./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_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_22-deref_read_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 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --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 04:09:01,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:09:01,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:09:02,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:09:02,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:09:02,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:09:02,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:09:02,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:09:02,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:09:02,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:09:02,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:09:02,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:09:02,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:09:02,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:09:02,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:09:02,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:09:02,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:09:02,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:09:02,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:09:02,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:09:02,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:09:02,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:09:02,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:09:02,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:09:02,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:09:02,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:09:02,089 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:09:02,091 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:09:02,091 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:09:02,092 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:09:02,092 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:09:02,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:09:02,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:09:02,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:09:02,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:09:02,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:09:02,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:09:02,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:09:02,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:09:02,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:09:02,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:09:02,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:09:02,140 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:09:02,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:09:02,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:09:02,142 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:09:02,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:09:02,143 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:09:02,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:09:02,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:09:02,144 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:09:02,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:09:02,145 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:09:02,145 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:09:02,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:09:02,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:09:02,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:09:02,146 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:09:02,146 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:09:02,146 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:09:02,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:09:02,146 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:09:02,147 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:09:02,147 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:09:02,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:09:02,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:09:02,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:09:02,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:09:02,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:09:02,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:09:02,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:09:02,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:09:02,149 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:09:02,149 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:09:02,149 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:09:02,149 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:09:02,150 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:09:02,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:09:02,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:09:02,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:09:02,465 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:09:02,465 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:09:02,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-08-30 04:09:03,631 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:09:03,910 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:09:03,911 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-08-30 04:09:03,926 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e436e72a/6612e03cc75b4be9bff4ba9602f9a7a9/FLAGc7d80cbfa [2023-08-30 04:09:03,939 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e436e72a/6612e03cc75b4be9bff4ba9602f9a7a9 [2023-08-30 04:09:03,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:09:03,945 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:09:03,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:09:03,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:09:03,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:09:03,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:09:03" (1/1) ... [2023-08-30 04:09:03,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a8b2c0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:03, skipping insertion in model container [2023-08-30 04:09:03,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:09:03" (1/1) ... [2023-08-30 04:09:03,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:09:03,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:09:04,253 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_22-deref_read_racefree.i[30176,30189] [2023-08-30 04:09:04,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:09:04,299 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:09:04,354 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_22-deref_read_racefree.i[30176,30189] [2023-08-30 04:09:04,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:09:04,468 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:09:04,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:04 WrapperNode [2023-08-30 04:09:04,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:09:04,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:09:04,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:09:04,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:09:04,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:04" (1/1) ... [2023-08-30 04:09:04,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:04" (1/1) ... [2023-08-30 04:09:04,534 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2023-08-30 04:09:04,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:09:04,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:09:04,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:09:04,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:09:04,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:04" (1/1) ... [2023-08-30 04:09:04,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:04" (1/1) ... [2023-08-30 04:09:04,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:04" (1/1) ... [2023-08-30 04:09:04,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:04" (1/1) ... [2023-08-30 04:09:04,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:04" (1/1) ... [2023-08-30 04:09:04,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:04" (1/1) ... [2023-08-30 04:09:04,576 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:04" (1/1) ... [2023-08-30 04:09:04,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:04" (1/1) ... [2023-08-30 04:09:04,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:09:04,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:09:04,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:09:04,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:09:04,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:04" (1/1) ... [2023-08-30 04:09:04,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:09:04,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:09:04,621 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 04:09:04,644 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 04:09:04,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:09:04,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:09:04,662 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:09:04,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:09:04,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:09:04,663 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:09:04,663 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:09:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:09:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:09:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:09:04,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:09:04,666 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 04:09:04,869 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:09:04,871 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:09:05,142 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:09:05,153 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:09:05,155 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-30 04:09:05,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:09:05 BoogieIcfgContainer [2023-08-30 04:09:05,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:09:05,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:09:05,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:09:05,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:09:05,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:09:03" (1/3) ... [2023-08-30 04:09:05,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704935dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:09:05, skipping insertion in model container [2023-08-30 04:09:05,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:04" (2/3) ... [2023-08-30 04:09:05,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704935dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:09:05, skipping insertion in model container [2023-08-30 04:09:05,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:09:05" (3/3) ... [2023-08-30 04:09:05,166 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2023-08-30 04:09:05,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:09:05,189 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-30 04:09:05,190 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:09:05,249 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 04:09:05,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 116 transitions, 237 flow [2023-08-30 04:09:05,326 INFO L130 PetriNetUnfolder]: 14/154 cut-off events. [2023-08-30 04:09:05,327 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:09:05,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 154 events. 14/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 432 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-08-30 04:09:05,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 116 transitions, 237 flow [2023-08-30 04:09:05,338 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 116 transitions, 237 flow [2023-08-30 04:09:05,341 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:09:05,350 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 116 transitions, 237 flow [2023-08-30 04:09:05,353 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 116 transitions, 237 flow [2023-08-30 04:09:05,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 116 transitions, 237 flow [2023-08-30 04:09:05,393 INFO L130 PetriNetUnfolder]: 14/154 cut-off events. [2023-08-30 04:09:05,395 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:09:05,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 154 events. 14/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 432 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-08-30 04:09:05,402 INFO L119 LiptonReduction]: Number of co-enabled transitions 3520 [2023-08-30 04:09:08,738 INFO L134 LiptonReduction]: Checked pairs total: 8210 [2023-08-30 04:09:08,738 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-30 04:09:08,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:09:08,758 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;@57d5a019, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:09:08,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-30 04:09:08,762 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:09:08,762 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:09:08,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:08,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:09:08,763 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 04:09:08,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:08,768 INFO L85 PathProgramCache]: Analyzing trace with hash 14180, now seen corresponding path program 1 times [2023-08-30 04:09:08,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:08,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786269241] [2023-08-30 04:09:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:08,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:09,007 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 04:09:09,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:09,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786269241] [2023-08-30 04:09:09,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786269241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:09:09,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:09:09,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:09:09,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239440771] [2023-08-30 04:09:09,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:09:09,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:09:09,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:09,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:09:09,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:09:09,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 214 [2023-08-30 04:09:09,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 45 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:09,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:09,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 214 [2023-08-30 04:09:09,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:09,260 INFO L130 PetriNetUnfolder]: 156/395 cut-off events. [2023-08-30 04:09:09,261 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:09:09,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 395 events. 156/395 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1991 event pairs, 120 based on Foata normal form. 14/271 useless extension candidates. Maximal degree in co-relation 713. Up to 273 conditions per place. [2023-08-30 04:09:09,265 INFO L137 encePairwiseOnDemand]: 201/214 looper letters, 37 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-30 04:09:09,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 46 transitions, 175 flow [2023-08-30 04:09:09,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:09:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:09:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2023-08-30 04:09:09,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482866043613707 [2023-08-30 04:09:09,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2023-08-30 04:09:09,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2023-08-30 04:09:09,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:09,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2023-08-30 04:09:09,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:09,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:09,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:09,310 INFO L175 Difference]: Start difference. First operand has 40 places, 45 transitions, 95 flow. Second operand 3 states and 352 transitions. [2023-08-30 04:09:09,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 46 transitions, 175 flow [2023-08-30 04:09:09,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 46 transitions, 175 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:09:09,317 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 77 flow [2023-08-30 04:09:09,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-08-30 04:09:09,324 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2023-08-30 04:09:09,324 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 77 flow [2023-08-30 04:09:09,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:09,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:09,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:09:09,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:09:09,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 04:09:09,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:09,328 INFO L85 PathProgramCache]: Analyzing trace with hash 14179, now seen corresponding path program 1 times [2023-08-30 04:09:09,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:09,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769827474] [2023-08-30 04:09:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:09,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:09:09,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:09,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769827474] [2023-08-30 04:09:09,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769827474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:09:09,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:09:09,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:09:09,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221843526] [2023-08-30 04:09:09,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:09:09,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:09:09,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:09,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:09:09,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:09:09,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 214 [2023-08-30 04:09:09,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:09,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:09,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 214 [2023-08-30 04:09:09,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:09,674 INFO L130 PetriNetUnfolder]: 156/387 cut-off events. [2023-08-30 04:09:09,674 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 04:09:09,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 749 conditions, 387 events. 156/387 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1859 event pairs, 132 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 732. Up to 326 conditions per place. [2023-08-30 04:09:09,679 INFO L137 encePairwiseOnDemand]: 210/214 looper letters, 38 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-30 04:09:09,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 183 flow [2023-08-30 04:09:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:09:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:09:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2023-08-30 04:09:09,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5280373831775701 [2023-08-30 04:09:09,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2023-08-30 04:09:09,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2023-08-30 04:09:09,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:09,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2023-08-30 04:09:09,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:09,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:09,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:09,688 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 77 flow. Second operand 3 states and 339 transitions. [2023-08-30 04:09:09,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 183 flow [2023-08-30 04:09:09,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 179 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:09:09,690 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 83 flow [2023-08-30 04:09:09,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-08-30 04:09:09,691 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-08-30 04:09:09,692 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 83 flow [2023-08-30 04:09:09,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:09,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:09,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:09:09,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:09:09,693 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 04:09:09,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:09,696 INFO L85 PathProgramCache]: Analyzing trace with hash 422782724, now seen corresponding path program 1 times [2023-08-30 04:09:09,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:09,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357672132] [2023-08-30 04:09:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:09,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:09,852 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 04:09:09,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:09,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357672132] [2023-08-30 04:09:09,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357672132] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:09:09,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050968876] [2023-08-30 04:09:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:09,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:09:09,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:09:09,861 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 04:09:09,891 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 04:09:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:09,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:09:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:09:10,028 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 04:09:10,086 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 04:09:10,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:09:10,142 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 04:09:10,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050968876] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:09:10,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:09:10,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:09:10,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146401962] [2023-08-30 04:09:10,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:09:10,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:09:10,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:10,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:09:10,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:09:10,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 214 [2023-08-30 04:09:10,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 83 flow. Second operand has 7 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:10,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:10,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 214 [2023-08-30 04:09:10,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:10,333 INFO L130 PetriNetUnfolder]: 24/80 cut-off events. [2023-08-30 04:09:10,333 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 04:09:10,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 80 events. 24/80 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 214 event pairs, 11 based on Foata normal form. 13/81 useless extension candidates. Maximal degree in co-relation 163. Up to 50 conditions per place. [2023-08-30 04:09:10,334 INFO L137 encePairwiseOnDemand]: 210/214 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-30 04:09:10,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 139 flow [2023-08-30 04:09:10,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:09:10,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:09:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 415 transitions. [2023-08-30 04:09:10,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4848130841121495 [2023-08-30 04:09:10,336 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 415 transitions. [2023-08-30 04:09:10,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 415 transitions. [2023-08-30 04:09:10,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:10,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 415 transitions. [2023-08-30 04:09:10,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:10,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:10,340 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:10,340 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 83 flow. Second operand 4 states and 415 transitions. [2023-08-30 04:09:10,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 139 flow [2023-08-30 04:09:10,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 133 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:09:10,341 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 53 flow [2023-08-30 04:09:10,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-30 04:09:10,342 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -12 predicate places. [2023-08-30 04:09:10,342 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 53 flow [2023-08-30 04:09:10,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:10,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:10,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:09:10,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 04:09:10,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:09:10,548 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 04:09:10,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:10,549 INFO L85 PathProgramCache]: Analyzing trace with hash 221351048, now seen corresponding path program 1 times [2023-08-30 04:09:10,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:10,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915735179] [2023-08-30 04:09:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:10,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:10,704 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 04:09:10,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:10,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915735179] [2023-08-30 04:09:10,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915735179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:09:10,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:09:10,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:09:10,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018365968] [2023-08-30 04:09:10,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:09:10,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:09:10,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:10,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:09:10,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:09:10,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 214 [2023-08-30 04:09:10,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:10,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:10,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 214 [2023-08-30 04:09:10,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:10,797 INFO L130 PetriNetUnfolder]: 20/69 cut-off events. [2023-08-30 04:09:10,801 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 04:09:10,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 69 events. 20/69 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 162 event pairs, 20 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 126. Up to 55 conditions per place. [2023-08-30 04:09:10,802 INFO L137 encePairwiseOnDemand]: 211/214 looper letters, 13 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-30 04:09:10,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 77 flow [2023-08-30 04:09:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:09:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:09:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-08-30 04:09:10,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735202492211838 [2023-08-30 04:09:10,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-08-30 04:09:10,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-08-30 04:09:10,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:10,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-08-30 04:09:10,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:10,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:10,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:10,807 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 53 flow. Second operand 3 states and 304 transitions. [2023-08-30 04:09:10,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 77 flow [2023-08-30 04:09:10,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 20 transitions, 74 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:09:10,809 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 48 flow [2023-08-30 04:09:10,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2023-08-30 04:09:10,811 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -14 predicate places. [2023-08-30 04:09:10,811 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 48 flow [2023-08-30 04:09:10,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:10,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:10,811 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:09:10,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:09:10,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 04:09:10,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:10,813 INFO L85 PathProgramCache]: Analyzing trace with hash 221362933, now seen corresponding path program 1 times [2023-08-30 04:09:10,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:10,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256559132] [2023-08-30 04:09:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:10,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:09:10,833 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:09:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:09:10,873 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:09:10,873 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:09:10,876 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (22 of 23 remaining) [2023-08-30 04:09:10,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-30 04:09:10,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-30 04:09:10,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-30 04:09:10,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-30 04:09:10,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (17 of 23 remaining) [2023-08-30 04:09:10,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 23 remaining) [2023-08-30 04:09:10,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-30 04:09:10,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-30 04:09:10,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 23 remaining) [2023-08-30 04:09:10,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 23 remaining) [2023-08-30 04:09:10,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 23 remaining) [2023-08-30 04:09:10,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-30 04:09:10,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-30 04:09:10,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 23 remaining) [2023-08-30 04:09:10,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2023-08-30 04:09:10,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-30 04:09:10,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-30 04:09:10,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-30 04:09:10,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-30 04:09:10,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 23 remaining) [2023-08-30 04:09:10,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-30 04:09:10,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-30 04:09:10,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:09:10,886 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 04:09:10,889 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:09:10,890 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:09:10,921 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 04:09:10,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 157 transitions, 326 flow [2023-08-30 04:09:10,959 INFO L130 PetriNetUnfolder]: 24/238 cut-off events. [2023-08-30 04:09:10,959 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 04:09:10,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 238 events. 24/238 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 808 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 155. Up to 6 conditions per place. [2023-08-30 04:09:10,962 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 157 transitions, 326 flow [2023-08-30 04:09:10,965 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 157 transitions, 326 flow [2023-08-30 04:09:10,966 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:09:10,966 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 157 transitions, 326 flow [2023-08-30 04:09:10,966 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 157 transitions, 326 flow [2023-08-30 04:09:10,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 157 transitions, 326 flow [2023-08-30 04:09:10,993 INFO L130 PetriNetUnfolder]: 24/238 cut-off events. [2023-08-30 04:09:10,993 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 04:09:10,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 238 events. 24/238 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 808 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 155. Up to 6 conditions per place. [2023-08-30 04:09:11,004 INFO L119 LiptonReduction]: Number of co-enabled transitions 10320 [2023-08-30 04:09:14,279 INFO L134 LiptonReduction]: Checked pairs total: 27377 [2023-08-30 04:09:14,279 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-30 04:09:14,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:09:14,282 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;@57d5a019, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:09:14,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-08-30 04:09:14,283 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:09:14,283 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:09:14,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:14,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:09:14,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 04:09:14,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:14,284 INFO L85 PathProgramCache]: Analyzing trace with hash 24693, now seen corresponding path program 1 times [2023-08-30 04:09:14,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:14,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902806839] [2023-08-30 04:09:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:14,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:14,329 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 04:09:14,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:14,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902806839] [2023-08-30 04:09:14,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902806839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:09:14,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:09:14,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:09:14,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352490194] [2023-08-30 04:09:14,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:09:14,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:09:14,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:14,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:09:14,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:09:14,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 288 [2023-08-30 04:09:14,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:14,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:14,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 288 [2023-08-30 04:09:14,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:15,164 INFO L130 PetriNetUnfolder]: 5083/8529 cut-off events. [2023-08-30 04:09:15,165 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-30 04:09:15,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16623 conditions, 8529 events. 5083/8529 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 60031 event pairs, 3952 based on Foata normal form. 406/6141 useless extension candidates. Maximal degree in co-relation 11063. Up to 6272 conditions per place. [2023-08-30 04:09:15,227 INFO L137 encePairwiseOnDemand]: 267/288 looper letters, 66 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-30 04:09:15,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 306 flow [2023-08-30 04:09:15,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:09:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:09:15,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-08-30 04:09:15,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775462962962963 [2023-08-30 04:09:15,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-08-30 04:09:15,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-08-30 04:09:15,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:15,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-08-30 04:09:15,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:15,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:15,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:15,249 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 156 flow. Second operand 3 states and 499 transitions. [2023-08-30 04:09:15,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 306 flow [2023-08-30 04:09:15,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 79 transitions, 304 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 04:09:15,251 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 120 flow [2023-08-30 04:09:15,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2023-08-30 04:09:15,252 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -3 predicate places. [2023-08-30 04:09:15,252 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 120 flow [2023-08-30 04:09:15,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:15,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:15,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:09:15,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 04:09:15,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 04:09:15,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:15,254 INFO L85 PathProgramCache]: Analyzing trace with hash 24694, now seen corresponding path program 1 times [2023-08-30 04:09:15,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:15,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319073365] [2023-08-30 04:09:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:15,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:15,298 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 04:09:15,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:15,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319073365] [2023-08-30 04:09:15,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319073365] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:09:15,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:09:15,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:09:15,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372230615] [2023-08-30 04:09:15,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:09:15,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:09:15,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:15,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:09:15,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:09:15,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 288 [2023-08-30 04:09:15,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:15,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:15,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 288 [2023-08-30 04:09:15,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:16,042 INFO L130 PetriNetUnfolder]: 5083/8559 cut-off events. [2023-08-30 04:09:16,042 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-08-30 04:09:16,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16849 conditions, 8559 events. 5083/8559 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 60105 event pairs, 4654 based on Foata normal form. 0/5776 useless extension candidates. Maximal degree in co-relation 13048. Up to 8010 conditions per place. [2023-08-30 04:09:16,103 INFO L137 encePairwiseOnDemand]: 284/288 looper letters, 55 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-08-30 04:09:16,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 68 transitions, 264 flow [2023-08-30 04:09:16,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:09:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:09:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-30 04:09:16,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2023-08-30 04:09:16,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-30 04:09:16,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-30 04:09:16,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:16,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-30 04:09:16,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:16,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:16,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:16,111 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 120 flow. Second operand 3 states and 458 transitions. [2023-08-30 04:09:16,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 68 transitions, 264 flow [2023-08-30 04:09:16,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 68 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:09:16,118 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 130 flow [2023-08-30 04:09:16,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2023-08-30 04:09:16,119 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2023-08-30 04:09:16,120 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 130 flow [2023-08-30 04:09:16,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:16,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:16,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:09:16,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 04:09:16,121 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 04:09:16,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:16,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1350418392, now seen corresponding path program 1 times [2023-08-30 04:09:16,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:16,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145065009] [2023-08-30 04:09:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:16,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:16,233 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 04:09:16,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:16,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145065009] [2023-08-30 04:09:16,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145065009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:09:16,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:09:16,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:09:16,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365154214] [2023-08-30 04:09:16,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:09:16,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:09:16,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:16,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:09:16,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:09:16,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 288 [2023-08-30 04:09:16,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:16,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:16,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 288 [2023-08-30 04:09:16,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:16,856 INFO L130 PetriNetUnfolder]: 3707/6310 cut-off events. [2023-08-30 04:09:16,857 INFO L131 PetriNetUnfolder]: For 341/341 co-relation queries the response was YES. [2023-08-30 04:09:16,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12732 conditions, 6310 events. 3707/6310 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 42393 event pairs, 3157 based on Foata normal form. 350/4900 useless extension candidates. Maximal degree in co-relation 12642. Up to 5031 conditions per place. [2023-08-30 04:09:16,890 INFO L137 encePairwiseOnDemand]: 281/288 looper letters, 58 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-08-30 04:09:16,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 288 flow [2023-08-30 04:09:16,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:09:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:09:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 572 transitions. [2023-08-30 04:09:16,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965277777777778 [2023-08-30 04:09:16,893 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 572 transitions. [2023-08-30 04:09:16,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 572 transitions. [2023-08-30 04:09:16,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:16,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 572 transitions. [2023-08-30 04:09:16,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:16,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:16,897 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:16,898 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 130 flow. Second operand 4 states and 572 transitions. [2023-08-30 04:09:16,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 288 flow [2023-08-30 04:09:16,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:09:16,900 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 126 flow [2023-08-30 04:09:16,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2023-08-30 04:09:16,900 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -4 predicate places. [2023-08-30 04:09:16,901 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 126 flow [2023-08-30 04:09:16,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:16,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:16,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:09:16,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:09:16,902 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 04:09:16,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:16,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1350201898, now seen corresponding path program 1 times [2023-08-30 04:09:16,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:16,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460858901] [2023-08-30 04:09:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:16,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:16,959 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 04:09:16,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:16,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460858901] [2023-08-30 04:09:16,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460858901] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:09:16,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377587229] [2023-08-30 04:09:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:16,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:09:16,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:09:16,962 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 04:09:16,964 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 04:09:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:17,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:09:17,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:09:17,038 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 04:09:17,081 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 04:09:17,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:09:17,132 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 04:09:17,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377587229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:09:17,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:09:17,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:09:17,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280276050] [2023-08-30 04:09:17,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:09:17,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:09:17,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:17,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:09:17,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:09:17,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 288 [2023-08-30 04:09:17,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 126 flow. Second operand has 8 states, 8 states have (on average 130.875) internal successors, (1047), 8 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:17,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:17,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 288 [2023-08-30 04:09:17,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:17,602 INFO L130 PetriNetUnfolder]: 682/1361 cut-off events. [2023-08-30 04:09:17,603 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2023-08-30 04:09:17,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2859 conditions, 1361 events. 682/1361 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 8106 event pairs, 0 based on Foata normal form. 156/1318 useless extension candidates. Maximal degree in co-relation 2849. Up to 816 conditions per place. [2023-08-30 04:09:17,611 INFO L137 encePairwiseOnDemand]: 284/288 looper letters, 60 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2023-08-30 04:09:17,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 73 transitions, 290 flow [2023-08-30 04:09:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:09:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:09:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 712 transitions. [2023-08-30 04:09:17,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2023-08-30 04:09:17,614 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 712 transitions. [2023-08-30 04:09:17,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 712 transitions. [2023-08-30 04:09:17,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:17,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 712 transitions. [2023-08-30 04:09:17,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.4) internal successors, (712), 5 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 04:09:17,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:17,619 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:17,619 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 126 flow. Second operand 5 states and 712 transitions. [2023-08-30 04:09:17,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 73 transitions, 290 flow [2023-08-30 04:09:17,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 289 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:09:17,621 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 99 flow [2023-08-30 04:09:17,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-08-30 04:09:17,622 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -14 predicate places. [2023-08-30 04:09:17,622 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 99 flow [2023-08-30 04:09:17,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 130.875) internal successors, (1047), 8 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:17,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:17,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:09:17,632 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 04:09:17,828 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,SelfDestructingSolverStorable8 [2023-08-30 04:09:17,829 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 04:09:17,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:17,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1086706904, now seen corresponding path program 1 times [2023-08-30 04:09:17,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:17,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490503595] [2023-08-30 04:09:17,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:17,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:17,903 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 04:09:17,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:17,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490503595] [2023-08-30 04:09:17,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490503595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:09:17,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:09:17,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:09:17,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358980970] [2023-08-30 04:09:17,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:09:17,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:09:17,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:17,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:09:17,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:09:18,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 288 [2023-08-30 04:09:18,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:18,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:18,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 288 [2023-08-30 04:09:18,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:18,102 INFO L130 PetriNetUnfolder]: 468/846 cut-off events. [2023-08-30 04:09:18,103 INFO L131 PetriNetUnfolder]: For 358/358 co-relation queries the response was YES. [2023-08-30 04:09:18,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 846 events. 468/846 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3889 event pairs, 468 based on Foata normal form. 0/838 useless extension candidates. Maximal degree in co-relation 1899. Up to 800 conditions per place. [2023-08-30 04:09:18,107 INFO L137 encePairwiseOnDemand]: 279/288 looper letters, 23 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 04:09:18,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 30 transitions, 131 flow [2023-08-30 04:09:18,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:09:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:09:18,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-08-30 04:09:18,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4351851851851852 [2023-08-30 04:09:18,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-08-30 04:09:18,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-08-30 04:09:18,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:18,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-08-30 04:09:18,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:18,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:18,113 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:18,113 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 99 flow. Second operand 3 states and 376 transitions. [2023-08-30 04:09:18,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 30 transitions, 131 flow [2023-08-30 04:09:18,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 124 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 04:09:18,115 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 78 flow [2023-08-30 04:09:18,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-30 04:09:18,116 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -23 predicate places. [2023-08-30 04:09:18,116 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 78 flow [2023-08-30 04:09:18,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:18,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:18,116 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 04:09:18,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:09:18,117 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-30 04:09:18,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:18,117 INFO L85 PathProgramCache]: Analyzing trace with hash -533541916, now seen corresponding path program 1 times [2023-08-30 04:09:18,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:18,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144410037] [2023-08-30 04:09:18,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:18,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:09:18,128 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:09:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:09:18,140 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:09:18,141 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:09:18,141 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (30 of 31 remaining) [2023-08-30 04:09:18,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 31 remaining) [2023-08-30 04:09:18,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 31 remaining) [2023-08-30 04:09:18,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 31 remaining) [2023-08-30 04:09:18,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 31 remaining) [2023-08-30 04:09:18,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (25 of 31 remaining) [2023-08-30 04:09:18,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 31 remaining) [2023-08-30 04:09:18,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 31 remaining) [2023-08-30 04:09:18,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 31 remaining) [2023-08-30 04:09:18,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 31 remaining) [2023-08-30 04:09:18,143 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 31 remaining) [2023-08-30 04:09:18,143 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 31 remaining) [2023-08-30 04:09:18,143 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 31 remaining) [2023-08-30 04:09:18,143 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 31 remaining) [2023-08-30 04:09:18,143 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 31 remaining) [2023-08-30 04:09:18,143 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 31 remaining) [2023-08-30 04:09:18,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 31 remaining) [2023-08-30 04:09:18,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 31 remaining) [2023-08-30 04:09:18,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 31 remaining) [2023-08-30 04:09:18,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 31 remaining) [2023-08-30 04:09:18,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 31 remaining) [2023-08-30 04:09:18,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 31 remaining) [2023-08-30 04:09:18,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 31 remaining) [2023-08-30 04:09:18,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 31 remaining) [2023-08-30 04:09:18,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 31 remaining) [2023-08-30 04:09:18,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 31 remaining) [2023-08-30 04:09:18,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 31 remaining) [2023-08-30 04:09:18,146 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 31 remaining) [2023-08-30 04:09:18,146 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 31 remaining) [2023-08-30 04:09:18,146 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 31 remaining) [2023-08-30 04:09:18,146 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 31 remaining) [2023-08-30 04:09:18,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 04:09:18,146 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-30 04:09:18,147 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:09:18,147 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:09:18,164 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 04:09:18,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 198 transitions, 417 flow [2023-08-30 04:09:18,200 INFO L130 PetriNetUnfolder]: 34/322 cut-off events. [2023-08-30 04:09:18,200 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 04:09:18,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 322 events. 34/322 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1168 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 242. Up to 8 conditions per place. [2023-08-30 04:09:18,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 198 transitions, 417 flow [2023-08-30 04:09:18,208 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 198 transitions, 417 flow [2023-08-30 04:09:18,208 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:09:18,208 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 198 transitions, 417 flow [2023-08-30 04:09:18,209 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 198 transitions, 417 flow [2023-08-30 04:09:18,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 198 transitions, 417 flow [2023-08-30 04:09:18,241 INFO L130 PetriNetUnfolder]: 34/322 cut-off events. [2023-08-30 04:09:18,242 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 04:09:18,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 322 events. 34/322 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1168 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 242. Up to 8 conditions per place. [2023-08-30 04:09:18,258 INFO L119 LiptonReduction]: Number of co-enabled transitions 20400 [2023-08-30 04:09:21,614 INFO L134 LiptonReduction]: Checked pairs total: 57171 [2023-08-30 04:09:21,614 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-30 04:09:21,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:09:21,616 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;@57d5a019, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:09:21,617 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-08-30 04:09:21,618 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:09:21,618 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:09:21,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:21,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:09:21,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:09:21,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:21,619 INFO L85 PathProgramCache]: Analyzing trace with hash 37511, now seen corresponding path program 1 times [2023-08-30 04:09:21,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:21,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213992428] [2023-08-30 04:09:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:21,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:21,701 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 04:09:21,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:21,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213992428] [2023-08-30 04:09:21,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213992428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:09:21,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:09:21,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:09:21,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13257747] [2023-08-30 04:09:21,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:09:21,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:09:21,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:21,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:09:21,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:09:21,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 360 [2023-08-30 04:09:21,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 98 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:21,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:21,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 360 [2023-08-30 04:09:21,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:32,453 INFO L130 PetriNetUnfolder]: 117572/168596 cut-off events. [2023-08-30 04:09:32,454 INFO L131 PetriNetUnfolder]: For 1277/1277 co-relation queries the response was YES. [2023-08-30 04:09:32,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331398 conditions, 168596 events. 117572/168596 cut-off events. For 1277/1277 co-relation queries the response was YES. Maximal size of possible extension queue 5298. Compared 1340664 event pairs, 111233 based on Foata normal form. 9255/121461 useless extension candidates. Maximal degree in co-relation 136873. Up to 161869 conditions per place. [2023-08-30 04:09:33,685 INFO L137 encePairwiseOnDemand]: 330/360 looper letters, 71 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-30 04:09:33,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 88 transitions, 343 flow [2023-08-30 04:09:33,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:09:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:09:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 610 transitions. [2023-08-30 04:09:33,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2023-08-30 04:09:33,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 610 transitions. [2023-08-30 04:09:33,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 610 transitions. [2023-08-30 04:09:33,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:33,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 610 transitions. [2023-08-30 04:09:33,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:33,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:33,693 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:33,694 INFO L175 Difference]: Start difference. First operand has 85 places, 98 transitions, 217 flow. Second operand 3 states and 610 transitions. [2023-08-30 04:09:33,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 88 transitions, 343 flow [2023-08-30 04:09:33,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 337 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 04:09:33,701 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 173 flow [2023-08-30 04:09:33,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2023-08-30 04:09:33,702 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -3 predicate places. [2023-08-30 04:09:33,702 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 173 flow [2023-08-30 04:09:33,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:33,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:33,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:09:33,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 04:09:33,703 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:09:33,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:33,703 INFO L85 PathProgramCache]: Analyzing trace with hash 37512, now seen corresponding path program 1 times [2023-08-30 04:09:33,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:33,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376533482] [2023-08-30 04:09:33,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:33,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:33,727 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 04:09:33,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:33,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376533482] [2023-08-30 04:09:33,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376533482] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:09:33,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:09:33,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:09:33,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432495253] [2023-08-30 04:09:33,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:09:33,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:09:33,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:33,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:09:33,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:09:33,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 360 [2023-08-30 04:09:33,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:33,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:33,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 360 [2023-08-30 04:09:33,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:43,422 INFO L130 PetriNetUnfolder]: 109551/156306 cut-off events. [2023-08-30 04:09:43,423 INFO L131 PetriNetUnfolder]: For 6472/6472 co-relation queries the response was YES. [2023-08-30 04:09:43,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316779 conditions, 156306 events. 109551/156306 cut-off events. For 6472/6472 co-relation queries the response was YES. Maximal size of possible extension queue 4895. Compared 1226921 event pairs, 85488 based on Foata normal form. 0/108610 useless extension candidates. Maximal degree in co-relation 316676. Up to 117984 conditions per place. [2023-08-30 04:09:44,377 INFO L137 encePairwiseOnDemand]: 357/360 looper letters, 94 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-30 04:09:44,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 111 transitions, 441 flow [2023-08-30 04:09:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:09:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:09:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-08-30 04:09:44,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-08-30 04:09:44,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-08-30 04:09:44,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-08-30 04:09:44,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:44,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-08-30 04:09:44,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:44,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:44,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:44,384 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 173 flow. Second operand 3 states and 594 transitions. [2023-08-30 04:09:44,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 111 transitions, 441 flow [2023-08-30 04:09:44,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 111 transitions, 439 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:09:44,390 INFO L231 Difference]: Finished difference. Result has 82 places, 72 transitions, 173 flow [2023-08-30 04:09:44,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=82, PETRI_TRANSITIONS=72} [2023-08-30 04:09:44,391 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -3 predicate places. [2023-08-30 04:09:44,391 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 72 transitions, 173 flow [2023-08-30 04:09:44,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:44,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:44,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:09:44,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 04:09:44,392 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:09:44,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:44,393 INFO L85 PathProgramCache]: Analyzing trace with hash 314313371, now seen corresponding path program 1 times [2023-08-30 04:09:44,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:44,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219105832] [2023-08-30 04:09:44,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:44,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:44,449 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 04:09:44,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:44,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219105832] [2023-08-30 04:09:44,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219105832] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:09:44,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401419174] [2023-08-30 04:09:44,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:44,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:09:44,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:09:44,452 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 04:09:44,470 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 04:09:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:44,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:09:44,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:09:44,561 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 04:09:44,598 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 04:09:44,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:09:44,653 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 04:09:44,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401419174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:09:44,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:09:44,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:09:44,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600577029] [2023-08-30 04:09:44,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:09:44,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:09:44,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:44,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:09:44,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:09:44,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 360 [2023-08-30 04:09:44,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 72 transitions, 173 flow. Second operand has 8 states, 8 states have (on average 165.875) internal successors, (1327), 8 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:44,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:44,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 360 [2023-08-30 04:09:44,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:53,211 INFO L130 PetriNetUnfolder]: 101400/146382 cut-off events. [2023-08-30 04:09:53,211 INFO L131 PetriNetUnfolder]: For 6133/6133 co-relation queries the response was YES. [2023-08-30 04:09:53,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298265 conditions, 146382 events. 101400/146382 cut-off events. For 6133/6133 co-relation queries the response was YES. Maximal size of possible extension queue 4902. Compared 1211598 event pairs, 165 based on Foata normal form. 14/105118 useless extension candidates. Maximal degree in co-relation 229626. Up to 103880 conditions per place. [2023-08-30 04:09:54,163 INFO L137 encePairwiseOnDemand]: 354/360 looper letters, 179 selfloop transitions, 8 changer transitions 0/202 dead transitions. [2023-08-30 04:09:54,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 202 transitions, 811 flow [2023-08-30 04:09:54,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:09:54,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:09:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1175 transitions. [2023-08-30 04:09:54,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439814814814815 [2023-08-30 04:09:54,167 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1175 transitions. [2023-08-30 04:09:54,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1175 transitions. [2023-08-30 04:09:54,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:54,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1175 transitions. [2023-08-30 04:09:54,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.83333333333334) internal successors, (1175), 6 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:54,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:54,175 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:54,175 INFO L175 Difference]: Start difference. First operand has 82 places, 72 transitions, 173 flow. Second operand 6 states and 1175 transitions. [2023-08-30 04:09:54,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 202 transitions, 811 flow [2023-08-30 04:09:55,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 202 transitions, 805 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:09:55,428 INFO L231 Difference]: Finished difference. Result has 85 places, 74 transitions, 193 flow [2023-08-30 04:09:55,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=85, PETRI_TRANSITIONS=74} [2023-08-30 04:09:55,428 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 0 predicate places. [2023-08-30 04:09:55,428 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 74 transitions, 193 flow [2023-08-30 04:09:55,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 165.875) internal successors, (1327), 8 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:55,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:55,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:09:55,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 04:09:55,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:09:55,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:09:55,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:55,631 INFO L85 PathProgramCache]: Analyzing trace with hash 314596151, now seen corresponding path program 1 times [2023-08-30 04:09:55,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:55,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709506266] [2023-08-30 04:09:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:55,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:55,697 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 04:09:55,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:55,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709506266] [2023-08-30 04:09:55,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709506266] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:09:55,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:09:55,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:09:55,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937231079] [2023-08-30 04:09:55,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:09:55,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:09:55,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:55,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:09:55,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:09:55,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 360 [2023-08-30 04:09:55,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 74 transitions, 193 flow. Second operand has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:55,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:55,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 360 [2023-08-30 04:09:55,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:10:01,042 INFO L130 PetriNetUnfolder]: 63514/91273 cut-off events. [2023-08-30 04:10:01,042 INFO L131 PetriNetUnfolder]: For 13232/13232 co-relation queries the response was YES. [2023-08-30 04:10:01,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191071 conditions, 91273 events. 63514/91273 cut-off events. For 13232/13232 co-relation queries the response was YES. Maximal size of possible extension queue 2870. Compared 683392 event pairs, 53482 based on Foata normal form. 5931/73017 useless extension candidates. Maximal degree in co-relation 142008. Up to 74112 conditions per place. [2023-08-30 04:10:01,572 INFO L137 encePairwiseOnDemand]: 351/360 looper letters, 81 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2023-08-30 04:10:01,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 101 transitions, 419 flow [2023-08-30 04:10:01,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:10:01,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:10:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 718 transitions. [2023-08-30 04:10:01,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986111111111111 [2023-08-30 04:10:01,755 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 718 transitions. [2023-08-30 04:10:01,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 718 transitions. [2023-08-30 04:10:01,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:10:01,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 718 transitions. [2023-08-30 04:10:01,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:01,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 360.0) internal successors, (1800), 5 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:01,759 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 360.0) internal successors, (1800), 5 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:01,760 INFO L175 Difference]: Start difference. First operand has 85 places, 74 transitions, 193 flow. Second operand 4 states and 718 transitions. [2023-08-30 04:10:01,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 101 transitions, 419 flow [2023-08-30 04:10:01,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 101 transitions, 410 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 04:10:01,771 INFO L231 Difference]: Finished difference. Result has 80 places, 68 transitions, 182 flow [2023-08-30 04:10:01,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=80, PETRI_TRANSITIONS=68} [2023-08-30 04:10:01,773 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -5 predicate places. [2023-08-30 04:10:01,773 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 68 transitions, 182 flow [2023-08-30 04:10:01,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:01,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:01,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:10:01,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 04:10:01,774 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:10:01,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:01,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1162542870, now seen corresponding path program 1 times [2023-08-30 04:10:01,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:01,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868001704] [2023-08-30 04:10:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:01,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:01,847 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 04:10:01,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:10:01,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868001704] [2023-08-30 04:10:01,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868001704] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:10:01,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:10:01,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:10:01,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113419347] [2023-08-30 04:10:01,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:10:01,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:10:01,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:10:01,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:10:01,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:10:01,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 360 [2023-08-30 04:10:01,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 68 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:01,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:10:01,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 360 [2023-08-30 04:10:01,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:10:07,334 INFO L130 PetriNetUnfolder]: 62894/92815 cut-off events. [2023-08-30 04:10:07,334 INFO L131 PetriNetUnfolder]: For 21121/21121 co-relation queries the response was YES. [2023-08-30 04:10:07,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199241 conditions, 92815 events. 62894/92815 cut-off events. For 21121/21121 co-relation queries the response was YES. Maximal size of possible extension queue 2528. Compared 685574 event pairs, 33380 based on Foata normal form. 0/76250 useless extension candidates. Maximal degree in co-relation 157383. Up to 38860 conditions per place. [2023-08-30 04:10:07,811 INFO L137 encePairwiseOnDemand]: 334/360 looper letters, 103 selfloop transitions, 14 changer transitions 0/126 dead transitions. [2023-08-30 04:10:07,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 126 transitions, 544 flow [2023-08-30 04:10:07,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:10:07,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:10:07,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 699 transitions. [2023-08-30 04:10:07,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48541666666666666 [2023-08-30 04:10:07,814 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 699 transitions. [2023-08-30 04:10:07,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 699 transitions. [2023-08-30 04:10:07,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:10:07,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 699 transitions. [2023-08-30 04:10:07,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.75) internal successors, (699), 4 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:07,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 360.0) internal successors, (1800), 5 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:07,818 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 360.0) internal successors, (1800), 5 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:07,818 INFO L175 Difference]: Start difference. First operand has 80 places, 68 transitions, 182 flow. Second operand 4 states and 699 transitions. [2023-08-30 04:10:07,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 126 transitions, 544 flow [2023-08-30 04:10:12,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 126 transitions, 534 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:10:12,399 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 328 flow [2023-08-30 04:10:12,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2023-08-30 04:10:12,400 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -1 predicate places. [2023-08-30 04:10:12,400 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 328 flow [2023-08-30 04:10:12,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:12,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:12,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 04:10:12,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 04:10:12,401 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:10:12,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:12,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1767645863, now seen corresponding path program 1 times [2023-08-30 04:10:12,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:12,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500772636] [2023-08-30 04:10:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:12,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:12,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:10:12,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500772636] [2023-08-30 04:10:12,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500772636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:10:12,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696035179] [2023-08-30 04:10:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:12,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:10:12,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:10:12,448 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 04:10:12,450 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 04:10:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:12,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 04:10:12,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:10:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:12,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:10:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:12,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696035179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:10:12,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:10:12,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-30 04:10:12,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626428234] [2023-08-30 04:10:12,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:10:12,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 04:10:12,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:10:12,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 04:10:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-30 04:10:12,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 360 [2023-08-30 04:10:12,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 328 flow. Second operand has 9 states, 9 states have (on average 169.33333333333334) internal successors, (1524), 9 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:12,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:10:12,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 360 [2023-08-30 04:10:12,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:10:13,463 INFO L130 PetriNetUnfolder]: 7285/11791 cut-off events. [2023-08-30 04:10:13,463 INFO L131 PetriNetUnfolder]: For 6127/6397 co-relation queries the response was YES. [2023-08-30 04:10:13,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29144 conditions, 11791 events. 7285/11791 cut-off events. For 6127/6397 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 79758 event pairs, 224 based on Foata normal form. 1079/12705 useless extension candidates. Maximal degree in co-relation 29134. Up to 7161 conditions per place. [2023-08-30 04:10:13,544 INFO L137 encePairwiseOnDemand]: 357/360 looper letters, 82 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-08-30 04:10:13,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 96 transitions, 460 flow [2023-08-30 04:10:13,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:10:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:10:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1090 transitions. [2023-08-30 04:10:13,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2023-08-30 04:10:13,547 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1090 transitions. [2023-08-30 04:10:13,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1090 transitions. [2023-08-30 04:10:13,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:10:13,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1090 transitions. [2023-08-30 04:10:13,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.66666666666666) internal successors, (1090), 6 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:13,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:13,554 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:13,554 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 328 flow. Second operand 6 states and 1090 transitions. [2023-08-30 04:10:13,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 96 transitions, 460 flow [2023-08-30 04:10:13,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 96 transitions, 452 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 04:10:13,573 INFO L231 Difference]: Finished difference. Result has 60 places, 43 transitions, 142 flow [2023-08-30 04:10:13,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=60, PETRI_TRANSITIONS=43} [2023-08-30 04:10:13,573 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -25 predicate places. [2023-08-30 04:10:13,573 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 43 transitions, 142 flow [2023-08-30 04:10:13,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 169.33333333333334) internal successors, (1524), 9 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:13,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:13,574 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 04:10:13,578 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 04:10:13,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 04:10:13,775 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:10:13,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash 2103360945, now seen corresponding path program 1 times [2023-08-30 04:10:13,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:13,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33861746] [2023-08-30 04:10:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:13,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:10:13,809 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:10:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:10:13,832 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:10:13,832 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:10:13,833 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2023-08-30 04:10:13,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2023-08-30 04:10:13,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2023-08-30 04:10:13,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2023-08-30 04:10:13,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2023-08-30 04:10:13,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2023-08-30 04:10:13,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (32 of 39 remaining) [2023-08-30 04:10:13,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2023-08-30 04:10:13,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2023-08-30 04:10:13,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2023-08-30 04:10:13,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2023-08-30 04:10:13,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2023-08-30 04:10:13,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2023-08-30 04:10:13,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2023-08-30 04:10:13,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2023-08-30 04:10:13,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2023-08-30 04:10:13,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 39 remaining) [2023-08-30 04:10:13,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2023-08-30 04:10:13,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2023-08-30 04:10:13,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2023-08-30 04:10:13,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2023-08-30 04:10:13,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2023-08-30 04:10:13,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2023-08-30 04:10:13,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2023-08-30 04:10:13,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2023-08-30 04:10:13,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2023-08-30 04:10:13,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2023-08-30 04:10:13,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 39 remaining) [2023-08-30 04:10:13,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2023-08-30 04:10:13,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2023-08-30 04:10:13,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2023-08-30 04:10:13,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2023-08-30 04:10:13,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2023-08-30 04:10:13,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2023-08-30 04:10:13,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2023-08-30 04:10:13,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2023-08-30 04:10:13,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2023-08-30 04:10:13,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2023-08-30 04:10:13,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 39 remaining) [2023-08-30 04:10:13,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 04:10:13,837 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:10:13,838 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:10:13,838 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 04:10:13,869 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 04:10:13,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 239 transitions, 510 flow [2023-08-30 04:10:13,909 INFO L130 PetriNetUnfolder]: 44/406 cut-off events. [2023-08-30 04:10:13,910 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 04:10:13,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 406 events. 44/406 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1547 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 330. Up to 10 conditions per place. [2023-08-30 04:10:13,915 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 239 transitions, 510 flow [2023-08-30 04:10:13,918 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 239 transitions, 510 flow [2023-08-30 04:10:13,919 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:10:13,919 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 239 transitions, 510 flow [2023-08-30 04:10:13,919 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 239 transitions, 510 flow [2023-08-30 04:10:13,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 239 transitions, 510 flow [2023-08-30 04:10:13,956 INFO L130 PetriNetUnfolder]: 44/406 cut-off events. [2023-08-30 04:10:13,957 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 04:10:13,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 406 events. 44/406 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1547 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 330. Up to 10 conditions per place. [2023-08-30 04:10:13,976 INFO L119 LiptonReduction]: Number of co-enabled transitions 33760 [2023-08-30 04:10:17,429 INFO L134 LiptonReduction]: Checked pairs total: 98133 [2023-08-30 04:10:17,429 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-08-30 04:10:17,430 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:10:17,431 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;@57d5a019, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:10:17,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-08-30 04:10:17,432 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:10:17,432 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:10:17,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:17,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:10:17,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:10:17,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:17,433 INFO L85 PathProgramCache]: Analyzing trace with hash 52645, now seen corresponding path program 1 times [2023-08-30 04:10:17,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:17,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890624008] [2023-08-30 04:10:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:17,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:17,483 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 04:10:17,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:10:17,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890624008] [2023-08-30 04:10:17,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890624008] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:10:17,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:10:17,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:10:17,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330921387] [2023-08-30 04:10:17,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:10:17,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:10:17,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:10:17,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:10:17,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:10:17,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 431 [2023-08-30 04:10:17,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 124 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:17,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:10:17,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 431 [2023-08-30 04:10:17,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand