./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows 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/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 07:06:02,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 07:06:02,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 07:06:02,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 07:06:02,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 07:06:02,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 07:06:02,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 07:06:02,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 07:06:02,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 07:06:02,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 07:06:02,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 07:06:02,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 07:06:02,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 07:06:02,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 07:06:02,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 07:06:02,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 07:06:02,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 07:06:02,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 07:06:02,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 07:06:02,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 07:06:02,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 07:06:02,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 07:06:02,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 07:06:02,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 07:06:03,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 07:06:03,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 07:06:03,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 07:06:03,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 07:06:03,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 07:06:03,004 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 07:06:03,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 07:06:03,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 07:06:03,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 07:06:03,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 07:06:03,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 07:06:03,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 07:06:03,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 07:06:03,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 07:06:03,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 07:06:03,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 07:06:03,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 07:06:03,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 07:06:03,061 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 07:06:03,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 07:06:03,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 07:06:03,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 07:06:03,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 07:06:03,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 07:06:03,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 07:06:03,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 07:06:03,063 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 07:06:03,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 07:06:03,063 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 07:06:03,063 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 07:06:03,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 07:06:03,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 07:06:03,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 07:06:03,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 07:06:03,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 07:06:03,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 07:06:03,064 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 07:06:03,064 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 07:06:03,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 07:06:03,064 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 07:06:03,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 07:06:03,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 07:06:03,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 07:06:03,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 07:06:03,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:06:03,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 07:06:03,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 07:06:03,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 07:06:03,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 07:06:03,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 07:06:03,066 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 07:06:03,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 07:06:03,066 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 07:06:03,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 07:06:03,067 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 07:06:03,067 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 07:06:03,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 07:06:03,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 07:06:03,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 07:06:03,383 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 07:06:03,383 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 07:06:03,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i [2023-09-01 07:06:04,614 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 07:06:04,958 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 07:06:04,959 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i [2023-09-01 07:06:04,982 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39eeaee52/dbb0a18f33d14f059d2c3de4f2c70592/FLAG2d7ddc0e2 [2023-09-01 07:06:04,999 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39eeaee52/dbb0a18f33d14f059d2c3de4f2c70592 [2023-09-01 07:06:05,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 07:06:05,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 07:06:05,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 07:06:05,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 07:06:05,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 07:06:05,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:06:05" (1/1) ... [2023-09-01 07:06:05,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ffdd8fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:05, skipping insertion in model container [2023-09-01 07:06:05,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:06:05" (1/1) ... [2023-09-01 07:06:05,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 07:06:05,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 07:06:05,442 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_86-lists_racing.i[47038,47051] [2023-09-01 07:06:05,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:06:05,584 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 07:06:05,631 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_86-lists_racing.i[47038,47051] [2023-09-01 07:06:05,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:06:05,730 INFO L208 MainTranslator]: Completed translation [2023-09-01 07:06:05,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:05 WrapperNode [2023-09-01 07:06:05,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 07:06:05,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 07:06:05,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 07:06:05,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 07:06:05,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:05" (1/1) ... [2023-09-01 07:06:05,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:05" (1/1) ... [2023-09-01 07:06:05,814 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 246 [2023-09-01 07:06:05,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 07:06:05,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 07:06:05,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 07:06:05,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 07:06:05,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:05" (1/1) ... [2023-09-01 07:06:05,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:05" (1/1) ... [2023-09-01 07:06:05,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:05" (1/1) ... [2023-09-01 07:06:05,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:05" (1/1) ... [2023-09-01 07:06:05,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:05" (1/1) ... [2023-09-01 07:06:05,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:05" (1/1) ... [2023-09-01 07:06:05,884 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:05" (1/1) ... [2023-09-01 07:06:05,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:05" (1/1) ... [2023-09-01 07:06:05,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 07:06:05,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 07:06:05,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 07:06:05,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 07:06:05,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:05" (1/1) ... [2023-09-01 07:06:05,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:06:05,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:06:05,921 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 07:06:05,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 07:06:05,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 07:06:05,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 07:06:05,961 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-09-01 07:06:05,961 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-09-01 07:06:05,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 07:06:05,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 07:06:05,961 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-09-01 07:06:05,962 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-09-01 07:06:05,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 07:06:05,962 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 07:06:05,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 07:06:05,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 07:06:05,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 07:06:05,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 07:06:05,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 07:06:05,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 07:06:05,964 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 07:06:06,163 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 07:06:06,164 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 07:06:06,474 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 07:06:06,483 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 07:06:06,483 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-09-01 07:06:06,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:06:06 BoogieIcfgContainer [2023-09-01 07:06:06,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 07:06:06,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 07:06:06,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 07:06:06,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 07:06:06,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 07:06:05" (1/3) ... [2023-09-01 07:06:06,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11018334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:06:06, skipping insertion in model container [2023-09-01 07:06:06,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:05" (2/3) ... [2023-09-01 07:06:06,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11018334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:06:06, skipping insertion in model container [2023-09-01 07:06:06,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:06:06" (3/3) ... [2023-09-01 07:06:06,493 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2023-09-01 07:06:06,499 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 07:06:06,517 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 07:06:06,517 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-09-01 07:06:06,518 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 07:06:06,678 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 07:06:06,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 240 places, 260 transitions, 542 flow [2023-09-01 07:06:06,917 INFO L130 PetriNetUnfolder]: 54/489 cut-off events. [2023-09-01 07:06:06,917 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2023-09-01 07:06:06,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 489 events. 54/489 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2024 event pairs, 0 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 231. Up to 8 conditions per place. [2023-09-01 07:06:06,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 240 places, 260 transitions, 542 flow [2023-09-01 07:06:06,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 236 places, 254 transitions, 524 flow [2023-09-01 07:06:06,943 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 07:06:06,957 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 236 places, 254 transitions, 524 flow [2023-09-01 07:06:06,960 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 236 places, 254 transitions, 524 flow [2023-09-01 07:06:06,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 254 transitions, 524 flow [2023-09-01 07:06:07,035 INFO L130 PetriNetUnfolder]: 50/465 cut-off events. [2023-09-01 07:06:07,036 INFO L131 PetriNetUnfolder]: For 4/8 co-relation queries the response was YES. [2023-09-01 07:06:07,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 465 events. 50/465 cut-off events. For 4/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1871 event pairs, 0 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 224. Up to 8 conditions per place. [2023-09-01 07:06:07,056 INFO L119 LiptonReduction]: Number of co-enabled transitions 19700 [2023-09-01 07:06:13,260 INFO L134 LiptonReduction]: Checked pairs total: 30833 [2023-09-01 07:06:13,261 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-09-01 07:06:13,273 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 07:06:13,279 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@808073a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 07:06:13,280 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-09-01 07:06:13,286 INFO L130 PetriNetUnfolder]: 1/29 cut-off events. [2023-09-01 07:06:13,286 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:06:13,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:06:13,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 07:06:13,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:06:13,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:06:13,292 INFO L85 PathProgramCache]: Analyzing trace with hash 579072952, now seen corresponding path program 1 times [2023-09-01 07:06:13,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:06:13,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221311395] [2023-09-01 07:06:13,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:13,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:06:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:06:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:06:13,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:06:13,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221311395] [2023-09-01 07:06:13,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221311395] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:06:13,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:06:13,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 07:06:13,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045519678] [2023-09-01 07:06:13,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:06:13,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:06:13,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:06:13,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:06:13,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:06:13,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 478 [2023-09-01 07:06:13,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 74 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:13,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:06:13,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 478 [2023-09-01 07:06:13,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:06:14,570 INFO L130 PetriNetUnfolder]: 4913/8017 cut-off events. [2023-09-01 07:06:14,571 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-09-01 07:06:14,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15796 conditions, 8017 events. 4913/8017 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 46590 event pairs, 4630 based on Foata normal form. 232/6190 useless extension candidates. Maximal degree in co-relation 13978. Up to 7698 conditions per place. [2023-09-01 07:06:14,597 INFO L137 encePairwiseOnDemand]: 464/478 looper letters, 44 selfloop transitions, 2 changer transitions 13/64 dead transitions. [2023-09-01 07:06:14,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 262 flow [2023-09-01 07:06:14,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:06:14,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:06:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 767 transitions. [2023-09-01 07:06:14,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348675034867504 [2023-09-01 07:06:14,620 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 767 transitions. [2023-09-01 07:06:14,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 767 transitions. [2023-09-01 07:06:14,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:06:14,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 767 transitions. [2023-09-01 07:06:14,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:14,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:14,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:14,641 INFO L175 Difference]: Start difference. First operand has 63 places, 74 transitions, 164 flow. Second operand 3 states and 767 transitions. [2023-09-01 07:06:14,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 262 flow [2023-09-01 07:06:14,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 262 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 07:06:14,664 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 122 flow [2023-09-01 07:06:14,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2023-09-01 07:06:14,669 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-09-01 07:06:14,670 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 122 flow [2023-09-01 07:06:14,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:14,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:06:14,674 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 07:06:14,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 07:06:14,675 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:06:14,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:06:14,684 INFO L85 PathProgramCache]: Analyzing trace with hash 658069541, now seen corresponding path program 1 times [2023-09-01 07:06:14,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:06:14,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763033695] [2023-09-01 07:06:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:14,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:06:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:06:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:06:14,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:06:14,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763033695] [2023-09-01 07:06:14,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763033695] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:06:14,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974804785] [2023-09-01 07:06:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:14,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:06:14,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:06:14,865 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:06:14,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 07:06:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:06:14,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 07:06:14,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:06:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:06:15,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:06:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:06:15,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974804785] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:06:15,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:06:15,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 07:06:15,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123229459] [2023-09-01 07:06:15,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:06:15,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 07:06:15,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:06:15,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 07:06:15,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 07:06:15,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 478 [2023-09-01 07:06:15,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 122 flow. Second operand has 7 states, 7 states have (on average 232.57142857142858) internal successors, (1628), 7 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:15,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:06:15,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 478 [2023-09-01 07:06:15,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:06:15,633 INFO L130 PetriNetUnfolder]: 2463/4080 cut-off events. [2023-09-01 07:06:15,634 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 07:06:15,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8028 conditions, 4080 events. 2463/4080 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 21412 event pairs, 2342 based on Foata normal form. 0/2967 useless extension candidates. Maximal degree in co-relation 8015. Up to 3904 conditions per place. [2023-09-01 07:06:15,649 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 44 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-09-01 07:06:15,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 232 flow [2023-09-01 07:06:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 07:06:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 07:06:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1438 transitions. [2023-09-01 07:06:15,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50139470013947 [2023-09-01 07:06:15,654 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1438 transitions. [2023-09-01 07:06:15,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1438 transitions. [2023-09-01 07:06:15,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:06:15,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1438 transitions. [2023-09-01 07:06:15,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 239.66666666666666) internal successors, (1438), 6 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:15,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:15,665 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:15,665 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 122 flow. Second operand 6 states and 1438 transitions. [2023-09-01 07:06:15,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 232 flow [2023-09-01 07:06:15,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 54 transitions, 228 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 07:06:15,667 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 154 flow [2023-09-01 07:06:15,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2023-09-01 07:06:15,669 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2023-09-01 07:06:15,669 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 154 flow [2023-09-01 07:06:15,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 232.57142857142858) internal successors, (1628), 7 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:15,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:06:15,670 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 07:06:15,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 07:06:15,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:06:15,878 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:06:15,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:06:15,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1458579192, now seen corresponding path program 2 times [2023-09-01 07:06:15,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:06:15,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963776727] [2023-09-01 07:06:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:15,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:06:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:06:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:06:16,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:06:16,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963776727] [2023-09-01 07:06:16,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963776727] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:06:16,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948013219] [2023-09-01 07:06:16,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 07:06:16,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:06:16,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:06:16,121 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:06:16,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 07:06:16,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 07:06:16,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:06:16,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 07:06:16,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:06:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:06:16,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:06:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:06:16,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948013219] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:06:16,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:06:16,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 07:06:16,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013222249] [2023-09-01 07:06:16,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:06:16,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 07:06:16,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:06:16,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 07:06:16,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 07:06:16,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 478 [2023-09-01 07:06:16,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 154 flow. Second operand has 13 states, 13 states have (on average 232.30769230769232) internal successors, (3020), 13 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:16,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:06:16,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 478 [2023-09-01 07:06:16,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:06:16,967 INFO L130 PetriNetUnfolder]: 2463/4086 cut-off events. [2023-09-01 07:06:16,967 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-09-01 07:06:16,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8065 conditions, 4086 events. 2463/4086 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 21404 event pairs, 2342 based on Foata normal form. 6/2980 useless extension candidates. Maximal degree in co-relation 8006. Up to 3904 conditions per place. [2023-09-01 07:06:16,982 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 44 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2023-09-01 07:06:16,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 60 transitions, 300 flow [2023-09-01 07:06:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 07:06:16,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 07:06:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2833 transitions. [2023-09-01 07:06:16,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4938981868898187 [2023-09-01 07:06:16,990 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2833 transitions. [2023-09-01 07:06:16,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2833 transitions. [2023-09-01 07:06:16,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:06:16,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2833 transitions. [2023-09-01 07:06:16,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 236.08333333333334) internal successors, (2833), 12 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:17,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:17,009 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:17,009 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 154 flow. Second operand 12 states and 2833 transitions. [2023-09-01 07:06:17,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 60 transitions, 300 flow [2023-09-01 07:06:17,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 60 transitions, 286 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 07:06:17,012 INFO L231 Difference]: Finished difference. Result has 78 places, 60 transitions, 224 flow [2023-09-01 07:06:17,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=224, PETRI_PLACES=78, PETRI_TRANSITIONS=60} [2023-09-01 07:06:17,013 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 15 predicate places. [2023-09-01 07:06:17,013 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 224 flow [2023-09-01 07:06:17,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 232.30769230769232) internal successors, (3020), 13 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:17,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:06:17,015 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 07:06:17,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 07:06:17,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 07:06:17,222 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:06:17,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:06:17,222 INFO L85 PathProgramCache]: Analyzing trace with hash -836393000, now seen corresponding path program 3 times [2023-09-01 07:06:17,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:06:17,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891551296] [2023-09-01 07:06:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:17,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:06:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:06:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:06:17,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:06:17,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891551296] [2023-09-01 07:06:17,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891551296] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:06:17,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576293748] [2023-09-01 07:06:17,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 07:06:17,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:06:17,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:06:17,666 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:06:17,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 07:10:26,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 07:10:26,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:10:26,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 07:10:26,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:10:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:10:26,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:10:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:10:27,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576293748] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:10:27,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:10:27,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-09-01 07:10:27,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505885127] [2023-09-01 07:10:27,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:10:27,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 07:10:27,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:10:27,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 07:10:27,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-09-01 07:10:27,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 478 [2023-09-01 07:10:27,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 224 flow. Second operand has 25 states, 25 states have (on average 232.16) internal successors, (5804), 25 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:10:27,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:10:27,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 478 [2023-09-01 07:10:27,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:10:27,837 INFO L130 PetriNetUnfolder]: 2463/4098 cut-off events. [2023-09-01 07:10:27,838 INFO L131 PetriNetUnfolder]: For 470/470 co-relation queries the response was YES. [2023-09-01 07:10:27,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8149 conditions, 4098 events. 2463/4098 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 21403 event pairs, 2342 based on Foata normal form. 12/2998 useless extension candidates. Maximal degree in co-relation 8012. Up to 3904 conditions per place. [2023-09-01 07:10:27,863 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 44 selfloop transitions, 23 changer transitions 0/72 dead transitions. [2023-09-01 07:10:27,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 72 transitions, 454 flow [2023-09-01 07:10:27,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 07:10:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 07:10:27,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5623 transitions. [2023-09-01 07:10:27,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49014993026499304 [2023-09-01 07:10:27,875 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5623 transitions. [2023-09-01 07:10:27,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5623 transitions. [2023-09-01 07:10:27,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:10:27,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5623 transitions. [2023-09-01 07:10:27,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 234.29166666666666) internal successors, (5623), 24 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:10:27,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 478.0) internal successors, (11950), 25 states have internal predecessors, (11950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:10:27,906 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 478.0) internal successors, (11950), 25 states have internal predecessors, (11950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:10:27,907 INFO L175 Difference]: Start difference. First operand has 78 places, 60 transitions, 224 flow. Second operand 24 states and 5623 transitions. [2023-09-01 07:10:27,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 72 transitions, 454 flow [2023-09-01 07:10:27,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 72 transitions, 382 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-09-01 07:10:27,911 INFO L231 Difference]: Finished difference. Result has 108 places, 72 transitions, 344 flow [2023-09-01 07:10:27,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=344, PETRI_PLACES=108, PETRI_TRANSITIONS=72} [2023-09-01 07:10:27,912 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 45 predicate places. [2023-09-01 07:10:27,912 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 72 transitions, 344 flow [2023-09-01 07:10:27,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 232.16) internal successors, (5804), 25 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:10:27,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:10:27,915 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1] [2023-09-01 07:10:27,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 07:10:28,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:10:28,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:10:28,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:10:28,134 INFO L85 PathProgramCache]: Analyzing trace with hash 910832024, now seen corresponding path program 4 times [2023-09-01 07:10:28,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:10:28,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940610320] [2023-09-01 07:10:28,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:10:28,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:10:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:10:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:10:29,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:10:29,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940610320] [2023-09-01 07:10:29,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940610320] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:10:29,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639130057] [2023-09-01 07:10:29,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 07:10:29,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:10:29,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:10:29,261 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:10:29,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 07:10:29,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 07:10:29,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:10:29,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 07:10:29,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:10:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:10:29,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:10:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:10:30,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639130057] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:10:30,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:10:30,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-09-01 07:10:30,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780408544] [2023-09-01 07:10:30,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:10:30,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-09-01 07:10:30,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:10:30,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-09-01 07:10:30,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-09-01 07:10:30,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 478 [2023-09-01 07:10:30,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 72 transitions, 344 flow. Second operand has 49 states, 49 states have (on average 232.08163265306123) internal successors, (11372), 49 states have internal predecessors, (11372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:10:30,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:10:30,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 478 [2023-09-01 07:10:30,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:10:31,452 INFO L130 PetriNetUnfolder]: 2463/4122 cut-off events. [2023-09-01 07:10:31,461 INFO L131 PetriNetUnfolder]: For 5240/5240 co-relation queries the response was YES. [2023-09-01 07:10:31,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8293 conditions, 4122 events. 2463/4122 cut-off events. For 5240/5240 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 21403 event pairs, 2342 based on Foata normal form. 24/3034 useless extension candidates. Maximal degree in co-relation 8024. Up to 3904 conditions per place. [2023-09-01 07:10:31,480 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 44 selfloop transitions, 47 changer transitions 0/96 dead transitions. [2023-09-01 07:10:31,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 96 transitions, 718 flow [2023-09-01 07:10:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 07:10:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 07:10:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 11203 transitions. [2023-09-01 07:10:31,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882758019525802 [2023-09-01 07:10:31,507 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 11203 transitions. [2023-09-01 07:10:31,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 11203 transitions. [2023-09-01 07:10:31,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:10:31,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 11203 transitions. [2023-09-01 07:10:31,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 233.39583333333334) internal successors, (11203), 48 states have internal predecessors, (11203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:10:31,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 478.0) internal successors, (23422), 49 states have internal predecessors, (23422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:10:31,580 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 478.0) internal successors, (23422), 49 states have internal predecessors, (23422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:10:31,580 INFO L175 Difference]: Start difference. First operand has 108 places, 72 transitions, 344 flow. Second operand 48 states and 11203 transitions. [2023-09-01 07:10:31,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 96 transitions, 718 flow [2023-09-01 07:10:31,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 96 transitions, 574 flow, removed 61 selfloop flow, removed 11 redundant places. [2023-09-01 07:10:31,590 INFO L231 Difference]: Finished difference. Result has 168 places, 96 transitions, 584 flow [2023-09-01 07:10:31,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=584, PETRI_PLACES=168, PETRI_TRANSITIONS=96} [2023-09-01 07:10:31,593 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 105 predicate places. [2023-09-01 07:10:31,593 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 96 transitions, 584 flow [2023-09-01 07:10:31,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 232.08163265306123) internal successors, (11372), 49 states have internal predecessors, (11372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:10:31,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:10:31,597 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 2, 1, 1, 1, 1, 1] [2023-09-01 07:10:31,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 07:10:31,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:10:31,807 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:10:31,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:10:31,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1027513064, now seen corresponding path program 5 times [2023-09-01 07:10:31,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:10:31,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238946617] [2023-09-01 07:10:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:10:31,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:10:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:10:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:10:35,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:10:35,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238946617] [2023-09-01 07:10:35,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238946617] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:10:35,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068175595] [2023-09-01 07:10:35,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 07:10:35,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:10:35,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:10:35,477 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:10:35,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15