./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.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_87-lists_racefree.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 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --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 07:06:03,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 07:06:03,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 07:06:04,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 07:06:04,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 07:06:04,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 07:06:04,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 07:06:04,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 07:06:04,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 07:06:04,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 07:06:04,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 07:06:04,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 07:06:04,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 07:06:04,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 07:06:04,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 07:06:04,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 07:06:04,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 07:06:04,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 07:06:04,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 07:06:04,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 07:06:04,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 07:06:04,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 07:06:04,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 07:06:04,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 07:06:04,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 07:06:04,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 07:06:04,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 07:06:04,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 07:06:04,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 07:06:04,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 07:06:04,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 07:06:04,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 07:06:04,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 07:06:04,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 07:06:04,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 07:06:04,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 07:06:04,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 07:06:04,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 07:06:04,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 07:06:04,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 07:06:04,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 07:06:04,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 07:06:04,049 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 07:06:04,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 07:06:04,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 07:06:04,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 07:06:04,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 07:06:04,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 07:06:04,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 07:06:04,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 07:06:04,052 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 07:06:04,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 07:06:04,052 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 07:06:04,053 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 07:06:04,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 07:06:04,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 07:06:04,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 07:06:04,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 07:06:04,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 07:06:04,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 07:06:04,054 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 07:06:04,054 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 07:06:04,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 07:06:04,055 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 07:06:04,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 07:06:04,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 07:06:04,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 07:06:04,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 07:06:04,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:06:04,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 07:06:04,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 07:06:04,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 07:06:04,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 07:06:04,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 07:06:04,057 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 07:06:04,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 07:06:04,057 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 07:06:04,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 07:06:04,057 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 07:06:04,057 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 07:06:04,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 07:06:04,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 07:06:04,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 07:06:04,326 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 07:06:04,326 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 07:06:04,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2023-09-01 07:06:05,342 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 07:06:05,602 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 07:06:05,603 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2023-09-01 07:06:05,625 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7270115c/ef67b05d70464a3a85c2d402044a7718/FLAGc47ab923f [2023-09-01 07:06:05,644 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7270115c/ef67b05d70464a3a85c2d402044a7718 [2023-09-01 07:06:05,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 07:06:05,648 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 07:06:05,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 07:06:05,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 07:06:05,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 07:06:05,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:06:05" (1/1) ... [2023-09-01 07:06:05,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@305ef1e2 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 07:06:05,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:06:05" (1/1) ... [2023-09-01 07:06:05,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 07:06:05,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 07:06:05,983 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_87-lists_racefree.i[47038,47051] [2023-09-01 07:06:06,023 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:06:06,125 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 07:06:06,145 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_87-lists_racefree.i[47038,47051] [2023-09-01 07:06:06,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:06:06,191 INFO L208 MainTranslator]: Completed translation [2023-09-01 07:06:06,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:06 WrapperNode [2023-09-01 07:06:06,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 07:06:06,193 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 07:06:06,193 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 07:06:06,193 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 07:06:06,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:06" (1/1) ... [2023-09-01 07:06:06,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:06" (1/1) ... [2023-09-01 07:06:06,236 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 242 [2023-09-01 07:06:06,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 07:06:06,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 07:06:06,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 07:06:06,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 07:06:06,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:06" (1/1) ... [2023-09-01 07:06:06,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:06" (1/1) ... [2023-09-01 07:06:06,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:06" (1/1) ... [2023-09-01 07:06:06,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:06" (1/1) ... [2023-09-01 07:06:06,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:06" (1/1) ... [2023-09-01 07:06:06,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:06" (1/1) ... [2023-09-01 07:06:06,257 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:06" (1/1) ... [2023-09-01 07:06:06,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:06" (1/1) ... [2023-09-01 07:06:06,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 07:06:06,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 07:06:06,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 07:06:06,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 07:06:06,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:06" (1/1) ... [2023-09-01 07:06:06,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:06:06,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:06:06,302 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 07:06:06,303 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 07:06:06,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 07:06:06,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 07:06:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-09-01 07:06:06,324 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-09-01 07:06:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 07:06:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 07:06:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-09-01 07:06:06,324 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-09-01 07:06:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 07:06:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 07:06:06,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 07:06:06,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 07:06:06,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 07:06:06,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 07:06:06,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 07:06:06,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 07:06:06,326 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 07:06:06,464 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 07:06:06,466 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 07:06:06,828 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 07:06:06,834 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 07:06:06,835 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-09-01 07:06:06,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:06:06 BoogieIcfgContainer [2023-09-01 07:06:06,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 07:06:06,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 07:06:06,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 07:06:06,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 07:06:06,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 07:06:05" (1/3) ... [2023-09-01 07:06:06,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f73216c 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 07:06:06,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:06" (2/3) ... [2023-09-01 07:06:06,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f73216c 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 07:06:06,846 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 07:06:06,848 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2023-09-01 07:06:06,853 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 07:06:06,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 07:06:06,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-09-01 07:06:06,863 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 07:06:06,933 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 07:06:06,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 256 transitions, 534 flow [2023-09-01 07:06:07,084 INFO L130 PetriNetUnfolder]: 54/481 cut-off events. [2023-09-01 07:06:07,084 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2023-09-01 07:06:07,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 481 events. 54/481 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1986 event pairs, 0 based on Foata normal form. 0/391 useless extension candidates. Maximal degree in co-relation 242. Up to 8 conditions per place. [2023-09-01 07:06:07,092 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 256 transitions, 534 flow [2023-09-01 07:06:07,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 250 transitions, 516 flow [2023-09-01 07:06:07,100 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 07:06:07,106 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 232 places, 250 transitions, 516 flow [2023-09-01 07:06:07,108 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 232 places, 250 transitions, 516 flow [2023-09-01 07:06:07,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 250 transitions, 516 flow [2023-09-01 07:06:07,173 INFO L130 PetriNetUnfolder]: 50/457 cut-off events. [2023-09-01 07:06:07,174 INFO L131 PetriNetUnfolder]: For 4/8 co-relation queries the response was YES. [2023-09-01 07:06:07,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 457 events. 50/457 cut-off events. For 4/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1827 event pairs, 0 based on Foata normal form. 0/375 useless extension candidates. Maximal degree in co-relation 220. Up to 8 conditions per place. [2023-09-01 07:06:07,188 INFO L119 LiptonReduction]: Number of co-enabled transitions 19060 [2023-09-01 07:06:12,954 INFO L134 LiptonReduction]: Checked pairs total: 29905 [2023-09-01 07:06:12,955 INFO L136 LiptonReduction]: Total number of compositions: 212 [2023-09-01 07:06:12,967 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 07:06:12,973 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;@5dded333, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 07:06:12,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-09-01 07:06:12,978 INFO L130 PetriNetUnfolder]: 1/23 cut-off events. [2023-09-01 07:06:12,979 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:06:12,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:06:12,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 07:06:12,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:06:12,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:06:12,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1378063670, now seen corresponding path program 1 times [2023-09-01 07:06:12,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:06:12,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063030222] [2023-09-01 07:06:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:12,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:06:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:06:13,204 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 07:06:13,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:06:13,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063030222] [2023-09-01 07:06:13,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063030222] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:06:13,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:06:13,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 07:06:13,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824294309] [2023-09-01 07:06:13,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:06:13,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:06:13,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:06:13,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:06:13,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:06:13,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 468 [2023-09-01 07:06:13,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 74 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 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 07:06:13,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:06:13,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 468 [2023-09-01 07:06:13,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:06:13,911 INFO L130 PetriNetUnfolder]: 4325/7405 cut-off events. [2023-09-01 07:06:13,911 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-09-01 07:06:13,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14247 conditions, 7405 events. 4325/7405 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 45825 event pairs, 4048 based on Foata normal form. 580/6086 useless extension candidates. Maximal degree in co-relation 12610. Up to 6762 conditions per place. [2023-09-01 07:06:13,927 INFO L137 encePairwiseOnDemand]: 454/468 looper letters, 41 selfloop transitions, 2 changer transitions 13/64 dead transitions. [2023-09-01 07:06:13,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 256 flow [2023-09-01 07:06:13,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:06:13,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:06:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-09-01 07:06:13,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5356125356125356 [2023-09-01 07:06:13,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-09-01 07:06:13,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-09-01 07:06:13,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:06:13,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-09-01 07:06:13,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 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 07:06:13,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 468.0) internal successors, (1872), 4 states have internal predecessors, (1872), 0 states have call successors, (0), 0 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 07:06:13,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 468.0) internal successors, (1872), 4 states have internal predecessors, (1872), 0 states have call successors, (0), 0 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 07:06:13,960 INFO L175 Difference]: Start difference. First operand has 63 places, 74 transitions, 164 flow. Second operand 3 states and 752 transitions. [2023-09-01 07:06:13,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 256 flow [2023-09-01 07:06:13,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 256 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 07:06:13,967 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 122 flow [2023-09-01 07:06:13,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, 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 07:06:13,970 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-09-01 07:06:13,971 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 122 flow [2023-09-01 07:06:13,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 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 07:06:13,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:06:13,974 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 07:06:13,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 07:06:13,974 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:06:13,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:06:13,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1038748982, now seen corresponding path program 1 times [2023-09-01 07:06:13,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:06:13,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583188487] [2023-09-01 07:06:13,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:13,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:06:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:06:14,105 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 07:06:14,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:06:14,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583188487] [2023-09-01 07:06:14,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583188487] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:06:14,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228829523] [2023-09-01 07:06:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:14,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:06:14,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:06:14,109 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 07:06:14,111 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 07:06:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:06:14,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 07:06:14,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:06:14,271 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 07:06:14,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:06:14,293 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 07:06:14,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228829523] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:06:14,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:06:14,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 07:06:14,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387624614] [2023-09-01 07:06:14,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:06:14,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 07:06:14,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:06:14,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 07:06:14,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 07:06:14,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 468 [2023-09-01 07:06:14,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 122 flow. Second operand has 7 states, 7 states have (on average 228.57142857142858) internal successors, (1600), 7 states have internal predecessors, (1600), 0 states have call successors, (0), 0 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 07:06:14,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:06:14,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 468 [2023-09-01 07:06:14,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:06:14,682 INFO L130 PetriNetUnfolder]: 2169/3785 cut-off events. [2023-09-01 07:06:14,682 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 07:06:14,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7264 conditions, 3785 events. 2169/3785 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 21057 event pairs, 2048 based on Foata normal form. 0/2762 useless extension candidates. Maximal degree in co-relation 7251. Up to 3430 conditions per place. [2023-09-01 07:06:14,693 INFO L137 encePairwiseOnDemand]: 465/468 looper letters, 41 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-09-01 07:06:14,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 226 flow [2023-09-01 07:06:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 07:06:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 07:06:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1411 transitions. [2023-09-01 07:06:14,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024928774928775 [2023-09-01 07:06:14,697 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1411 transitions. [2023-09-01 07:06:14,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1411 transitions. [2023-09-01 07:06:14,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:06:14,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1411 transitions. [2023-09-01 07:06:14,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 235.16666666666666) internal successors, (1411), 6 states have internal predecessors, (1411), 0 states have call successors, (0), 0 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 07:06:14,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 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 07:06:14,705 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 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 07:06:14,705 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 122 flow. Second operand 6 states and 1411 transitions. [2023-09-01 07:06:14,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 226 flow [2023-09-01 07:06:14,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 54 transitions, 222 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 07:06:14,706 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 154 flow [2023-09-01 07:06:14,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, 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 07:06:14,707 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2023-09-01 07:06:14,707 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 154 flow [2023-09-01 07:06:14,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 228.57142857142858) internal successors, (1600), 7 states have internal predecessors, (1600), 0 states have call successors, (0), 0 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 07:06:14,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:06:14,708 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 07:06:14,719 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 07:06:14,923 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 07:06:14,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:06:14,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:06:14,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1275172150, now seen corresponding path program 2 times [2023-09-01 07:06:14,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:06:14,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050871940] [2023-09-01 07:06:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:14,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:06:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:06:15,072 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 07:06:15,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:06:15,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050871940] [2023-09-01 07:06:15,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050871940] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:06:15,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967933242] [2023-09-01 07:06:15,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 07:06:15,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:06:15,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:06:15,074 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 07:06:15,076 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 07:06:15,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 07:06:15,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:06:15,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 07:06:15,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:06:15,219 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 07:06:15,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:06:15,261 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 07:06:15,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967933242] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:06:15,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:06:15,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 07:06:15,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767404213] [2023-09-01 07:06:15,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:06:15,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 07:06:15,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:06:15,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 07:06:15,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 07:06:15,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 468 [2023-09-01 07:06:15,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 154 flow. Second operand has 13 states, 13 states have (on average 228.30769230769232) internal successors, (2968), 13 states have internal predecessors, (2968), 0 states have call successors, (0), 0 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 07:06:15,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:06:15,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 468 [2023-09-01 07:06:15,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:06:15,648 INFO L130 PetriNetUnfolder]: 2169/3791 cut-off events. [2023-09-01 07:06:15,648 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-09-01 07:06:15,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7301 conditions, 3791 events. 2169/3791 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 21013 event pairs, 2048 based on Foata normal form. 6/2775 useless extension candidates. Maximal degree in co-relation 7242. Up to 3430 conditions per place. [2023-09-01 07:06:15,660 INFO L137 encePairwiseOnDemand]: 465/468 looper letters, 41 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2023-09-01 07:06:15,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 60 transitions, 294 flow [2023-09-01 07:06:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 07:06:15,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 07:06:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2782 transitions. [2023-09-01 07:06:15,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2023-09-01 07:06:15,665 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2782 transitions. [2023-09-01 07:06:15,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2782 transitions. [2023-09-01 07:06:15,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:06:15,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2782 transitions. [2023-09-01 07:06:15,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 231.83333333333334) internal successors, (2782), 12 states have internal predecessors, (2782), 0 states have call successors, (0), 0 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 07:06:15,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 468.0) internal successors, (6084), 13 states have internal predecessors, (6084), 0 states have call successors, (0), 0 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 07:06:15,679 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 468.0) internal successors, (6084), 13 states have internal predecessors, (6084), 0 states have call successors, (0), 0 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 07:06:15,679 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 154 flow. Second operand 12 states and 2782 transitions. [2023-09-01 07:06:15,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 60 transitions, 294 flow [2023-09-01 07:06:15,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 60 transitions, 280 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 07:06:15,682 INFO L231 Difference]: Finished difference. Result has 78 places, 60 transitions, 224 flow [2023-09-01 07:06:15,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, 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 07:06:15,705 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 15 predicate places. [2023-09-01 07:06:15,705 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 224 flow [2023-09-01 07:06:15,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 228.30769230769232) internal successors, (2968), 13 states have internal predecessors, (2968), 0 states have call successors, (0), 0 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 07:06:15,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:06:15,706 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 07:06:15,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 07:06:15,911 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 07:06:15,914 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:06:15,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:06:15,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1622054198, now seen corresponding path program 3 times [2023-09-01 07:06:15,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:06:15,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584900279] [2023-09-01 07:06:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:15,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:06:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:06:16,250 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 07:06:16,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:06:16,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584900279] [2023-09-01 07:06:16,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584900279] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:06:16,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58322859] [2023-09-01 07:06:16,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 07:06:16,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:06:16,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:06:16,253 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 07:06:16,255 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 07:08:54,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 07:08:54,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:08:54,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 07:08:54,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:08:54,098 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 07:08:54,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:08:54,266 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 07:08:54,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58322859] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:08:54,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:08:54,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-09-01 07:08:54,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23688453] [2023-09-01 07:08:54,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:08:54,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 07:08:54,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:08:54,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 07:08:54,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-09-01 07:08:54,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 468 [2023-09-01 07:08:54,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 224 flow. Second operand has 25 states, 25 states have (on average 228.16) internal successors, (5704), 25 states have internal predecessors, (5704), 0 states have call successors, (0), 0 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 07:08:54,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:08:54,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 468 [2023-09-01 07:08:54,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:08:54,766 INFO L130 PetriNetUnfolder]: 2169/3803 cut-off events. [2023-09-01 07:08:54,766 INFO L131 PetriNetUnfolder]: For 470/470 co-relation queries the response was YES. [2023-09-01 07:08:54,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7385 conditions, 3803 events. 2169/3803 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 21056 event pairs, 2048 based on Foata normal form. 12/2793 useless extension candidates. Maximal degree in co-relation 7248. Up to 3430 conditions per place. [2023-09-01 07:08:54,777 INFO L137 encePairwiseOnDemand]: 465/468 looper letters, 41 selfloop transitions, 23 changer transitions 0/72 dead transitions. [2023-09-01 07:08:54,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 72 transitions, 448 flow [2023-09-01 07:08:54,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 07:08:54,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 07:08:54,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5524 transitions. [2023-09-01 07:08:54,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4918091168091168 [2023-09-01 07:08:54,787 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5524 transitions. [2023-09-01 07:08:54,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5524 transitions. [2023-09-01 07:08:54,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:08:54,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5524 transitions. [2023-09-01 07:08:54,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 230.16666666666666) internal successors, (5524), 24 states have internal predecessors, (5524), 0 states have call successors, (0), 0 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 07:08:54,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 468.0) internal successors, (11700), 25 states have internal predecessors, (11700), 0 states have call successors, (0), 0 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 07:08:54,809 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 468.0) internal successors, (11700), 25 states have internal predecessors, (11700), 0 states have call successors, (0), 0 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 07:08:54,810 INFO L175 Difference]: Start difference. First operand has 78 places, 60 transitions, 224 flow. Second operand 24 states and 5524 transitions. [2023-09-01 07:08:54,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 72 transitions, 448 flow [2023-09-01 07:08:54,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 72 transitions, 376 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-09-01 07:08:54,813 INFO L231 Difference]: Finished difference. Result has 108 places, 72 transitions, 344 flow [2023-09-01 07:08:54,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, 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 07:08:54,814 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 45 predicate places. [2023-09-01 07:08:54,814 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 72 transitions, 344 flow [2023-09-01 07:08:54,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 228.16) internal successors, (5704), 25 states have internal predecessors, (5704), 0 states have call successors, (0), 0 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 07:08:54,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:08:54,816 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1] [2023-09-01 07:08:54,844 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 07:08:55,033 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 07:08:55,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:08:55,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:08:55,033 INFO L85 PathProgramCache]: Analyzing trace with hash -121072330, now seen corresponding path program 4 times [2023-09-01 07:08:55,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:08:55,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657780291] [2023-09-01 07:08:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:08:55,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:08:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:08:55,858 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 07:08:55,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:08:55,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657780291] [2023-09-01 07:08:55,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657780291] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:08:55,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870540126] [2023-09-01 07:08:55,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 07:08:55,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:08:55,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:08:55,861 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 07:08:55,863 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 07:08:56,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 07:08:56,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:08:56,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 07:08:56,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:08:56,265 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 07:08:56,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:08:56,819 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 07:08:56,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870540126] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:08:56,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:08:56,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-09-01 07:08:56,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350096426] [2023-09-01 07:08:56,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:08:56,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-09-01 07:08:56,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:08:56,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-09-01 07:08:56,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-09-01 07:08:56,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 468 [2023-09-01 07:08:56,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 72 transitions, 344 flow. Second operand has 49 states, 49 states have (on average 228.08163265306123) internal successors, (11176), 49 states have internal predecessors, (11176), 0 states have call successors, (0), 0 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 07:08:56,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:08:56,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 468 [2023-09-01 07:08:56,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:08:57,537 INFO L130 PetriNetUnfolder]: 2169/3827 cut-off events. [2023-09-01 07:08:57,538 INFO L131 PetriNetUnfolder]: For 5240/5240 co-relation queries the response was YES. [2023-09-01 07:08:57,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7529 conditions, 3827 events. 2169/3827 cut-off events. For 5240/5240 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 21056 event pairs, 2048 based on Foata normal form. 24/2829 useless extension candidates. Maximal degree in co-relation 7260. Up to 3430 conditions per place. [2023-09-01 07:08:57,556 INFO L137 encePairwiseOnDemand]: 465/468 looper letters, 41 selfloop transitions, 47 changer transitions 0/96 dead transitions. [2023-09-01 07:08:57,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 96 transitions, 712 flow [2023-09-01 07:08:57,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 07:08:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 07:08:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 11008 transitions. [2023-09-01 07:08:57,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002849002849 [2023-09-01 07:08:57,573 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 11008 transitions. [2023-09-01 07:08:57,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 11008 transitions. [2023-09-01 07:08:57,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:08:57,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 11008 transitions. [2023-09-01 07:08:57,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 229.33333333333334) internal successors, (11008), 48 states have internal predecessors, (11008), 0 states have call successors, (0), 0 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 07:08:57,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 468.0) internal successors, (22932), 49 states have internal predecessors, (22932), 0 states have call successors, (0), 0 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 07:08:57,658 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 468.0) internal successors, (22932), 49 states have internal predecessors, (22932), 0 states have call successors, (0), 0 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 07:08:57,658 INFO L175 Difference]: Start difference. First operand has 108 places, 72 transitions, 344 flow. Second operand 48 states and 11008 transitions. [2023-09-01 07:08:57,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 96 transitions, 712 flow [2023-09-01 07:08:57,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 96 transitions, 568 flow, removed 61 selfloop flow, removed 11 redundant places. [2023-09-01 07:08:57,666 INFO L231 Difference]: Finished difference. Result has 168 places, 96 transitions, 584 flow [2023-09-01 07:08:57,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, 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 07:08:57,668 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 105 predicate places. [2023-09-01 07:08:57,668 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 96 transitions, 584 flow [2023-09-01 07:08:57,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 228.08163265306123) internal successors, (11176), 49 states have internal predecessors, (11176), 0 states have call successors, (0), 0 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 07:08:57,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:08:57,670 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 2, 1, 1, 1, 1, 1] [2023-09-01 07:08:57,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 07:08:57,880 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 07:08:57,881 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:08:57,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:08:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1543727818, now seen corresponding path program 5 times [2023-09-01 07:08:57,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:08:57,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587881389] [2023-09-01 07:08:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:08:57,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:08:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:09:00,641 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 07:09:00,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:09:00,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587881389] [2023-09-01 07:09:00,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587881389] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:09:00,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542999803] [2023-09-01 07:09:00,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 07:09:00,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:09:00,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:09:00,642 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 07:09:00,643 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