./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.opt.i --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/pthread-wmm/safe016_rmo.opt.i -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 e946e8dea30db7efb52f6f71a24f03cd895152f9df0eae9d8d1291d135f806ee --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 [2023-08-31 23:36:45,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 23:36:45,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 23:36:45,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 23:36:45,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 23:36:45,699 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 23:36:45,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 23:36:45,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 23:36:45,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 23:36:45,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 23:36:45,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 23:36:45,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 23:36:45,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 23:36:45,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 23:36:45,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 23:36:45,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 23:36:45,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 23:36:45,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 23:36:45,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 23:36:45,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 23:36:45,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 23:36:45,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 23:36:45,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 23:36:45,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 23:36:45,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 23:36:45,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 23:36:45,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 23:36:45,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 23:36:45,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 23:36:45,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 23:36:45,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 23:36:45,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 23:36:45,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 23:36:45,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 23:36:45,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 23:36:45,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 23:36:45,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 23:36:45,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 23:36:45,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 23:36:45,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 23:36:45,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 23:36:45,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 23:36:45,799 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 23:36:45,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 23:36:45,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 23:36:45,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 23:36:45,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 23:36:45,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 23:36:45,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 23:36:45,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 23:36:45,807 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 23:36:45,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 23:36:45,808 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 23:36:45,808 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 23:36:45,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 23:36:45,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 23:36:45,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 23:36:45,809 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 23:36:45,810 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 23:36:45,810 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 23:36:45,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 23:36:45,810 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 23:36:45,810 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 23:36:45,811 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 23:36:45,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 23:36:45,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 23:36:45,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 23:36:45,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 23:36:45,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 23:36:45,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 23:36:45,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 23:36:45,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 23:36:45,812 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 23:36:45,813 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 23:36:45,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 23:36:45,813 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 23:36:45,813 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e946e8dea30db7efb52f6f71a24f03cd895152f9df0eae9d8d1291d135f806ee Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 23:36:46,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 23:36:46,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 23:36:46,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 23:36:46,121 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 23:36:46,121 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 23:36:46,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.opt.i [2023-08-31 23:36:47,284 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 23:36:47,542 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 23:36:47,543 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_rmo.opt.i [2023-08-31 23:36:47,555 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc3c2fb5f/6722f1ee6181494ca01117b9b487ae90/FLAG77ae4e338 [2023-08-31 23:36:47,566 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc3c2fb5f/6722f1ee6181494ca01117b9b487ae90 [2023-08-31 23:36:47,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 23:36:47,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 23:36:47,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 23:36:47,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 23:36:47,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 23:36:47,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 11:36:47" (1/1) ... [2023-08-31 23:36:47,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3765ceb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:36:47, skipping insertion in model container [2023-08-31 23:36:47,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 11:36:47" (1/1) ... [2023-08-31 23:36:47,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 23:36:47,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 23:36:47,790 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_rmo.opt.i[949,962] [2023-08-31 23:36:48,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 23:36:48,061 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 23:36:48,073 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_rmo.opt.i[949,962] [2023-08-31 23:36:48,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 23:36:48,177 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 23:36:48,177 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 23:36:48,183 INFO L208 MainTranslator]: Completed translation [2023-08-31 23:36:48,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:36:48 WrapperNode [2023-08-31 23:36:48,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 23:36:48,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 23:36:48,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 23:36:48,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 23:36:48,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:36:48" (1/1) ... [2023-08-31 23:36:48,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:36:48" (1/1) ... [2023-08-31 23:36:48,260 INFO L138 Inliner]: procedures = 177, calls = 89, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 184 [2023-08-31 23:36:48,260 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 23:36:48,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 23:36:48,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 23:36:48,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 23:36:48,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:36:48" (1/1) ... [2023-08-31 23:36:48,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:36:48" (1/1) ... [2023-08-31 23:36:48,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:36:48" (1/1) ... [2023-08-31 23:36:48,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:36:48" (1/1) ... [2023-08-31 23:36:48,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:36:48" (1/1) ... [2023-08-31 23:36:48,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:36:48" (1/1) ... [2023-08-31 23:36:48,309 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:36:48" (1/1) ... [2023-08-31 23:36:48,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:36:48" (1/1) ... [2023-08-31 23:36:48,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 23:36:48,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 23:36:48,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 23:36:48,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 23:36:48,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:36:48" (1/1) ... [2023-08-31 23:36:48,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 23:36:48,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 23:36:48,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 23:36:48,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 23:36:48,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 23:36:48,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 23:36:48,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 23:36:48,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 23:36:48,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 23:36:48,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 23:36:48,387 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-31 23:36:48,387 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-31 23:36:48,387 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-31 23:36:48,387 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-31 23:36:48,387 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-31 23:36:48,387 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-31 23:36:48,388 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-31 23:36:48,388 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-31 23:36:48,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 23:36:48,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 23:36:48,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 23:36:48,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 23:36:48,390 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 23:36:48,546 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 23:36:48,547 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 23:36:49,036 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 23:36:49,502 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 23:36:49,503 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-31 23:36:49,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 11:36:49 BoogieIcfgContainer [2023-08-31 23:36:49,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 23:36:49,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 23:36:49,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 23:36:49,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 23:36:49,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 11:36:47" (1/3) ... [2023-08-31 23:36:49,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee655cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 11:36:49, skipping insertion in model container [2023-08-31 23:36:49,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:36:48" (2/3) ... [2023-08-31 23:36:49,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee655cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 11:36:49, skipping insertion in model container [2023-08-31 23:36:49,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 11:36:49" (3/3) ... [2023-08-31 23:36:49,513 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_rmo.opt.i [2023-08-31 23:36:49,528 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 23:36:49,529 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 60 error locations. [2023-08-31 23:36:49,529 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 23:36:49,667 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 23:36:49,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 206 transitions, 432 flow [2023-08-31 23:36:49,817 INFO L130 PetriNetUnfolder]: 2/202 cut-off events. [2023-08-31 23:36:49,818 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 23:36:49,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 202 events. 2/202 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 329 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2023-08-31 23:36:49,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 206 transitions, 432 flow [2023-08-31 23:36:49,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 202 transitions, 416 flow [2023-08-31 23:36:49,833 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 23:36:49,841 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 202 transitions, 416 flow [2023-08-31 23:36:49,843 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 202 transitions, 416 flow [2023-08-31 23:36:49,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 202 transitions, 416 flow [2023-08-31 23:36:49,897 INFO L130 PetriNetUnfolder]: 2/202 cut-off events. [2023-08-31 23:36:49,898 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 23:36:49,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 202 events. 2/202 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 328 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2023-08-31 23:36:49,906 INFO L119 LiptonReduction]: Number of co-enabled transitions 10002 [2023-08-31 23:36:57,945 INFO L134 LiptonReduction]: Checked pairs total: 58440 [2023-08-31 23:36:57,945 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-08-31 23:36:57,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 23:36:57,963 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;@3fe0f35b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 23:36:57,964 INFO L358 AbstractCegarLoop]: Starting to check reachability of 96 error locations. [2023-08-31 23:36:57,965 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-31 23:36:57,965 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 23:36:57,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:36:57,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 23:36:57,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2023-08-31 23:36:57,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:36:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1194, now seen corresponding path program 1 times [2023-08-31 23:36:57,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:36:57,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970509158] [2023-08-31 23:36:57,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:36:57,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:36:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:36:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:36:58,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:36:58,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970509158] [2023-08-31 23:36:58,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970509158] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:36:58,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:36:58,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 23:36:58,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207701461] [2023-08-31 23:36:58,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:36:58,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 23:36:58,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:36:58,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 23:36:58,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 23:36:58,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 362 [2023-08-31 23:36:58,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 92 transitions, 196 flow. Second operand has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:36:58,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:36:58,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 362 [2023-08-31 23:36:58,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:37:49,041 INFO L130 PetriNetUnfolder]: 407146/524464 cut-off events. [2023-08-31 23:37:49,041 INFO L131 PetriNetUnfolder]: For 881/881 co-relation queries the response was YES. [2023-08-31 23:37:49,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1050379 conditions, 524464 events. 407146/524464 cut-off events. For 881/881 co-relation queries the response was YES. Maximal size of possible extension queue 30988. Compared 3829579 event pairs, 407146 based on Foata normal form. 0/203849 useless extension candidates. Maximal degree in co-relation 1050367. Up to 524132 conditions per place. [2023-08-31 23:37:52,108 INFO L137 encePairwiseOnDemand]: 334/362 looper letters, 58 selfloop transitions, 0 changer transitions 0/64 dead transitions. [2023-08-31 23:37:52,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 64 transitions, 256 flow [2023-08-31 23:37:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 23:37:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 23:37:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 378 transitions. [2023-08-31 23:37:52,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5220994475138122 [2023-08-31 23:37:52,122 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 378 transitions. [2023-08-31 23:37:52,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 378 transitions. [2023-08-31 23:37:52,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:37:52,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 378 transitions. [2023-08-31 23:37:52,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 189.0) internal successors, (378), 2 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:37:52,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:37:52,135 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:37:52,136 INFO L175 Difference]: Start difference. First operand has 105 places, 92 transitions, 196 flow. Second operand 2 states and 378 transitions. [2023-08-31 23:37:52,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 64 transitions, 256 flow [2023-08-31 23:37:52,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 64 transitions, 252 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 23:37:52,169 INFO L231 Difference]: Finished difference. Result has 74 places, 64 transitions, 136 flow [2023-08-31 23:37:52,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=136, PETRI_PLACES=74, PETRI_TRANSITIONS=64} [2023-08-31 23:37:52,173 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -31 predicate places. [2023-08-31 23:37:52,173 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 64 transitions, 136 flow [2023-08-31 23:37:52,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:37:52,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:37:52,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 23:37:52,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 23:37:52,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2023-08-31 23:37:52,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:37:52,175 INFO L85 PathProgramCache]: Analyzing trace with hash 36540647, now seen corresponding path program 1 times [2023-08-31 23:37:52,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:37:52,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264856997] [2023-08-31 23:37:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:37:52,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:37:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:37:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:37:52,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:37:52,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264856997] [2023-08-31 23:37:52,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264856997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:37:52,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:37:52,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 23:37:52,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296540925] [2023-08-31 23:37:52,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:37:52,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:37:52,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:37:52,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:37:52,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:37:52,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 362 [2023-08-31 23:37:52,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:37:52,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:37:52,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 362 [2023-08-31 23:37:52,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:38:03,343 INFO L130 PetriNetUnfolder]: 89352/116680 cut-off events. [2023-08-31 23:38:03,343 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 23:38:03,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233872 conditions, 116680 events. 89352/116680 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6090. Compared 749527 event pairs, 89352 based on Foata normal form. 4525/67669 useless extension candidates. Maximal degree in co-relation 233869. Up to 116503 conditions per place. [2023-08-31 23:38:03,951 INFO L137 encePairwiseOnDemand]: 347/362 looper letters, 44 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-31 23:38:03,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 50 transitions, 198 flow [2023-08-31 23:38:03,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:38:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:38:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-08-31 23:38:03,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44935543278084716 [2023-08-31 23:38:03,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-08-31 23:38:03,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-08-31 23:38:03,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:38:03,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-08-31 23:38:03,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:03,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:03,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:03,965 INFO L175 Difference]: Start difference. First operand has 74 places, 64 transitions, 136 flow. Second operand 3 states and 488 transitions. [2023-08-31 23:38:03,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 50 transitions, 198 flow [2023-08-31 23:38:03,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 50 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 23:38:03,967 INFO L231 Difference]: Finished difference. Result has 62 places, 50 transitions, 110 flow [2023-08-31 23:38:03,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=62, PETRI_TRANSITIONS=50} [2023-08-31 23:38:03,968 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -43 predicate places. [2023-08-31 23:38:03,968 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 50 transitions, 110 flow [2023-08-31 23:38:03,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:03,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:38:03,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 23:38:03,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 23:38:03,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2023-08-31 23:38:03,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:38:03,972 INFO L85 PathProgramCache]: Analyzing trace with hash 36540646, now seen corresponding path program 1 times [2023-08-31 23:38:03,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:38:03,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256431358] [2023-08-31 23:38:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:38:03,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:38:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:38:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:38:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:38:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256431358] [2023-08-31 23:38:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256431358] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:38:04,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:38:04,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 23:38:04,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777265819] [2023-08-31 23:38:04,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:38:04,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:38:04,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:38:04,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:38:04,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:38:04,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 362 [2023-08-31 23:38:04,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 50 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 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) [2023-08-31 23:38:04,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:38:04,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 362 [2023-08-31 23:38:04,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:38:10,954 INFO L130 PetriNetUnfolder]: 62741/88321 cut-off events. [2023-08-31 23:38:10,955 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 23:38:11,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175655 conditions, 88321 events. 62741/88321 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4969. Compared 630121 event pairs, 34293 based on Foata normal form. 0/64542 useless extension candidates. Maximal degree in co-relation 175651. Up to 46487 conditions per place. [2023-08-31 23:38:11,353 INFO L137 encePairwiseOnDemand]: 335/362 looper letters, 48 selfloop transitions, 13 changer transitions 0/64 dead transitions. [2023-08-31 23:38:11,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 260 flow [2023-08-31 23:38:11,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:38:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:38:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-08-31 23:38:11,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44751381215469616 [2023-08-31 23:38:11,355 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-08-31 23:38:11,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-08-31 23:38:11,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:38:11,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-08-31 23:38:11,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:11,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:11,359 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:11,359 INFO L175 Difference]: Start difference. First operand has 62 places, 50 transitions, 110 flow. Second operand 3 states and 486 transitions. [2023-08-31 23:38:11,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 260 flow [2023-08-31 23:38:11,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 259 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 23:38:11,361 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 221 flow [2023-08-31 23:38:11,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2023-08-31 23:38:11,362 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -43 predicate places. [2023-08-31 23:38:11,362 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 221 flow [2023-08-31 23:38:11,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 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) [2023-08-31 23:38:11,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:38:11,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:38:11,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 23:38:11,363 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2023-08-31 23:38:11,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:38:11,364 INFO L85 PathProgramCache]: Analyzing trace with hash -913538373, now seen corresponding path program 1 times [2023-08-31 23:38:11,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:38:11,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255400186] [2023-08-31 23:38:11,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:38:11,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:38:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:38:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:38:12,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:38:12,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255400186] [2023-08-31 23:38:12,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255400186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:38:12,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:38:12,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 23:38:12,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21327996] [2023-08-31 23:38:12,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:38:12,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:38:12,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:38:12,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:38:12,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:38:12,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 362 [2023-08-31 23:38:12,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:12,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:38:12,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 362 [2023-08-31 23:38:12,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:38:20,614 INFO L130 PetriNetUnfolder]: 73321/101541 cut-off events. [2023-08-31 23:38:20,615 INFO L131 PetriNetUnfolder]: For 34390/34923 co-relation queries the response was YES. [2023-08-31 23:38:20,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291688 conditions, 101541 events. 73321/101541 cut-off events. For 34390/34923 co-relation queries the response was YES. Maximal size of possible extension queue 4483. Compared 692984 event pairs, 28533 based on Foata normal form. 90/87067 useless extension candidates. Maximal degree in co-relation 291683. Up to 94846 conditions per place. [2023-08-31 23:38:21,204 INFO L137 encePairwiseOnDemand]: 356/362 looper letters, 81 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2023-08-31 23:38:21,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 90 transitions, 521 flow [2023-08-31 23:38:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:38:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:38:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-31 23:38:21,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622467771639042 [2023-08-31 23:38:21,208 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-31 23:38:21,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-31 23:38:21,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:38:21,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-31 23:38:21,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:21,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:21,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:21,213 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 221 flow. Second operand 3 states and 502 transitions. [2023-08-31 23:38:21,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 90 transitions, 521 flow [2023-08-31 23:38:21,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 477 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 23:38:21,815 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 229 flow [2023-08-31 23:38:21,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2023-08-31 23:38:21,816 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -42 predicate places. [2023-08-31 23:38:21,816 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 229 flow [2023-08-31 23:38:21,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:21,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:38:21,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:38:21,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 23:38:21,817 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2023-08-31 23:38:21,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:38:21,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1745080692, now seen corresponding path program 1 times [2023-08-31 23:38:21,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:38:21,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710661225] [2023-08-31 23:38:21,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:38:21,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:38:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:38:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:38:22,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:38:22,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710661225] [2023-08-31 23:38:22,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710661225] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:38:22,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:38:22,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 23:38:22,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564446752] [2023-08-31 23:38:22,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:38:22,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 23:38:22,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:38:22,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 23:38:22,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 23:38:22,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 362 [2023-08-31 23:38:22,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:22,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:38:22,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 362 [2023-08-31 23:38:22,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:38:30,673 INFO L130 PetriNetUnfolder]: 72856/101003 cut-off events. [2023-08-31 23:38:30,673 INFO L131 PetriNetUnfolder]: For 22095/22672 co-relation queries the response was YES. [2023-08-31 23:38:30,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278202 conditions, 101003 events. 72856/101003 cut-off events. For 22095/22672 co-relation queries the response was YES. Maximal size of possible extension queue 4475. Compared 698712 event pairs, 18656 based on Foata normal form. 148/76014 useless extension candidates. Maximal degree in co-relation 278196. Up to 92469 conditions per place. [2023-08-31 23:38:31,250 INFO L137 encePairwiseOnDemand]: 357/362 looper letters, 111 selfloop transitions, 6 changer transitions 0/122 dead transitions. [2023-08-31 23:38:31,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 122 transitions, 677 flow [2023-08-31 23:38:31,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 23:38:31,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 23:38:31,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 661 transitions. [2023-08-31 23:38:31,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564917127071823 [2023-08-31 23:38:31,252 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 661 transitions. [2023-08-31 23:38:31,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 661 transitions. [2023-08-31 23:38:31,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:38:31,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 661 transitions. [2023-08-31 23:38:31,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 165.25) internal successors, (661), 4 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:31,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 362.0) internal successors, (1810), 5 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:31,256 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 362.0) internal successors, (1810), 5 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:31,256 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 229 flow. Second operand 4 states and 661 transitions. [2023-08-31 23:38:31,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 122 transitions, 677 flow [2023-08-31 23:38:31,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 122 transitions, 673 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 23:38:31,269 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 253 flow [2023-08-31 23:38:31,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2023-08-31 23:38:31,270 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -39 predicate places. [2023-08-31 23:38:31,270 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 253 flow [2023-08-31 23:38:31,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:31,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:38:31,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:38:31,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 23:38:31,271 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2023-08-31 23:38:31,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:38:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1745080432, now seen corresponding path program 1 times [2023-08-31 23:38:31,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:38:31,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261743418] [2023-08-31 23:38:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:38:31,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:38:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:38:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:38:31,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:38:31,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261743418] [2023-08-31 23:38:31,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261743418] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:38:31,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:38:31,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 23:38:31,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893082222] [2023-08-31 23:38:31,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:38:31,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 23:38:31,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:38:31,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 23:38:31,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 23:38:31,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 362 [2023-08-31 23:38:31,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 253 flow. Second operand has 4 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:31,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:38:31,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 362 [2023-08-31 23:38:31,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:38:46,004 INFO L130 PetriNetUnfolder]: 117947/166003 cut-off events. [2023-08-31 23:38:46,004 INFO L131 PetriNetUnfolder]: For 51820/52969 co-relation queries the response was YES. [2023-08-31 23:38:46,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465126 conditions, 166003 events. 117947/166003 cut-off events. For 51820/52969 co-relation queries the response was YES. Maximal size of possible extension queue 8220. Compared 1258560 event pairs, 64267 based on Foata normal form. 0/122267 useless extension candidates. Maximal degree in co-relation 465119. Up to 86543 conditions per place. [2023-08-31 23:38:46,982 INFO L137 encePairwiseOnDemand]: 358/362 looper letters, 92 selfloop transitions, 6 changer transitions 0/105 dead transitions. [2023-08-31 23:38:46,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 105 transitions, 606 flow [2023-08-31 23:38:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 23:38:46,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 23:38:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 627 transitions. [2023-08-31 23:38:46,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4330110497237569 [2023-08-31 23:38:46,985 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 627 transitions. [2023-08-31 23:38:46,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 627 transitions. [2023-08-31 23:38:46,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:38:46,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 627 transitions. [2023-08-31 23:38:46,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:46,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 362.0) internal successors, (1810), 5 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:46,990 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 362.0) internal successors, (1810), 5 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:46,990 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 253 flow. Second operand 4 states and 627 transitions. [2023-08-31 23:38:46,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 105 transitions, 606 flow [2023-08-31 23:38:46,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 105 transitions, 597 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 23:38:47,001 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 268 flow [2023-08-31 23:38:47,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2023-08-31 23:38:47,002 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -37 predicate places. [2023-08-31 23:38:47,002 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 268 flow [2023-08-31 23:38:47,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:47,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:38:47,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:38:47,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 23:38:47,003 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2023-08-31 23:38:47,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:38:47,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1992803667, now seen corresponding path program 1 times [2023-08-31 23:38:47,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:38:47,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791815094] [2023-08-31 23:38:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:38:47,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:38:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:38:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:38:47,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:38:47,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791815094] [2023-08-31 23:38:47,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791815094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:38:47,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:38:47,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 23:38:47,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414912327] [2023-08-31 23:38:47,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:38:47,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:38:47,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:38:47,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:38:47,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:38:47,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 362 [2023-08-31 23:38:47,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:38:47,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:38:47,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 362 [2023-08-31 23:38:47,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:39:02,940 INFO L130 PetriNetUnfolder]: 127186/180508 cut-off events. [2023-08-31 23:39:02,940 INFO L131 PetriNetUnfolder]: For 74641/75897 co-relation queries the response was YES. [2023-08-31 23:39:03,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508267 conditions, 180508 events. 127186/180508 cut-off events. For 74641/75897 co-relation queries the response was YES. Maximal size of possible extension queue 9260. Compared 1409914 event pairs, 63682 based on Foata normal form. 570/139231 useless extension candidates. Maximal degree in co-relation 508259. Up to 145520 conditions per place. [2023-08-31 23:39:04,047 INFO L137 encePairwiseOnDemand]: 355/362 looper letters, 72 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2023-08-31 23:39:04,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 514 flow [2023-08-31 23:39:04,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:39:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:39:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-31 23:39:04,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429097605893186 [2023-08-31 23:39:04,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-31 23:39:04,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-31 23:39:04,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:39:04,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-31 23:39:04,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:39:04,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:39:04,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:39:04,053 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 268 flow. Second operand 3 states and 481 transitions. [2023-08-31 23:39:04,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 514 flow [2023-08-31 23:39:04,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 507 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 23:39:04,094 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 320 flow [2023-08-31 23:39:04,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2023-08-31 23:39:04,095 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -36 predicate places. [2023-08-31 23:39:04,095 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 320 flow [2023-08-31 23:39:04,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:39:04,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:39:04,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:39:04,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 23:39:04,096 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2023-08-31 23:39:04,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:39:04,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1448640914, now seen corresponding path program 2 times [2023-08-31 23:39:04,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:39:04,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559356845] [2023-08-31 23:39:04,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:39:04,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:39:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:39:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:39:04,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:39:04,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559356845] [2023-08-31 23:39:04,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559356845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:39:04,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:39:04,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 23:39:04,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710788303] [2023-08-31 23:39:04,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:39:04,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 23:39:04,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:39:04,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 23:39:04,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-31 23:39:04,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 362 [2023-08-31 23:39:04,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 23:39:04,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:39:04,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 362 [2023-08-31 23:39:04,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand