./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/safe027_power.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 3edc5a2d9ce2881b3565fd36253c94b9cf356a0dafd043fa3f9d27823541c09b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 03:17:33,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 03:17:33,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 03:17:33,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 03:17:33,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 03:17:33,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 03:17:33,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 03:17:33,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 03:17:33,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 03:17:33,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 03:17:33,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 03:17:33,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 03:17:33,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 03:17:33,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 03:17:33,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 03:17:33,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 03:17:33,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 03:17:33,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 03:17:33,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 03:17:33,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 03:17:33,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 03:17:33,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 03:17:33,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 03:17:33,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 03:17:33,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 03:17:33,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 03:17:33,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 03:17:33,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 03:17:33,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 03:17:33,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 03:17:33,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 03:17:33,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 03:17:33,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 03:17:33,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 03:17:33,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 03:17:33,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 03:17:33,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 03:17:33,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 03:17:33,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 03:17:33,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 03:17:33,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 03:17:33,780 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 03:17:33,811 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 03:17:33,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 03:17:33,812 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 03:17:33,813 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 03:17:33,814 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 03:17:33,814 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 03:17:33,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 03:17:33,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 03:17:33,815 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 03:17:33,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 03:17:33,816 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 03:17:33,816 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 03:17:33,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 03:17:33,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 03:17:33,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 03:17:33,817 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 03:17:33,817 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 03:17:33,817 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 03:17:33,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 03:17:33,818 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 03:17:33,818 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 03:17:33,818 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 03:17:33,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 03:17:33,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 03:17:33,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 03:17:33,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 03:17:33,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 03:17:33,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 03:17:33,820 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 03:17:33,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 03:17:33,820 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 03:17:33,821 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 03:17:33,821 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 03:17:33,821 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 03:17:33,821 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3edc5a2d9ce2881b3565fd36253c94b9cf356a0dafd043fa3f9d27823541c09b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 03:17:34,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 03:17:34,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 03:17:34,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 03:17:34,159 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 03:17:34,159 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 03:17:34,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i [2023-08-30 03:17:35,247 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 03:17:35,520 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 03:17:35,521 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i [2023-08-30 03:17:35,537 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf92872c4/14f9bd73fe864737a78997eb571b4ccb/FLAG4632a7c76 [2023-08-30 03:17:35,552 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf92872c4/14f9bd73fe864737a78997eb571b4ccb [2023-08-30 03:17:35,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 03:17:35,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 03:17:35,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 03:17:35,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 03:17:35,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 03:17:35,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:17:35" (1/1) ... [2023-08-30 03:17:35,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18e0e45c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:35, skipping insertion in model container [2023-08-30 03:17:35,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:17:35" (1/1) ... [2023-08-30 03:17:35,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 03:17:35,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 03:17:35,789 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/safe027_power.opt.i[994,1007] [2023-08-30 03:17:36,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 03:17:36,051 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 03:17:36,060 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/safe027_power.opt.i[994,1007] [2023-08-30 03:17:36,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 03:17:36,196 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 03:17:36,197 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 03:17:36,203 INFO L208 MainTranslator]: Completed translation [2023-08-30 03:17:36,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:36 WrapperNode [2023-08-30 03:17:36,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 03:17:36,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 03:17:36,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 03:17:36,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 03:17:36,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:36" (1/1) ... [2023-08-30 03:17:36,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:36" (1/1) ... [2023-08-30 03:17:36,284 INFO L138 Inliner]: procedures = 177, calls = 88, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 195 [2023-08-30 03:17:36,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 03:17:36,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 03:17:36,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 03:17:36,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 03:17:36,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:36" (1/1) ... [2023-08-30 03:17:36,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:36" (1/1) ... [2023-08-30 03:17:36,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:36" (1/1) ... [2023-08-30 03:17:36,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:36" (1/1) ... [2023-08-30 03:17:36,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:36" (1/1) ... [2023-08-30 03:17:36,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:36" (1/1) ... [2023-08-30 03:17:36,340 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:36" (1/1) ... [2023-08-30 03:17:36,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:36" (1/1) ... [2023-08-30 03:17:36,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 03:17:36,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 03:17:36,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 03:17:36,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 03:17:36,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:36" (1/1) ... [2023-08-30 03:17:36,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 03:17:36,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:17:36,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 03:17:36,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 03:17:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 03:17:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 03:17:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 03:17:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 03:17:36,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 03:17:36,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 03:17:36,420 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-30 03:17:36,420 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-30 03:17:36,420 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-30 03:17:36,420 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-30 03:17:36,420 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-30 03:17:36,420 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-30 03:17:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-30 03:17:36,421 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-30 03:17:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 03:17:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 03:17:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 03:17:36,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 03:17:36,423 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 03:17:36,613 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 03:17:36,614 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 03:17:37,135 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 03:17:37,708 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 03:17:37,708 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-30 03:17:37,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:17:37 BoogieIcfgContainer [2023-08-30 03:17:37,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 03:17:37,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 03:17:37,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 03:17:37,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 03:17:37,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:17:35" (1/3) ... [2023-08-30 03:17:37,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7edb35b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:17:37, skipping insertion in model container [2023-08-30 03:17:37,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:17:36" (2/3) ... [2023-08-30 03:17:37,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7edb35b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:17:37, skipping insertion in model container [2023-08-30 03:17:37,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:17:37" (3/3) ... [2023-08-30 03:17:37,719 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_power.opt.i [2023-08-30 03:17:37,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 03:17:37,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2023-08-30 03:17:37,735 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 03:17:37,894 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 03:17:37,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 204 transitions, 428 flow [2023-08-30 03:17:38,058 INFO L130 PetriNetUnfolder]: 2/200 cut-off events. [2023-08-30 03:17:38,059 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:17:38,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 200 events. 2/200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 321 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 139. Up to 2 conditions per place. [2023-08-30 03:17:38,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 204 transitions, 428 flow [2023-08-30 03:17:38,080 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 200 transitions, 412 flow [2023-08-30 03:17:38,085 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 03:17:38,097 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 200 transitions, 412 flow [2023-08-30 03:17:38,101 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 200 transitions, 412 flow [2023-08-30 03:17:38,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 200 transitions, 412 flow [2023-08-30 03:17:38,180 INFO L130 PetriNetUnfolder]: 2/200 cut-off events. [2023-08-30 03:17:38,180 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:17:38,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 200 events. 2/200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 329 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 139. Up to 2 conditions per place. [2023-08-30 03:17:38,188 INFO L119 LiptonReduction]: Number of co-enabled transitions 10216 [2023-08-30 03:17:48,648 INFO L134 LiptonReduction]: Checked pairs total: 58634 [2023-08-30 03:17:48,649 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-30 03:17:48,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 03:17:48,666 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;@6fd16cb5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 03:17:48,667 INFO L358 AbstractCegarLoop]: Starting to check reachability of 102 error locations. [2023-08-30 03:17:48,669 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 03:17:48,669 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:17:48,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:17:48,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 03:17:48,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2023-08-30 03:17:48,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:17:48,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1317, now seen corresponding path program 1 times [2023-08-30 03:17:48,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:17:48,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911158719] [2023-08-30 03:17:48,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:17:48,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:17:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:17:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:17:48,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:17:48,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911158719] [2023-08-30 03:17:48,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911158719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:17:48,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:17:48,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 03:17:48,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30740386] [2023-08-30 03:17:48,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:17:48,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 03:17:48,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:17:48,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 03:17:48,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 03:17:48,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 366 [2023-08-30 03:17:48,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 90 transitions, 192 flow. Second operand has 2 states, 2 states have (on average 142.5) internal successors, (285), 2 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:17:48,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:17:48,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 366 [2023-08-30 03:17:48,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:18:23,464 INFO L130 PetriNetUnfolder]: 257059/332408 cut-off events. [2023-08-30 03:18:23,464 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2023-08-30 03:18:23,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665916 conditions, 332408 events. 257059/332408 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 18243. Compared 2258419 event pairs, 257059 based on Foata normal form. 4320/149168 useless extension candidates. Maximal degree in co-relation 665904. Up to 332301 conditions per place. [2023-08-30 03:18:25,198 INFO L137 encePairwiseOnDemand]: 333/366 looper letters, 56 selfloop transitions, 0 changer transitions 0/57 dead transitions. [2023-08-30 03:18:25,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 238 flow [2023-08-30 03:18:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 03:18:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 03:18:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 373 transitions. [2023-08-30 03:18:25,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5095628415300546 [2023-08-30 03:18:25,210 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 373 transitions. [2023-08-30 03:18:25,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 373 transitions. [2023-08-30 03:18:25,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:18:25,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 373 transitions. [2023-08-30 03:18:25,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 186.5) internal successors, (373), 2 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:18:25,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:18:25,221 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:18:25,222 INFO L175 Difference]: Start difference. First operand has 102 places, 90 transitions, 192 flow. Second operand 2 states and 373 transitions. [2023-08-30 03:18:25,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 238 flow [2023-08-30 03:18:25,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 57 transitions, 234 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 03:18:25,313 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 122 flow [2023-08-30 03:18:25,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=122, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2023-08-30 03:18:25,317 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -35 predicate places. [2023-08-30 03:18:25,317 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 122 flow [2023-08-30 03:18:25,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 142.5) internal successors, (285), 2 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:18:25,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:18:25,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 03:18:25,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 03:18:25,319 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2023-08-30 03:18:25,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:18:25,319 INFO L85 PathProgramCache]: Analyzing trace with hash 40385003, now seen corresponding path program 1 times [2023-08-30 03:18:25,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:18:25,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236182052] [2023-08-30 03:18:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:18:25,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:18:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:18:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:18:25,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:18:25,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236182052] [2023-08-30 03:18:25,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236182052] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:18:25,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:18:25,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 03:18:25,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384226879] [2023-08-30 03:18:25,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:18:25,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:18:25,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:18:25,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:18:25,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:18:25,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 366 [2023-08-30 03:18:25,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 122 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) [2023-08-30 03:18:25,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:18:25,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 366 [2023-08-30 03:18:25,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:18:46,750 INFO L130 PetriNetUnfolder]: 163615/219861 cut-off events. [2023-08-30 03:18:46,751 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:18:47,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438607 conditions, 219861 events. 163615/219861 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10622. Compared 1565317 event pairs, 97625 based on Foata normal form. 0/121370 useless extension candidates. Maximal degree in co-relation 438604. Up to 122981 conditions per place. [2023-08-30 03:18:47,889 INFO L137 encePairwiseOnDemand]: 345/366 looper letters, 68 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2023-08-30 03:18:47,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 326 flow [2023-08-30 03:18:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:18:47,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:18:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-08-30 03:18:47,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4553734061930783 [2023-08-30 03:18:47,894 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-08-30 03:18:47,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-08-30 03:18:47,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:18:47,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-08-30 03:18:47,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:18:47,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:18:47,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:18:47,900 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 122 flow. Second operand 3 states and 500 transitions. [2023-08-30 03:18:47,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 326 flow [2023-08-30 03:18:47,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 80 transitions, 326 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 03:18:47,903 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 214 flow [2023-08-30 03:18:47,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2023-08-30 03:18:47,904 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -33 predicate places. [2023-08-30 03:18:47,904 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 214 flow [2023-08-30 03:18:47,904 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) [2023-08-30 03:18:47,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:18:47,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 03:18:47,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 03:18:47,905 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2023-08-30 03:18:47,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:18:47,906 INFO L85 PathProgramCache]: Analyzing trace with hash 40385004, now seen corresponding path program 1 times [2023-08-30 03:18:47,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:18:47,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204292404] [2023-08-30 03:18:47,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:18:47,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:18:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:18:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:18:47,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:18:47,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204292404] [2023-08-30 03:18:47,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204292404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:18:47,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:18:47,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 03:18:47,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503855458] [2023-08-30 03:18:47,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:18:47,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:18:47,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:18:48,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:18:48,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:18:48,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 366 [2023-08-30 03:18:48,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 214 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) [2023-08-30 03:18:48,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:18:48,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 366 [2023-08-30 03:18:48,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:18:54,568 INFO L130 PetriNetUnfolder]: 43383/60496 cut-off events. [2023-08-30 03:18:54,569 INFO L131 PetriNetUnfolder]: For 16185/16185 co-relation queries the response was YES. [2023-08-30 03:18:54,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165624 conditions, 60496 events. 43383/60496 cut-off events. For 16185/16185 co-relation queries the response was YES. Maximal size of possible extension queue 3209. Compared 401666 event pairs, 33858 based on Foata normal form. 13760/64499 useless extension candidates. Maximal degree in co-relation 165619. Up to 59756 conditions per place. [2023-08-30 03:18:54,854 INFO L137 encePairwiseOnDemand]: 355/366 looper letters, 52 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-08-30 03:18:54,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 54 transitions, 300 flow [2023-08-30 03:18:54,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:18:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:18:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-30 03:18:54,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344262295081967 [2023-08-30 03:18:54,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-30 03:18:54,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-30 03:18:54,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:18:54,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-30 03:18:54,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:18:54,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:18:54,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:18:54,861 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 214 flow. Second operand 3 states and 477 transitions. [2023-08-30 03:18:54,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 54 transitions, 300 flow [2023-08-30 03:18:55,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 54 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 03:18:55,153 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 174 flow [2023-08-30 03:18:55,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2023-08-30 03:18:55,154 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -43 predicate places. [2023-08-30 03:18:55,154 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 174 flow [2023-08-30 03:18:55,155 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) [2023-08-30 03:18:55,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:18:55,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 03:18:55,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 03:18:55,155 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P1Err0ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2023-08-30 03:18:55,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:18:55,156 INFO L85 PathProgramCache]: Analyzing trace with hash 156198412, now seen corresponding path program 1 times [2023-08-30 03:18:55,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:18:55,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035802871] [2023-08-30 03:18:55,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:18:55,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:18:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:18:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:18:55,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:18:55,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035802871] [2023-08-30 03:18:55,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035802871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:18:55,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:18:55,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 03:18:55,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754638264] [2023-08-30 03:18:55,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:18:55,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:18:55,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:18:55,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:18:55,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:18:55,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 366 [2023-08-30 03:18:55,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:18:55,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:18:55,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 366 [2023-08-30 03:18:55,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:19:00,618 INFO L130 PetriNetUnfolder]: 36210/50459 cut-off events. [2023-08-30 03:19:00,618 INFO L131 PetriNetUnfolder]: For 6605/6605 co-relation queries the response was YES. [2023-08-30 03:19:00,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130574 conditions, 50459 events. 36210/50459 cut-off events. For 6605/6605 co-relation queries the response was YES. Maximal size of possible extension queue 2669. Compared 336984 event pairs, 8938 based on Foata normal form. 0/38943 useless extension candidates. Maximal degree in co-relation 130569. Up to 42956 conditions per place. [2023-08-30 03:19:00,843 INFO L137 encePairwiseOnDemand]: 363/366 looper letters, 89 selfloop transitions, 2 changer transitions 2/94 dead transitions. [2023-08-30 03:19:00,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 94 transitions, 490 flow [2023-08-30 03:19:00,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:19:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:19:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-08-30 03:19:00,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4553734061930783 [2023-08-30 03:19:00,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-08-30 03:19:00,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-08-30 03:19:00,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:19:00,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-08-30 03:19:00,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:00,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:00,851 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:00,851 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 174 flow. Second operand 3 states and 500 transitions. [2023-08-30 03:19:00,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 94 transitions, 490 flow [2023-08-30 03:19:00,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 489 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:19:00,854 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 173 flow [2023-08-30 03:19:00,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2023-08-30 03:19:00,855 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -43 predicate places. [2023-08-30 03:19:00,855 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 173 flow [2023-08-30 03:19:00,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:00,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:19:00,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:19:00,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 03:19:00,856 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2023-08-30 03:19:00,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:19:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1659350889, now seen corresponding path program 1 times [2023-08-30 03:19:00,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:19:00,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134123184] [2023-08-30 03:19:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:19:00,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:19:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:19:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:19:00,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:19:00,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134123184] [2023-08-30 03:19:00,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134123184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:19:00,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:19:00,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 03:19:00,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176017486] [2023-08-30 03:19:00,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:19:00,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:19:00,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:19:00,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:19:00,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:19:00,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 366 [2023-08-30 03:19:00,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:00,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:19:00,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 366 [2023-08-30 03:19:00,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:19:06,099 INFO L130 PetriNetUnfolder]: 35026/49851 cut-off events. [2023-08-30 03:19:06,100 INFO L131 PetriNetUnfolder]: For 7617/7617 co-relation queries the response was YES. [2023-08-30 03:19:06,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130191 conditions, 49851 events. 35026/49851 cut-off events. For 7617/7617 co-relation queries the response was YES. Maximal size of possible extension queue 2774. Compared 340455 event pairs, 12202 based on Foata normal form. 0/38723 useless extension candidates. Maximal degree in co-relation 130186. Up to 37365 conditions per place. [2023-08-30 03:19:06,393 INFO L137 encePairwiseOnDemand]: 362/366 looper letters, 81 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2023-08-30 03:19:06,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 85 transitions, 451 flow [2023-08-30 03:19:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:19:06,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:19:06,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-30 03:19:06,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44899817850637525 [2023-08-30 03:19:06,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-30 03:19:06,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-30 03:19:06,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:19:06,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-30 03:19:06,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:06,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:06,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:06,398 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 173 flow. Second operand 3 states and 493 transitions. [2023-08-30 03:19:06,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 85 transitions, 451 flow [2023-08-30 03:19:06,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 85 transitions, 445 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 03:19:06,404 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 182 flow [2023-08-30 03:19:06,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2023-08-30 03:19:06,405 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -43 predicate places. [2023-08-30 03:19:06,405 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 182 flow [2023-08-30 03:19:06,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:06,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:19:06,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:19:06,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 03:19:06,406 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2023-08-30 03:19:06,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:19:06,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1659350539, now seen corresponding path program 1 times [2023-08-30 03:19:06,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:19:06,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684550086] [2023-08-30 03:19:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:19:06,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:19:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:19:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:19:06,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:19:06,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684550086] [2023-08-30 03:19:06,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684550086] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:19:06,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:19:06,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 03:19:06,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842399958] [2023-08-30 03:19:06,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:19:06,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:19:06,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:19:06,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:19:06,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:19:06,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 366 [2023-08-30 03:19:06,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:06,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:19:06,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 366 [2023-08-30 03:19:06,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:19:12,015 INFO L130 PetriNetUnfolder]: 34818/48555 cut-off events. [2023-08-30 03:19:12,015 INFO L131 PetriNetUnfolder]: For 9554/9554 co-relation queries the response was YES. [2023-08-30 03:19:12,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130432 conditions, 48555 events. 34818/48555 cut-off events. For 9554/9554 co-relation queries the response was YES. Maximal size of possible extension queue 2631. Compared 326404 event pairs, 9762 based on Foata normal form. 0/38579 useless extension candidates. Maximal degree in co-relation 130426. Up to 40690 conditions per place. [2023-08-30 03:19:12,239 INFO L137 encePairwiseOnDemand]: 363/366 looper letters, 92 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-30 03:19:12,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 95 transitions, 520 flow [2023-08-30 03:19:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:19:12,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:19:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2023-08-30 03:19:12,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453551912568306 [2023-08-30 03:19:12,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2023-08-30 03:19:12,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2023-08-30 03:19:12,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:19:12,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2023-08-30 03:19:12,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:12,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:12,245 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:12,246 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 182 flow. Second operand 3 states and 498 transitions. [2023-08-30 03:19:12,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 95 transitions, 520 flow [2023-08-30 03:19:12,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 95 transitions, 510 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 03:19:12,252 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 184 flow [2023-08-30 03:19:12,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2023-08-30 03:19:12,258 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -42 predicate places. [2023-08-30 03:19:12,258 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 184 flow [2023-08-30 03:19:12,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:12,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:19:12,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:19:12,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 03:19:12,259 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2023-08-30 03:19:12,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:19:12,260 INFO L85 PathProgramCache]: Analyzing trace with hash 99739827, now seen corresponding path program 1 times [2023-08-30 03:19:12,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:19:12,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822896730] [2023-08-30 03:19:12,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:19:12,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:19:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:19:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:19:12,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:19:12,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822896730] [2023-08-30 03:19:12,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822896730] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:19:12,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:19:12,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:19:12,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837419942] [2023-08-30 03:19:12,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:19:12,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 03:19:12,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:19:12,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 03:19:12,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 03:19:12,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 366 [2023-08-30 03:19:12,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:12,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:19:12,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 366 [2023-08-30 03:19:12,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:19:21,079 INFO L130 PetriNetUnfolder]: 55838/78567 cut-off events. [2023-08-30 03:19:21,080 INFO L131 PetriNetUnfolder]: For 14401/14401 co-relation queries the response was YES. [2023-08-30 03:19:21,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215403 conditions, 78567 events. 55838/78567 cut-off events. For 14401/14401 co-relation queries the response was YES. Maximal size of possible extension queue 4376. Compared 564914 event pairs, 9713 based on Foata normal form. 192/60441 useless extension candidates. Maximal degree in co-relation 215396. Up to 38164 conditions per place. [2023-08-30 03:19:21,500 INFO L137 encePairwiseOnDemand]: 362/366 looper letters, 118 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2023-08-30 03:19:21,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 122 transitions, 681 flow [2023-08-30 03:19:21,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:19:21,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:19:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 649 transitions. [2023-08-30 03:19:21,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44330601092896177 [2023-08-30 03:19:21,502 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 649 transitions. [2023-08-30 03:19:21,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 649 transitions. [2023-08-30 03:19:21,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:19:21,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 649 transitions. [2023-08-30 03:19:21,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:21,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:21,507 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:21,508 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 184 flow. Second operand 4 states and 649 transitions. [2023-08-30 03:19:21,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 122 transitions, 681 flow [2023-08-30 03:19:21,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 122 transitions, 675 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 03:19:21,516 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 199 flow [2023-08-30 03:19:21,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2023-08-30 03:19:21,516 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -39 predicate places. [2023-08-30 03:19:21,517 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 199 flow [2023-08-30 03:19:21,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:21,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:19:21,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:19:21,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 03:19:21,518 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2023-08-30 03:19:21,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:19:21,518 INFO L85 PathProgramCache]: Analyzing trace with hash -757015056, now seen corresponding path program 1 times [2023-08-30 03:19:21,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:19:21,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702005989] [2023-08-30 03:19:21,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:19:21,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:19:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:19:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:19:21,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:19:21,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702005989] [2023-08-30 03:19:21,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702005989] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:19:21,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:19:21,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 03:19:21,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508354269] [2023-08-30 03:19:21,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:19:21,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 03:19:21,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:19:21,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 03:19:21,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 03:19:21,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 366 [2023-08-30 03:19:21,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:21,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:19:21,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 366 [2023-08-30 03:19:21,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:19:35,936 INFO L130 PetriNetUnfolder]: 93597/133062 cut-off events. [2023-08-30 03:19:35,936 INFO L131 PetriNetUnfolder]: For 31002/31002 co-relation queries the response was YES. [2023-08-30 03:19:36,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371302 conditions, 133062 events. 93597/133062 cut-off events. For 31002/31002 co-relation queries the response was YES. Maximal size of possible extension queue 7882. Compared 1032910 event pairs, 35277 based on Foata normal form. 0/102426 useless extension candidates. Maximal degree in co-relation 371293. Up to 58676 conditions per place. [2023-08-30 03:19:36,755 INFO L137 encePairwiseOnDemand]: 362/366 looper letters, 120 selfloop transitions, 4 changer transitions 0/125 dead transitions. [2023-08-30 03:19:36,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 125 transitions, 717 flow [2023-08-30 03:19:36,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 03:19:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 03:19:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 779 transitions. [2023-08-30 03:19:36,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42568306010928963 [2023-08-30 03:19:36,758 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 779 transitions. [2023-08-30 03:19:36,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 779 transitions. [2023-08-30 03:19:36,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:19:36,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 779 transitions. [2023-08-30 03:19:36,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 155.8) internal successors, (779), 5 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:36,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 366.0) internal successors, (2196), 6 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:36,763 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 366.0) internal successors, (2196), 6 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:36,763 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 199 flow. Second operand 5 states and 779 transitions. [2023-08-30 03:19:36,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 125 transitions, 717 flow [2023-08-30 03:19:36,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 125 transitions, 709 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 03:19:36,807 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 206 flow [2023-08-30 03:19:36,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2023-08-30 03:19:36,807 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -37 predicate places. [2023-08-30 03:19:36,807 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 206 flow [2023-08-30 03:19:36,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:36,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:19:36,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:19:36,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 03:19:36,809 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2023-08-30 03:19:36,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:19:36,809 INFO L85 PathProgramCache]: Analyzing trace with hash 99739073, now seen corresponding path program 1 times [2023-08-30 03:19:36,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:19:36,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233901351] [2023-08-30 03:19:36,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:19:36,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:19:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:19:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:19:36,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:19:36,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233901351] [2023-08-30 03:19:36,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233901351] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:19:36,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:19:36,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 03:19:36,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401428037] [2023-08-30 03:19:36,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:19:36,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 03:19:36,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:19:36,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 03:19:36,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 03:19:37,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 366 [2023-08-30 03:19:37,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:37,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:19:37,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 366 [2023-08-30 03:19:37,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:19:52,337 INFO L130 PetriNetUnfolder]: 99975/142980 cut-off events. [2023-08-30 03:19:52,337 INFO L131 PetriNetUnfolder]: For 38582/38582 co-relation queries the response was YES. [2023-08-30 03:19:52,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397489 conditions, 142980 events. 99975/142980 cut-off events. For 38582/38582 co-relation queries the response was YES. Maximal size of possible extension queue 8646. Compared 1128973 event pairs, 36853 based on Foata normal form. 600/113616 useless extension candidates. Maximal degree in co-relation 397479. Up to 74897 conditions per place. [2023-08-30 03:19:53,379 INFO L137 encePairwiseOnDemand]: 354/366 looper letters, 65 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2023-08-30 03:19:53,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 472 flow [2023-08-30 03:19:53,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:19:53,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:19:53,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 624 transitions. [2023-08-30 03:19:53,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262295081967213 [2023-08-30 03:19:53,381 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 624 transitions. [2023-08-30 03:19:53,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 624 transitions. [2023-08-30 03:19:53,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:19:53,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 624 transitions. [2023-08-30 03:19:53,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:53,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:53,386 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:53,386 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 206 flow. Second operand 4 states and 624 transitions. [2023-08-30 03:19:53,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 472 flow [2023-08-30 03:19:53,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 465 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 03:19:53,402 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 249 flow [2023-08-30 03:19:53,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-08-30 03:19:53,403 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -38 predicate places. [2023-08-30 03:19:53,403 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 249 flow [2023-08-30 03:19:53,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:53,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:19:53,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:19:53,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 03:19:53,405 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2023-08-30 03:19:53,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:19:53,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1323548810, now seen corresponding path program 1 times [2023-08-30 03:19:53,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:19:53,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307157164] [2023-08-30 03:19:53,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:19:53,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:19:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:19:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:19:53,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:19:53,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307157164] [2023-08-30 03:19:53,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307157164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:19:53,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:19:53,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 03:19:53,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994919284] [2023-08-30 03:19:53,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:19:53,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 03:19:53,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:19:53,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 03:19:53,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 03:19:53,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 366 [2023-08-30 03:19:53,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:19:53,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:19:53,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 366 [2023-08-30 03:19:53,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:20:09,607 INFO L130 PetriNetUnfolder]: 99864/142797 cut-off events. [2023-08-30 03:20:09,607 INFO L131 PetriNetUnfolder]: For 60930/60930 co-relation queries the response was YES. [2023-08-30 03:20:10,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426505 conditions, 142797 events. 99864/142797 cut-off events. For 60930/60930 co-relation queries the response was YES. Maximal size of possible extension queue 8615. Compared 1129155 event pairs, 39706 based on Foata normal form. 36/126069 useless extension candidates. Maximal degree in co-relation 426496. Up to 122847 conditions per place. [2023-08-30 03:20:10,544 INFO L137 encePairwiseOnDemand]: 363/366 looper letters, 84 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2023-08-30 03:20:10,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 88 transitions, 548 flow [2023-08-30 03:20:10,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:20:10,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:20:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-30 03:20:10,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344262295081967 [2023-08-30 03:20:10,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-30 03:20:10,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-30 03:20:10,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:20:10,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-30 03:20:10,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:20:10,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:20:10,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:20:10,549 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 249 flow. Second operand 3 states and 477 transitions. [2023-08-30 03:20:10,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 88 transitions, 548 flow [2023-08-30 03:20:10,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 88 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:20:10,805 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 244 flow [2023-08-30 03:20:10,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-08-30 03:20:10,806 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -36 predicate places. [2023-08-30 03:20:10,806 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 244 flow [2023-08-30 03:20:10,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:20:10,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:20:10,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:20:10,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 03:20:10,807 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2023-08-30 03:20:10,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:20:10,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1202989183, now seen corresponding path program 1 times [2023-08-30 03:20:10,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:20:10,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241656641] [2023-08-30 03:20:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:20:10,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:20:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:20:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:20:10,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:20:10,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241656641] [2023-08-30 03:20:10,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241656641] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:20:10,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:20:10,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 03:20:10,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141255621] [2023-08-30 03:20:10,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:20:10,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 03:20:10,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:20:10,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 03:20:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 03:20:10,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 366 [2023-08-30 03:20:10,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:20:10,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:20:10,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 366 [2023-08-30 03:20:10,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand