./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.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 e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:48:12,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:48:12,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:48:12,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:48:12,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:48:12,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:48:12,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:48:12,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:48:12,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:48:12,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:48:12,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:48:12,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:48:12,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:48:12,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:48:12,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:48:12,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:48:12,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:48:12,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:48:12,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:48:12,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:48:12,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:48:12,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:48:12,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:48:12,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:48:12,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:48:13,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:48:13,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:48:13,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:48:13,001 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:48:13,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:48:13,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:48:13,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:48:13,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:48:13,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:48:13,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:48:13,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:48:13,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:48:13,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:48:13,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:48:13,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:48:13,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:48:13,009 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:48:13,041 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:48:13,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:48:13,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:48:13,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:48:13,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:48:13,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:48:13,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:48:13,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:48:13,043 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:48:13,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:48:13,044 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:48:13,044 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:48:13,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:48:13,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:48:13,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:48:13,045 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:48:13,045 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:48:13,045 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:48:13,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:48:13,045 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:48:13,046 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:48:13,046 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:48:13,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:48:13,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:48:13,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:48:13,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:48:13,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:48:13,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:48:13,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:48:13,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:48:13,047 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:48:13,048 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:48:13,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:48:13,048 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:48:13,048 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:48:13,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:48:13,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:48:13,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:48:13,324 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:48:13,324 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:48:13,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-09-01 02:48:14,552 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:48:14,762 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:48:14,763 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-09-01 02:48:14,769 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c42cf285f/a658b694d71a47cf9e73a793a55dc396/FLAG513fd9252 [2023-09-01 02:48:14,786 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c42cf285f/a658b694d71a47cf9e73a793a55dc396 [2023-09-01 02:48:14,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:48:14,790 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:48:14,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:48:14,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:48:14,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:48:14,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:48:14" (1/1) ... [2023-09-01 02:48:14,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6272e297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:14, skipping insertion in model container [2023-09-01 02:48:14,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:48:14" (1/1) ... [2023-09-01 02:48:14,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:48:14,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:48:14,990 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-bad-threaded-sum-2.wvr.c[2476,2489] [2023-09-01 02:48:14,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:48:15,006 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:48:15,041 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-bad-threaded-sum-2.wvr.c[2476,2489] [2023-09-01 02:48:15,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:48:15,050 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:48:15,052 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:48:15,057 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:48:15,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:15 WrapperNode [2023-09-01 02:48:15,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:48:15,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:48:15,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:48:15,060 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:48:15,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:15" (1/1) ... [2023-09-01 02:48:15,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:15" (1/1) ... [2023-09-01 02:48:15,101 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2023-09-01 02:48:15,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:48:15,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:48:15,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:48:15,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:48:15,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:15" (1/1) ... [2023-09-01 02:48:15,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:15" (1/1) ... [2023-09-01 02:48:15,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:15" (1/1) ... [2023-09-01 02:48:15,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:15" (1/1) ... [2023-09-01 02:48:15,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:15" (1/1) ... [2023-09-01 02:48:15,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:15" (1/1) ... [2023-09-01 02:48:15,142 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:15" (1/1) ... [2023-09-01 02:48:15,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:15" (1/1) ... [2023-09-01 02:48:15,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:48:15,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:48:15,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:48:15,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:48:15,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:15" (1/1) ... [2023-09-01 02:48:15,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:48:15,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:48:15,175 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 02:48:15,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 02:48:15,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:48:15,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:48:15,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:48:15,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:48:15,217 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:48:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 02:48:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:48:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 02:48:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:48:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:48:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:48:15,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:48:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 02:48:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:48:15,220 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:48:15,295 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:48:15,297 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:48:15,466 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:48:15,542 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:48:15,550 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 02:48:15,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:48:15 BoogieIcfgContainer [2023-09-01 02:48:15,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:48:15,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:48:15,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:48:15,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:48:15,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:48:14" (1/3) ... [2023-09-01 02:48:15,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1c7827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:48:15, skipping insertion in model container [2023-09-01 02:48:15,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:48:15" (2/3) ... [2023-09-01 02:48:15,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1c7827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:48:15, skipping insertion in model container [2023-09-01 02:48:15,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:48:15" (3/3) ... [2023-09-01 02:48:15,559 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2023-09-01 02:48:15,572 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:48:15,572 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 02:48:15,572 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:48:15,635 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 02:48:15,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 95 transitions, 206 flow [2023-09-01 02:48:15,703 INFO L130 PetriNetUnfolder]: 6/93 cut-off events. [2023-09-01 02:48:15,703 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:48:15,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 6/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-09-01 02:48:15,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 95 transitions, 206 flow [2023-09-01 02:48:15,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 89 transitions, 190 flow [2023-09-01 02:48:15,722 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:48:15,730 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 89 transitions, 190 flow [2023-09-01 02:48:15,732 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 89 transitions, 190 flow [2023-09-01 02:48:15,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 190 flow [2023-09-01 02:48:15,768 INFO L130 PetriNetUnfolder]: 6/89 cut-off events. [2023-09-01 02:48:15,769 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 02:48:15,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 89 events. 6/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-09-01 02:48:15,771 INFO L119 LiptonReduction]: Number of co-enabled transitions 532 [2023-09-01 02:48:18,486 INFO L134 LiptonReduction]: Checked pairs total: 987 [2023-09-01 02:48:18,487 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-09-01 02:48:18,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:48:18,504 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;@785a8e9f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:48:18,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-09-01 02:48:18,506 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-09-01 02:48:18,506 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:48:18,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:18,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 02:48:18,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:48:18,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:18,515 INFO L85 PathProgramCache]: Analyzing trace with hash 378, now seen corresponding path program 1 times [2023-09-01 02:48:18,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:48:18,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73288793] [2023-09-01 02:48:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:18,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:48:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:18,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:48:18,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73288793] [2023-09-01 02:48:18,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73288793] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:18,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:48:18,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 02:48:18,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738602552] [2023-09-01 02:48:18,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:18,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 02:48:18,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:48:18,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 02:48:18,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 02:48:18,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 182 [2023-09-01 02:48:18,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:18,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:18,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 182 [2023-09-01 02:48:18,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:18,678 INFO L130 PetriNetUnfolder]: 96/176 cut-off events. [2023-09-01 02:48:18,679 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 02:48:18,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 176 events. 96/176 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 704 event pairs, 66 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 273. Up to 172 conditions per place. [2023-09-01 02:48:18,682 INFO L137 encePairwiseOnDemand]: 179/182 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2023-09-01 02:48:18,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 98 flow [2023-09-01 02:48:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 02:48:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 02:48:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 189 transitions. [2023-09-01 02:48:18,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2023-09-01 02:48:18,695 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 189 transitions. [2023-09-01 02:48:18,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 189 transitions. [2023-09-01 02:48:18,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:18,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 189 transitions. [2023-09-01 02:48:18,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:18,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:18,705 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:18,707 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 2 states and 189 transitions. [2023-09-01 02:48:18,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 98 flow [2023-09-01 02:48:18,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 02:48:18,710 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 50 flow [2023-09-01 02:48:18,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-09-01 02:48:18,714 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2023-09-01 02:48:18,715 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 50 flow [2023-09-01 02:48:18,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:18,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:18,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:48:18,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 02:48:18,716 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:48:18,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:18,716 INFO L85 PathProgramCache]: Analyzing trace with hash 373573, now seen corresponding path program 1 times [2023-09-01 02:48:18,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:48:18,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386752269] [2023-09-01 02:48:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:18,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:48:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:18,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:48:18,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386752269] [2023-09-01 02:48:18,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386752269] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:18,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:48:18,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:48:18,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323261094] [2023-09-01 02:48:18,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:18,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:48:18,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:48:18,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:48:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:48:18,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 182 [2023-09-01 02:48:18,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 50 flow. Second operand has 3 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) [2023-09-01 02:48:18,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:18,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 182 [2023-09-01 02:48:18,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:18,939 INFO L130 PetriNetUnfolder]: 89/162 cut-off events. [2023-09-01 02:48:18,939 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 02:48:18,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 162 events. 89/162 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 643 event pairs, 61 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 323. Up to 157 conditions per place. [2023-09-01 02:48:18,941 INFO L137 encePairwiseOnDemand]: 179/182 looper letters, 17 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-09-01 02:48:18,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 82 flow [2023-09-01 02:48:18,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:48:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:48:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-09-01 02:48:18,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432234432234432 [2023-09-01 02:48:18,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-09-01 02:48:18,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-09-01 02:48:18,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:18,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-09-01 02:48:18,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:18,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:18,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:18,948 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 50 flow. Second operand 3 states and 242 transitions. [2023-09-01 02:48:18,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 82 flow [2023-09-01 02:48:18,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 82 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 02:48:18,949 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 48 flow [2023-09-01 02:48:18,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-09-01 02:48:18,950 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2023-09-01 02:48:18,961 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 48 flow [2023-09-01 02:48:18,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-09-01 02:48:18,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:18,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:48:18,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 02:48:18,962 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:48:18,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:18,968 INFO L85 PathProgramCache]: Analyzing trace with hash 373572, now seen corresponding path program 1 times [2023-09-01 02:48:18,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:48:18,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866303174] [2023-09-01 02:48:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:18,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:48:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:19,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:48:19,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866303174] [2023-09-01 02:48:19,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866303174] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:19,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:48:19,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:48:19,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023040666] [2023-09-01 02:48:19,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:19,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:48:19,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:48:19,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:48:19,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:48:19,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 182 [2023-09-01 02:48:19,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:19,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 182 [2023-09-01 02:48:19,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:19,134 INFO L130 PetriNetUnfolder]: 82/148 cut-off events. [2023-09-01 02:48:19,134 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 02:48:19,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 148 events. 82/148 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 581 event pairs, 56 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 296. Up to 143 conditions per place. [2023-09-01 02:48:19,136 INFO L137 encePairwiseOnDemand]: 179/182 looper letters, 15 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-09-01 02:48:19,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 76 flow [2023-09-01 02:48:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:48:19,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:48:19,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2023-09-01 02:48:19,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-09-01 02:48:19,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2023-09-01 02:48:19,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2023-09-01 02:48:19,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:19,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2023-09-01 02:48:19,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,142 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 48 flow. Second operand 3 states and 252 transitions. [2023-09-01 02:48:19,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 76 flow [2023-09-01 02:48:19,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 19 transitions, 75 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:48:19,143 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 45 flow [2023-09-01 02:48:19,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=22, 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=45, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2023-09-01 02:48:19,144 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2023-09-01 02:48:19,144 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 45 flow [2023-09-01 02:48:19,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:19,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:48:19,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 02:48:19,145 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:48:19,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:19,146 INFO L85 PathProgramCache]: Analyzing trace with hash 359010039, now seen corresponding path program 1 times [2023-09-01 02:48:19,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:48:19,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938864058] [2023-09-01 02:48:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:19,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:48:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:19,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:48:19,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938864058] [2023-09-01 02:48:19,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938864058] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:19,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:48:19,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:48:19,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246329757] [2023-09-01 02:48:19,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:19,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:48:19,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:48:19,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:48:19,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:48:19,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 182 [2023-09-01 02:48:19,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 45 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:19,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 182 [2023-09-01 02:48:19,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:19,241 INFO L130 PetriNetUnfolder]: 62/116 cut-off events. [2023-09-01 02:48:19,242 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 02:48:19,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 116 events. 62/116 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 403 event pairs, 42 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 233. Up to 111 conditions per place. [2023-09-01 02:48:19,243 INFO L137 encePairwiseOnDemand]: 180/182 looper letters, 14 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-09-01 02:48:19,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 18 transitions, 73 flow [2023-09-01 02:48:19,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:48:19,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:48:19,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2023-09-01 02:48:19,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413919413919414 [2023-09-01 02:48:19,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2023-09-01 02:48:19,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2023-09-01 02:48:19,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:19,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2023-09-01 02:48:19,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,248 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 45 flow. Second operand 3 states and 241 transitions. [2023-09-01 02:48:19,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 18 transitions, 73 flow [2023-09-01 02:48:19,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:48:19,249 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 44 flow [2023-09-01 02:48:19,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-09-01 02:48:19,250 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2023-09-01 02:48:19,251 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 44 flow [2023-09-01 02:48:19,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:19,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:48:19,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 02:48:19,252 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:48:19,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:19,252 INFO L85 PathProgramCache]: Analyzing trace with hash 359010038, now seen corresponding path program 1 times [2023-09-01 02:48:19,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:48:19,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089775198] [2023-09-01 02:48:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:19,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:48:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:19,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:48:19,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089775198] [2023-09-01 02:48:19,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089775198] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:19,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:48:19,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:48:19,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059512776] [2023-09-01 02:48:19,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:19,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:48:19,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:48:19,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:48:19,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:48:19,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 182 [2023-09-01 02:48:19,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 44 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:19,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 182 [2023-09-01 02:48:19,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:19,431 INFO L130 PetriNetUnfolder]: 42/84 cut-off events. [2023-09-01 02:48:19,431 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 02:48:19,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 84 events. 42/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 246 event pairs, 28 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 170. Up to 79 conditions per place. [2023-09-01 02:48:19,432 INFO L137 encePairwiseOnDemand]: 180/182 looper letters, 13 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-09-01 02:48:19,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 70 flow [2023-09-01 02:48:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:48:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:48:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-09-01 02:48:19,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41208791208791207 [2023-09-01 02:48:19,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-09-01 02:48:19,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-09-01 02:48:19,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:19,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-09-01 02:48:19,436 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) [2023-09-01 02:48:19,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,437 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,437 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 44 flow. Second operand 3 states and 225 transitions. [2023-09-01 02:48:19,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 70 flow [2023-09-01 02:48:19,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:48:19,439 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 43 flow [2023-09-01 02:48:19,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=22, 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=43, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-09-01 02:48:19,439 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2023-09-01 02:48:19,440 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 43 flow [2023-09-01 02:48:19,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:19,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:19,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 02:48:19,441 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:48:19,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:19,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1890048082, now seen corresponding path program 1 times [2023-09-01 02:48:19,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:48:19,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751817217] [2023-09-01 02:48:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:19,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:48:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:19,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:48:19,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751817217] [2023-09-01 02:48:19,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751817217] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:19,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:48:19,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:48:19,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680709254] [2023-09-01 02:48:19,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:19,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:48:19,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:48:19,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:48:19,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:48:19,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 182 [2023-09-01 02:48:19,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 43 flow. Second operand has 5 states, 5 states have (on average 78.6) internal successors, (393), 5 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:19,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 182 [2023-09-01 02:48:19,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:19,852 INFO L130 PetriNetUnfolder]: 93/165 cut-off events. [2023-09-01 02:48:19,853 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:48:19,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 165 events. 93/165 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 528 event pairs, 3 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 334. Up to 74 conditions per place. [2023-09-01 02:48:19,854 INFO L137 encePairwiseOnDemand]: 176/182 looper letters, 34 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2023-09-01 02:48:19,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 43 transitions, 182 flow [2023-09-01 02:48:19,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:48:19,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:48:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 499 transitions. [2023-09-01 02:48:19,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45695970695970695 [2023-09-01 02:48:19,857 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 499 transitions. [2023-09-01 02:48:19,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 499 transitions. [2023-09-01 02:48:19,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:19,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 499 transitions. [2023-09-01 02:48:19,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.16666666666667) internal successors, (499), 6 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 182.0) internal successors, (1274), 7 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,862 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 182.0) internal successors, (1274), 7 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,862 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 43 flow. Second operand 6 states and 499 transitions. [2023-09-01 02:48:19,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 43 transitions, 182 flow [2023-09-01 02:48:19,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:48:19,864 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 88 flow [2023-09-01 02:48:19,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=88, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2023-09-01 02:48:19,866 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-09-01 02:48:19,867 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 88 flow [2023-09-01 02:48:19,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.6) internal successors, (393), 5 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:19,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:19,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:19,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 02:48:19,869 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:48:19,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:19,869 INFO L85 PathProgramCache]: Analyzing trace with hash 520833762, now seen corresponding path program 1 times [2023-09-01 02:48:19,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:48:19,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302889025] [2023-09-01 02:48:19,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:19,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:48:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:20,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:48:20,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302889025] [2023-09-01 02:48:20,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302889025] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:48:20,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624012613] [2023-09-01 02:48:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:20,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:48:20,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:48:20,149 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:48:20,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 02:48:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:20,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:48:20,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:48:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:48:20,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:48:20,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624012613] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:20,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 02:48:20,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-09-01 02:48:20,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453100276] [2023-09-01 02:48:20,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:20,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:48:20,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:48:20,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:48:20,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:48:20,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 182 [2023-09-01 02:48:20,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:20,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:20,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 182 [2023-09-01 02:48:20,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:20,468 INFO L130 PetriNetUnfolder]: 85/151 cut-off events. [2023-09-01 02:48:20,469 INFO L131 PetriNetUnfolder]: For 66/72 co-relation queries the response was YES. [2023-09-01 02:48:20,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 151 events. 85/151 cut-off events. For 66/72 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 389 event pairs, 8 based on Foata normal form. 16/165 useless extension candidates. Maximal degree in co-relation 433. Up to 105 conditions per place. [2023-09-01 02:48:20,470 INFO L137 encePairwiseOnDemand]: 176/182 looper letters, 26 selfloop transitions, 7 changer transitions 0/35 dead transitions. [2023-09-01 02:48:20,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 195 flow [2023-09-01 02:48:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:48:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:48:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 413 transitions. [2023-09-01 02:48:20,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2023-09-01 02:48:20,473 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 413 transitions. [2023-09-01 02:48:20,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 413 transitions. [2023-09-01 02:48:20,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:20,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 413 transitions. [2023-09-01 02:48:20,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.6) internal successors, (413), 5 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:20,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:20,476 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:20,476 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 88 flow. Second operand 5 states and 413 transitions. [2023-09-01 02:48:20,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 195 flow [2023-09-01 02:48:20,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:48:20,478 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 131 flow [2023-09-01 02:48:20,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2023-09-01 02:48:20,479 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-09-01 02:48:20,479 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 131 flow [2023-09-01 02:48:20,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:20,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:20,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:20,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 02:48:20,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:48:20,693 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:48:20,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash 367215616, now seen corresponding path program 2 times [2023-09-01 02:48:20,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:48:20,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969137149] [2023-09-01 02:48:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:20,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:48:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:20,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:48:20,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969137149] [2023-09-01 02:48:20,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969137149] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:48:20,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314917292] [2023-09-01 02:48:20,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:48:20,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:48:20,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:48:20,953 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:48:20,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 02:48:21,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 02:48:21,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:48:21,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:48:21,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:48:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:48:21,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:48:21,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314917292] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:21,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 02:48:21,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-09-01 02:48:21,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667951197] [2023-09-01 02:48:21,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:21,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:48:21,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:48:21,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:48:21,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:48:21,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 182 [2023-09-01 02:48:21,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:21,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:21,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 182 [2023-09-01 02:48:21,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:21,179 INFO L130 PetriNetUnfolder]: 114/200 cut-off events. [2023-09-01 02:48:21,179 INFO L131 PetriNetUnfolder]: For 182/192 co-relation queries the response was YES. [2023-09-01 02:48:21,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 200 events. 114/200 cut-off events. For 182/192 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 606 event pairs, 24 based on Foata normal form. 16/216 useless extension candidates. Maximal degree in co-relation 635. Up to 141 conditions per place. [2023-09-01 02:48:21,182 INFO L137 encePairwiseOnDemand]: 176/182 looper letters, 31 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2023-09-01 02:48:21,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 257 flow [2023-09-01 02:48:21,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:48:21,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:48:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 415 transitions. [2023-09-01 02:48:21,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2023-09-01 02:48:21,184 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 415 transitions. [2023-09-01 02:48:21,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 415 transitions. [2023-09-01 02:48:21,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:21,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 415 transitions. [2023-09-01 02:48:21,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:21,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:21,187 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:21,187 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 131 flow. Second operand 5 states and 415 transitions. [2023-09-01 02:48:21,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 257 flow [2023-09-01 02:48:21,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 253 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:48:21,190 INFO L231 Difference]: Finished difference. Result has 41 places, 26 transitions, 152 flow [2023-09-01 02:48:21,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=41, PETRI_TRANSITIONS=26} [2023-09-01 02:48:21,191 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2023-09-01 02:48:21,191 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 26 transitions, 152 flow [2023-09-01 02:48:21,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:21,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:21,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:21,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 02:48:21,398 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,SelfDestructingSolverStorable7 [2023-09-01 02:48:21,398 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:48:21,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:21,399 INFO L85 PathProgramCache]: Analyzing trace with hash -752114364, now seen corresponding path program 3 times [2023-09-01 02:48:21,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:48:21,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752834637] [2023-09-01 02:48:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:21,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:48:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:21,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:48:21,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752834637] [2023-09-01 02:48:21,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752834637] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:21,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:48:21,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:48:21,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123897969] [2023-09-01 02:48:21,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:21,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:48:21,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:48:21,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:48:21,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:48:21,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 182 [2023-09-01 02:48:21,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 26 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:21,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:21,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 182 [2023-09-01 02:48:21,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:21,828 INFO L130 PetriNetUnfolder]: 216/387 cut-off events. [2023-09-01 02:48:21,828 INFO L131 PetriNetUnfolder]: For 402/402 co-relation queries the response was YES. [2023-09-01 02:48:21,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 387 events. 216/387 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1463 event pairs, 34 based on Foata normal form. 4/391 useless extension candidates. Maximal degree in co-relation 1273. Up to 168 conditions per place. [2023-09-01 02:48:21,832 INFO L137 encePairwiseOnDemand]: 177/182 looper letters, 55 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2023-09-01 02:48:21,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 71 transitions, 466 flow [2023-09-01 02:48:21,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 02:48:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 02:48:21,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 584 transitions. [2023-09-01 02:48:21,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45839874411302983 [2023-09-01 02:48:21,835 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 584 transitions. [2023-09-01 02:48:21,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 584 transitions. [2023-09-01 02:48:21,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:21,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 584 transitions. [2023-09-01 02:48:21,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:21,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 182.0) internal successors, (1456), 8 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:21,839 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 182.0) internal successors, (1456), 8 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:21,839 INFO L175 Difference]: Start difference. First operand has 41 places, 26 transitions, 152 flow. Second operand 7 states and 584 transitions. [2023-09-01 02:48:21,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 71 transitions, 466 flow [2023-09-01 02:48:21,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 71 transitions, 453 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 02:48:21,844 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 279 flow [2023-09-01 02:48:21,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=279, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-09-01 02:48:21,845 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2023-09-01 02:48:21,845 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 279 flow [2023-09-01 02:48:21,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:21,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:21,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:21,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 02:48:21,846 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:48:21,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:21,847 INFO L85 PathProgramCache]: Analyzing trace with hash 703638542, now seen corresponding path program 4 times [2023-09-01 02:48:21,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:48:21,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340193788] [2023-09-01 02:48:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:21,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:48:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:22,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:48:22,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340193788] [2023-09-01 02:48:22,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340193788] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:48:22,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854366300] [2023-09-01 02:48:22,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:48:22,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:48:22,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:48:22,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:48:22,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 02:48:22,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:48:22,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:48:22,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 02:48:22,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:48:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:22,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:48:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:23,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854366300] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:48:23,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:48:23,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-09-01 02:48:23,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070290716] [2023-09-01 02:48:23,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:48:23,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 02:48:23,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:48:23,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 02:48:23,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2023-09-01 02:48:23,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-09-01 02:48:23,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 279 flow. Second operand has 20 states, 20 states have (on average 68.25) internal successors, (1365), 20 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:23,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:23,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-09-01 02:48:23,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:27,239 INFO L130 PetriNetUnfolder]: 755/1383 cut-off events. [2023-09-01 02:48:27,240 INFO L131 PetriNetUnfolder]: For 3322/3322 co-relation queries the response was YES. [2023-09-01 02:48:27,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5474 conditions, 1383 events. 755/1383 cut-off events. For 3322/3322 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7544 event pairs, 32 based on Foata normal form. 21/1404 useless extension candidates. Maximal degree in co-relation 5459. Up to 493 conditions per place. [2023-09-01 02:48:27,250 INFO L137 encePairwiseOnDemand]: 172/182 looper letters, 121 selfloop transitions, 115 changer transitions 99/335 dead transitions. [2023-09-01 02:48:27,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 335 transitions, 2784 flow [2023-09-01 02:48:27,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-09-01 02:48:27,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-09-01 02:48:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3496 transitions. [2023-09-01 02:48:27,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39201614711818794 [2023-09-01 02:48:27,260 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3496 transitions. [2023-09-01 02:48:27,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3496 transitions. [2023-09-01 02:48:27,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:27,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3496 transitions. [2023-09-01 02:48:27,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 71.34693877551021) internal successors, (3496), 49 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:27,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 182.0) internal successors, (9100), 50 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:27,285 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 182.0) internal successors, (9100), 50 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:27,285 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 279 flow. Second operand 49 states and 3496 transitions. [2023-09-01 02:48:27,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 335 transitions, 2784 flow [2023-09-01 02:48:27,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 335 transitions, 2656 flow, removed 64 selfloop flow, removed 0 redundant places. [2023-09-01 02:48:27,302 INFO L231 Difference]: Finished difference. Result has 127 places, 163 transitions, 1658 flow [2023-09-01 02:48:27,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=1658, PETRI_PLACES=127, PETRI_TRANSITIONS=163} [2023-09-01 02:48:27,304 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 96 predicate places. [2023-09-01 02:48:27,304 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 163 transitions, 1658 flow [2023-09-01 02:48:27,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 68.25) internal successors, (1365), 20 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:27,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:27,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:27,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 02:48:27,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:48:27,511 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:48:27,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:27,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1382515146, now seen corresponding path program 1 times [2023-09-01 02:48:27,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:48:27,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818466518] [2023-09-01 02:48:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:27,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:48:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:27,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:48:27,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818466518] [2023-09-01 02:48:27,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818466518] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:27,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:48:27,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:48:27,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556623942] [2023-09-01 02:48:27,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:27,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:48:27,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:48:27,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:48:27,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:48:27,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 182 [2023-09-01 02:48:27,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 163 transitions, 1658 flow. Second operand has 5 states, 5 states have (on average 78.4) internal successors, (392), 5 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:27,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:27,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 182 [2023-09-01 02:48:27,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:27,976 INFO L130 PetriNetUnfolder]: 534/929 cut-off events. [2023-09-01 02:48:27,976 INFO L131 PetriNetUnfolder]: For 8377/8377 co-relation queries the response was YES. [2023-09-01 02:48:27,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5085 conditions, 929 events. 534/929 cut-off events. For 8377/8377 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4261 event pairs, 69 based on Foata normal form. 4/933 useless extension candidates. Maximal degree in co-relation 5038. Up to 390 conditions per place. [2023-09-01 02:48:27,987 INFO L137 encePairwiseOnDemand]: 177/182 looper letters, 135 selfloop transitions, 74 changer transitions 0/209 dead transitions. [2023-09-01 02:48:27,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 209 transitions, 2457 flow [2023-09-01 02:48:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:48:27,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:48:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 423 transitions. [2023-09-01 02:48:27,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46483516483516485 [2023-09-01 02:48:27,990 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 423 transitions. [2023-09-01 02:48:27,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 423 transitions. [2023-09-01 02:48:27,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:27,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 423 transitions. [2023-09-01 02:48:27,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.6) internal successors, (423), 5 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:27,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:27,993 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:27,993 INFO L175 Difference]: Start difference. First operand has 127 places, 163 transitions, 1658 flow. Second operand 5 states and 423 transitions. [2023-09-01 02:48:27,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 209 transitions, 2457 flow [2023-09-01 02:48:28,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 209 transitions, 1982 flow, removed 220 selfloop flow, removed 17 redundant places. [2023-09-01 02:48:28,053 INFO L231 Difference]: Finished difference. Result has 104 places, 162 transitions, 1450 flow [2023-09-01 02:48:28,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1450, PETRI_PLACES=104, PETRI_TRANSITIONS=162} [2023-09-01 02:48:28,053 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2023-09-01 02:48:28,054 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 162 transitions, 1450 flow [2023-09-01 02:48:28,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.4) internal successors, (392), 5 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:28,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:28,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:28,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 02:48:28,055 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:48:28,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:28,055 INFO L85 PathProgramCache]: Analyzing trace with hash 245937960, now seen corresponding path program 2 times [2023-09-01 02:48:28,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:48:28,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880761210] [2023-09-01 02:48:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:28,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:48:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:29,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:48:29,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880761210] [2023-09-01 02:48:29,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880761210] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:48:29,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839822421] [2023-09-01 02:48:29,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:48:29,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:48:29,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:48:29,417 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:48:29,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 02:48:29,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:48:29,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:48:29,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 02:48:29,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:48:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:30,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:48:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:31,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839822421] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:48:31,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:48:31,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-09-01 02:48:31,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173826131] [2023-09-01 02:48:31,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:48:31,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 02:48:31,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:48:31,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 02:48:31,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-09-01 02:48:32,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 182 [2023-09-01 02:48:32,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 162 transitions, 1450 flow. Second operand has 24 states, 24 states have (on average 72.08333333333333) internal successors, (1730), 24 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:32,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:32,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 182 [2023-09-01 02:48:32,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:41,043 INFO L130 PetriNetUnfolder]: 1129/2013 cut-off events. [2023-09-01 02:48:41,044 INFO L131 PetriNetUnfolder]: For 22176/22192 co-relation queries the response was YES. [2023-09-01 02:48:41,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10057 conditions, 2013 events. 1129/2013 cut-off events. For 22176/22192 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11265 event pairs, 2 based on Foata normal form. 24/2031 useless extension candidates. Maximal degree in co-relation 10022. Up to 435 conditions per place. [2023-09-01 02:48:41,063 INFO L137 encePairwiseOnDemand]: 174/182 looper letters, 239 selfloop transitions, 241 changer transitions 94/577 dead transitions. [2023-09-01 02:48:41,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 577 transitions, 5884 flow [2023-09-01 02:48:41,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-09-01 02:48:41,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-09-01 02:48:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3992 transitions. [2023-09-01 02:48:41,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41385030064275347 [2023-09-01 02:48:41,073 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3992 transitions. [2023-09-01 02:48:41,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3992 transitions. [2023-09-01 02:48:41,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:41,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3992 transitions. [2023-09-01 02:48:41,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 75.32075471698113) internal successors, (3992), 53 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:41,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 182.0) internal successors, (9828), 54 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:41,095 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 182.0) internal successors, (9828), 54 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:41,095 INFO L175 Difference]: Start difference. First operand has 104 places, 162 transitions, 1450 flow. Second operand 53 states and 3992 transitions. [2023-09-01 02:48:41,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 577 transitions, 5884 flow [2023-09-01 02:48:41,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 577 transitions, 5386 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-09-01 02:48:41,199 INFO L231 Difference]: Finished difference. Result has 168 places, 335 transitions, 3298 flow [2023-09-01 02:48:41,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=3298, PETRI_PLACES=168, PETRI_TRANSITIONS=335} [2023-09-01 02:48:41,200 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 137 predicate places. [2023-09-01 02:48:41,200 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 335 transitions, 3298 flow [2023-09-01 02:48:41,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 72.08333333333333) internal successors, (1730), 24 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:41,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:41,201 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:41,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 02:48:41,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:48:41,407 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:48:41,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:41,408 INFO L85 PathProgramCache]: Analyzing trace with hash 158858292, now seen corresponding path program 3 times [2023-09-01 02:48:41,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:48:41,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185586637] [2023-09-01 02:48:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:41,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:48:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:42,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:48:42,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185586637] [2023-09-01 02:48:42,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185586637] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:48:42,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988987604] [2023-09-01 02:48:42,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:48:42,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:48:42,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:48:42,429 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:48:42,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 02:48:42,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 02:48:42,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:48:42,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 02:48:42,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:48:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:43,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:48:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:45,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988987604] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:48:45,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:48:45,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-09-01 02:48:45,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376933783] [2023-09-01 02:48:45,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:48:45,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 02:48:45,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:48:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 02:48:45,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2023-09-01 02:48:45,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-09-01 02:48:45,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 335 transitions, 3298 flow. Second operand has 28 states, 28 states have (on average 67.89285714285714) internal successors, (1901), 28 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:45,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:45,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-09-01 02:48:45,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:57,880 INFO L130 PetriNetUnfolder]: 2010/3599 cut-off events. [2023-09-01 02:48:57,880 INFO L131 PetriNetUnfolder]: For 39005/39005 co-relation queries the response was YES. [2023-09-01 02:48:57,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19256 conditions, 3599 events. 2010/3599 cut-off events. For 39005/39005 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22794 event pairs, 30 based on Foata normal form. 16/3613 useless extension candidates. Maximal degree in co-relation 19205. Up to 761 conditions per place. [2023-09-01 02:48:57,919 INFO L137 encePairwiseOnDemand]: 172/182 looper letters, 247 selfloop transitions, 657 changer transitions 82/986 dead transitions. [2023-09-01 02:48:57,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 986 transitions, 11644 flow [2023-09-01 02:48:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-09-01 02:48:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2023-09-01 02:48:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 6646 transitions. [2023-09-01 02:48:57,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884732288987608 [2023-09-01 02:48:57,930 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 6646 transitions. [2023-09-01 02:48:57,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 6646 transitions. [2023-09-01 02:48:57,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:57,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 6646 transitions. [2023-09-01 02:48:57,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 70.70212765957447) internal successors, (6646), 94 states have internal predecessors, (6646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:57,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 182.0) internal successors, (17290), 95 states have internal predecessors, (17290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:57,977 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 182.0) internal successors, (17290), 95 states have internal predecessors, (17290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:57,977 INFO L175 Difference]: Start difference. First operand has 168 places, 335 transitions, 3298 flow. Second operand 94 states and 6646 transitions. [2023-09-01 02:48:57,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 986 transitions, 11644 flow [2023-09-01 02:48:58,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 986 transitions, 10956 flow, removed 329 selfloop flow, removed 14 redundant places. [2023-09-01 02:48:58,126 INFO L231 Difference]: Finished difference. Result has 268 places, 726 transitions, 8686 flow [2023-09-01 02:48:58,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=3062, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=8686, PETRI_PLACES=268, PETRI_TRANSITIONS=726} [2023-09-01 02:48:58,127 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 237 predicate places. [2023-09-01 02:48:58,127 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 726 transitions, 8686 flow [2023-09-01 02:48:58,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 67.89285714285714) internal successors, (1901), 28 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:58,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:58,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:58,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 02:48:58,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 02:48:58,329 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:48:58,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:58,329 INFO L85 PathProgramCache]: Analyzing trace with hash 57270964, now seen corresponding path program 4 times [2023-09-01 02:48:58,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:48:58,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207432149] [2023-09-01 02:48:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:58,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:48:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:48:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:48:58,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:48:58,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207432149] [2023-09-01 02:48:58,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207432149] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:48:58,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:48:58,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:48:58,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201812799] [2023-09-01 02:48:58,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:48:58,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:48:58,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:48:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:48:58,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:48:58,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 182 [2023-09-01 02:48:58,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 726 transitions, 8686 flow. Second operand has 5 states, 5 states have (on average 76.8) internal successors, (384), 5 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:58,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:48:58,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 182 [2023-09-01 02:48:58,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:48:59,535 INFO L130 PetriNetUnfolder]: 1964/3431 cut-off events. [2023-09-01 02:48:59,535 INFO L131 PetriNetUnfolder]: For 65976/65976 co-relation queries the response was YES. [2023-09-01 02:48:59,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21290 conditions, 3431 events. 1964/3431 cut-off events. For 65976/65976 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20834 event pairs, 54 based on Foata normal form. 46/3475 useless extension candidates. Maximal degree in co-relation 21217. Up to 2045 conditions per place. [2023-09-01 02:48:59,575 INFO L137 encePairwiseOnDemand]: 174/182 looper letters, 469 selfloop transitions, 425 changer transitions 0/894 dead transitions. [2023-09-01 02:48:59,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 894 transitions, 12382 flow [2023-09-01 02:48:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:48:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:48:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 714 transitions. [2023-09-01 02:48:59,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2023-09-01 02:48:59,578 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 714 transitions. [2023-09-01 02:48:59,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 714 transitions. [2023-09-01 02:48:59,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:48:59,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 714 transitions. [2023-09-01 02:48:59,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.33333333333333) internal successors, (714), 9 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:59,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 182.0) internal successors, (1820), 10 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:59,581 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 182.0) internal successors, (1820), 10 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:59,581 INFO L175 Difference]: Start difference. First operand has 268 places, 726 transitions, 8686 flow. Second operand 9 states and 714 transitions. [2023-09-01 02:48:59,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 894 transitions, 12382 flow [2023-09-01 02:48:59,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 894 transitions, 11445 flow, removed 200 selfloop flow, removed 25 redundant places. [2023-09-01 02:48:59,923 INFO L231 Difference]: Finished difference. Result has 248 places, 819 transitions, 10436 flow [2023-09-01 02:48:59,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=7823, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10436, PETRI_PLACES=248, PETRI_TRANSITIONS=819} [2023-09-01 02:48:59,924 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 217 predicate places. [2023-09-01 02:48:59,924 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 819 transitions, 10436 flow [2023-09-01 02:48:59,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.8) internal successors, (384), 5 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:48:59,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:48:59,925 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:48:59,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 02:48:59,925 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:48:59,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:48:59,925 INFO L85 PathProgramCache]: Analyzing trace with hash 761517560, now seen corresponding path program 5 times [2023-09-01 02:48:59,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:48:59,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328689779] [2023-09-01 02:48:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:48:59,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:48:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:01,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:49:01,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328689779] [2023-09-01 02:49:01,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328689779] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:49:01,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425744297] [2023-09-01 02:49:01,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:49:01,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:49:01,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:49:01,531 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:49:01,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 02:49:01,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 02:49:01,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:49:01,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 02:49:01,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:02,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:49:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:04,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425744297] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:49:04,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:49:04,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-09-01 02:49:04,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660859576] [2023-09-01 02:49:04,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:49:04,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 02:49:04,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:49:04,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 02:49:04,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2023-09-01 02:49:05,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-09-01 02:49:05,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 819 transitions, 10436 flow. Second operand has 25 states, 25 states have (on average 68.08) internal successors, (1702), 25 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:05,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:05,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-09-01 02:49:05,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:20,409 INFO L130 PetriNetUnfolder]: 2758/4879 cut-off events. [2023-09-01 02:49:20,409 INFO L131 PetriNetUnfolder]: For 89549/89549 co-relation queries the response was YES. [2023-09-01 02:49:20,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32554 conditions, 4879 events. 2758/4879 cut-off events. For 89549/89549 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 32240 event pairs, 18 based on Foata normal form. 18/4897 useless extension candidates. Maximal degree in co-relation 32487. Up to 1561 conditions per place. [2023-09-01 02:49:20,450 INFO L137 encePairwiseOnDemand]: 173/182 looper letters, 488 selfloop transitions, 704 changer transitions 117/1309 dead transitions. [2023-09-01 02:49:20,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1309 transitions, 19185 flow [2023-09-01 02:49:20,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-09-01 02:49:20,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-09-01 02:49:20,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3699 transitions. [2023-09-01 02:49:20,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3908495350803043 [2023-09-01 02:49:20,464 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3699 transitions. [2023-09-01 02:49:20,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3699 transitions. [2023-09-01 02:49:20,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:20,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3699 transitions. [2023-09-01 02:49:20,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 71.13461538461539) internal successors, (3699), 52 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:20,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 182.0) internal successors, (9646), 53 states have internal predecessors, (9646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:20,489 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 182.0) internal successors, (9646), 53 states have internal predecessors, (9646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:20,489 INFO L175 Difference]: Start difference. First operand has 248 places, 819 transitions, 10436 flow. Second operand 52 states and 3699 transitions. [2023-09-01 02:49:20,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1309 transitions, 19185 flow [2023-09-01 02:49:21,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 1309 transitions, 18893 flow, removed 84 selfloop flow, removed 5 redundant places. [2023-09-01 02:49:21,176 INFO L231 Difference]: Finished difference. Result has 319 places, 1034 transitions, 15520 flow [2023-09-01 02:49:21,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=10282, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=15520, PETRI_PLACES=319, PETRI_TRANSITIONS=1034} [2023-09-01 02:49:21,178 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 288 predicate places. [2023-09-01 02:49:21,178 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 1034 transitions, 15520 flow [2023-09-01 02:49:21,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 68.08) internal successors, (1702), 25 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:21,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:21,179 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:49:21,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:21,384 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,SelfDestructingSolverStorable14 [2023-09-01 02:49:21,385 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:49:21,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:21,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1766521832, now seen corresponding path program 6 times [2023-09-01 02:49:21,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:49:21,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598796441] [2023-09-01 02:49:21,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:21,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:49:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:22,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:49:22,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598796441] [2023-09-01 02:49:22,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598796441] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:49:22,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211573956] [2023-09-01 02:49:22,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 02:49:22,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:49:22,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:49:22,257 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:49:22,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 02:49:22,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 02:49:22,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:49:22,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 02:49:22,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:23,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:49:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:24,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211573956] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:49:24,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:49:24,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2023-09-01 02:49:24,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099164831] [2023-09-01 02:49:24,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:49:24,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 02:49:24,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:49:24,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 02:49:24,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2023-09-01 02:49:24,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-09-01 02:49:24,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 1034 transitions, 15520 flow. Second operand has 30 states, 30 states have (on average 67.9) internal successors, (2037), 30 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:24,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:24,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-09-01 02:49:24,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:38,203 INFO L130 PetriNetUnfolder]: 3078/5478 cut-off events. [2023-09-01 02:49:38,204 INFO L131 PetriNetUnfolder]: For 96127/96127 co-relation queries the response was YES. [2023-09-01 02:49:38,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38841 conditions, 5478 events. 3078/5478 cut-off events. For 96127/96127 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 37132 event pairs, 1 based on Foata normal form. 27/5505 useless extension candidates. Maximal degree in co-relation 38751. Up to 1553 conditions per place. [2023-09-01 02:49:38,313 INFO L137 encePairwiseOnDemand]: 173/182 looper letters, 308 selfloop transitions, 1045 changer transitions 150/1503 dead transitions. [2023-09-01 02:49:38,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1503 transitions, 24276 flow [2023-09-01 02:49:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-09-01 02:49:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-09-01 02:49:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4485 transitions. [2023-09-01 02:49:38,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2023-09-01 02:49:38,320 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4485 transitions. [2023-09-01 02:49:38,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4485 transitions. [2023-09-01 02:49:38,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:38,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4485 transitions. [2023-09-01 02:49:38,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 71.19047619047619) internal successors, (4485), 63 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:38,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 182.0) internal successors, (11648), 64 states have internal predecessors, (11648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:38,335 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 182.0) internal successors, (11648), 64 states have internal predecessors, (11648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:38,335 INFO L175 Difference]: Start difference. First operand has 319 places, 1034 transitions, 15520 flow. Second operand 63 states and 4485 transitions. [2023-09-01 02:49:38,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1503 transitions, 24276 flow [2023-09-01 02:49:39,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1503 transitions, 23669 flow, removed 281 selfloop flow, removed 20 redundant places. [2023-09-01 02:49:39,196 INFO L231 Difference]: Finished difference. Result has 367 places, 1221 transitions, 21367 flow [2023-09-01 02:49:39,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=15204, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1034, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=867, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=21367, PETRI_PLACES=367, PETRI_TRANSITIONS=1221} [2023-09-01 02:49:39,199 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 336 predicate places. [2023-09-01 02:49:39,199 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 1221 transitions, 21367 flow [2023-09-01 02:49:39,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 67.9) internal successors, (2037), 30 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:39,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:39,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:49:39,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:39,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:49:39,406 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:49:39,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:39,406 INFO L85 PathProgramCache]: Analyzing trace with hash -521172902, now seen corresponding path program 7 times [2023-09-01 02:49:39,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:49:39,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985729119] [2023-09-01 02:49:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:39,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:49:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:40,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:49:40,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985729119] [2023-09-01 02:49:40,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985729119] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:49:40,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258008207] [2023-09-01 02:49:40,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 02:49:40,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:49:40,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:49:40,022 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:49:40,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 02:49:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:40,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 02:49:40,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:40,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:49:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:41,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258008207] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:49:41,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:49:41,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-09-01 02:49:41,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765690070] [2023-09-01 02:49:41,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:49:41,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 02:49:41,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:49:41,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 02:49:41,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-09-01 02:49:42,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 182 [2023-09-01 02:49:42,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1221 transitions, 21367 flow. Second operand has 25 states, 25 states have (on average 72.0) internal successors, (1800), 25 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:42,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:42,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 182 [2023-09-01 02:49:42,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:58,566 INFO L130 PetriNetUnfolder]: 3692/6537 cut-off events. [2023-09-01 02:49:58,566 INFO L131 PetriNetUnfolder]: For 123068/123080 co-relation queries the response was YES. [2023-09-01 02:49:58,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52463 conditions, 6537 events. 3692/6537 cut-off events. For 123068/123080 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 45537 event pairs, 10 based on Foata normal form. 35/6570 useless extension candidates. Maximal degree in co-relation 52368. Up to 1990 conditions per place. [2023-09-01 02:49:58,641 INFO L137 encePairwiseOnDemand]: 174/182 looper letters, 564 selfloop transitions, 1019 changer transitions 211/1799 dead transitions. [2023-09-01 02:49:58,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1799 transitions, 33991 flow [2023-09-01 02:49:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-09-01 02:49:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-09-01 02:49:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4958 transitions. [2023-09-01 02:49:58,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41275391275391277 [2023-09-01 02:49:58,648 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4958 transitions. [2023-09-01 02:49:58,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4958 transitions. [2023-09-01 02:49:58,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:58,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4958 transitions. [2023-09-01 02:49:58,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 75.12121212121212) internal successors, (4958), 66 states have internal predecessors, (4958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:58,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 182.0) internal successors, (12194), 67 states have internal predecessors, (12194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:58,664 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 182.0) internal successors, (12194), 67 states have internal predecessors, (12194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:49:58,664 INFO L175 Difference]: Start difference. First operand has 367 places, 1221 transitions, 21367 flow. Second operand 66 states and 4958 transitions. [2023-09-01 02:49:58,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1799 transitions, 33991 flow [2023-09-01 02:50:00,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1799 transitions, 32418 flow, removed 412 selfloop flow, removed 21 redundant places. [2023-09-01 02:50:00,295 INFO L231 Difference]: Finished difference. Result has 429 places, 1412 transitions, 28156 flow [2023-09-01 02:50:00,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=20492, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=28156, PETRI_PLACES=429, PETRI_TRANSITIONS=1412} [2023-09-01 02:50:00,296 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 398 predicate places. [2023-09-01 02:50:00,296 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 1412 transitions, 28156 flow [2023-09-01 02:50:00,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 72.0) internal successors, (1800), 25 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:00,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:00,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:00,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:00,502 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,SelfDestructingSolverStorable16 [2023-09-01 02:50:00,503 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:50:00,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:00,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1417186328, now seen corresponding path program 8 times [2023-09-01 02:50:00,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:50:00,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439358152] [2023-09-01 02:50:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:00,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:50:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:01,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:50:01,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439358152] [2023-09-01 02:50:01,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439358152] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:50:01,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183958335] [2023-09-01 02:50:01,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:50:01,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:50:01,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:50:01,220 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:50:01,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 02:50:01,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:50:01,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:50:01,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 02:50:01,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:01,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:50:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:02,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183958335] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:50:02,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:50:02,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-09-01 02:50:02,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314669312] [2023-09-01 02:50:02,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:50:02,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 02:50:02,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:50:02,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 02:50:02,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-09-01 02:50:03,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-09-01 02:50:03,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 1412 transitions, 28156 flow. Second operand has 24 states, 24 states have (on average 68.04166666666667) internal successors, (1633), 24 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:03,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:03,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-09-01 02:50:03,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:20,148 INFO L130 PetriNetUnfolder]: 5154/9180 cut-off events. [2023-09-01 02:50:20,149 INFO L131 PetriNetUnfolder]: For 156124/156124 co-relation queries the response was YES. [2023-09-01 02:50:20,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77538 conditions, 9180 events. 5154/9180 cut-off events. For 156124/156124 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 67730 event pairs, 164 based on Foata normal form. 53/9233 useless extension candidates. Maximal degree in co-relation 77423. Up to 2699 conditions per place. [2023-09-01 02:50:20,263 INFO L137 encePairwiseOnDemand]: 172/182 looper letters, 915 selfloop transitions, 1251 changer transitions 258/2424 dead transitions. [2023-09-01 02:50:20,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 2424 transitions, 50161 flow [2023-09-01 02:50:20,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-09-01 02:50:20,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-09-01 02:50:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6050 transitions. [2023-09-01 02:50:20,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39107950872656755 [2023-09-01 02:50:20,270 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6050 transitions. [2023-09-01 02:50:20,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6050 transitions. [2023-09-01 02:50:20,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:20,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6050 transitions. [2023-09-01 02:50:20,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 71.17647058823529) internal successors, (6050), 85 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:20,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 182.0) internal successors, (15652), 86 states have internal predecessors, (15652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:20,290 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 182.0) internal successors, (15652), 86 states have internal predecessors, (15652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:20,290 INFO L175 Difference]: Start difference. First operand has 429 places, 1412 transitions, 28156 flow. Second operand 85 states and 6050 transitions. [2023-09-01 02:50:20,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 2424 transitions, 50161 flow [2023-09-01 02:50:22,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 2424 transitions, 49413 flow, removed 265 selfloop flow, removed 25 redundant places. [2023-09-01 02:50:22,985 INFO L231 Difference]: Finished difference. Result has 524 places, 1929 transitions, 43625 flow [2023-09-01 02:50:22,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=27637, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=43625, PETRI_PLACES=524, PETRI_TRANSITIONS=1929} [2023-09-01 02:50:22,987 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 493 predicate places. [2023-09-01 02:50:22,987 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 1929 transitions, 43625 flow [2023-09-01 02:50:22,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.04166666666667) internal successors, (1633), 24 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:22,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:22,988 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:22,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:23,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 02:50:23,194 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:50:23,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:23,194 INFO L85 PathProgramCache]: Analyzing trace with hash -454296388, now seen corresponding path program 9 times [2023-09-01 02:50:23,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:50:23,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736874298] [2023-09-01 02:50:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:23,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:50:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:25,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:50:25,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736874298] [2023-09-01 02:50:25,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736874298] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:50:25,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140956341] [2023-09-01 02:50:25,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:50:25,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:50:25,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:50:25,080 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:50:25,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 02:50:25,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 02:50:25,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:50:25,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 02:50:25,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:26,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:50:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:29,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140956341] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:50:29,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:50:29,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 29 [2023-09-01 02:50:29,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743073569] [2023-09-01 02:50:29,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:50:29,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 02:50:29,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:50:29,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 02:50:29,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2023-09-01 02:50:29,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-09-01 02:50:29,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 1929 transitions, 43625 flow. Second operand has 31 states, 31 states have (on average 67.90322580645162) internal successors, (2105), 31 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:29,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:29,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-09-01 02:50:29,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:53,767 INFO L130 PetriNetUnfolder]: 5426/9523 cut-off events. [2023-09-01 02:50:53,768 INFO L131 PetriNetUnfolder]: For 227354/227354 co-relation queries the response was YES. [2023-09-01 02:50:53,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90801 conditions, 9523 events. 5426/9523 cut-off events. For 227354/227354 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 69788 event pairs, 1 based on Foata normal form. 12/9535 useless extension candidates. Maximal degree in co-relation 90640. Up to 2435 conditions per place. [2023-09-01 02:50:53,918 INFO L137 encePairwiseOnDemand]: 172/182 looper letters, 253 selfloop transitions, 2211 changer transitions 98/2562 dead transitions. [2023-09-01 02:50:53,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 2562 transitions, 60314 flow [2023-09-01 02:50:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-09-01 02:50:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-09-01 02:50:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5313 transitions. [2023-09-01 02:50:53,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892307692307692 [2023-09-01 02:50:53,926 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5313 transitions. [2023-09-01 02:50:53,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5313 transitions. [2023-09-01 02:50:53,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:53,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5313 transitions. [2023-09-01 02:50:53,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 70.84) internal successors, (5313), 75 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:53,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 182.0) internal successors, (13832), 76 states have internal predecessors, (13832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:53,945 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 182.0) internal successors, (13832), 76 states have internal predecessors, (13832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:53,945 INFO L175 Difference]: Start difference. First operand has 524 places, 1929 transitions, 43625 flow. Second operand 75 states and 5313 transitions. [2023-09-01 02:50:53,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 2562 transitions, 60314 flow [2023-09-01 02:50:58,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 2562 transitions, 59194 flow, removed 408 selfloop flow, removed 43 redundant places. [2023-09-01 02:50:58,734 INFO L231 Difference]: Finished difference. Result has 543 places, 2323 transitions, 58205 flow [2023-09-01 02:50:58,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=42953, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1825, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=58205, PETRI_PLACES=543, PETRI_TRANSITIONS=2323} [2023-09-01 02:50:58,736 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 512 predicate places. [2023-09-01 02:50:58,736 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 2323 transitions, 58205 flow [2023-09-01 02:50:58,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 67.90322580645162) internal successors, (2105), 31 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:50:58,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:58,737 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:58,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:58,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:50:58,943 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:50:58,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:58,943 INFO L85 PathProgramCache]: Analyzing trace with hash 813578442, now seen corresponding path program 10 times [2023-09-01 02:50:58,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:50:58,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017551924] [2023-09-01 02:50:58,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:58,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:50:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:51:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:51:00,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:51:00,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017551924] [2023-09-01 02:51:00,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017551924] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:51:00,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681082338] [2023-09-01 02:51:00,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:51:00,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:51:00,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:51:00,317 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:51:00,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 02:51:00,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:51:00,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:51:00,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 02:51:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:51:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:51:01,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:51:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:51:04,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681082338] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:51:04,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:51:04,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 28 [2023-09-01 02:51:04,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432021842] [2023-09-01 02:51:04,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:51:04,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 02:51:04,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:51:04,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 02:51:04,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2023-09-01 02:51:04,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-09-01 02:51:04,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 2323 transitions, 58205 flow. Second operand has 30 states, 30 states have (on average 67.96666666666667) internal successors, (2039), 30 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:04,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:51:04,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-09-01 02:51:04,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:51:39,082 INFO L130 PetriNetUnfolder]: 6143/10838 cut-off events. [2023-09-01 02:51:39,082 INFO L131 PetriNetUnfolder]: For 272491/272491 co-relation queries the response was YES. [2023-09-01 02:51:39,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112570 conditions, 10838 events. 6143/10838 cut-off events. For 272491/272491 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 81247 event pairs, 34 based on Foata normal form. 26/10864 useless extension candidates. Maximal degree in co-relation 112424. Up to 3982 conditions per place. [2023-09-01 02:51:39,237 INFO L137 encePairwiseOnDemand]: 172/182 looper letters, 1028 selfloop transitions, 1815 changer transitions 155/2998 dead transitions. [2023-09-01 02:51:39,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 2998 transitions, 77745 flow [2023-09-01 02:51:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-09-01 02:51:39,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-09-01 02:51:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 6430 transitions. [2023-09-01 02:51:39,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38823813549088276 [2023-09-01 02:51:39,245 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 6430 transitions. [2023-09-01 02:51:39,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 6430 transitions. [2023-09-01 02:51:39,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:51:39,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 6430 transitions. [2023-09-01 02:51:39,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 70.65934065934066) internal successors, (6430), 91 states have internal predecessors, (6430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:39,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 182.0) internal successors, (16744), 92 states have internal predecessors, (16744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:39,416 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 182.0) internal successors, (16744), 92 states have internal predecessors, (16744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:39,416 INFO L175 Difference]: Start difference. First operand has 543 places, 2323 transitions, 58205 flow. Second operand 91 states and 6430 transitions. [2023-09-01 02:51:39,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 2998 transitions, 77745 flow [2023-09-01 02:51:45,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 2998 transitions, 75576 flow, removed 1054 selfloop flow, removed 17 redundant places. [2023-09-01 02:51:45,818 INFO L231 Difference]: Finished difference. Result has 630 places, 2588 transitions, 69822 flow [2023-09-01 02:51:45,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=57241, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1548, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=69822, PETRI_PLACES=630, PETRI_TRANSITIONS=2588} [2023-09-01 02:51:45,819 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 599 predicate places. [2023-09-01 02:51:45,820 INFO L495 AbstractCegarLoop]: Abstraction has has 630 places, 2588 transitions, 69822 flow [2023-09-01 02:51:45,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 67.96666666666667) internal successors, (2039), 30 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:45,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:51:45,820 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:51:45,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 02:51:46,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:51:46,021 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:51:46,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:51:46,021 INFO L85 PathProgramCache]: Analyzing trace with hash -27053838, now seen corresponding path program 11 times [2023-09-01 02:51:46,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:51:46,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857159850] [2023-09-01 02:51:46,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:51:46,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:51:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:51:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:51:47,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:51:47,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857159850] [2023-09-01 02:51:47,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857159850] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:51:47,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730772354] [2023-09-01 02:51:47,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:51:47,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:51:47,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:51:47,517 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:51:47,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 02:51:47,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-09-01 02:51:47,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:51:47,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 02:51:47,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:51:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:51:48,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:51:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:51:51,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730772354] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:51:51,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:51:51,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 30 [2023-09-01 02:51:51,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093926913] [2023-09-01 02:51:51,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:51:51,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 02:51:51,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:51:51,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 02:51:51,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2023-09-01 02:51:52,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-09-01 02:51:52,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 630 places, 2588 transitions, 69822 flow. Second operand has 32 states, 32 states have (on average 67.84375) internal successors, (2171), 32 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:51:52,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:51:52,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-09-01 02:51:52,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:52:36,933 INFO L130 PetriNetUnfolder]: 7007/12396 cut-off events. [2023-09-01 02:52:36,934 INFO L131 PetriNetUnfolder]: For 287055/287055 co-relation queries the response was YES. [2023-09-01 02:52:37,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132320 conditions, 12396 events. 7007/12396 cut-off events. For 287055/287055 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 95217 event pairs, 2 based on Foata normal form. 20/12416 useless extension candidates. Maximal degree in co-relation 132159. Up to 2856 conditions per place. [2023-09-01 02:52:37,162 INFO L137 encePairwiseOnDemand]: 171/182 looper letters, 247 selfloop transitions, 3081 changer transitions 112/3440 dead transitions. [2023-09-01 02:52:37,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 722 places, 3440 transitions, 94362 flow [2023-09-01 02:52:37,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-09-01 02:52:37,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2023-09-01 02:52:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 7449 transitions. [2023-09-01 02:52:37,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861185983827493 [2023-09-01 02:52:37,171 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 7449 transitions. [2023-09-01 02:52:37,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 7449 transitions. [2023-09-01 02:52:37,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:52:37,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 7449 transitions. [2023-09-01 02:52:37,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 70.27358490566037) internal successors, (7449), 106 states have internal predecessors, (7449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:37,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 182.0) internal successors, (19474), 107 states have internal predecessors, (19474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:37,201 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 182.0) internal successors, (19474), 107 states have internal predecessors, (19474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:37,201 INFO L175 Difference]: Start difference. First operand has 630 places, 2588 transitions, 69822 flow. Second operand 106 states and 7449 transitions. [2023-09-01 02:52:37,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 722 places, 3440 transitions, 94362 flow [2023-09-01 02:52:45,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 3440 transitions, 93780 flow, removed 246 selfloop flow, removed 22 redundant places. [2023-09-01 02:52:45,511 INFO L231 Difference]: Finished difference. Result has 716 places, 3170 transitions, 92665 flow [2023-09-01 02:52:45,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=69415, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=92665, PETRI_PLACES=716, PETRI_TRANSITIONS=3170} [2023-09-01 02:52:45,513 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 685 predicate places. [2023-09-01 02:52:45,513 INFO L495 AbstractCegarLoop]: Abstraction has has 716 places, 3170 transitions, 92665 flow [2023-09-01 02:52:45,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 67.84375) internal successors, (2171), 32 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:45,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:52:45,514 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:52:45,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 02:52:45,717 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,SelfDestructingSolverStorable20 [2023-09-01 02:52:45,717 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:52:45,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:52:45,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1293874632, now seen corresponding path program 12 times [2023-09-01 02:52:45,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:52:45,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57204400] [2023-09-01 02:52:45,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:52:45,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:52:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:52:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:52:46,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:52:46,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57204400] [2023-09-01 02:52:46,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57204400] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:52:46,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56076116] [2023-09-01 02:52:46,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 02:52:46,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:52:46,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:52:46,381 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:52:46,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 02:52:46,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 02:52:46,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:52:46,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 02:52:46,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:52:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:52:47,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:52:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:52:48,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56076116] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:52:48,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:52:48,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-09-01 02:52:48,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452844908] [2023-09-01 02:52:48,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:52:48,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 02:52:48,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:52:48,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 02:52:48,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2023-09-01 02:52:49,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 182 [2023-09-01 02:52:49,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 716 places, 3170 transitions, 92665 flow. Second operand has 28 states, 28 states have (on average 69.10714285714286) internal successors, (1935), 28 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:52:49,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:52:49,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 182 [2023-09-01 02:52:49,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:53:28,778 INFO L130 PetriNetUnfolder]: 8407/14903 cut-off events. [2023-09-01 02:53:28,779 INFO L131 PetriNetUnfolder]: For 374432/374432 co-relation queries the response was YES. [2023-09-01 02:53:28,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172875 conditions, 14903 events. 8407/14903 cut-off events. For 374432/374432 co-relation queries the response was YES. Maximal size of possible extension queue 856. Compared 117919 event pairs, 127 based on Foata normal form. 29/14932 useless extension candidates. Maximal degree in co-relation 172706. Up to 3993 conditions per place. [2023-09-01 02:53:29,025 INFO L137 encePairwiseOnDemand]: 171/182 looper letters, 1171 selfloop transitions, 2843 changer transitions 190/4204 dead transitions. [2023-09-01 02:53:29,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 4204 transitions, 126866 flow [2023-09-01 02:53:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-09-01 02:53:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2023-09-01 02:53:29,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 6603 transitions. [2023-09-01 02:53:29,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943502150023889 [2023-09-01 02:53:29,032 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 6603 transitions. [2023-09-01 02:53:29,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 6603 transitions. [2023-09-01 02:53:29,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:53:29,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 6603 transitions. [2023-09-01 02:53:29,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 71.77173913043478) internal successors, (6603), 92 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:53:29,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 182.0) internal successors, (16926), 93 states have internal predecessors, (16926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:53:29,051 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 182.0) internal successors, (16926), 93 states have internal predecessors, (16926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:53:29,051 INFO L175 Difference]: Start difference. First operand has 716 places, 3170 transitions, 92665 flow. Second operand 92 states and 6603 transitions. [2023-09-01 02:53:29,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 4204 transitions, 126866 flow [2023-09-01 02:53:42,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 771 places, 4204 transitions, 125564 flow, removed 606 selfloop flow, removed 22 redundant places. [2023-09-01 02:53:43,042 INFO L231 Difference]: Finished difference. Result has 823 places, 3820 transitions, 119050 flow [2023-09-01 02:53:43,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=91842, PETRI_DIFFERENCE_MINUEND_PLACES=680, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=119050, PETRI_PLACES=823, PETRI_TRANSITIONS=3820} [2023-09-01 02:53:43,045 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 792 predicate places. [2023-09-01 02:53:43,045 INFO L495 AbstractCegarLoop]: Abstraction has has 823 places, 3820 transitions, 119050 flow [2023-09-01 02:53:43,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 69.10714285714286) internal successors, (1935), 28 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:53:43,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:53:43,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:53:43,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 02:53:43,246 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,SelfDestructingSolverStorable21 [2023-09-01 02:53:43,246 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:53:43,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:53:43,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1190431434, now seen corresponding path program 13 times [2023-09-01 02:53:43,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:53:43,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340811205] [2023-09-01 02:53:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:53:43,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:53:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:53:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 02:53:43,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:53:43,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340811205] [2023-09-01 02:53:43,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340811205] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:53:43,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:53:43,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:53:43,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575707306] [2023-09-01 02:53:43,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:53:43,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:53:43,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:53:43,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:53:43,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:53:43,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 182 [2023-09-01 02:53:43,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 823 places, 3820 transitions, 119050 flow. Second operand has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:53:43,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:53:43,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 182 [2023-09-01 02:53:43,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:53:57,110 INFO L130 PetriNetUnfolder]: 7940/13829 cut-off events. [2023-09-01 02:53:57,110 INFO L131 PetriNetUnfolder]: For 413390/413390 co-relation queries the response was YES. [2023-09-01 02:53:57,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174351 conditions, 13829 events. 7940/13829 cut-off events. For 413390/413390 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 106523 event pairs, 1784 based on Foata normal form. 116/13945 useless extension candidates. Maximal degree in co-relation 174137. Up to 8057 conditions per place. [2023-09-01 02:53:57,384 INFO L137 encePairwiseOnDemand]: 177/182 looper letters, 2795 selfloop transitions, 1082 changer transitions 0/3877 dead transitions. [2023-09-01 02:53:57,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 809 places, 3877 transitions, 128582 flow [2023-09-01 02:53:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:53:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:53:57,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2023-09-01 02:53:57,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2023-09-01 02:53:57,386 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2023-09-01 02:53:57,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2023-09-01 02:53:57,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:53:57,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2023-09-01 02:53:57,387 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) [2023-09-01 02:53:57,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:53:57,388 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:53:57,388 INFO L175 Difference]: Start difference. First operand has 823 places, 3820 transitions, 119050 flow. Second operand 5 states and 416 transitions. [2023-09-01 02:53:57,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 809 places, 3877 transitions, 128582 flow [2023-09-01 02:54:12,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 3877 transitions, 127860 flow, removed 330 selfloop flow, removed 24 redundant places. [2023-09-01 02:54:12,407 INFO L231 Difference]: Finished difference. Result has 787 places, 3815 transitions, 121765 flow [2023-09-01 02:54:12,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=118186, PETRI_DIFFERENCE_MINUEND_PLACES=781, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121765, PETRI_PLACES=787, PETRI_TRANSITIONS=3815} [2023-09-01 02:54:12,410 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 756 predicate places. [2023-09-01 02:54:12,410 INFO L495 AbstractCegarLoop]: Abstraction has has 787 places, 3815 transitions, 121765 flow [2023-09-01 02:54:12,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:54:12,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:54:12,411 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:54:12,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 02:54:12,411 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:54:12,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:54:12,412 INFO L85 PathProgramCache]: Analyzing trace with hash -931906834, now seen corresponding path program 14 times [2023-09-01 02:54:12,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:54:12,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129962592] [2023-09-01 02:54:12,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:54:12,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:54:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:54:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:54:13,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:54:13,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129962592] [2023-09-01 02:54:13,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129962592] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:54:13,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956868881] [2023-09-01 02:54:13,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:54:13,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:54:13,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:54:13,109 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:54:13,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 02:54:13,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:54:13,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:54:13,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 02:54:13,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:54:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:54:14,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:54:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:54:15,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956868881] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:54:15,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:54:15,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-09-01 02:54:15,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877290603] [2023-09-01 02:54:15,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:54:15,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 02:54:15,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:54:15,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 02:54:15,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2023-09-01 02:54:15,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 182 [2023-09-01 02:54:15,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 3815 transitions, 121765 flow. Second operand has 34 states, 34 states have (on average 67.73529411764706) internal successors, (2303), 34 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:54:15,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:54:15,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 182 [2023-09-01 02:54:15,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:54:45,637 INFO L130 PetriNetUnfolder]: 8607/15008 cut-off events. [2023-09-01 02:54:45,637 INFO L131 PetriNetUnfolder]: For 486900/486900 co-relation queries the response was YES. [2023-09-01 02:54:45,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191354 conditions, 15008 events. 8607/15008 cut-off events. For 486900/486900 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 117269 event pairs, 42 based on Foata normal form. 54/15062 useless extension candidates. Maximal degree in co-relation 191152. Up to 3556 conditions per place. [2023-09-01 02:54:45,910 INFO L137 encePairwiseOnDemand]: 172/182 looper letters, 104 selfloop transitions, 2815 changer transitions 1434/4353 dead transitions. [2023-09-01 02:54:45,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 4353 transitions, 144930 flow [2023-09-01 02:54:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-09-01 02:54:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-09-01 02:54:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4494 transitions. [2023-09-01 02:54:45,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3858173076923077 [2023-09-01 02:54:45,915 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4494 transitions. [2023-09-01 02:54:45,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4494 transitions. [2023-09-01 02:54:45,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:54:45,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4494 transitions. [2023-09-01 02:54:45,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 70.21875) internal successors, (4494), 64 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:54:45,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 182.0) internal successors, (11830), 65 states have internal predecessors, (11830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:54:45,929 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 182.0) internal successors, (11830), 65 states have internal predecessors, (11830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:54:45,929 INFO L175 Difference]: Start difference. First operand has 787 places, 3815 transitions, 121765 flow. Second operand 64 states and 4494 transitions. [2023-09-01 02:54:45,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 850 places, 4353 transitions, 144930 flow [2023-09-01 02:55:02,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 848 places, 4353 transitions, 144619 flow, removed 152 selfloop flow, removed 2 redundant places. [2023-09-01 02:55:03,004 INFO L231 Difference]: Finished difference. Result has 854 places, 2854 transitions, 98552 flow [2023-09-01 02:55:03,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=121660, PETRI_DIFFERENCE_MINUEND_PLACES=785, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=98552, PETRI_PLACES=854, PETRI_TRANSITIONS=2854} [2023-09-01 02:55:03,008 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 823 predicate places. [2023-09-01 02:55:03,009 INFO L495 AbstractCegarLoop]: Abstraction has has 854 places, 2854 transitions, 98552 flow [2023-09-01 02:55:03,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 67.73529411764706) internal successors, (2303), 34 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:03,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:55:03,009 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:55:03,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 02:55:03,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:55:03,219 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 02:55:03,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:55:03,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1255571070, now seen corresponding path program 15 times [2023-09-01 02:55:03,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:55:03,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087629840] [2023-09-01 02:55:03,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:55:03,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:55:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:55:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:55:03,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:55:03,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087629840] [2023-09-01 02:55:03,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087629840] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:55:03,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593947291] [2023-09-01 02:55:03,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:55:03,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:55:03,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:55:03,404 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 02:55:03,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 02:55:03,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 02:55:03,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:55:03,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 02:55:03,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:55:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:55:03,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:55:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 02:55:03,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593947291] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:55:03,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:55:03,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 6] total 19 [2023-09-01 02:55:03,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560760726] [2023-09-01 02:55:03,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:55:03,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 02:55:03,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:55:03,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 02:55:03,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-09-01 02:55:03,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 182 [2023-09-01 02:55:03,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 854 places, 2854 transitions, 98552 flow. Second operand has 19 states, 19 states have (on average 73.57894736842105) internal successors, (1398), 19 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) [2023-09-01 02:55:03,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:55:03,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 182 [2023-09-01 02:55:03,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:55:11,022 INFO L130 PetriNetUnfolder]: 5166/8669 cut-off events. [2023-09-01 02:55:11,022 INFO L131 PetriNetUnfolder]: For 261128/261128 co-relation queries the response was YES. [2023-09-01 02:55:11,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124877 conditions, 8669 events. 5166/8669 cut-off events. For 261128/261128 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 59498 event pairs, 1 based on Foata normal form. 80/8749 useless extension candidates. Maximal degree in co-relation 124669. Up to 4273 conditions per place. [2023-09-01 02:55:11,167 INFO L137 encePairwiseOnDemand]: 173/182 looper letters, 0 selfloop transitions, 0 changer transitions 2801/2801 dead transitions. [2023-09-01 02:55:11,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 2801 transitions, 102081 flow [2023-09-01 02:55:11,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 02:55:11,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 02:55:11,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1043 transitions. [2023-09-01 02:55:11,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40934065934065933 [2023-09-01 02:55:11,169 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1043 transitions. [2023-09-01 02:55:11,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1043 transitions. [2023-09-01 02:55:11,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:55:11,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1043 transitions. [2023-09-01 02:55:11,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 74.5) internal successors, (1043), 14 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:11,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 182.0) internal successors, (2730), 15 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:11,171 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 182.0) internal successors, (2730), 15 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:55:11,172 INFO L175 Difference]: Start difference. First operand has 854 places, 2854 transitions, 98552 flow. Second operand 14 states and 1043 transitions. [2023-09-01 02:55:11,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 715 places, 2801 transitions, 102081 flow [2023-09-01 02:55:19,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 2801 transitions, 89056 flow, removed 320 selfloop flow, removed 64 redundant places. [2023-09-01 02:55:19,829 INFO L231 Difference]: Finished difference. Result has 651 places, 0 transitions, 0 flow [2023-09-01 02:55:19,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=82878, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2767, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=0, PETRI_PLACES=651, PETRI_TRANSITIONS=0} [2023-09-01 02:55:19,830 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 620 predicate places. [2023-09-01 02:55:19,831 INFO L495 AbstractCegarLoop]: Abstraction has has 651 places, 0 transitions, 0 flow [2023-09-01 02:55:19,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 73.57894736842105) internal successors, (1398), 19 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) [2023-09-01 02:55:19,833 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 12 remaining) [2023-09-01 02:55:19,833 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 12 remaining) [2023-09-01 02:55:19,833 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2023-09-01 02:55:19,833 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-09-01 02:55:19,833 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2023-09-01 02:55:19,833 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2023-09-01 02:55:19,834 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 12 remaining) [2023-09-01 02:55:19,834 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 12 remaining) [2023-09-01 02:55:19,834 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2023-09-01 02:55:19,834 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2023-09-01 02:55:19,834 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 12 remaining) [2023-09-01 02:55:19,834 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 12 remaining) [2023-09-01 02:55:19,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 02:55:20,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:55:20,035 INFO L445 BasicCegarLoop]: Path program histogram: [15, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 02:55:20,038 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 02:55:20,038 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 02:55:20,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 02:55:20 BasicIcfg [2023-09-01 02:55:20,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 02:55:20,041 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 02:55:20,042 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 02:55:20,042 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 02:55:20,042 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:48:15" (3/4) ... [2023-09-01 02:55:20,044 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 02:55:20,047 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-09-01 02:55:20,047 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-09-01 02:55:20,050 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2023-09-01 02:55:20,050 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-09-01 02:55:20,050 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-09-01 02:55:20,050 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-09-01 02:55:20,082 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 02:55:20,082 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 02:55:20,083 INFO L158 Benchmark]: Toolchain (without parser) took 425293.20ms. Allocated memory was 79.7MB in the beginning and 4.6GB in the end (delta: 4.5GB). Free memory was 56.7MB in the beginning and 1.9GB in the end (delta: -1.8GB). Peak memory consumption was 2.7GB. Max. memory is 16.1GB. [2023-09-01 02:55:20,083 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 56.6MB. Free memory was 34.8MB in the beginning and 34.8MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:55:20,083 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.75ms. Allocated memory is still 79.7MB. Free memory was 56.4MB in the beginning and 45.5MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:55:20,083 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.69ms. Allocated memory is still 79.7MB. Free memory was 45.5MB in the beginning and 43.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 02:55:20,084 INFO L158 Benchmark]: Boogie Preprocessor took 43.15ms. Allocated memory is still 79.7MB. Free memory was 43.9MB in the beginning and 42.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:55:20,084 INFO L158 Benchmark]: RCFGBuilder took 405.46ms. Allocated memory is still 79.7MB. Free memory was 42.3MB in the beginning and 49.2MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 02:55:20,088 INFO L158 Benchmark]: TraceAbstraction took 424487.26ms. Allocated memory was 79.7MB in the beginning and 4.6GB in the end (delta: 4.5GB). Free memory was 48.6MB in the beginning and 1.9GB in the end (delta: -1.8GB). Peak memory consumption was 3.1GB. Max. memory is 16.1GB. [2023-09-01 02:55:20,088 INFO L158 Benchmark]: Witness Printer took 40.78ms. Allocated memory is still 4.6GB. Free memory was 1.9GB in the beginning and 1.9GB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-09-01 02:55:20,089 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 56.6MB. Free memory was 34.8MB in the beginning and 34.8MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 266.75ms. Allocated memory is still 79.7MB. Free memory was 56.4MB in the beginning and 45.5MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.69ms. Allocated memory is still 79.7MB. Free memory was 45.5MB in the beginning and 43.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.15ms. Allocated memory is still 79.7MB. Free memory was 43.9MB in the beginning and 42.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 405.46ms. Allocated memory is still 79.7MB. Free memory was 42.3MB in the beginning and 49.2MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 424487.26ms. Allocated memory was 79.7MB in the beginning and 4.6GB in the end (delta: 4.5GB). Free memory was 48.6MB in the beginning and 1.9GB in the end (delta: -1.8GB). Peak memory consumption was 3.1GB. Max. memory is 16.1GB. * Witness Printer took 40.78ms. Allocated memory is still 4.6GB. Free memory was 1.9GB in the beginning and 1.9GB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 90 PlacesBefore, 31 PlacesAfterwards, 89 TransitionsBefore, 26 TransitionsAfterwards, 532 CoEnabledTransitionPairs, 7 FixpointIterations, 55 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 87 TotalNumberOfCompositions, 987 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 820, independent: 791, independent conditional: 0, independent unconditional: 791, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 273, independent: 269, independent conditional: 0, independent unconditional: 269, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 820, independent: 522, independent conditional: 0, independent unconditional: 522, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 273, unknown conditional: 0, unknown unconditional: 273] , Statistics on independence cache: Total cache size (in pairs): 51, Positive cache size: 48, Positive conditional cache size: 0, Positive unconditional cache size: 48, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 95]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 78]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 107 locations, 12 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 424.4s, OverallIterations: 25, TraceHistogramMax: 3, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 373.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5901 SdHoareTripleChecker+Valid, 51.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5560 mSDsluCounter, 1124 SdHoareTripleChecker+Invalid, 48.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1046 mSDsCounter, 1146 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 22478 IncrementalHoareTripleChecker+Invalid, 23624 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1146 mSolverCounterUnsat, 78 mSDtfsCounter, 22478 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1443 GetRequests, 312 SyntacticMatches, 14 SemanticMatches, 1117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33223 ImplicationChecksByTransitivity, 182.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=121765occurred in iteration=23, InterpolantAutomatonStates: 960, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 42.3s InterpolantComputationTime, 676 NumberOfCodeBlocks, 670 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 880 ConstructedInterpolants, 0 QuantifiedInterpolants, 33596 SizeOfPredicates, 130 NumberOfNonLiveVariables, 2152 ConjunctsInSsa, 407 ConjunctsInUnsatCore, 53 InterpolantComputations, 12 PerfectInterpolantSequences, 47/296 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-09-01 02:55:20,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE