./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.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/goblint-regression/28-race_reach_73-funloop_hard_racefree.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 c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 --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 04:16:41,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:16:41,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:16:41,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:16:41,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:16:41,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:16:41,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:16:41,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:16:41,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:16:41,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:16:41,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:16:41,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:16:41,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:16:41,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:16:41,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:16:41,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:16:41,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:16:41,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:16:41,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:16:41,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:16:41,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:16:41,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:16:41,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:16:41,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:16:41,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:16:41,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:16:41,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:16:41,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:16:41,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:16:41,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:16:41,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:16:41,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:16:41,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:16:41,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:16:41,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:16:41,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:16:41,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:16:41,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:16:41,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:16:41,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:16:41,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:16:41,696 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:16:41,731 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:16:41,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:16:41,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:16:41,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:16:41,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:16:41,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:16:41,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:16:41,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:16:41,735 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:16:41,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:16:41,736 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:16:41,736 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:16:41,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:16:41,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:16:41,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:16:41,737 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:16:41,737 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:16:41,737 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:16:41,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:16:41,737 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:16:41,738 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:16:41,738 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:16:41,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:16:41,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:16:41,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:16:41,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:16:41,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:16:41,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:16:41,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:16:41,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:16:41,740 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:16:41,740 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:16:41,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:16:41,740 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:16:41,740 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:16:42,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:16:42,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:16:42,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:16:42,076 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:16:42,076 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:16:42,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-08-30 04:16:43,157 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:16:43,421 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:16:43,421 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-08-30 04:16:43,432 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb7ddc1a2/a92761010c8c4c52baf6322c91ba2a2f/FLAGe40ebab6c [2023-08-30 04:16:43,444 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb7ddc1a2/a92761010c8c4c52baf6322c91ba2a2f [2023-08-30 04:16:43,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:16:43,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:16:43,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:16:43,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:16:43,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:16:43,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:16:43" (1/1) ... [2023-08-30 04:16:43,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d0c80de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:43, skipping insertion in model container [2023-08-30 04:16:43,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:16:43" (1/1) ... [2023-08-30 04:16:43,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:16:43,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:16:43,798 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i[41323,41336] [2023-08-30 04:16:43,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:16:43,861 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:16:43,927 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i[41323,41336] [2023-08-30 04:16:43,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:16:44,039 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:16:44,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:44 WrapperNode [2023-08-30 04:16:44,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:16:44,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:16:44,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:16:44,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:16:44,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:44" (1/1) ... [2023-08-30 04:16:44,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:44" (1/1) ... [2023-08-30 04:16:44,091 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 250 [2023-08-30 04:16:44,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:16:44,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:16:44,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:16:44,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:16:44,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:44" (1/1) ... [2023-08-30 04:16:44,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:44" (1/1) ... [2023-08-30 04:16:44,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:44" (1/1) ... [2023-08-30 04:16:44,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:44" (1/1) ... [2023-08-30 04:16:44,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:44" (1/1) ... [2023-08-30 04:16:44,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:44" (1/1) ... [2023-08-30 04:16:44,120 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:44" (1/1) ... [2023-08-30 04:16:44,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:44" (1/1) ... [2023-08-30 04:16:44,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:16:44,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:16:44,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:16:44,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:16:44,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:44" (1/1) ... [2023-08-30 04:16:44,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:16:44,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:16:44,176 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 04:16:44,204 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 04:16:44,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:16:44,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:16:44,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:16:44,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:16:44,218 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:16:44,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:16:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:16:44,219 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:16:44,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:16:44,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:16:44,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:16:44,221 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 04:16:44,376 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:16:44,378 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:16:44,771 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:16:44,779 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:16:44,780 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-08-30 04:16:44,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:16:44 BoogieIcfgContainer [2023-08-30 04:16:44,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:16:44,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:16:44,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:16:44,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:16:44,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:16:43" (1/3) ... [2023-08-30 04:16:44,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182d0a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:16:44, skipping insertion in model container [2023-08-30 04:16:44,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:44" (2/3) ... [2023-08-30 04:16:44,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182d0a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:16:44, skipping insertion in model container [2023-08-30 04:16:44,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:16:44" (3/3) ... [2023-08-30 04:16:44,791 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2023-08-30 04:16:44,806 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:16:44,806 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-08-30 04:16:44,806 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:16:44,878 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:16:44,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 284 transitions, 576 flow [2023-08-30 04:16:45,070 INFO L130 PetriNetUnfolder]: 73/446 cut-off events. [2023-08-30 04:16:45,070 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:16:45,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 446 events. 73/446 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2298 event pairs, 0 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-08-30 04:16:45,081 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 284 transitions, 576 flow [2023-08-30 04:16:45,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 284 transitions, 576 flow [2023-08-30 04:16:45,098 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:16:45,117 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 284 transitions, 576 flow [2023-08-30 04:16:45,126 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 284 transitions, 576 flow [2023-08-30 04:16:45,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 284 transitions, 576 flow [2023-08-30 04:16:45,203 INFO L130 PetriNetUnfolder]: 73/446 cut-off events. [2023-08-30 04:16:45,204 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:16:45,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 446 events. 73/446 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2298 event pairs, 0 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-08-30 04:16:45,221 INFO L119 LiptonReduction]: Number of co-enabled transitions 26544 [2023-08-30 04:16:49,461 INFO L134 LiptonReduction]: Checked pairs total: 53426 [2023-08-30 04:16:49,464 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-08-30 04:16:49,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:16:49,489 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;@cbd1fd9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:16:49,489 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-08-30 04:16:49,493 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 04:16:49,494 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:16:49,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:49,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:16:49,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:16:49,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:49,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1105630, now seen corresponding path program 1 times [2023-08-30 04:16:49,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:49,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847147900] [2023-08-30 04:16:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:49,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:49,721 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 04:16:49,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:16:49,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847147900] [2023-08-30 04:16:49,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847147900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:16:49,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:16:49,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:16:49,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024072300] [2023-08-30 04:16:49,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:16:49,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:16:49,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:16:49,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:16:49,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:16:49,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 543 [2023-08-30 04:16:49,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 134 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:49,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:16:49,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 543 [2023-08-30 04:16:49,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:16:50,088 INFO L130 PetriNetUnfolder]: 1102/2408 cut-off events. [2023-08-30 04:16:50,089 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:16:50,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4486 conditions, 2408 events. 1102/2408 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17546 event pairs, 940 based on Foata normal form. 184/1699 useless extension candidates. Maximal degree in co-relation 4358. Up to 2070 conditions per place. [2023-08-30 04:16:50,100 INFO L137 encePairwiseOnDemand]: 499/543 looper letters, 74 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-30 04:16:50,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 348 flow [2023-08-30 04:16:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:16:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:16:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 829 transitions. [2023-08-30 04:16:50,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089011663597299 [2023-08-30 04:16:50,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 829 transitions. [2023-08-30 04:16:50,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 829 transitions. [2023-08-30 04:16:50,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:16:50,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 829 transitions. [2023-08-30 04:16:50,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:50,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:50,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:50,132 INFO L175 Difference]: Start difference. First operand has 99 places, 134 transitions, 276 flow. Second operand 3 states and 829 transitions. [2023-08-30 04:16:50,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 348 flow [2023-08-30 04:16:50,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 94 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:16:50,138 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 206 flow [2023-08-30 04:16:50,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2023-08-30 04:16:50,143 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2023-08-30 04:16:50,143 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 206 flow [2023-08-30 04:16:50,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:50,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:50,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:16:50,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:16:50,145 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:16:50,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:50,145 INFO L85 PathProgramCache]: Analyzing trace with hash 34306258, now seen corresponding path program 1 times [2023-08-30 04:16:50,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:50,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138577638] [2023-08-30 04:16:50,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:50,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:16:50,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:16:50,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138577638] [2023-08-30 04:16:50,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138577638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:16:50,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114153321] [2023-08-30 04:16:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:50,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:16:50,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:16:50,219 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:16:50,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 04:16:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:50,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:16:50,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:16:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:16:50,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:16:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:16:50,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114153321] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:16:50,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:16:50,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 04:16:50,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369966763] [2023-08-30 04:16:50,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:16:50,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:16:50,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:16:50,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:16:50,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:16:50,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 543 [2023-08-30 04:16:50,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 206 flow. Second operand has 7 states, 7 states have (on average 237.28571428571428) internal successors, (1661), 7 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:50,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:16:50,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 543 [2023-08-30 04:16:50,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:16:50,807 INFO L130 PetriNetUnfolder]: 1102/2411 cut-off events. [2023-08-30 04:16:50,808 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:16:50,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4502 conditions, 2411 events. 1102/2411 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17503 event pairs, 940 based on Foata normal form. 0/1518 useless extension candidates. Maximal degree in co-relation 4490. Up to 2070 conditions per place. [2023-08-30 04:16:50,819 INFO L137 encePairwiseOnDemand]: 540/543 looper letters, 74 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-08-30 04:16:50,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 376 flow [2023-08-30 04:16:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:16:50,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:16:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1498 transitions. [2023-08-30 04:16:50,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597912829957029 [2023-08-30 04:16:50,824 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1498 transitions. [2023-08-30 04:16:50,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1498 transitions. [2023-08-30 04:16:50,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:16:50,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1498 transitions. [2023-08-30 04:16:50,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 249.66666666666666) internal successors, (1498), 6 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:50,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 543.0) internal successors, (3801), 7 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:50,834 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 543.0) internal successors, (3801), 7 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:50,835 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 206 flow. Second operand 6 states and 1498 transitions. [2023-08-30 04:16:50,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 376 flow [2023-08-30 04:16:50,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 372 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:16:50,838 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 238 flow [2023-08-30 04:16:50,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2023-08-30 04:16:50,839 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2023-08-30 04:16:50,839 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 238 flow [2023-08-30 04:16:50,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 237.28571428571428) internal successors, (1661), 7 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:50,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:50,841 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:16:50,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 04:16:51,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:16:51,047 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:16:51,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:51,048 INFO L85 PathProgramCache]: Analyzing trace with hash -152978466, now seen corresponding path program 2 times [2023-08-30 04:16:51,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:51,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584046101] [2023-08-30 04:16:51,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:51,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:16:51,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:16:51,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584046101] [2023-08-30 04:16:51,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584046101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:16:51,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728619411] [2023-08-30 04:16:51,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:16:51,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:16:51,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:16:51,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:16:51,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 04:16:51,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:16:51,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:16:51,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 04:16:51,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:16:51,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:16:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:16:51,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:16:51,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728619411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:16:51,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 04:16:51,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-30 04:16:51,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497769182] [2023-08-30 04:16:51,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:16:51,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:16:51,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:16:51,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:16:51,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:16:51,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 543 [2023-08-30 04:16:51,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:51,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:16:51,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 543 [2023-08-30 04:16:51,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:16:51,640 INFO L130 PetriNetUnfolder]: 1053/2271 cut-off events. [2023-08-30 04:16:51,641 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 04:16:51,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4354 conditions, 2271 events. 1053/2271 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16982 event pairs, 0 based on Foata normal form. 0/1481 useless extension candidates. Maximal degree in co-relation 4320. Up to 2009 conditions per place. [2023-08-30 04:16:51,652 INFO L137 encePairwiseOnDemand]: 539/543 looper letters, 100 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2023-08-30 04:16:51,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 488 flow [2023-08-30 04:16:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:16:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:16:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 808 transitions. [2023-08-30 04:16:51,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4960098219766728 [2023-08-30 04:16:51,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 808 transitions. [2023-08-30 04:16:51,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 808 transitions. [2023-08-30 04:16:51,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:16:51,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 808 transitions. [2023-08-30 04:16:51,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:51,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:51,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:51,661 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 238 flow. Second operand 3 states and 808 transitions. [2023-08-30 04:16:51,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 488 flow [2023-08-30 04:16:51,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 120 transitions, 474 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:16:51,665 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 234 flow [2023-08-30 04:16:51,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2023-08-30 04:16:51,666 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 2 predicate places. [2023-08-30 04:16:51,667 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 234 flow [2023-08-30 04:16:51,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:51,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:51,667 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:16:51,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:16:51,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-30 04:16:51,874 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:16:51,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash -152978465, now seen corresponding path program 1 times [2023-08-30 04:16:51,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:51,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579811550] [2023-08-30 04:16:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:51,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:16:51,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:16:51,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579811550] [2023-08-30 04:16:51,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579811550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:16:51,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:16:51,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:16:51,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358443001] [2023-08-30 04:16:51,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:16:51,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:16:51,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:16:51,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:16:51,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:16:52,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 543 [2023-08-30 04:16:52,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:52,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:16:52,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 543 [2023-08-30 04:16:52,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:16:52,292 INFO L130 PetriNetUnfolder]: 1050/2235 cut-off events. [2023-08-30 04:16:52,292 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-30 04:16:52,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4293 conditions, 2235 events. 1050/2235 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15923 event pairs, 860 based on Foata normal form. 0/1479 useless extension candidates. Maximal degree in co-relation 4264. Up to 1855 conditions per place. [2023-08-30 04:16:52,302 INFO L137 encePairwiseOnDemand]: 538/543 looper letters, 95 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2023-08-30 04:16:52,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 116 transitions, 468 flow [2023-08-30 04:16:52,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:16:52,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:16:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 795 transitions. [2023-08-30 04:16:52,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880294659300184 [2023-08-30 04:16:52,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 795 transitions. [2023-08-30 04:16:52,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 795 transitions. [2023-08-30 04:16:52,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:16:52,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 795 transitions. [2023-08-30 04:16:52,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:52,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:52,312 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:52,312 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 234 flow. Second operand 3 states and 795 transitions. [2023-08-30 04:16:52,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 116 transitions, 468 flow [2023-08-30 04:16:52,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 116 transitions, 464 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:16:52,318 INFO L231 Difference]: Finished difference. Result has 99 places, 95 transitions, 232 flow [2023-08-30 04:16:52,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=99, PETRI_TRANSITIONS=95} [2023-08-30 04:16:52,319 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2023-08-30 04:16:52,320 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 95 transitions, 232 flow [2023-08-30 04:16:52,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:52,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:52,321 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:16:52,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:16:52,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:16:52,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:52,321 INFO L85 PathProgramCache]: Analyzing trace with hash -420381068, now seen corresponding path program 1 times [2023-08-30 04:16:52,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:52,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341664544] [2023-08-30 04:16:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:52,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:16:52,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:16:52,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341664544] [2023-08-30 04:16:52,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341664544] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:16:52,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638493558] [2023-08-30 04:16:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:52,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:16:52,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:16:52,435 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:16:52,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 04:16:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:52,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:16:52,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:16:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:16:52,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:16:52,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:16:52,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638493558] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:16:52,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:16:52,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 04:16:52,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230718627] [2023-08-30 04:16:52,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:16:52,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 04:16:52,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:16:52,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 04:16:52,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 04:16:52,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 543 [2023-08-30 04:16:52,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 95 transitions, 232 flow. Second operand has 13 states, 13 states have (on average 237.3846153846154) internal successors, (3086), 13 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:52,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:16:52,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 543 [2023-08-30 04:16:52,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:16:52,912 INFO L130 PetriNetUnfolder]: 1052/2243 cut-off events. [2023-08-30 04:16:52,912 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2023-08-30 04:16:52,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4342 conditions, 2243 events. 1052/2243 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15945 event pairs, 900 based on Foata normal form. 6/1514 useless extension candidates. Maximal degree in co-relation 4289. Up to 1944 conditions per place. [2023-08-30 04:16:52,924 INFO L137 encePairwiseOnDemand]: 540/543 looper letters, 72 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2023-08-30 04:16:52,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 101 transitions, 434 flow [2023-08-30 04:16:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:16:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:16:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2921 transitions. [2023-08-30 04:16:52,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44828115408225905 [2023-08-30 04:16:52,931 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2921 transitions. [2023-08-30 04:16:52,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2921 transitions. [2023-08-30 04:16:52,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:16:52,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2921 transitions. [2023-08-30 04:16:52,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 243.41666666666666) internal successors, (2921), 12 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:52,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 543.0) internal successors, (7059), 13 states have internal predecessors, (7059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:52,949 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 543.0) internal successors, (7059), 13 states have internal predecessors, (7059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:52,949 INFO L175 Difference]: Start difference. First operand has 99 places, 95 transitions, 232 flow. Second operand 12 states and 2921 transitions. [2023-08-30 04:16:52,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 101 transitions, 434 flow [2023-08-30 04:16:52,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 101 transitions, 428 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:16:52,975 INFO L231 Difference]: Finished difference. Result has 114 places, 101 transitions, 310 flow [2023-08-30 04:16:52,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=310, PETRI_PLACES=114, PETRI_TRANSITIONS=101} [2023-08-30 04:16:52,976 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 15 predicate places. [2023-08-30 04:16:52,976 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 101 transitions, 310 flow [2023-08-30 04:16:52,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 237.3846153846154) internal successors, (3086), 13 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:52,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:52,978 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-30 04:16:52,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:16:53,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:16:53,184 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:16:53,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:53,185 INFO L85 PathProgramCache]: Analyzing trace with hash -410340620, now seen corresponding path program 2 times [2023-08-30 04:16:53,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:53,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170056489] [2023-08-30 04:16:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:53,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:16:53,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:16:53,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170056489] [2023-08-30 04:16:53,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170056489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:16:53,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806814031] [2023-08-30 04:16:53,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:16:53,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:16:53,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:16:53,328 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:16:53,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 04:16:53,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:16:53,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:16:53,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 04:16:53,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:16:53,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:16:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:16:53,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:16:53,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806814031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:16:53,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 04:16:53,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-30 04:16:53,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602468233] [2023-08-30 04:16:53,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:16:53,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:16:53,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:16:53,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:16:53,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:16:53,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 543 [2023-08-30 04:16:53,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 101 transitions, 310 flow. Second operand has 4 states, 4 states have (on average 236.75) internal successors, (947), 4 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:53,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:16:53,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 543 [2023-08-30 04:16:53,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:16:53,909 INFO L130 PetriNetUnfolder]: 1030/2189 cut-off events. [2023-08-30 04:16:53,909 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-30 04:16:53,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4215 conditions, 2189 events. 1030/2189 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15449 event pairs, 574 based on Foata normal form. 0/1441 useless extension candidates. Maximal degree in co-relation 4138. Up to 1789 conditions per place. [2023-08-30 04:16:53,927 INFO L137 encePairwiseOnDemand]: 538/543 looper letters, 121 selfloop transitions, 4 changer transitions 0/143 dead transitions. [2023-08-30 04:16:53,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 143 transitions, 642 flow [2023-08-30 04:16:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:16:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:16:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1056 transitions. [2023-08-30 04:16:53,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861878453038674 [2023-08-30 04:16:53,932 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1056 transitions. [2023-08-30 04:16:53,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1056 transitions. [2023-08-30 04:16:53,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:16:53,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1056 transitions. [2023-08-30 04:16:53,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:53,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 543.0) internal successors, (2715), 5 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:53,938 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 543.0) internal successors, (2715), 5 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:53,939 INFO L175 Difference]: Start difference. First operand has 114 places, 101 transitions, 310 flow. Second operand 4 states and 1056 transitions. [2023-08-30 04:16:53,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 143 transitions, 642 flow [2023-08-30 04:16:53,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 143 transitions, 594 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 04:16:53,944 INFO L231 Difference]: Finished difference. Result has 111 places, 100 transitions, 266 flow [2023-08-30 04:16:53,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=111, PETRI_TRANSITIONS=100} [2023-08-30 04:16:53,946 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 12 predicate places. [2023-08-30 04:16:53,947 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 100 transitions, 266 flow [2023-08-30 04:16:53,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 236.75) internal successors, (947), 4 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:53,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:53,949 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-30 04:16:53,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 04:16:54,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:16:54,155 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:16:54,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:54,156 INFO L85 PathProgramCache]: Analyzing trace with hash 164343463, now seen corresponding path program 1 times [2023-08-30 04:16:54,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:54,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766258687] [2023-08-30 04:16:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:54,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:16:54,175 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:16:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:16:54,201 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:16:54,203 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:16:54,204 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2023-08-30 04:16:54,205 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2023-08-30 04:16:54,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2023-08-30 04:16:54,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2023-08-30 04:16:54,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2023-08-30 04:16:54,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2023-08-30 04:16:54,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2023-08-30 04:16:54,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (42 of 50 remaining) [2023-08-30 04:16:54,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2023-08-30 04:16:54,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2023-08-30 04:16:54,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2023-08-30 04:16:54,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2023-08-30 04:16:54,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2023-08-30 04:16:54,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2023-08-30 04:16:54,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2023-08-30 04:16:54,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2023-08-30 04:16:54,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 50 remaining) [2023-08-30 04:16:54,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2023-08-30 04:16:54,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2023-08-30 04:16:54,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2023-08-30 04:16:54,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2023-08-30 04:16:54,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2023-08-30 04:16:54,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK (27 of 50 remaining) [2023-08-30 04:16:54,211 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2023-08-30 04:16:54,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2023-08-30 04:16:54,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2023-08-30 04:16:54,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2023-08-30 04:16:54,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2023-08-30 04:16:54,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2023-08-30 04:16:54,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2023-08-30 04:16:54,212 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2023-08-30 04:16:54,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2023-08-30 04:16:54,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2023-08-30 04:16:54,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2023-08-30 04:16:54,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2023-08-30 04:16:54,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2023-08-30 04:16:54,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2023-08-30 04:16:54,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2023-08-30 04:16:54,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2023-08-30 04:16:54,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2023-08-30 04:16:54,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2023-08-30 04:16:54,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2023-08-30 04:16:54,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2023-08-30 04:16:54,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2023-08-30 04:16:54,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2023-08-30 04:16:54,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2023-08-30 04:16:54,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2023-08-30 04:16:54,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2023-08-30 04:16:54,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2023-08-30 04:16:54,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2023-08-30 04:16:54,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 04:16:54,216 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-08-30 04:16:54,218 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:16:54,218 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:16:54,260 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:16:54,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 310 places, 365 transitions, 748 flow [2023-08-30 04:16:54,356 INFO L130 PetriNetUnfolder]: 118/718 cut-off events. [2023-08-30 04:16:54,356 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:16:54,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 732 conditions, 718 events. 118/718 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4112 event pairs, 0 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 448. Up to 12 conditions per place. [2023-08-30 04:16:54,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 310 places, 365 transitions, 748 flow [2023-08-30 04:16:54,370 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 310 places, 365 transitions, 748 flow [2023-08-30 04:16:54,370 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:16:54,370 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 310 places, 365 transitions, 748 flow [2023-08-30 04:16:54,370 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 310 places, 365 transitions, 748 flow [2023-08-30 04:16:54,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 310 places, 365 transitions, 748 flow [2023-08-30 04:16:54,432 INFO L130 PetriNetUnfolder]: 118/718 cut-off events. [2023-08-30 04:16:54,433 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:16:54,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 732 conditions, 718 events. 118/718 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4112 event pairs, 0 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 448. Up to 12 conditions per place. [2023-08-30 04:16:54,469 INFO L119 LiptonReduction]: Number of co-enabled transitions 67308 [2023-08-30 04:16:59,030 INFO L134 LiptonReduction]: Checked pairs total: 141516 [2023-08-30 04:16:59,030 INFO L136 LiptonReduction]: Total number of compositions: 328 [2023-08-30 04:16:59,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:16:59,032 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;@cbd1fd9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:16:59,032 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2023-08-30 04:16:59,034 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-30 04:16:59,034 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:16:59,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:59,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:16:59,034 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:16:59,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:59,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1875791, now seen corresponding path program 1 times [2023-08-30 04:16:59,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:59,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064593997] [2023-08-30 04:16:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:59,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:59,061 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 04:16:59,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:16:59,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064593997] [2023-08-30 04:16:59,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064593997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:16:59,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:16:59,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:16:59,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267055223] [2023-08-30 04:16:59,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:16:59,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:16:59,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:16:59,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:16:59,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:16:59,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 693 [2023-08-30 04:16:59,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 179 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:59,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:16:59,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 693 [2023-08-30 04:16:59,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:04,604 INFO L130 PetriNetUnfolder]: 50358/80318 cut-off events. [2023-08-30 04:17:04,604 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2023-08-30 04:17:04,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152658 conditions, 80318 events. 50358/80318 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 3094. Compared 699926 event pairs, 44992 based on Foata normal form. 6364/59622 useless extension candidates. Maximal degree in co-relation 61755. Up to 72201 conditions per place. [2023-08-30 04:17:05,083 INFO L137 encePairwiseOnDemand]: 636/693 looper letters, 99 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2023-08-30 04:17:05,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 126 transitions, 472 flow [2023-08-30 04:17:05,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:17:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:17:05,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1065 transitions. [2023-08-30 04:17:05,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5122655122655123 [2023-08-30 04:17:05,088 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1065 transitions. [2023-08-30 04:17:05,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1065 transitions. [2023-08-30 04:17:05,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:05,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1065 transitions. [2023-08-30 04:17:05,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,095 INFO L175 Difference]: Start difference. First operand has 132 places, 179 transitions, 376 flow. Second operand 3 states and 1065 transitions. [2023-08-30 04:17:05,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 126 transitions, 472 flow [2023-08-30 04:17:05,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 126 transitions, 472 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:17:05,099 INFO L231 Difference]: Finished difference. Result has 123 places, 126 transitions, 280 flow [2023-08-30 04:17:05,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=123, PETRI_TRANSITIONS=126} [2023-08-30 04:17:05,100 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -9 predicate places. [2023-08-30 04:17:05,100 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 126 transitions, 280 flow [2023-08-30 04:17:05,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:05,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:17:05,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:17:05,101 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:17:05,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:05,101 INFO L85 PathProgramCache]: Analyzing trace with hash 58192314, now seen corresponding path program 1 times [2023-08-30 04:17:05,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:05,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997247416] [2023-08-30 04:17:05,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:05,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:05,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:05,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997247416] [2023-08-30 04:17:05,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997247416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:05,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751831254] [2023-08-30 04:17:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:05,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:05,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:05,127 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:17:05,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 04:17:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:05,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:17:05,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:05,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:05,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751831254] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:05,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:05,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 04:17:05,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651913875] [2023-08-30 04:17:05,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:05,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:17:05,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:05,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:17:05,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:17:05,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 693 [2023-08-30 04:17:05,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 126 transitions, 280 flow. Second operand has 6 states, 6 states have (on average 303.1666666666667) internal successors, (1819), 6 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:05,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 693 [2023-08-30 04:17:05,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:09,986 INFO L130 PetriNetUnfolder]: 50358/80321 cut-off events. [2023-08-30 04:17:09,987 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2023-08-30 04:17:10,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152674 conditions, 80321 events. 50358/80321 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 3081. Compared 699610 event pairs, 44992 based on Foata normal form. 0/53261 useless extension candidates. Maximal degree in co-relation 152661. Up to 72201 conditions per place. [2023-08-30 04:17:10,439 INFO L137 encePairwiseOnDemand]: 690/693 looper letters, 99 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2023-08-30 04:17:10,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 129 transitions, 500 flow [2023-08-30 04:17:10,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:17:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:17:10,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1919 transitions. [2023-08-30 04:17:10,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4615199615199615 [2023-08-30 04:17:10,445 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1919 transitions. [2023-08-30 04:17:10,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1919 transitions. [2023-08-30 04:17:10,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:10,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1919 transitions. [2023-08-30 04:17:10,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 319.8333333333333) internal successors, (1919), 6 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:10,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 693.0) internal successors, (4851), 7 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:10,455 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 693.0) internal successors, (4851), 7 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:10,455 INFO L175 Difference]: Start difference. First operand has 123 places, 126 transitions, 280 flow. Second operand 6 states and 1919 transitions. [2023-08-30 04:17:10,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 129 transitions, 500 flow [2023-08-30 04:17:10,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 129 transitions, 496 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:17:10,458 INFO L231 Difference]: Finished difference. Result has 130 places, 129 transitions, 312 flow [2023-08-30 04:17:10,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=130, PETRI_TRANSITIONS=129} [2023-08-30 04:17:10,459 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -2 predicate places. [2023-08-30 04:17:10,459 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 129 transitions, 312 flow [2023-08-30 04:17:10,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 303.1666666666667) internal successors, (1819), 6 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:10,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:10,460 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:17:10,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 04:17:10,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:10,669 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:17:10,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:10,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1517098544, now seen corresponding path program 2 times [2023-08-30 04:17:10,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:10,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481731238] [2023-08-30 04:17:10,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:10,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:17:10,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:10,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481731238] [2023-08-30 04:17:10,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481731238] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:10,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:10,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:17:10,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223309904] [2023-08-30 04:17:10,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:10,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:10,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:10,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:10,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:17:10,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 693 [2023-08-30 04:17:10,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 129 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 300.3333333333333) internal successors, (901), 3 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:10,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:10,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 693 [2023-08-30 04:17:10,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:15,392 INFO L130 PetriNetUnfolder]: 48188/76652 cut-off events. [2023-08-30 04:17:15,393 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2023-08-30 04:17:15,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145984 conditions, 76652 events. 48188/76652 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 2973. Compared 664871 event pairs, 41156 based on Foata normal form. 0/51330 useless extension candidates. Maximal degree in co-relation 145949. Up to 66088 conditions per place. [2023-08-30 04:17:15,800 INFO L137 encePairwiseOnDemand]: 688/693 looper letters, 143 selfloop transitions, 3 changer transitions 0/171 dead transitions. [2023-08-30 04:17:15,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 171 transitions, 688 flow [2023-08-30 04:17:15,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:17:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:17:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1041 transitions. [2023-08-30 04:17:15,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5007215007215007 [2023-08-30 04:17:15,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1041 transitions. [2023-08-30 04:17:15,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1041 transitions. [2023-08-30 04:17:15,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:15,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1041 transitions. [2023-08-30 04:17:15,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:15,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:15,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:15,811 INFO L175 Difference]: Start difference. First operand has 130 places, 129 transitions, 312 flow. Second operand 3 states and 1041 transitions. [2023-08-30 04:17:15,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 171 transitions, 688 flow [2023-08-30 04:17:15,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 171 transitions, 674 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:17:15,815 INFO L231 Difference]: Finished difference. Result has 129 places, 127 transitions, 300 flow [2023-08-30 04:17:15,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=129, PETRI_TRANSITIONS=127} [2023-08-30 04:17:15,816 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -3 predicate places. [2023-08-30 04:17:15,816 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 127 transitions, 300 flow [2023-08-30 04:17:15,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 300.3333333333333) internal successors, (901), 3 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:15,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:15,817 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:17:15,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:17:15,817 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:17:15,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:15,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1517098545, now seen corresponding path program 1 times [2023-08-30 04:17:15,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:15,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004330166] [2023-08-30 04:17:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:15,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:15,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:15,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004330166] [2023-08-30 04:17:15,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004330166] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:15,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843598833] [2023-08-30 04:17:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:15,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:15,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:15,885 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:17:15,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 04:17:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:15,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:17:15,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:15,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:16,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843598833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:16,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:16,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-30 04:17:16,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345549117] [2023-08-30 04:17:16,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:16,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:17:16,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:16,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:17:16,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:17:16,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 693 [2023-08-30 04:17:16,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 127 transitions, 300 flow. Second operand has 12 states, 12 states have (on average 303.0833333333333) internal successors, (3637), 12 states have internal predecessors, (3637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:16,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:16,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 693 [2023-08-30 04:17:16,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:20,934 INFO L130 PetriNetUnfolder]: 48274/76974 cut-off events. [2023-08-30 04:17:20,935 INFO L131 PetriNetUnfolder]: For 690/690 co-relation queries the response was YES. [2023-08-30 04:17:21,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147375 conditions, 76974 events. 48274/76974 cut-off events. For 690/690 co-relation queries the response was YES. Maximal size of possible extension queue 2971. Compared 668151 event pairs, 43084 based on Foata normal form. 6/52207 useless extension candidates. Maximal degree in co-relation 147322. Up to 69167 conditions per place. [2023-08-30 04:17:21,355 INFO L137 encePairwiseOnDemand]: 690/693 looper letters, 97 selfloop transitions, 11 changer transitions 0/133 dead transitions. [2023-08-30 04:17:21,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 133 transitions, 552 flow [2023-08-30 04:17:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:17:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:17:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3738 transitions. [2023-08-30 04:17:21,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2023-08-30 04:17:21,365 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3738 transitions. [2023-08-30 04:17:21,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3738 transitions. [2023-08-30 04:17:21,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:21,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3738 transitions. [2023-08-30 04:17:21,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 311.5) internal successors, (3738), 12 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:21,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 693.0) internal successors, (9009), 13 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:21,385 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 693.0) internal successors, (9009), 13 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:21,385 INFO L175 Difference]: Start difference. First operand has 129 places, 127 transitions, 300 flow. Second operand 12 states and 3738 transitions. [2023-08-30 04:17:21,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 133 transitions, 552 flow [2023-08-30 04:17:21,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 133 transitions, 546 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:17:21,405 INFO L231 Difference]: Finished difference. Result has 144 places, 133 transitions, 378 flow [2023-08-30 04:17:21,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=378, PETRI_PLACES=144, PETRI_TRANSITIONS=133} [2023-08-30 04:17:21,406 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, 12 predicate places. [2023-08-30 04:17:21,406 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 133 transitions, 378 flow [2023-08-30 04:17:21,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 303.0833333333333) internal successors, (3637), 12 states have internal predecessors, (3637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:21,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:21,407 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-30 04:17:21,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 04:17:21,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:21,617 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:17:21,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:21,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1043791473, now seen corresponding path program 2 times [2023-08-30 04:17:21,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:21,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187151795] [2023-08-30 04:17:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:21,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:21,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:21,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187151795] [2023-08-30 04:17:21,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187151795] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:21,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:21,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:17:21,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210839723] [2023-08-30 04:17:21,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:21,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:21,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:21,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:21,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:17:21,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 693 [2023-08-30 04:17:21,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 133 transitions, 378 flow. Second operand has 3 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:21,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:21,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 693 [2023-08-30 04:17:21,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:26,843 INFO L130 PetriNetUnfolder]: 47677/76688 cut-off events. [2023-08-30 04:17:26,843 INFO L131 PetriNetUnfolder]: For 135/135 co-relation queries the response was YES. [2023-08-30 04:17:27,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146050 conditions, 76688 events. 47677/76688 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 3027. Compared 678654 event pairs, 20820 based on Foata normal form. 0/51476 useless extension candidates. Maximal degree in co-relation 145973. Up to 69111 conditions per place. [2023-08-30 04:17:27,357 INFO L137 encePairwiseOnDemand]: 689/693 looper letters, 131 selfloop transitions, 2 changer transitions 0/158 dead transitions. [2023-08-30 04:17:27,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 158 transitions, 694 flow [2023-08-30 04:17:27,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:17:27,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:17:27,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1031 transitions. [2023-08-30 04:17:27,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959114959114959 [2023-08-30 04:17:27,361 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1031 transitions. [2023-08-30 04:17:27,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1031 transitions. [2023-08-30 04:17:27,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:27,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1031 transitions. [2023-08-30 04:17:27,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.6666666666667) internal successors, (1031), 3 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:27,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:27,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:27,367 INFO L175 Difference]: Start difference. First operand has 144 places, 133 transitions, 378 flow. Second operand 3 states and 1031 transitions. [2023-08-30 04:17:27,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 158 transitions, 694 flow [2023-08-30 04:17:27,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 646 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 04:17:27,371 INFO L231 Difference]: Finished difference. Result has 142 places, 134 transitions, 344 flow [2023-08-30 04:17:27,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=142, PETRI_TRANSITIONS=134} [2023-08-30 04:17:27,372 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, 10 predicate places. [2023-08-30 04:17:27,372 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 134 transitions, 344 flow [2023-08-30 04:17:27,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:27,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:27,373 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:27,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 04:17:27,373 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:17:27,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:27,373 INFO L85 PathProgramCache]: Analyzing trace with hash -839170391, now seen corresponding path program 1 times [2023-08-30 04:17:27,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:27,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402700249] [2023-08-30 04:17:27,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:27,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:27,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:27,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402700249] [2023-08-30 04:17:27,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402700249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:27,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187121694] [2023-08-30 04:17:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:27,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:27,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:27,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:17:27,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 04:17:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:27,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:17:27,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:27,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:17:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:27,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:27,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187121694] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:27,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:27,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-30 04:17:27,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700924960] [2023-08-30 04:17:27,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:27,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:17:27,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:27,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:17:27,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:17:28,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 693 [2023-08-30 04:17:28,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 134 transitions, 344 flow. Second operand has 8 states, 8 states have (on average 300.125) internal successors, (2401), 8 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:28,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:28,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 693 [2023-08-30 04:17:28,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:28,581 INFO L130 PetriNetUnfolder]: 2531/4676 cut-off events. [2023-08-30 04:17:28,581 INFO L131 PetriNetUnfolder]: For 1108/1108 co-relation queries the response was YES. [2023-08-30 04:17:28,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10300 conditions, 4676 events. 2531/4676 cut-off events. For 1108/1108 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 32955 event pairs, 242 based on Foata normal form. 506/4152 useless extension candidates. Maximal degree in co-relation 10246. Up to 2898 conditions per place. [2023-08-30 04:17:28,603 INFO L137 encePairwiseOnDemand]: 689/693 looper letters, 128 selfloop transitions, 3 changer transitions 0/145 dead transitions. [2023-08-30 04:17:28,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 145 transitions, 618 flow [2023-08-30 04:17:28,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:17:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:17:28,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1615 transitions. [2023-08-30 04:17:28,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660894660894661 [2023-08-30 04:17:28,607 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1615 transitions. [2023-08-30 04:17:28,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1615 transitions. [2023-08-30 04:17:28,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:28,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1615 transitions. [2023-08-30 04:17:28,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:28,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 693.0) internal successors, (4158), 6 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:28,615 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 693.0) internal successors, (4158), 6 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:28,615 INFO L175 Difference]: Start difference. First operand has 142 places, 134 transitions, 344 flow. Second operand 5 states and 1615 transitions. [2023-08-30 04:17:28,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 145 transitions, 618 flow [2023-08-30 04:17:28,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 145 transitions, 614 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:17:28,623 INFO L231 Difference]: Finished difference. Result has 92 places, 76 transitions, 220 flow [2023-08-30 04:17:28,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=92, PETRI_TRANSITIONS=76} [2023-08-30 04:17:28,624 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -40 predicate places. [2023-08-30 04:17:28,624 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 76 transitions, 220 flow [2023-08-30 04:17:28,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 300.125) internal successors, (2401), 8 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:28,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:28,625 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:28,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 04:17:28,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:28,831 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:17:28,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:28,831 INFO L85 PathProgramCache]: Analyzing trace with hash -226624470, now seen corresponding path program 1 times [2023-08-30 04:17:28,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:28,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576115908] [2023-08-30 04:17:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:28,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:29,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:29,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576115908] [2023-08-30 04:17:29,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576115908] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:29,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:29,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 04:17:29,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823955495] [2023-08-30 04:17:29,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:29,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:17:29,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:29,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:17:29,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:17:29,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 693 [2023-08-30 04:17:29,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 76 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 275.2857142857143) internal successors, (1927), 7 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:29,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:29,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 693 [2023-08-30 04:17:29,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:30,246 INFO L130 PetriNetUnfolder]: 4841/8261 cut-off events. [2023-08-30 04:17:30,247 INFO L131 PetriNetUnfolder]: For 3030/3030 co-relation queries the response was YES. [2023-08-30 04:17:30,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17825 conditions, 8261 events. 4841/8261 cut-off events. For 3030/3030 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 58311 event pairs, 2274 based on Foata normal form. 132/6476 useless extension candidates. Maximal degree in co-relation 17771. Up to 4005 conditions per place. [2023-08-30 04:17:30,274 INFO L137 encePairwiseOnDemand]: 684/693 looper letters, 151 selfloop transitions, 6 changer transitions 0/171 dead transitions. [2023-08-30 04:17:30,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 171 transitions, 763 flow [2023-08-30 04:17:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:17:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:17:30,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2065 transitions. [2023-08-30 04:17:30,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42568542568542567 [2023-08-30 04:17:30,278 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2065 transitions. [2023-08-30 04:17:30,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2065 transitions. [2023-08-30 04:17:30,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:30,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2065 transitions. [2023-08-30 04:17:30,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 295.0) internal successors, (2065), 7 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:30,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 693.0) internal successors, (5544), 8 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:30,288 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 693.0) internal successors, (5544), 8 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:30,288 INFO L175 Difference]: Start difference. First operand has 92 places, 76 transitions, 220 flow. Second operand 7 states and 2065 transitions. [2023-08-30 04:17:30,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 171 transitions, 763 flow [2023-08-30 04:17:30,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 171 transitions, 744 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 04:17:30,292 INFO L231 Difference]: Finished difference. Result has 97 places, 79 transitions, 247 flow [2023-08-30 04:17:30,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=247, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2023-08-30 04:17:30,293 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -35 predicate places. [2023-08-30 04:17:30,293 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 247 flow [2023-08-30 04:17:30,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 275.2857142857143) internal successors, (1927), 7 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:30,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:30,294 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:30,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:17:30,294 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:17:30,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:30,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1564572533, now seen corresponding path program 1 times [2023-08-30 04:17:30,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:30,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835687328] [2023-08-30 04:17:30,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:30,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:30,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:30,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835687328] [2023-08-30 04:17:30,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835687328] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:30,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:30,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:17:30,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30785709] [2023-08-30 04:17:30,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:30,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:17:30,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:30,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:17:30,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:17:30,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 693 [2023-08-30 04:17:30,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 247 flow. Second operand has 6 states, 6 states have (on average 278.6666666666667) internal successors, (1672), 6 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:30,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:30,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 693 [2023-08-30 04:17:30,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:31,339 INFO L130 PetriNetUnfolder]: 3920/6680 cut-off events. [2023-08-30 04:17:31,339 INFO L131 PetriNetUnfolder]: For 1380/1380 co-relation queries the response was YES. [2023-08-30 04:17:31,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14566 conditions, 6680 events. 3920/6680 cut-off events. For 1380/1380 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 46069 event pairs, 145 based on Foata normal form. 0/5674 useless extension candidates. Maximal degree in co-relation 14510. Up to 5808 conditions per place. [2023-08-30 04:17:31,366 INFO L137 encePairwiseOnDemand]: 686/693 looper letters, 84 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-30 04:17:31,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 99 transitions, 468 flow [2023-08-30 04:17:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:17:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:17:31,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1185 transitions. [2023-08-30 04:17:31,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274891774891775 [2023-08-30 04:17:31,369 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1185 transitions. [2023-08-30 04:17:31,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1185 transitions. [2023-08-30 04:17:31,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:31,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1185 transitions. [2023-08-30 04:17:31,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.25) internal successors, (1185), 4 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:31,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 693.0) internal successors, (3465), 5 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:31,375 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 693.0) internal successors, (3465), 5 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:31,375 INFO L175 Difference]: Start difference. First operand has 97 places, 79 transitions, 247 flow. Second operand 4 states and 1185 transitions. [2023-08-30 04:17:31,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 99 transitions, 468 flow [2023-08-30 04:17:31,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 99 transitions, 465 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:17:31,379 INFO L231 Difference]: Finished difference. Result has 93 places, 74 transitions, 238 flow [2023-08-30 04:17:31,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=93, PETRI_TRANSITIONS=74} [2023-08-30 04:17:31,380 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -39 predicate places. [2023-08-30 04:17:31,380 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 74 transitions, 238 flow [2023-08-30 04:17:31,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 278.6666666666667) internal successors, (1672), 6 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:31,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:31,381 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:31,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 04:17:31,381 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:17:31,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:31,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1564572977, now seen corresponding path program 1 times [2023-08-30 04:17:31,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:31,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474974058] [2023-08-30 04:17:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:31,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:31,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:31,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474974058] [2023-08-30 04:17:31,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474974058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:31,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:31,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:17:31,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111719711] [2023-08-30 04:17:31,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:31,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:17:31,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:31,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:17:31,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:17:31,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 693 [2023-08-30 04:17:31,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 74 transitions, 238 flow. Second operand has 6 states, 6 states have (on average 284.6666666666667) internal successors, (1708), 6 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:31,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:31,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 693 [2023-08-30 04:17:31,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:32,874 INFO L130 PetriNetUnfolder]: 8039/13737 cut-off events. [2023-08-30 04:17:32,875 INFO L131 PetriNetUnfolder]: For 3394/3394 co-relation queries the response was YES. [2023-08-30 04:17:32,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30457 conditions, 13737 events. 8039/13737 cut-off events. For 3394/3394 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 103528 event pairs, 1314 based on Foata normal form. 0/11466 useless extension candidates. Maximal degree in co-relation 30401. Up to 6304 conditions per place. [2023-08-30 04:17:32,948 INFO L137 encePairwiseOnDemand]: 684/693 looper letters, 144 selfloop transitions, 17 changer transitions 0/174 dead transitions. [2023-08-30 04:17:32,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 174 transitions, 837 flow [2023-08-30 04:17:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:17:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:17:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1836 transitions. [2023-08-30 04:17:32,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2023-08-30 04:17:32,951 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1836 transitions. [2023-08-30 04:17:32,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1836 transitions. [2023-08-30 04:17:32,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:32,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1836 transitions. [2023-08-30 04:17:32,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:32,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 693.0) internal successors, (4851), 7 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:32,959 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 693.0) internal successors, (4851), 7 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:32,960 INFO L175 Difference]: Start difference. First operand has 93 places, 74 transitions, 238 flow. Second operand 6 states and 1836 transitions. [2023-08-30 04:17:32,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 174 transitions, 837 flow [2023-08-30 04:17:32,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 174 transitions, 833 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:17:32,971 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 357 flow [2023-08-30 04:17:32,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=99, PETRI_TRANSITIONS=89} [2023-08-30 04:17:32,972 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -33 predicate places. [2023-08-30 04:17:32,972 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 357 flow [2023-08-30 04:17:32,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 284.6666666666667) internal successors, (1708), 6 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:32,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:32,973 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 04:17:32,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 04:17:32,973 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:17:32,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1622505736, now seen corresponding path program 1 times [2023-08-30 04:17:32,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:32,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361855545] [2023-08-30 04:17:32,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:32,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:17:33,008 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:17:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:17:33,028 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:17:33,028 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:17:33,029 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (60 of 61 remaining) [2023-08-30 04:17:33,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 61 remaining) [2023-08-30 04:17:33,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 61 remaining) [2023-08-30 04:17:33,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 61 remaining) [2023-08-30 04:17:33,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 61 remaining) [2023-08-30 04:17:33,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 61 remaining) [2023-08-30 04:17:33,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 61 remaining) [2023-08-30 04:17:33,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (53 of 61 remaining) [2023-08-30 04:17:33,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 61 remaining) [2023-08-30 04:17:33,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 61 remaining) [2023-08-30 04:17:33,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 61 remaining) [2023-08-30 04:17:33,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 61 remaining) [2023-08-30 04:17:33,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 61 remaining) [2023-08-30 04:17:33,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 61 remaining) [2023-08-30 04:17:33,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 61 remaining) [2023-08-30 04:17:33,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 61 remaining) [2023-08-30 04:17:33,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 61 remaining) [2023-08-30 04:17:33,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 61 remaining) [2023-08-30 04:17:33,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 61 remaining) [2023-08-30 04:17:33,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 61 remaining) [2023-08-30 04:17:33,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 61 remaining) [2023-08-30 04:17:33,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 61 remaining) [2023-08-30 04:17:33,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK (38 of 61 remaining) [2023-08-30 04:17:33,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 61 remaining) [2023-08-30 04:17:33,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 61 remaining) [2023-08-30 04:17:33,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 61 remaining) [2023-08-30 04:17:33,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 61 remaining) [2023-08-30 04:17:33,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 61 remaining) [2023-08-30 04:17:33,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 61 remaining) [2023-08-30 04:17:33,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 61 remaining) [2023-08-30 04:17:33,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 61 remaining) [2023-08-30 04:17:33,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 61 remaining) [2023-08-30 04:17:33,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 61 remaining) [2023-08-30 04:17:33,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 61 remaining) [2023-08-30 04:17:33,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 61 remaining) [2023-08-30 04:17:33,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 61 remaining) [2023-08-30 04:17:33,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 61 remaining) [2023-08-30 04:17:33,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 61 remaining) [2023-08-30 04:17:33,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 61 remaining) [2023-08-30 04:17:33,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 61 remaining) [2023-08-30 04:17:33,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 61 remaining) [2023-08-30 04:17:33,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 61 remaining) [2023-08-30 04:17:33,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 61 remaining) [2023-08-30 04:17:33,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 61 remaining) [2023-08-30 04:17:33,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 61 remaining) [2023-08-30 04:17:33,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 61 remaining) [2023-08-30 04:17:33,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 61 remaining) [2023-08-30 04:17:33,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 61 remaining) [2023-08-30 04:17:33,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 61 remaining) [2023-08-30 04:17:33,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 61 remaining) [2023-08-30 04:17:33,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 61 remaining) [2023-08-30 04:17:33,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 61 remaining) [2023-08-30 04:17:33,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 61 remaining) [2023-08-30 04:17:33,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 61 remaining) [2023-08-30 04:17:33,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 61 remaining) [2023-08-30 04:17:33,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 61 remaining) [2023-08-30 04:17:33,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 61 remaining) [2023-08-30 04:17:33,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 61 remaining) [2023-08-30 04:17:33,039 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 61 remaining) [2023-08-30 04:17:33,039 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 61 remaining) [2023-08-30 04:17:33,039 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 61 remaining) [2023-08-30 04:17:33,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 04:17:33,039 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:33,041 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:17:33,041 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:17:33,083 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:17:33,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 446 transitions, 922 flow [2023-08-30 04:17:33,213 INFO L130 PetriNetUnfolder]: 168/1031 cut-off events. [2023-08-30 04:17:33,213 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:17:33,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 1031 events. 168/1031 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6243 event pairs, 1 based on Foata normal form. 0/706 useless extension candidates. Maximal degree in co-relation 726. Up to 16 conditions per place. [2023-08-30 04:17:33,227 INFO L82 GeneralOperation]: Start removeDead. Operand has 378 places, 446 transitions, 922 flow [2023-08-30 04:17:33,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 378 places, 446 transitions, 922 flow [2023-08-30 04:17:33,236 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:17:33,236 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 378 places, 446 transitions, 922 flow [2023-08-30 04:17:33,236 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 378 places, 446 transitions, 922 flow [2023-08-30 04:17:33,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 446 transitions, 922 flow [2023-08-30 04:17:33,344 INFO L130 PetriNetUnfolder]: 168/1031 cut-off events. [2023-08-30 04:17:33,344 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:17:33,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 1031 events. 168/1031 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6243 event pairs, 1 based on Foata normal form. 0/706 useless extension candidates. Maximal degree in co-relation 726. Up to 16 conditions per place. [2023-08-30 04:17:33,402 INFO L119 LiptonReduction]: Number of co-enabled transitions 120396 [2023-08-30 04:17:38,603 INFO L134 LiptonReduction]: Checked pairs total: 258592 [2023-08-30 04:17:38,604 INFO L136 LiptonReduction]: Total number of compositions: 392 [2023-08-30 04:17:38,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:17:38,605 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;@cbd1fd9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:17:38,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2023-08-30 04:17:38,606 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 04:17:38,606 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:17:38,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:38,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:17:38,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-30 04:17:38,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:38,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2785935, now seen corresponding path program 1 times [2023-08-30 04:17:38,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:38,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480534235] [2023-08-30 04:17:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:38,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:38,624 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 04:17:38,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:38,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480534235] [2023-08-30 04:17:38,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480534235] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:38,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:38,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:17:38,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251641492] [2023-08-30 04:17:38,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:38,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:38,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:38,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:38,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:17:38,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 838 [2023-08-30 04:17:38,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 221 transitions, 472 flow. Second operand has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:38,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:38,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 838 [2023-08-30 04:17:38,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand