00:05:32,975 INFO L131 PetriNetUnfolder]: For 24032/24032 co-relation queries the response was YES. [2023-08-30 00:05:32,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11160 conditions, 1617 events. 767/1617 cut-off events. For 24032/24032 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 10629 event pairs, 87 based on Foata normal form. 36/1653 useless extension candidates. Maximal degree in co-relation 11104. Up to 1257 conditions per place. [2023-08-30 00:05:32,996 INFO L137 encePairwiseOnDemand]: 155/160 looper letters, 239 selfloop transitions, 50 changer transitions 24/313 dead transitions. [2023-08-30 00:05:32,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 313 transitions, 5331 flow [2023-08-30 00:05:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:05:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 00:05:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 645 transitions. [2023-08-30 00:05:32,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2023-08-30 00:05:32,999 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 645 transitions. [2023-08-30 00:05:32,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 645 transitions. [2023-08-30 00:05:32,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:32,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 645 transitions. [2023-08-30 00:05:33,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 71.66666666666667) internal successors, (645), 9 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:33,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 160.0) internal successors, (1600), 10 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:33,003 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 160.0) internal successors, (1600), 10 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:33,003 INFO L175 Difference]: Start difference. First operand has 160 places, 224 transitions, 3493 flow. Second operand 9 states and 645 transitions. [2023-08-30 00:05:33,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 313 transitions, 5331 flow [2023-08-30 00:05:33,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 313 transitions, 4345 flow, removed 418 selfloop flow, removed 12 redundant places. [2023-08-30 00:05:33,151 INFO L231 Difference]: Finished difference. Result has 158 places, 252 transitions, 3406 flow [2023-08-30 00:05:33,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3406, PETRI_PLACES=158, PETRI_TRANSITIONS=252} [2023-08-30 00:05:33,152 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 129 predicate places. [2023-08-30 00:05:33,152 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 252 transitions, 3406 flow [2023-08-30 00:05:33,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 66.85714285714286) internal successors, (936), 14 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:33,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:33,153 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:33,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:33,354 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 [2023-08-30 00:05:33,355 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:33,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:33,355 INFO L85 PathProgramCache]: Analyzing trace with hash 32542007, now seen corresponding path program 10 times [2023-08-30 00:05:33,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:33,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005558174] [2023-08-30 00:05:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:33,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:33,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:33,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005558174] [2023-08-30 00:05:33,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005558174] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:33,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537833170] [2023-08-30 00:05:33,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:05:33,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:33,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:33,468 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:33,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 00:05:33,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:05:33,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:33,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:05:33,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:33,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:33,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537833170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:33,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:33,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 00:05:33,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368533423] [2023-08-30 00:05:33,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:33,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 00:05:33,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:33,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 00:05:33,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-30 00:05:33,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:33,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 252 transitions, 3406 flow. Second operand has 16 states, 16 states have (on average 67.0625) internal successors, (1073), 16 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:33,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:33,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:33,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:34,384 INFO L130 PetriNetUnfolder]: 934/1910 cut-off events. [2023-08-30 00:05:34,385 INFO L131 PetriNetUnfolder]: For 27060/27060 co-relation queries the response was YES. [2023-08-30 00:05:34,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12396 conditions, 1910 events. 934/1910 cut-off events. For 27060/27060 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 12712 event pairs, 93 based on Foata normal form. 78/1988 useless extension candidates. Maximal degree in co-relation 12340. Up to 1501 conditions per place. [2023-08-30 00:05:34,408 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 271 selfloop transitions, 90 changer transitions 3/364 dead transitions. [2023-08-30 00:05:34,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 364 transitions, 5455 flow [2023-08-30 00:05:34,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 00:05:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 00:05:34,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 996 transitions. [2023-08-30 00:05:34,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4446428571428571 [2023-08-30 00:05:34,411 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 996 transitions. [2023-08-30 00:05:34,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 996 transitions. [2023-08-30 00:05:34,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:34,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 996 transitions. [2023-08-30 00:05:34,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 71.14285714285714) internal successors, (996), 14 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:34,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 160.0) internal successors, (2400), 15 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:34,419 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 160.0) internal successors, (2400), 15 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:34,419 INFO L175 Difference]: Start difference. First operand has 158 places, 252 transitions, 3406 flow. Second operand 14 states and 996 transitions. [2023-08-30 00:05:34,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 364 transitions, 5455 flow [2023-08-30 00:05:34,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 364 transitions, 5381 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-08-30 00:05:34,529 INFO L231 Difference]: Finished difference. Result has 172 places, 300 transitions, 4486 flow [2023-08-30 00:05:34,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=3356, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4486, PETRI_PLACES=172, PETRI_TRANSITIONS=300} [2023-08-30 00:05:34,530 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 143 predicate places. [2023-08-30 00:05:34,530 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 300 transitions, 4486 flow [2023-08-30 00:05:34,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.0625) internal successors, (1073), 16 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:34,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:34,531 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:34,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:34,731 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 [2023-08-30 00:05:34,732 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:34,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:34,732 INFO L85 PathProgramCache]: Analyzing trace with hash 967265555, now seen corresponding path program 11 times [2023-08-30 00:05:34,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:34,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533741946] [2023-08-30 00:05:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:34,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:34,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:34,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533741946] [2023-08-30 00:05:34,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533741946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:34,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102429810] [2023-08-30 00:05:34,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:05:34,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:34,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:34,833 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:34,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 00:05:34,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:05:34,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:34,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:05:34,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:34,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:35,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102429810] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:35,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:35,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-30 00:05:35,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872987855] [2023-08-30 00:05:35,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:35,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 00:05:35,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:35,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 00:05:35,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-30 00:05:35,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:35,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 300 transitions, 4486 flow. Second operand has 15 states, 15 states have (on average 67.0) internal successors, (1005), 15 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:35,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:35,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:35,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:35,791 INFO L130 PetriNetUnfolder]: 990/2007 cut-off events. [2023-08-30 00:05:35,792 INFO L131 PetriNetUnfolder]: For 31563/31563 co-relation queries the response was YES. [2023-08-30 00:05:35,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13874 conditions, 2007 events. 990/2007 cut-off events. For 31563/31563 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 13381 event pairs, 73 based on Foata normal form. 56/2063 useless extension candidates. Maximal degree in co-relation 13814. Up to 1323 conditions per place. [2023-08-30 00:05:35,838 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 243 selfloop transitions, 137 changer transitions 4/384 dead transitions. [2023-08-30 00:05:35,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 384 transitions, 6098 flow [2023-08-30 00:05:35,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 00:05:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 00:05:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1136 transitions. [2023-08-30 00:05:35,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2023-08-30 00:05:35,841 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1136 transitions. [2023-08-30 00:05:35,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1136 transitions. [2023-08-30 00:05:35,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:35,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1136 transitions. [2023-08-30 00:05:35,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 71.0) internal successors, (1136), 16 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:35,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 160.0) internal successors, (2720), 17 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:35,848 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 160.0) internal successors, (2720), 17 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:35,848 INFO L175 Difference]: Start difference. First operand has 172 places, 300 transitions, 4486 flow. Second operand 16 states and 1136 transitions. [2023-08-30 00:05:35,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 384 transitions, 6098 flow [2023-08-30 00:05:36,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 384 transitions, 5924 flow, removed 75 selfloop flow, removed 5 redundant places. [2023-08-30 00:05:36,007 INFO L231 Difference]: Finished difference. Result has 185 places, 323 transitions, 5102 flow [2023-08-30 00:05:36,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=4288, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5102, PETRI_PLACES=185, PETRI_TRANSITIONS=323} [2023-08-30 00:05:36,007 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 156 predicate places. [2023-08-30 00:05:36,007 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 323 transitions, 5102 flow [2023-08-30 00:05:36,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 67.0) internal successors, (1005), 15 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:36,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:36,008 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:36,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:36,208 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 [2023-08-30 00:05:36,209 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:36,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:36,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1635522459, now seen corresponding path program 12 times [2023-08-30 00:05:36,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:36,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616178264] [2023-08-30 00:05:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:36,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:36,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:36,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616178264] [2023-08-30 00:05:36,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616178264] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:36,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571353392] [2023-08-30 00:05:36,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:05:36,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:36,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:36,303 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:36,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 00:05:36,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 00:05:36,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:36,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:05:36,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:36,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:36,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571353392] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:36,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:36,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-30 00:05:36,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986271015] [2023-08-30 00:05:36,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:36,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 00:05:36,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:36,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 00:05:36,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-08-30 00:05:36,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:36,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 323 transitions, 5102 flow. Second operand has 15 states, 15 states have (on average 67.0) internal successors, (1005), 15 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:36,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:36,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:36,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:37,226 INFO L130 PetriNetUnfolder]: 964/1955 cut-off events. [2023-08-30 00:05:37,227 INFO L131 PetriNetUnfolder]: For 33927/33927 co-relation queries the response was YES. [2023-08-30 00:05:37,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14102 conditions, 1955 events. 964/1955 cut-off events. For 33927/33927 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 12967 event pairs, 47 based on Foata normal form. 42/1997 useless extension candidates. Maximal degree in co-relation 14040. Up to 592 conditions per place. [2023-08-30 00:05:37,250 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 178 selfloop transitions, 213 changer transitions 0/391 dead transitions. [2023-08-30 00:05:37,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 391 transitions, 6381 flow [2023-08-30 00:05:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 00:05:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 00:05:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1558 transitions. [2023-08-30 00:05:37,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426136363636364 [2023-08-30 00:05:37,254 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1558 transitions. [2023-08-30 00:05:37,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1558 transitions. [2023-08-30 00:05:37,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:37,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1558 transitions. [2023-08-30 00:05:37,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 70.81818181818181) internal successors, (1558), 22 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:37,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 160.0) internal successors, (3680), 23 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:37,261 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 160.0) internal successors, (3680), 23 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:37,261 INFO L175 Difference]: Start difference. First operand has 185 places, 323 transitions, 5102 flow. Second operand 22 states and 1558 transitions. [2023-08-30 00:05:37,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 391 transitions, 6381 flow [2023-08-30 00:05:37,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 391 transitions, 6119 flow, removed 49 selfloop flow, removed 13 redundant places. [2023-08-30 00:05:37,465 INFO L231 Difference]: Finished difference. Result has 194 places, 321 transitions, 5436 flow [2023-08-30 00:05:37,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=4769, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5436, PETRI_PLACES=194, PETRI_TRANSITIONS=321} [2023-08-30 00:05:37,469 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 165 predicate places. [2023-08-30 00:05:37,469 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 321 transitions, 5436 flow [2023-08-30 00:05:37,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 67.0) internal successors, (1005), 15 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:37,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:37,470 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:37,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 00:05:37,675 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 [2023-08-30 00:05:37,676 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:37,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:37,676 INFO L85 PathProgramCache]: Analyzing trace with hash -686477479, now seen corresponding path program 13 times [2023-08-30 00:05:37,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:37,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340176612] [2023-08-30 00:05:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:37,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:37,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:37,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340176612] [2023-08-30 00:05:37,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340176612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:37,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455413047] [2023-08-30 00:05:37,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:05:37,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:37,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:37,776 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:37,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 00:05:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:37,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:05:37,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:37,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:37,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455413047] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:37,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:37,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-30 00:05:37,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512557367] [2023-08-30 00:05:37,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:37,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:05:37,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:37,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:05:37,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:05:38,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:38,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 321 transitions, 5436 flow. Second operand has 18 states, 18 states have (on average 67.0) internal successors, (1206), 18 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:38,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:38,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:38,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:38,966 INFO L130 PetriNetUnfolder]: 1416/2787 cut-off events. [2023-08-30 00:05:38,967 INFO L131 PetriNetUnfolder]: For 50938/50938 co-relation queries the response was YES. [2023-08-30 00:05:38,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21301 conditions, 2787 events. 1416/2787 cut-off events. For 50938/50938 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19407 event pairs, 81 based on Foata normal form. 28/2815 useless extension candidates. Maximal degree in co-relation 21238. Up to 1700 conditions per place. [2023-08-30 00:05:39,001 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 330 selfloop transitions, 230 changer transitions 3/563 dead transitions. [2023-08-30 00:05:39,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 563 transitions, 10305 flow [2023-08-30 00:05:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 00:05:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 00:05:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1424 transitions. [2023-08-30 00:05:39,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2023-08-30 00:05:39,007 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1424 transitions. [2023-08-30 00:05:39,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1424 transitions. [2023-08-30 00:05:39,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:39,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1424 transitions. [2023-08-30 00:05:39,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 71.2) internal successors, (1424), 20 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:39,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 160.0) internal successors, (3360), 21 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:39,013 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 160.0) internal successors, (3360), 21 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:39,013 INFO L175 Difference]: Start difference. First operand has 194 places, 321 transitions, 5436 flow. Second operand 20 states and 1424 transitions. [2023-08-30 00:05:39,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 563 transitions, 10305 flow [2023-08-30 00:05:39,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 563 transitions, 9813 flow, removed 56 selfloop flow, removed 17 redundant places. [2023-08-30 00:05:39,345 INFO L231 Difference]: Finished difference. Result has 207 places, 470 transitions, 8858 flow [2023-08-30 00:05:39,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=5145, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8858, PETRI_PLACES=207, PETRI_TRANSITIONS=470} [2023-08-30 00:05:39,346 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2023-08-30 00:05:39,346 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 470 transitions, 8858 flow [2023-08-30 00:05:39,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 67.0) internal successors, (1206), 18 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:39,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:39,346 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:39,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:39,547 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 [2023-08-30 00:05:39,547 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:39,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:39,548 INFO L85 PathProgramCache]: Analyzing trace with hash -259973973, now seen corresponding path program 14 times [2023-08-30 00:05:39,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:39,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091616739] [2023-08-30 00:05:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:39,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:39,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:39,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091616739] [2023-08-30 00:05:39,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091616739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:39,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361846396] [2023-08-30 00:05:39,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:05:39,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:39,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:39,678 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:39,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 00:05:39,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:05:39,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:39,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:05:39,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:39,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:39,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361846396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:39,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:39,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-08-30 00:05:39,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685029445] [2023-08-30 00:05:39,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:39,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 00:05:39,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:39,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 00:05:39,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-30 00:05:39,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:39,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 470 transitions, 8858 flow. Second operand has 15 states, 15 states have (on average 66.86666666666666) internal successors, (1003), 15 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:39,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:39,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:39,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:41,111 INFO L130 PetriNetUnfolder]: 1764/3484 cut-off events. [2023-08-30 00:05:41,111 INFO L131 PetriNetUnfolder]: For 77995/77995 co-relation queries the response was YES. [2023-08-30 00:05:41,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28534 conditions, 3484 events. 1764/3484 cut-off events. For 77995/77995 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25301 event pairs, 79 based on Foata normal form. 74/3558 useless extension candidates. Maximal degree in co-relation 28460. Up to 1259 conditions per place. [2023-08-30 00:05:41,157 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 262 selfloop transitions, 409 changer transitions 8/679 dead transitions. [2023-08-30 00:05:41,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 679 transitions, 13326 flow [2023-08-30 00:05:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 00:05:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 00:05:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1491 transitions. [2023-08-30 00:05:41,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2023-08-30 00:05:41,161 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1491 transitions. [2023-08-30 00:05:41,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1491 transitions. [2023-08-30 00:05:41,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:41,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1491 transitions. [2023-08-30 00:05:41,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 71.0) internal successors, (1491), 21 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:41,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 160.0) internal successors, (3520), 22 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:41,168 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 160.0) internal successors, (3520), 22 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:41,168 INFO L175 Difference]: Start difference. First operand has 207 places, 470 transitions, 8858 flow. Second operand 21 states and 1491 transitions. [2023-08-30 00:05:41,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 679 transitions, 13326 flow [2023-08-30 00:05:41,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 679 transitions, 12816 flow, removed 239 selfloop flow, removed 4 redundant places. [2023-08-30 00:05:41,807 INFO L231 Difference]: Finished difference. Result has 231 places, 586 transitions, 12089 flow [2023-08-30 00:05:41,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=8418, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=12089, PETRI_PLACES=231, PETRI_TRANSITIONS=586} [2023-08-30 00:05:41,808 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 202 predicate places. [2023-08-30 00:05:41,808 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 586 transitions, 12089 flow [2023-08-30 00:05:41,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 66.86666666666666) internal successors, (1003), 15 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:41,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:41,809 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:41,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:42,014 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 [2023-08-30 00:05:42,015 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:42,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:42,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1177898229, now seen corresponding path program 15 times [2023-08-30 00:05:42,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:42,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418375430] [2023-08-30 00:05:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:42,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:42,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:42,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418375430] [2023-08-30 00:05:42,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418375430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:42,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669676328] [2023-08-30 00:05:42,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:05:42,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:42,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:42,122 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:42,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 00:05:42,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:05:42,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:42,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:05:42,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:42,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:42,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669676328] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:42,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:42,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-30 00:05:42,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091680881] [2023-08-30 00:05:42,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:42,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 00:05:42,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:42,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 00:05:42,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-08-30 00:05:42,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:42,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 586 transitions, 12089 flow. Second operand has 20 states, 20 states have (on average 66.55) internal successors, (1331), 20 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:42,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:42,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:42,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:43,583 INFO L130 PetriNetUnfolder]: 1871/3689 cut-off events. [2023-08-30 00:05:43,584 INFO L131 PetriNetUnfolder]: For 109462/109462 co-relation queries the response was YES. [2023-08-30 00:05:43,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32414 conditions, 3689 events. 1871/3689 cut-off events. For 109462/109462 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26890 event pairs, 580 based on Foata normal form. 104/3793 useless extension candidates. Maximal degree in co-relation 32332. Up to 2909 conditions per place. [2023-08-30 00:05:43,702 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 579 selfloop transitions, 133 changer transitions 14/726 dead transitions. [2023-08-30 00:05:43,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 726 transitions, 15439 flow [2023-08-30 00:05:43,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 00:05:43,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 00:05:43,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1506 transitions. [2023-08-30 00:05:43,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44821428571428573 [2023-08-30 00:05:43,706 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1506 transitions. [2023-08-30 00:05:43,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1506 transitions. [2023-08-30 00:05:43,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:43,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1506 transitions. [2023-08-30 00:05:43,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 71.71428571428571) internal successors, (1506), 21 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:43,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 160.0) internal successors, (3520), 22 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:43,717 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 160.0) internal successors, (3520), 22 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:43,717 INFO L175 Difference]: Start difference. First operand has 231 places, 586 transitions, 12089 flow. Second operand 21 states and 1506 transitions. [2023-08-30 00:05:43,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 726 transitions, 15439 flow [2023-08-30 00:05:44,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 726 transitions, 15010 flow, removed 191 selfloop flow, removed 8 redundant places. [2023-08-30 00:05:44,491 INFO L231 Difference]: Finished difference. Result has 253 places, 637 transitions, 13470 flow [2023-08-30 00:05:44,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=11660, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=13470, PETRI_PLACES=253, PETRI_TRANSITIONS=637} [2023-08-30 00:05:44,492 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 224 predicate places. [2023-08-30 00:05:44,492 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 637 transitions, 13470 flow [2023-08-30 00:05:44,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.55) internal successors, (1331), 20 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:44,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:44,493 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:44,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-30 00:05:44,699 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 [2023-08-30 00:05:44,699 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:44,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:44,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2003266877, now seen corresponding path program 16 times [2023-08-30 00:05:44,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:44,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605062442] [2023-08-30 00:05:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:44,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:44,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:44,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605062442] [2023-08-30 00:05:44,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605062442] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:44,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315450179] [2023-08-30 00:05:44,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:05:44,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:44,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:44,785 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:44,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 00:05:44,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:05:44,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:44,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:05:44,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:44,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:44,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315450179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:44,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:44,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-30 00:05:44,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156530142] [2023-08-30 00:05:44,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:44,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 00:05:44,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:44,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 00:05:44,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-08-30 00:05:44,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:44,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 637 transitions, 13470 flow. Second operand has 17 states, 17 states have (on average 66.76470588235294) internal successors, (1135), 17 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:44,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:44,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:44,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:46,413 INFO L130 PetriNetUnfolder]: 1906/3740 cut-off events. [2023-08-30 00:05:46,413 INFO L131 PetriNetUnfolder]: For 113783/113783 co-relation queries the response was YES. [2023-08-30 00:05:46,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33566 conditions, 3740 events. 1906/3740 cut-off events. For 113783/113783 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 27259 event pairs, 212 based on Foata normal form. 6/3746 useless extension candidates. Maximal degree in co-relation 33474. Up to 1224 conditions per place. [2023-08-30 00:05:46,450 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 395 selfloop transitions, 329 changer transitions 11/735 dead transitions. [2023-08-30 00:05:46,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 735 transitions, 16108 flow [2023-08-30 00:05:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 00:05:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 00:05:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1811 transitions. [2023-08-30 00:05:46,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43533653846153847 [2023-08-30 00:05:46,453 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1811 transitions. [2023-08-30 00:05:46,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1811 transitions. [2023-08-30 00:05:46,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:46,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1811 transitions. [2023-08-30 00:05:46,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 69.65384615384616) internal successors, (1811), 26 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:46,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 160.0) internal successors, (4320), 27 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:46,460 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 160.0) internal successors, (4320), 27 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:46,460 INFO L175 Difference]: Start difference. First operand has 253 places, 637 transitions, 13470 flow. Second operand 26 states and 1811 transitions. [2023-08-30 00:05:46,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 735 transitions, 16108 flow [2023-08-30 00:05:47,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 735 transitions, 14845 flow, removed 627 selfloop flow, removed 3 redundant places. [2023-08-30 00:05:47,297 INFO L231 Difference]: Finished difference. Result has 279 places, 670 transitions, 13676 flow [2023-08-30 00:05:47,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=12443, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13676, PETRI_PLACES=279, PETRI_TRANSITIONS=670} [2023-08-30 00:05:47,298 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 250 predicate places. [2023-08-30 00:05:47,299 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 670 transitions, 13676 flow [2023-08-30 00:05:47,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 66.76470588235294) internal successors, (1135), 17 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:47,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:47,299 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:47,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:47,505 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 [2023-08-30 00:05:47,506 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:47,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:47,506 INFO L85 PathProgramCache]: Analyzing trace with hash -182673958, now seen corresponding path program 17 times [2023-08-30 00:05:47,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:47,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61207564] [2023-08-30 00:05:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:47,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:05:47,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:47,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61207564] [2023-08-30 00:05:47,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61207564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:47,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973792310] [2023-08-30 00:05:47,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:05:47,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:47,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:47,630 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:47,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 00:05:47,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:05:47,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:47,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:05:47,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:05:47,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:05:47,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973792310] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:47,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:47,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-08-30 00:05:47,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907246717] [2023-08-30 00:05:47,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:47,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:05:47,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:47,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:05:47,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:05:47,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 160 [2023-08-30 00:05:47,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 670 transitions, 13676 flow. Second operand has 6 states, 6 states have (on average 76.83333333333333) internal successors, (461), 6 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:47,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:47,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 160 [2023-08-30 00:05:47,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:49,723 INFO L130 PetriNetUnfolder]: 2836/5514 cut-off events. [2023-08-30 00:05:49,723 INFO L131 PetriNetUnfolder]: For 152567/152577 co-relation queries the response was YES. [2023-08-30 00:05:49,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48664 conditions, 5514 events. 2836/5514 cut-off events. For 152567/152577 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 43032 event pairs, 223 based on Foata normal form. 35/5547 useless extension candidates. Maximal degree in co-relation 48567. Up to 2893 conditions per place. [2023-08-30 00:05:49,900 INFO L137 encePairwiseOnDemand]: 156/160 looper letters, 606 selfloop transitions, 362 changer transitions 122/1098 dead transitions. [2023-08-30 00:05:49,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 1098 transitions, 23773 flow [2023-08-30 00:05:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:05:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:05:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 501 transitions. [2023-08-30 00:05:49,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2023-08-30 00:05:49,902 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 501 transitions. [2023-08-30 00:05:49,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 501 transitions. [2023-08-30 00:05:49,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:49,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 501 transitions. [2023-08-30 00:05:49,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:49,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:49,905 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:49,905 INFO L175 Difference]: Start difference. First operand has 279 places, 670 transitions, 13676 flow. Second operand 6 states and 501 transitions. [2023-08-30 00:05:49,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 1098 transitions, 23773 flow [2023-08-30 00:05:51,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1098 transitions, 23229 flow, removed 222 selfloop flow, removed 8 redundant places. [2023-08-30 00:05:51,208 INFO L231 Difference]: Finished difference. Result has 279 places, 894 transitions, 19650 flow [2023-08-30 00:05:51,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=13397, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=19650, PETRI_PLACES=279, PETRI_TRANSITIONS=894} [2023-08-30 00:05:51,210 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 250 predicate places. [2023-08-30 00:05:51,210 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 894 transitions, 19650 flow [2023-08-30 00:05:51,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.83333333333333) internal successors, (461), 6 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:51,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:51,210 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:51,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:51,412 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 [2023-08-30 00:05:51,412 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:51,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:51,413 INFO L85 PathProgramCache]: Analyzing trace with hash -326188162, now seen corresponding path program 18 times [2023-08-30 00:05:51,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:51,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607088287] [2023-08-30 00:05:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:51,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:51,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:51,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607088287] [2023-08-30 00:05:51,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607088287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:51,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664530775] [2023-08-30 00:05:51,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:05:51,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:51,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:51,521 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:51,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 00:05:51,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 00:05:51,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:05:51,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:05:51,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:51,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:51,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664530775] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:51,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:51,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-08-30 00:05:51,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792389110] [2023-08-30 00:05:51,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:51,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 00:05:51,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:51,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 00:05:51,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-08-30 00:05:51,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:51,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 894 transitions, 19650 flow. Second operand has 17 states, 17 states have (on average 66.70588235294117) internal successors, (1134), 17 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) [2023-08-30 00:05:51,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:51,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:51,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:54,030 INFO L130 PetriNetUnfolder]: 3201/6269 cut-off events. [2023-08-30 00:05:54,031 INFO L131 PetriNetUnfolder]: For 200231/200231 co-relation queries the response was YES. [2023-08-30 00:05:54,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59168 conditions, 6269 events. 3201/6269 cut-off events. For 200231/200231 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 50045 event pairs, 245 based on Foata normal form. 40/6309 useless extension candidates. Maximal degree in co-relation 59067. Up to 4851 conditions per place. [2023-08-30 00:05:54,125 INFO L137 encePairwiseOnDemand]: 155/160 looper letters, 921 selfloop transitions, 221 changer transitions 51/1193 dead transitions. [2023-08-30 00:05:54,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 1193 transitions, 28293 flow [2023-08-30 00:05:54,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 00:05:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 00:05:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 792 transitions. [2023-08-30 00:05:54,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-08-30 00:05:54,128 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 792 transitions. [2023-08-30 00:05:54,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 792 transitions. [2023-08-30 00:05:54,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:54,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 792 transitions. [2023-08-30 00:05:54,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 72.0) internal successors, (792), 11 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:54,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:54,131 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:54,131 INFO L175 Difference]: Start difference. First operand has 279 places, 894 transitions, 19650 flow. Second operand 11 states and 792 transitions. [2023-08-30 00:05:54,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 1193 transitions, 28293 flow [2023-08-30 00:05:55,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 1193 transitions, 27769 flow, removed 262 selfloop flow, removed 0 redundant places. [2023-08-30 00:05:55,908 INFO L231 Difference]: Finished difference. Result has 295 places, 1048 transitions, 24336 flow [2023-08-30 00:05:55,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=19186, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=24336, PETRI_PLACES=295, PETRI_TRANSITIONS=1048} [2023-08-30 00:05:55,910 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 266 predicate places. [2023-08-30 00:05:55,910 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 1048 transitions, 24336 flow [2023-08-30 00:05:55,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 66.70588235294117) internal successors, (1134), 17 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) [2023-08-30 00:05:55,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:05:55,912 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:05:55,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 00:05:56,118 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 [2023-08-30 00:05:56,119 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:05:56,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:05:56,119 INFO L85 PathProgramCache]: Analyzing trace with hash 35311922, now seen corresponding path program 19 times [2023-08-30 00:05:56,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:05:56,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585406347] [2023-08-30 00:05:56,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:05:56,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:05:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:56,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:05:56,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585406347] [2023-08-30 00:05:56,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585406347] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:05:56,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839241113] [2023-08-30 00:05:56,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:05:56,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:05:56,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:05:56,233 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:05:56,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 00:05:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:05:56,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:05:56,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:05:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:56,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:05:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:05:56,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839241113] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:05:56,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:05:56,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-08-30 00:05:56,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466674489] [2023-08-30 00:05:56,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:05:56,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 00:05:56,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:05:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 00:05:56,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-08-30 00:05:56,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:05:56,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 1048 transitions, 24336 flow. Second operand has 19 states, 19 states have (on average 66.63157894736842) internal successors, (1266), 19 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:56,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:05:56,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:05:56,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:05:59,527 INFO L130 PetriNetUnfolder]: 3553/6923 cut-off events. [2023-08-30 00:05:59,527 INFO L131 PetriNetUnfolder]: For 236573/236573 co-relation queries the response was YES. [2023-08-30 00:05:59,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66507 conditions, 6923 events. 3553/6923 cut-off events. For 236573/236573 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 55686 event pairs, 247 based on Foata normal form. 60/6983 useless extension candidates. Maximal degree in co-relation 66399. Up to 5236 conditions per place. [2023-08-30 00:05:59,607 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 961 selfloop transitions, 303 changer transitions 17/1281 dead transitions. [2023-08-30 00:05:59,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1281 transitions, 31252 flow [2023-08-30 00:05:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 00:05:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 00:05:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1212 transitions. [2023-08-30 00:05:59,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4455882352941177 [2023-08-30 00:05:59,609 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1212 transitions. [2023-08-30 00:05:59,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1212 transitions. [2023-08-30 00:05:59,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:05:59,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1212 transitions. [2023-08-30 00:05:59,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 71.29411764705883) internal successors, (1212), 17 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:59,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 160.0) internal successors, (2880), 18 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:59,614 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 160.0) internal successors, (2880), 18 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:05:59,614 INFO L175 Difference]: Start difference. First operand has 295 places, 1048 transitions, 24336 flow. Second operand 17 states and 1212 transitions. [2023-08-30 00:05:59,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1281 transitions, 31252 flow [2023-08-30 00:06:02,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 1281 transitions, 31023 flow, removed 86 selfloop flow, removed 5 redundant places. [2023-08-30 00:06:02,045 INFO L231 Difference]: Finished difference. Result has 312 places, 1148 transitions, 27748 flow [2023-08-30 00:06:02,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=24167, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1048, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=27748, PETRI_PLACES=312, PETRI_TRANSITIONS=1148} [2023-08-30 00:06:02,046 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 283 predicate places. [2023-08-30 00:06:02,046 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 1148 transitions, 27748 flow [2023-08-30 00:06:02,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 66.63157894736842) internal successors, (1266), 19 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:02,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:06:02,047 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:06:02,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 00:06:02,247 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 [2023-08-30 00:06:02,247 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:06:02,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:06:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1037126212, now seen corresponding path program 20 times [2023-08-30 00:06:02,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:06:02,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388149294] [2023-08-30 00:06:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:06:02,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:06:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:06:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:02,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:06:02,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388149294] [2023-08-30 00:06:02,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388149294] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:06:02,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093074028] [2023-08-30 00:06:02,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:06:02,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:02,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:06:02,354 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:06:02,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 00:06:02,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:06:02,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:06:02,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:06:02,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:06:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:02,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:06:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:02,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093074028] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:06:02,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:06:02,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-30 00:06:02,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538190311] [2023-08-30 00:06:02,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:06:02,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:06:02,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:06:02,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:06:02,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:06:02,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:06:02,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 1148 transitions, 27748 flow. Second operand has 18 states, 18 states have (on average 66.66666666666667) internal successors, (1200), 18 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:02,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:06:02,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:06:02,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:06:06,561 INFO L130 PetriNetUnfolder]: 4006/7871 cut-off events. [2023-08-30 00:06:06,561 INFO L131 PetriNetUnfolder]: For 321357/321357 co-relation queries the response was YES. [2023-08-30 00:06:06,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79018 conditions, 7871 events. 4006/7871 cut-off events. For 321357/321357 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 65444 event pairs, 119 based on Foata normal form. 104/7975 useless extension candidates. Maximal degree in co-relation 78905. Up to 2186 conditions per place. [2023-08-30 00:06:06,659 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 465 selfloop transitions, 973 changer transitions 42/1480 dead transitions. [2023-08-30 00:06:06,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1480 transitions, 36626 flow [2023-08-30 00:06:06,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 00:06:06,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 00:06:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2501 transitions. [2023-08-30 00:06:06,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44660714285714287 [2023-08-30 00:06:06,663 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2501 transitions. [2023-08-30 00:06:06,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2501 transitions. [2023-08-30 00:06:06,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:06:06,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2501 transitions. [2023-08-30 00:06:06,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 71.45714285714286) internal successors, (2501), 35 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:06,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 160.0) internal successors, (5760), 36 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:06,670 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 160.0) internal successors, (5760), 36 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:06,670 INFO L175 Difference]: Start difference. First operand has 312 places, 1148 transitions, 27748 flow. Second operand 35 states and 2501 transitions. [2023-08-30 00:06:06,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1480 transitions, 36626 flow [2023-08-30 00:06:09,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1480 transitions, 36122 flow, removed 226 selfloop flow, removed 5 redundant places. [2023-08-30 00:06:09,974 INFO L231 Difference]: Finished difference. Result has 351 places, 1277 transitions, 34045 flow [2023-08-30 00:06:09,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=27338, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=856, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=34045, PETRI_PLACES=351, PETRI_TRANSITIONS=1277} [2023-08-30 00:06:09,976 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 322 predicate places. [2023-08-30 00:06:09,976 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1277 transitions, 34045 flow [2023-08-30 00:06:09,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 66.66666666666667) internal successors, (1200), 18 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:09,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:06:09,979 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:06:09,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 00:06:10,184 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 [2023-08-30 00:06:10,184 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:06:10,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:06:10,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1896595388, now seen corresponding path program 21 times [2023-08-30 00:06:10,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:06:10,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408234904] [2023-08-30 00:06:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:06:10,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:06:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:06:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:10,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:06:10,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408234904] [2023-08-30 00:06:10,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408234904] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:06:10,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420359440] [2023-08-30 00:06:10,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:06:10,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:10,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:06:10,290 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:06:10,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 00:06:10,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 00:06:10,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:06:10,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:06:10,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:06:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:10,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:06:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:10,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420359440] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:06:10,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:06:10,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-30 00:06:10,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882448132] [2023-08-30 00:06:10,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:06:10,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:06:10,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:06:10,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:06:10,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:06:10,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:06:10,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1277 transitions, 34045 flow. Second operand has 18 states, 18 states have (on average 66.66666666666667) internal successors, (1200), 18 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:10,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:06:10,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:06:10,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:06:14,908 INFO L130 PetriNetUnfolder]: 3973/7770 cut-off events. [2023-08-30 00:06:14,908 INFO L131 PetriNetUnfolder]: For 352832/352832 co-relation queries the response was YES. [2023-08-30 00:06:14,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83662 conditions, 7770 events. 3973/7770 cut-off events. For 352832/352832 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 64172 event pairs, 55 based on Foata normal form. 16/7786 useless extension candidates. Maximal degree in co-relation 83539. Up to 2194 conditions per place. [2023-08-30 00:06:15,011 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 311 selfloop transitions, 1114 changer transitions 45/1470 dead transitions. [2023-08-30 00:06:15,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1470 transitions, 39435 flow [2023-08-30 00:06:15,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 00:06:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 00:06:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3207 transitions. [2023-08-30 00:06:15,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357336956521739 [2023-08-30 00:06:15,015 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3207 transitions. [2023-08-30 00:06:15,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3207 transitions. [2023-08-30 00:06:15,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:06:15,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3207 transitions. [2023-08-30 00:06:15,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 69.71739130434783) internal successors, (3207), 46 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:15,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 160.0) internal successors, (7520), 47 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:15,038 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 160.0) internal successors, (7520), 47 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:15,038 INFO L175 Difference]: Start difference. First operand has 351 places, 1277 transitions, 34045 flow. Second operand 46 states and 3207 transitions. [2023-08-30 00:06:15,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1470 transitions, 39435 flow [2023-08-30 00:06:18,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1470 transitions, 36683 flow, removed 930 selfloop flow, removed 20 redundant places. [2023-08-30 00:06:18,869 INFO L231 Difference]: Finished difference. Result has 377 places, 1323 transitions, 34582 flow [2023-08-30 00:06:18,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=31305, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1072, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=34582, PETRI_PLACES=377, PETRI_TRANSITIONS=1323} [2023-08-30 00:06:18,871 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 348 predicate places. [2023-08-30 00:06:18,871 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 1323 transitions, 34582 flow [2023-08-30 00:06:18,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 66.66666666666667) internal successors, (1200), 18 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:18,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:06:18,872 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:06:18,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 00:06:19,078 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 [2023-08-30 00:06:19,078 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:06:19,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:06:19,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2015461100, now seen corresponding path program 22 times [2023-08-30 00:06:19,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:06:19,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259001217] [2023-08-30 00:06:19,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:06:19,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:06:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:06:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:19,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:06:19,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259001217] [2023-08-30 00:06:19,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259001217] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:06:19,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623783484] [2023-08-30 00:06:19,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:06:19,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:19,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:06:19,181 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:06:19,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 00:06:19,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:06:19,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:06:19,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:06:19,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:06:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:19,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:06:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:19,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623783484] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:06:19,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:06:19,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2023-08-30 00:06:19,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250588509] [2023-08-30 00:06:19,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:06:19,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:06:19,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:06:19,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:06:19,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:06:19,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:06:19,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1323 transitions, 34582 flow. Second operand has 18 states, 18 states have (on average 66.88888888888889) internal successors, (1204), 18 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:19,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:06:19,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:06:19,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:06:23,815 INFO L130 PetriNetUnfolder]: 4482/8635 cut-off events. [2023-08-30 00:06:23,815 INFO L131 PetriNetUnfolder]: For 413302/413302 co-relation queries the response was YES. [2023-08-30 00:06:23,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92034 conditions, 8635 events. 4482/8635 cut-off events. For 413302/413302 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 71963 event pairs, 113 based on Foata normal form. 238/8873 useless extension candidates. Maximal degree in co-relation 91916. Up to 2506 conditions per place. [2023-08-30 00:06:23,932 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 559 selfloop transitions, 1088 changer transitions 27/1674 dead transitions. [2023-08-30 00:06:23,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1674 transitions, 45643 flow [2023-08-30 00:06:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 00:06:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 00:06:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1909 transitions. [2023-08-30 00:06:23,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44189814814814815 [2023-08-30 00:06:23,934 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1909 transitions. [2023-08-30 00:06:23,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1909 transitions. [2023-08-30 00:06:23,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:06:23,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1909 transitions. [2023-08-30 00:06:23,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 70.70370370370371) internal successors, (1909), 27 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:23,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 160.0) internal successors, (4480), 28 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:23,938 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 160.0) internal successors, (4480), 28 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:23,938 INFO L175 Difference]: Start difference. First operand has 377 places, 1323 transitions, 34582 flow. Second operand 27 states and 1909 transitions. [2023-08-30 00:06:23,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1674 transitions, 45643 flow [2023-08-30 00:06:29,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1674 transitions, 42995 flow, removed 815 selfloop flow, removed 17 redundant places. [2023-08-30 00:06:29,062 INFO L231 Difference]: Finished difference. Result has 386 places, 1503 transitions, 41124 flow [2023-08-30 00:06:29,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=32753, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=903, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=41124, PETRI_PLACES=386, PETRI_TRANSITIONS=1503} [2023-08-30 00:06:29,064 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 357 predicate places. [2023-08-30 00:06:29,064 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1503 transitions, 41124 flow [2023-08-30 00:06:29,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 66.88888888888889) internal successors, (1204), 18 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:29,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:06:29,064 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:06:29,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 00:06:29,265 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 [2023-08-30 00:06:29,265 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:06:29,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:06:29,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1715099570, now seen corresponding path program 23 times [2023-08-30 00:06:29,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:06:29,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800541372] [2023-08-30 00:06:29,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:06:29,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:06:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:06:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:29,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:06:29,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800541372] [2023-08-30 00:06:29,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800541372] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:06:29,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164753956] [2023-08-30 00:06:29,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:06:29,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:29,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:06:29,373 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:06:29,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 00:06:29,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:06:29,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:06:29,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:06:29,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:06:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:29,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:06:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:29,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164753956] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:06:29,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:06:29,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2023-08-30 00:06:29,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368358030] [2023-08-30 00:06:29,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:06:29,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 00:06:29,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:06:29,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 00:06:29,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-08-30 00:06:29,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:06:29,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1503 transitions, 41124 flow. Second operand has 19 states, 19 states have (on average 66.84210526315789) internal successors, (1270), 19 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:29,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:06:29,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:06:29,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:06:36,554 INFO L130 PetriNetUnfolder]: 6506/12382 cut-off events. [2023-08-30 00:06:36,554 INFO L131 PetriNetUnfolder]: For 539831/539831 co-relation queries the response was YES. [2023-08-30 00:06:36,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136460 conditions, 12382 events. 6506/12382 cut-off events. For 539831/539831 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 107294 event pairs, 185 based on Foata normal form. 182/12564 useless extension candidates. Maximal degree in co-relation 136342. Up to 3734 conditions per place. [2023-08-30 00:06:36,748 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 747 selfloop transitions, 1593 changer transitions 38/2378 dead transitions. [2023-08-30 00:06:36,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 2378 transitions, 68054 flow [2023-08-30 00:06:36,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 00:06:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 00:06:36,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2200 transitions. [2023-08-30 00:06:36,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2023-08-30 00:06:36,750 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2200 transitions. [2023-08-30 00:06:36,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2200 transitions. [2023-08-30 00:06:36,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:06:36,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2200 transitions. [2023-08-30 00:06:36,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 70.96774193548387) internal successors, (2200), 31 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:36,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 160.0) internal successors, (5120), 32 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:36,758 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 160.0) internal successors, (5120), 32 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:36,758 INFO L175 Difference]: Start difference. First operand has 386 places, 1503 transitions, 41124 flow. Second operand 31 states and 2200 transitions. [2023-08-30 00:06:36,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 2378 transitions, 68054 flow [2023-08-30 00:06:44,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 2378 transitions, 66789 flow, removed 517 selfloop flow, removed 12 redundant places. [2023-08-30 00:06:44,572 INFO L231 Difference]: Finished difference. Result has 416 places, 2154 transitions, 64843 flow [2023-08-30 00:06:44,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=40387, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=997, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=64843, PETRI_PLACES=416, PETRI_TRANSITIONS=2154} [2023-08-30 00:06:44,574 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 387 predicate places. [2023-08-30 00:06:44,575 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 2154 transitions, 64843 flow [2023-08-30 00:06:44,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 66.84210526315789) internal successors, (1270), 19 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:44,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:06:44,575 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:06:44,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 00:06:44,781 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 [2023-08-30 00:06:44,781 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:06:44,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:06:44,781 INFO L85 PathProgramCache]: Analyzing trace with hash 349685084, now seen corresponding path program 24 times [2023-08-30 00:06:44,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:06:44,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235672930] [2023-08-30 00:06:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:06:44,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:06:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:06:44,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:44,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:06:44,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235672930] [2023-08-30 00:06:44,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235672930] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:06:44,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762791799] [2023-08-30 00:06:44,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:06:44,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:06:44,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:06:44,889 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:06:44,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 00:06:44,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 00:06:44,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:06:44,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:06:44,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:06:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:45,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:06:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:06:45,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762791799] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:06:45,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:06:45,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2023-08-30 00:06:45,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420896295] [2023-08-30 00:06:45,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:06:45,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:06:45,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:06:45,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:06:45,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:06:45,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:06:45,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 2154 transitions, 64843 flow. Second operand has 21 states, 21 states have (on average 66.66666666666667) internal successors, (1400), 21 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:45,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:06:45,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:06:45,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:06:54,367 INFO L130 PetriNetUnfolder]: 6744/12910 cut-off events. [2023-08-30 00:06:54,367 INFO L131 PetriNetUnfolder]: For 609494/609494 co-relation queries the response was YES. [2023-08-30 00:06:54,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151597 conditions, 12910 events. 6744/12910 cut-off events. For 609494/609494 co-relation queries the response was YES. Maximal size of possible extension queue 1057. Compared 112910 event pairs, 783 based on Foata normal form. 32/12942 useless extension candidates. Maximal degree in co-relation 151468. Up to 4268 conditions per place. [2023-08-30 00:06:54,716 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 1385 selfloop transitions, 1002 changer transitions 13/2400 dead transitions. [2023-08-30 00:06:54,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 2400 transitions, 73903 flow [2023-08-30 00:06:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 00:06:54,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 00:06:54,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2810 transitions. [2023-08-30 00:06:54,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390625 [2023-08-30 00:06:54,721 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2810 transitions. [2023-08-30 00:06:54,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2810 transitions. [2023-08-30 00:06:54,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:06:54,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2810 transitions. [2023-08-30 00:06:54,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 70.25) internal successors, (2810), 40 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:54,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 160.0) internal successors, (6560), 41 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:54,729 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 160.0) internal successors, (6560), 41 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:06:54,729 INFO L175 Difference]: Start difference. First operand has 416 places, 2154 transitions, 64843 flow. Second operand 40 states and 2810 transitions. [2023-08-30 00:06:54,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 2400 transitions, 73903 flow [2023-08-30 00:07:07,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 2400 transitions, 72391 flow, removed 644 selfloop flow, removed 13 redundant places. [2023-08-30 00:07:07,389 INFO L231 Difference]: Finished difference. Result has 448 places, 2279 transitions, 68640 flow [2023-08-30 00:07:07,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=63331, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=893, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=68640, PETRI_PLACES=448, PETRI_TRANSITIONS=2279} [2023-08-30 00:07:07,391 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 419 predicate places. [2023-08-30 00:07:07,391 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 2279 transitions, 68640 flow [2023-08-30 00:07:07,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 66.66666666666667) internal successors, (1400), 21 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:07,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:07:07,392 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:07:07,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 00:07:07,592 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 [2023-08-30 00:07:07,593 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:07:07,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:07:07,593 INFO L85 PathProgramCache]: Analyzing trace with hash -529359662, now seen corresponding path program 25 times [2023-08-30 00:07:07,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:07:07,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469785932] [2023-08-30 00:07:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:07:07,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:07:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:07:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:07,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:07:07,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469785932] [2023-08-30 00:07:07,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469785932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:07:07,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916231950] [2023-08-30 00:07:07,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:07:07,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:07:07,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:07:07,713 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:07:07,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 00:07:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:07:07,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:07:07,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:07:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:07,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:07:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:07:07,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916231950] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:07:07,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:07:07,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2023-08-30 00:07:07,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858506826] [2023-08-30 00:07:07,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:07:07,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:07:07,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:07:07,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:07:07,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:07:08,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:07:08,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 2279 transitions, 68640 flow. Second operand has 21 states, 21 states have (on average 66.80952380952381) internal successors, (1403), 21 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:08,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:07:08,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:07:08,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:07:18,017 INFO L130 PetriNetUnfolder]: 6694/12730 cut-off events. [2023-08-30 00:07:18,017 INFO L131 PetriNetUnfolder]: For 667166/667166 co-relation queries the response was YES. [2023-08-30 00:07:18,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151341 conditions, 12730 events. 6694/12730 cut-off events. For 667166/667166 co-relation queries the response was YES. Maximal size of possible extension queue 1045. Compared 110254 event pairs, 2163 based on Foata normal form. 106/12836 useless extension candidates. Maximal degree in co-relation 151206. Up to 10872 conditions per place. [2023-08-30 00:07:18,229 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 2037 selfloop transitions, 321 changer transitions 20/2378 dead transitions. [2023-08-30 00:07:18,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 2378 transitions, 74172 flow [2023-08-30 00:07:18,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 00:07:18,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 00:07:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1857 transitions. [2023-08-30 00:07:18,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463942307692308 [2023-08-30 00:07:18,232 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1857 transitions. [2023-08-30 00:07:18,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1857 transitions. [2023-08-30 00:07:18,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:07:18,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1857 transitions. [2023-08-30 00:07:18,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 71.42307692307692) internal successors, (1857), 26 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:18,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 160.0) internal successors, (4320), 27 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:18,236 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 160.0) internal successors, (4320), 27 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:18,236 INFO L175 Difference]: Start difference. First operand has 448 places, 2279 transitions, 68640 flow. Second operand 26 states and 1857 transitions. [2023-08-30 00:07:18,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 2378 transitions, 74172 flow [2023-08-30 00:07:28,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 2378 transitions, 71505 flow, removed 671 selfloop flow, removed 15 redundant places. [2023-08-30 00:07:28,700 INFO L231 Difference]: Finished difference. Result has 459 places, 2278 transitions, 66530 flow [2023-08-30 00:07:28,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=65445, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1963, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=66530, PETRI_PLACES=459, PETRI_TRANSITIONS=2278} [2023-08-30 00:07:28,701 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 430 predicate places. [2023-08-30 00:07:28,701 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 2278 transitions, 66530 flow [2023-08-30 00:07:28,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 66.80952380952381) internal successors, (1403), 21 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:28,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:07:28,702 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:07:28,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-30 00:07:28,902 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 [2023-08-30 00:07:28,903 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:07:28,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:07:28,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1269540569, now seen corresponding path program 26 times [2023-08-30 00:07:28,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:07:28,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898339627] [2023-08-30 00:07:28,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:07:28,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:07:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:07:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:07:29,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:07:29,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898339627] [2023-08-30 00:07:29,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898339627] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:07:29,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691584103] [2023-08-30 00:07:29,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:07:29,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:07:29,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:07:29,026 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:07:29,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 00:07:29,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:07:29,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:07:29,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:07:29,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:07:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:07:29,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:07:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:07:29,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691584103] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:07:29,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:07:29,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-08-30 00:07:29,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394044290] [2023-08-30 00:07:29,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:07:29,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 00:07:29,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:07:29,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 00:07:29,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 00:07:29,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 160 [2023-08-30 00:07:29,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 2278 transitions, 66530 flow. Second operand has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:29,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:07:29,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 160 [2023-08-30 00:07:29,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:07:41,085 INFO L130 PetriNetUnfolder]: 9280/17629 cut-off events. [2023-08-30 00:07:41,086 INFO L131 PetriNetUnfolder]: For 862907/862918 co-relation queries the response was YES. [2023-08-30 00:07:41,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206323 conditions, 17629 events. 9280/17629 cut-off events. For 862907/862918 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 160367 event pairs, 620 based on Foata normal form. 40/17663 useless extension candidates. Maximal degree in co-relation 206189. Up to 9136 conditions per place. [2023-08-30 00:07:41,351 INFO L137 encePairwiseOnDemand]: 156/160 looper letters, 1800 selfloop transitions, 1425 changer transitions 140/3374 dead transitions. [2023-08-30 00:07:41,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 3374 transitions, 101280 flow [2023-08-30 00:07:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:07:41,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:07:41,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 586 transitions. [2023-08-30 00:07:41,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232142857142857 [2023-08-30 00:07:41,354 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 586 transitions. [2023-08-30 00:07:41,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 586 transitions. [2023-08-30 00:07:41,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:07:41,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 586 transitions. [2023-08-30 00:07:41,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 83.71428571428571) internal successors, (586), 7 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:41,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 160.0) internal successors, (1280), 8 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:41,356 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 160.0) internal successors, (1280), 8 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:41,356 INFO L175 Difference]: Start difference. First operand has 459 places, 2278 transitions, 66530 flow. Second operand 7 states and 586 transitions. [2023-08-30 00:07:41,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 3374 transitions, 101280 flow [2023-08-30 00:07:56,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 3374 transitions, 100242 flow, removed 277 selfloop flow, removed 14 redundant places. [2023-08-30 00:07:56,270 INFO L231 Difference]: Finished difference. Result has 455 places, 3027 transitions, 93432 flow [2023-08-30 00:07:56,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=65886, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=658, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=862, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=93432, PETRI_PLACES=455, PETRI_TRANSITIONS=3027} [2023-08-30 00:07:56,274 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 426 predicate places. [2023-08-30 00:07:56,274 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 3027 transitions, 93432 flow [2023-08-30 00:07:56,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:56,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:07:56,274 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:07:56,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 00:07:56,475 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 [2023-08-30 00:07:56,475 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:07:56,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:07:56,475 INFO L85 PathProgramCache]: Analyzing trace with hash 642733181, now seen corresponding path program 27 times [2023-08-30 00:07:56,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:07:56,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619028048] [2023-08-30 00:07:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:07:56,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:07:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:07:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:56,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:07:56,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619028048] [2023-08-30 00:07:56,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619028048] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:07:56,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102277760] [2023-08-30 00:07:56,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:07:56,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:07:56,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:07:56,601 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:07:56,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 00:07:56,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 00:07:56,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:07:56,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:07:56,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:07:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:56,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:07:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:07:56,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102277760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:07:56,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:07:56,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-08-30 00:07:56,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662380483] [2023-08-30 00:07:56,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:07:56,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 00:07:56,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:07:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 00:07:56,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-08-30 00:07:56,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:07:56,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 3027 transitions, 93432 flow. Second operand has 20 states, 20 states have (on average 66.75) internal successors, (1335), 20 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:07:56,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:07:56,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:07:56,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:08:16,995 INFO L130 PetriNetUnfolder]: 11009/20878 cut-off events. [2023-08-30 00:08:16,995 INFO L131 PetriNetUnfolder]: For 1086199/1086199 co-relation queries the response was YES. [2023-08-30 00:08:17,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256729 conditions, 20878 events. 11009/20878 cut-off events. For 1086199/1086199 co-relation queries the response was YES. Maximal size of possible extension queue 1606. Compared 193740 event pairs, 891 based on Foata normal form. 84/20960 useless extension candidates. Maximal degree in co-relation 256591. Up to 16861 conditions per place. [2023-08-30 00:08:17,454 INFO L137 encePairwiseOnDemand]: 155/160 looper letters, 3111 selfloop transitions, 669 changer transitions 75/3855 dead transitions. [2023-08-30 00:08:17,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 3855 transitions, 125726 flow [2023-08-30 00:08:17,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 00:08:17,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 00:08:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 934 transitions. [2023-08-30 00:08:17,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44903846153846155 [2023-08-30 00:08:17,456 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 934 transitions. [2023-08-30 00:08:17,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 934 transitions. [2023-08-30 00:08:17,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:08:17,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 934 transitions. [2023-08-30 00:08:17,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 71.84615384615384) internal successors, (934), 13 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:17,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 160.0) internal successors, (2240), 14 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:17,459 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 160.0) internal successors, (2240), 14 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:17,459 INFO L175 Difference]: Start difference. First operand has 455 places, 3027 transitions, 93432 flow. Second operand 13 states and 934 transitions. [2023-08-30 00:08:17,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 3855 transitions, 125726 flow [2023-08-30 00:08:40,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 3855 transitions, 124088 flow, removed 791 selfloop flow, removed 1 redundant places. [2023-08-30 00:08:40,451 INFO L231 Difference]: Finished difference. Result has 473 places, 3545 transitions, 113318 flow [2023-08-30 00:08:40,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=91827, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=113318, PETRI_PLACES=473, PETRI_TRANSITIONS=3545} [2023-08-30 00:08:40,454 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 444 predicate places. [2023-08-30 00:08:40,454 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 3545 transitions, 113318 flow [2023-08-30 00:08:40,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.75) internal successors, (1335), 20 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:40,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:08:40,455 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:08:40,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 00:08:40,655 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 [2023-08-30 00:08:40,655 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)] === [2023-08-30 00:08:40,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:08:40,656 INFO L85 PathProgramCache]: Analyzing trace with hash -743847145, now seen corresponding path program 28 times [2023-08-30 00:08:40,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:08:40,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585990248] [2023-08-30 00:08:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:08:40,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:08:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:08:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:08:40,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:08:40,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585990248] [2023-08-30 00:08:40,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585990248] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:08:40,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414795019] [2023-08-30 00:08:40,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:08:40,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:08:40,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:08:40,785 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:08:40,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 00:08:40,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:08:40,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:08:40,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:08:40,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:08:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:08:40,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:08:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:08:41,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414795019] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:08:41,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:08:41,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2023-08-30 00:08:41,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466873877] [2023-08-30 00:08:41,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:08:41,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:08:41,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:08:41,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:08:41,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-08-30 00:08:41,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:08:41,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 3545 transitions, 113318 flow. Second operand has 22 states, 22 states have (on average 66.54545454545455) internal successors, (1464), 22 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:08:41,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:08:41,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:08:41,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:09:08,193 INFO L130 PetriNetUnfolder]: 11960/22645 cut-off events. [2023-08-30 00:09:08,194 INFO L131 PetriNetUnfolder]: For 1222142/1222142 co-relation queries the response was YES. [2023-08-30 00:09:08,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281480 conditions, 22645 events. 11960/22645 cut-off events. For 1222142/1222142 co-relation queries the response was YES. Maximal size of possible extension queue 1654. Compared 211154 event pairs, 923 based on Foata normal form. 108/22751 useless extension candidates. Maximal degree in co-relation 281335. Up to 17690 conditions per place. [2023-08-30 00:09:08,719 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 3184 selfloop transitions, 875 changer transitions 21/4080 dead transitions. [2023-08-30 00:09:08,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 4080 transitions, 135613 flow [2023-08-30 00:09:08,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 00:09:08,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 00:09:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1425 transitions. [2023-08-30 00:09:08,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453125 [2023-08-30 00:09:08,721 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1425 transitions. [2023-08-30 00:09:08,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1425 transitions. [2023-08-30 00:09:08,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:09:08,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1425 transitions. [2023-08-30 00:09:08,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 71.25) internal successors, (1425), 20 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:08,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 160.0) internal successors, (3360), 21 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:08,723 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 160.0) internal successors, (3360), 21 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:08,723 INFO L175 Difference]: Start difference. First operand has 473 places, 3545 transitions, 113318 flow. Second operand 20 states and 1425 transitions. [2023-08-30 00:09:08,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 4080 transitions, 135613 flow [2023-08-30 00:09:37,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 4080 transitions, 135189 flow, removed 193 selfloop flow, removed 4 redundant places. [2023-08-30 00:09:37,879 INFO L231 Difference]: Finished difference. Result has 494 places, 3805 transitions, 124619 flow [2023-08-30 00:09:37,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=112996, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=665, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=124619, PETRI_PLACES=494, PETRI_TRANSITIONS=3805} [2023-08-30 00:09:37,882 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 465 predicate places. [2023-08-30 00:09:37,882 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 3805 transitions, 124619 flow [2023-08-30 00:09:37,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 66.54545454545455) internal successors, (1464), 22 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:37,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:09:37,883 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:09:37,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-30 00:09:38,083 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 [2023-08-30 00:09:38,084 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)] === [2023-08-30 00:09:38,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:09:38,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1939804055, now seen corresponding path program 29 times [2023-08-30 00:09:38,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:09:38,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92206227] [2023-08-30 00:09:38,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:09:38,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:09:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:09:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:09:38,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:09:38,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92206227] [2023-08-30 00:09:38,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92206227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:09:38,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202678337] [2023-08-30 00:09:38,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:09:38,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:09:38,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:09:38,233 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:09:38,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 00:09:38,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-30 00:09:38,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:09:38,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:09:38,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:09:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:09:38,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:09:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:09:38,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202678337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:09:38,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:09:38,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2023-08-30 00:09:38,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875707327] [2023-08-30 00:09:38,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:09:38,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:09:38,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:09:38,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:09:38,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:09:38,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:09:38,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 3805 transitions, 124619 flow. Second operand has 21 states, 21 states have (on average 66.57142857142857) internal successors, (1398), 21 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:38,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:09:38,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:09:38,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:10:10,064 INFO L130 PetriNetUnfolder]: 12724/24200 cut-off events. [2023-08-30 00:10:10,065 INFO L131 PetriNetUnfolder]: For 1479375/1479375 co-relation queries the response was YES. [2023-08-30 00:10:10,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305792 conditions, 24200 events. 12724/24200 cut-off events. For 1479375/1479375 co-relation queries the response was YES. Maximal size of possible extension queue 1738. Compared 229301 event pairs, 295 based on Foata normal form. 170/24368 useless extension candidates. Maximal degree in co-relation 305641. Up to 7420 conditions per place. [2023-08-30 00:10:10,762 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 965 selfloop transitions, 3387 changer transitions 64/4416 dead transitions. [2023-08-30 00:10:10,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 4416 transitions, 146676 flow [2023-08-30 00:10:10,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 00:10:10,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 00:10:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3627 transitions. [2023-08-30 00:10:10,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44448529411764703 [2023-08-30 00:10:10,767 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3627 transitions. [2023-08-30 00:10:10,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3627 transitions. [2023-08-30 00:10:10,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:10:10,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3627 transitions. [2023-08-30 00:10:10,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 71.11764705882354) internal successors, (3627), 51 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:10,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 160.0) internal successors, (8320), 52 states have internal predecessors, (8320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:10,778 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 160.0) internal successors, (8320), 52 states have internal predecessors, (8320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:10,778 INFO L175 Difference]: Start difference. First operand has 494 places, 3805 transitions, 124619 flow. Second operand 51 states and 3627 transitions. [2023-08-30 00:10:10,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 4416 transitions, 146676 flow [2023-08-30 00:10:45,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 4416 transitions, 145662 flow, removed 479 selfloop flow, removed 5 redundant places. [2023-08-30 00:10:45,954 INFO L231 Difference]: Finished difference. Result has 553 places, 4071 transitions, 143409 flow [2023-08-30 00:10:45,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=123727, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=143409, PETRI_PLACES=553, PETRI_TRANSITIONS=4071} [2023-08-30 00:10:45,958 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 524 predicate places. [2023-08-30 00:10:45,958 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 4071 transitions, 143409 flow [2023-08-30 00:10:45,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 66.57142857142857) internal successors, (1398), 21 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:45,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:10:45,959 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:10:45,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 00:10:46,164 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 [2023-08-30 00:10:46,165 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)] === [2023-08-30 00:10:46,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:10:46,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1495694065, now seen corresponding path program 30 times [2023-08-30 00:10:46,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:10:46,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336254575] [2023-08-30 00:10:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:10:46,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:10:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:10:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:46,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:10:46,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336254575] [2023-08-30 00:10:46,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336254575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:10:46,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219586489] [2023-08-30 00:10:46,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:10:46,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:10:46,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:10:46,281 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) [2023-08-30 00:10:46,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 00:10:46,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 00:10:46,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:10:46,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:10:46,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:10:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:46,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:10:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:46,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219586489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:10:46,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:10:46,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2023-08-30 00:10:46,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247056318] [2023-08-30 00:10:46,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:10:46,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:10:46,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:10:46,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:10:46,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:10:46,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:10:46,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 4071 transitions, 143409 flow. Second operand has 21 states, 21 states have (on average 66.57142857142857) internal successors, (1398), 21 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:46,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:10:46,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:10:46,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:11:21,648 INFO L130 PetriNetUnfolder]: 12675/24059 cut-off events. [2023-08-30 00:11:21,648 INFO L131 PetriNetUnfolder]: For 1632029/1632029 co-relation queries the response was YES. [2023-08-30 00:11:22,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324486 conditions, 24059 events. 12675/24059 cut-off events. For 1632029/1632029 co-relation queries the response was YES. Maximal size of possible extension queue 1735. Compared 227240 event pairs, 141 based on Foata normal form. 20/24077 useless extension candidates. Maximal degree in co-relation 324321. Up to 7424 conditions per place. [2023-08-30 00:11:22,291 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 595 selfloop transitions, 3733 changer transitions 64/4392 dead transitions. [2023-08-30 00:11:22,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 4392 transitions, 157370 flow [2023-08-30 00:11:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-30 00:11:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-30 00:11:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4452 transitions. [2023-08-30 00:11:22,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434765625 [2023-08-30 00:11:22,295 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4452 transitions. [2023-08-30 00:11:22,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4452 transitions. [2023-08-30 00:11:22,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:11:22,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4452 transitions. [2023-08-30 00:11:22,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 69.5625) internal successors, (4452), 64 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:22,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 160.0) internal successors, (10400), 65 states have internal predecessors, (10400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:22,308 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 160.0) internal successors, (10400), 65 states have internal predecessors, (10400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:22,308 INFO L175 Difference]: Start difference. First operand has 553 places, 4071 transitions, 143409 flow. Second operand 64 states and 4452 transitions. [2023-08-30 00:11:22,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 4392 transitions, 157370 flow [2023-08-30 00:12:06,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 4392 transitions, 150570 flow, removed 2179 selfloop flow, removed 27 redundant places. [2023-08-30 00:12:06,930 INFO L231 Difference]: Finished difference. Result has 590 places, 4172 transitions, 146440 flow [2023-08-30 00:12:06,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=136649, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3637, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=146440, PETRI_PLACES=590, PETRI_TRANSITIONS=4172} [2023-08-30 00:12:06,934 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 561 predicate places. [2023-08-30 00:12:06,934 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 4172 transitions, 146440 flow [2023-08-30 00:12:06,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 66.57142857142857) internal successors, (1398), 21 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:06,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:12:06,934 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:12:06,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-08-30 00:12:07,135 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 [2023-08-30 00:12:07,135 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)] === [2023-08-30 00:12:07,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:12:07,135 INFO L85 PathProgramCache]: Analyzing trace with hash 334615609, now seen corresponding path program 31 times [2023-08-30 00:12:07,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:12:07,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403265465] [2023-08-30 00:12:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:12:07,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:12:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:12:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:12:07,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:12:07,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403265465] [2023-08-30 00:12:07,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403265465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:12:07,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516858604] [2023-08-30 00:12:07,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:12:07,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:12:07,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:12:07,249 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) [2023-08-30 00:12:07,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 00:12:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:12:07,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:12:07,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:12:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:12:07,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:12:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:12:07,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516858604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:12:07,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:12:07,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 20 [2023-08-30 00:12:07,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199351098] [2023-08-30 00:12:07,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:12:07,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 00:12:07,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:12:07,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 00:12:07,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2023-08-30 00:12:07,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:12:07,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 4172 transitions, 146440 flow. Second operand has 20 states, 20 states have (on average 66.8) internal successors, (1336), 20 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:07,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:12:07,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:12:07,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:12:48,015 INFO L130 PetriNetUnfolder]: 14706/27773 cut-off events. [2023-08-30 00:12:48,016 INFO L131 PetriNetUnfolder]: For 2002112/2002112 co-relation queries the response was YES. [2023-08-30 00:12:48,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379767 conditions, 27773 events. 14706/27773 cut-off events. For 2002112/2002112 co-relation queries the response was YES. Maximal size of possible extension queue 2054. Compared 267197 event pairs, 559 based on Foata normal form. 216/27987 useless extension candidates. Maximal degree in co-relation 379606. Up to 10387 conditions per place. [2023-08-30 00:12:48,865 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 2063 selfloop transitions, 3052 changer transitions 42/5157 dead transitions. [2023-08-30 00:12:48,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 5157 transitions, 186933 flow [2023-08-30 00:12:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 00:12:48,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 00:12:48,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2547 transitions. [2023-08-30 00:12:48,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421875 [2023-08-30 00:12:48,869 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2547 transitions. [2023-08-30 00:12:48,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2547 transitions. [2023-08-30 00:12:48,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:12:48,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2547 transitions. [2023-08-30 00:12:48,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 70.75) internal successors, (2547), 36 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:48,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 160.0) internal successors, (5920), 37 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:48,875 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 160.0) internal successors, (5920), 37 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:48,876 INFO L175 Difference]: Start difference. First operand has 590 places, 4172 transitions, 146440 flow. Second operand 36 states and 2547 transitions. [2023-08-30 00:12:48,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 5157 transitions, 186933 flow [2023-08-30 00:13:45,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 5157 transitions, 183040 flow, removed 1090 selfloop flow, removed 26 redundant places. [2023-08-30 00:13:45,961 INFO L231 Difference]: Finished difference. Result has 601 places, 4829 transitions, 176699 flow [2023-08-30 00:13:45,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=143212, PETRI_DIFFERENCE_MINUEND_PLACES=558, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2493, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=176699, PETRI_PLACES=601, PETRI_TRANSITIONS=4829} [2023-08-30 00:13:45,965 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 572 predicate places. [2023-08-30 00:13:45,965 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 4829 transitions, 176699 flow [2023-08-30 00:13:45,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.8) internal successors, (1336), 20 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:45,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:45,965 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:13:45,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 00:13:46,166 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 [2023-08-30 00:13:46,166 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)] === [2023-08-30 00:13:46,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:46,166 INFO L85 PathProgramCache]: Analyzing trace with hash 408137337, now seen corresponding path program 32 times [2023-08-30 00:13:46,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:13:46,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621308800] [2023-08-30 00:13:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:13:46,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:13:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:13:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:46,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:13:46,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621308800] [2023-08-30 00:13:46,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621308800] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:13:46,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290491933] [2023-08-30 00:13:46,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:13:46,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:13:46,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:13:46,279 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) [2023-08-30 00:13:46,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 00:13:46,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:13:46,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:13:46,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:13:46,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:46,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:13:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:46,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290491933] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:13:46,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:13:46,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 21 [2023-08-30 00:13:46,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330591663] [2023-08-30 00:13:46,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:13:46,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:13:46,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:13:46,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:13:46,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:13:46,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:13:46,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 4829 transitions, 176699 flow. Second operand has 21 states, 21 states have (on average 66.76190476190476) internal successors, (1402), 21 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:46,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:46,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:13:46,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:14:35,422 INFO L130 PetriNetUnfolder]: 15273/28968 cut-off events. [2023-08-30 00:14:35,422 INFO L131 PetriNetUnfolder]: For 2422109/2422109 co-relation queries the response was YES. [2023-08-30 00:14:36,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403846 conditions, 28968 events. 15273/28968 cut-off events. For 2422109/2422109 co-relation queries the response was YES. Maximal size of possible extension queue 2126. Compared 281007 event pairs, 329 based on Foata normal form. 350/29316 useless extension candidates. Maximal degree in co-relation 403682. Up to 9010 conditions per place. [2023-08-30 00:14:36,666 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 1171 selfloop transitions, 4141 changer transitions 24/5336 dead transitions. [2023-08-30 00:14:36,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 5336 transitions, 198621 flow [2023-08-30 00:14:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 00:14:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 00:14:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3175 transitions. [2023-08-30 00:14:36,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409722222222222 [2023-08-30 00:14:36,672 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3175 transitions. [2023-08-30 00:14:36,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3175 transitions. [2023-08-30 00:14:36,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:14:36,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3175 transitions. [2023-08-30 00:14:36,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 70.55555555555556) internal successors, (3175), 45 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:36,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 160.0) internal successors, (7360), 46 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:36,682 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 160.0) internal successors, (7360), 46 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:36,682 INFO L175 Difference]: Start difference. First operand has 601 places, 4829 transitions, 176699 flow. Second operand 45 states and 3175 transitions. [2023-08-30 00:14:36,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 5336 transitions, 198621 flow [2023-08-30 00:15:48,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 5336 transitions, 196724 flow, removed 897 selfloop flow, removed 11 redundant places. [2023-08-30 00:15:48,345 INFO L231 Difference]: Finished difference. Result has 643 places, 5060 transitions, 195824 flow [2023-08-30 00:15:48,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=174831, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3923, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=874, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=195824, PETRI_PLACES=643, PETRI_TRANSITIONS=5060} [2023-08-30 00:15:48,349 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 614 predicate places. [2023-08-30 00:15:48,350 INFO L495 AbstractCegarLoop]: Abstraction has has 643 places, 5060 transitions, 195824 flow [2023-08-30 00:15:48,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 66.76190476190476) internal successors, (1402), 21 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:48,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:15:48,350 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:15:48,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 00:15:48,556 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 [2023-08-30 00:15:48,557 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)] === [2023-08-30 00:15:48,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:15:48,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1331742331, now seen corresponding path program 33 times [2023-08-30 00:15:48,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:15:48,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042309836] [2023-08-30 00:15:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:15:48,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:15:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:15:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:15:48,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:15:48,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042309836] [2023-08-30 00:15:48,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042309836] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:15:48,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431917721] [2023-08-30 00:15:48,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:15:48,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:15:48,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:15:48,691 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) [2023-08-30 00:15:48,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 00:15:48,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 00:15:48,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:15:48,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:15:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:15:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:15:48,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:15:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:15:48,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431917721] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:15:48,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:15:48,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2023-08-30 00:15:48,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208388986] [2023-08-30 00:15:48,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:15:48,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 00:15:48,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:15:48,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 00:15:48,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2023-08-30 00:15:49,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 160 [2023-08-30 00:15:49,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 5060 transitions, 195824 flow. Second operand has 26 states, 26 states have (on average 66.61538461538461) internal successors, (1732), 26 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:49,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:15:49,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 160 [2023-08-30 00:15:49,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:14,500 INFO L130 PetriNetUnfolder]: 21016/39545 cut-off events. [2023-08-30 00:17:14,500 INFO L131 PetriNetUnfolder]: For 3216790/3216790 co-relation queries the response was YES. [2023-08-30 00:17:16,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584611 conditions, 39545 events. 21016/39545 cut-off events. For 3216790/3216790 co-relation queries the response was YES. Maximal size of possible extension queue 2820. Compared 396148 event pairs, 1203 based on Foata normal form. 198/39741 useless extension candidates. Maximal degree in co-relation 584438. Up to 23440 conditions per place. [2023-08-30 00:17:16,543 INFO L137 encePairwiseOnDemand]: 154/160 looper letters, 4434 selfloop transitions, 2808 changer transitions 98/7340 dead transitions. [2023-08-30 00:17:16,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 7340 transitions, 296267 flow [2023-08-30 00:17:16,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 00:17:16,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 00:17:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2846 transitions. [2023-08-30 00:17:16,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4446875 [2023-08-30 00:17:16,546 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2846 transitions. [2023-08-30 00:17:16,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2846 transitions. [2023-08-30 00:17:16,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:16,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2846 transitions. [2023-08-30 00:17:16,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 71.15) internal successors, (2846), 40 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:16,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 160.0) internal successors, (6560), 41 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:16,554 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 160.0) internal successors, (6560), 41 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:16,554 INFO L175 Difference]: Start difference. First operand has 643 places, 5060 transitions, 195824 flow. Second operand 40 states and 2846 transitions. [2023-08-30 00:17:16,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 7340 transitions, 296267 flow Killed by 15