./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_19-callback_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 00:14:01,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:14:01,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:14:01,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:14:01,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:14:01,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:14:01,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:14:01,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:14:01,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:14:01,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:14:01,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:14:01,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:14:01,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:14:01,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:14:01,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:14:01,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:14:01,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:14:01,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:14:01,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:14:01,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:14:01,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:14:01,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:14:01,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:14:01,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:14:01,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:14:01,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:14:01,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:14:01,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:14:01,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:14:01,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:14:01,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:14:01,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:14:01,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:14:01,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:14:01,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:14:01,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:14:01,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:14:01,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:14:01,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:14:01,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:14:01,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:14:01,241 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:14:01,280 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:14:01,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:14:01,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:14:01,282 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:14:01,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:14:01,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:14:01,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:14:01,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:14:01,284 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:14:01,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:14:01,285 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:14:01,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:14:01,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:14:01,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:14:01,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:14:01,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:14:01,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:14:01,286 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:14:01,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:14:01,287 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:14:01,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:14:01,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:14:01,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:14:01,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:14:01,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:14:01,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:14:01,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:14:01,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:14:01,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:14:01,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:14:01,289 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:14:01,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:14:01,289 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:14:01,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:14:01,290 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:14:01,290 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:14:01,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:14:01,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:14:01,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:14:01,641 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:14:01,641 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:14:01,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-08-31 00:14:02,689 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:14:02,958 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:14:02,959 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-08-31 00:14:02,976 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8682d7e37/61e416ae7be84db6a9ebea09aeca1317/FLAG7152b5801 [2023-08-31 00:14:02,987 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8682d7e37/61e416ae7be84db6a9ebea09aeca1317 [2023-08-31 00:14:02,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:14:02,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:14:02,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:14:02,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:14:02,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:14:02,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:14:02" (1/1) ... [2023-08-31 00:14:02,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64707227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:02, skipping insertion in model container [2023-08-31 00:14:02,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:14:02" (1/1) ... [2023-08-31 00:14:03,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:14:03,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:14:03,305 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_19-callback_racing.i[30212,30225] [2023-08-31 00:14:03,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:14:03,349 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:14:03,400 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_19-callback_racing.i[30212,30225] [2023-08-31 00:14:03,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:14:03,458 WARN L667 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 00:14:03,464 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:14:03,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:03 WrapperNode [2023-08-31 00:14:03,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:14:03,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:14:03,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:14:03,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:14:03,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:03" (1/1) ... [2023-08-31 00:14:03,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:03" (1/1) ... [2023-08-31 00:14:03,538 INFO L138 Inliner]: procedures = 173, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2023-08-31 00:14:03,539 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:14:03,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:14:03,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:14:03,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:14:03,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:03" (1/1) ... [2023-08-31 00:14:03,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:03" (1/1) ... [2023-08-31 00:14:03,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:03" (1/1) ... [2023-08-31 00:14:03,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:03" (1/1) ... [2023-08-31 00:14:03,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:03" (1/1) ... [2023-08-31 00:14:03,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:03" (1/1) ... [2023-08-31 00:14:03,573 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:03" (1/1) ... [2023-08-31 00:14:03,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:03" (1/1) ... [2023-08-31 00:14:03,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:14:03,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:14:03,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:14:03,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:14:03,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:03" (1/1) ... [2023-08-31 00:14:03,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:14:03,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:14:03,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 00:14:03,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 00:14:03,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:14:03,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:14:03,651 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:14:03,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:14:03,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:14:03,651 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 00:14:03,651 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 00:14:03,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:14:03,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:14:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:14:03,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:14:03,653 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 00:14:03,753 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:14:03,755 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:14:03,991 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:14:03,997 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:14:03,997 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-31 00:14:03,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:14:03 BoogieIcfgContainer [2023-08-31 00:14:03,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:14:04,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:14:04,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:14:04,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:14:04,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:14:02" (1/3) ... [2023-08-31 00:14:04,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b7020b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:14:04, skipping insertion in model container [2023-08-31 00:14:04,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:14:03" (2/3) ... [2023-08-31 00:14:04,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b7020b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:14:04, skipping insertion in model container [2023-08-31 00:14:04,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:14:03" (3/3) ... [2023-08-31 00:14:04,006 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2023-08-31 00:14:04,013 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:14:04,022 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:14:04,022 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 00:14:04,022 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:14:04,109 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 00:14:04,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 135 transitions, 278 flow [2023-08-31 00:14:04,259 INFO L130 PetriNetUnfolder]: 26/205 cut-off events. [2023-08-31 00:14:04,260 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:14:04,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 205 events. 26/205 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 529 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-08-31 00:14:04,266 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 135 transitions, 278 flow [2023-08-31 00:14:04,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 130 transitions, 265 flow [2023-08-31 00:14:04,276 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:14:04,296 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 130 transitions, 265 flow [2023-08-31 00:14:04,304 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 130 transitions, 265 flow [2023-08-31 00:14:04,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 130 transitions, 265 flow [2023-08-31 00:14:04,345 INFO L130 PetriNetUnfolder]: 25/200 cut-off events. [2023-08-31 00:14:04,346 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:14:04,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 200 events. 25/200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 492 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-08-31 00:14:04,350 INFO L119 LiptonReduction]: Number of co-enabled transitions 3040 [2023-08-31 00:14:07,508 INFO L134 LiptonReduction]: Checked pairs total: 4311 [2023-08-31 00:14:07,509 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-31 00:14:07,520 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:14:07,526 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;@2061c7a2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:14:07,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 00:14:07,530 INFO L130 PetriNetUnfolder]: 8/29 cut-off events. [2023-08-31 00:14:07,531 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:14:07,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:07,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 00:14:07,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-31 00:14:07,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:07,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2099220035, now seen corresponding path program 1 times [2023-08-31 00:14:07,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:07,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130833668] [2023-08-31 00:14:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:07,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:14:07,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:14:07,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130833668] [2023-08-31 00:14:07,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130833668] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:14:07,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:14:07,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 00:14:07,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132298997] [2023-08-31 00:14:07,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:14:07,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:14:07,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:14:07,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:14:07,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:14:07,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 254 [2023-08-31 00:14:07,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 34 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:07,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:14:07,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 254 [2023-08-31 00:14:07,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:14:07,951 INFO L130 PetriNetUnfolder]: 88/207 cut-off events. [2023-08-31 00:14:07,951 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:14:07,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 207 events. 88/207 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 731 event pairs, 32 based on Foata normal form. 29/194 useless extension candidates. Maximal degree in co-relation 356. Up to 122 conditions per place. [2023-08-31 00:14:07,954 INFO L137 encePairwiseOnDemand]: 241/254 looper letters, 23 selfloop transitions, 2 changer transitions 4/32 dead transitions. [2023-08-31 00:14:07,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 32 transitions, 127 flow [2023-08-31 00:14:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:14:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:14:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-08-31 00:14:07,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.520997375328084 [2023-08-31 00:14:07,968 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-08-31 00:14:07,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-08-31 00:14:07,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:14:07,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-08-31 00:14:07,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:07,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:07,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:07,983 INFO L175 Difference]: Start difference. First operand has 26 places, 34 transitions, 73 flow. Second operand 3 states and 397 transitions. [2023-08-31 00:14:07,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 32 transitions, 127 flow [2023-08-31 00:14:07,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 32 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:14:07,987 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 63 flow [2023-08-31 00:14:07,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-08-31 00:14:07,992 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-08-31 00:14:07,992 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 63 flow [2023-08-31 00:14:07,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:07,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:07,993 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 00:14:07,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:14:07,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-31 00:14:07,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:07,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2099235342, now seen corresponding path program 1 times [2023-08-31 00:14:07,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:07,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178261576] [2023-08-31 00:14:07,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:07,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:08,012 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:14:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:08,039 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:14:08,040 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:14:08,041 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-31 00:14:08,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-31 00:14:08,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-31 00:14:08,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 00:14:08,044 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-31 00:14:08,046 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:14:08,046 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 00:14:08,062 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 00:14:08,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-08-31 00:14:08,102 INFO L130 PetriNetUnfolder]: 43/321 cut-off events. [2023-08-31 00:14:08,103 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:14:08,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 321 events. 43/321 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1104 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 207. Up to 9 conditions per place. [2023-08-31 00:14:08,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 157 transitions, 332 flow [2023-08-31 00:14:08,110 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 157 transitions, 332 flow [2023-08-31 00:14:08,110 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:14:08,110 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 157 transitions, 332 flow [2023-08-31 00:14:08,111 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 157 transitions, 332 flow [2023-08-31 00:14:08,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-08-31 00:14:08,148 INFO L130 PetriNetUnfolder]: 43/321 cut-off events. [2023-08-31 00:14:08,148 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:14:08,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 321 events. 43/321 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1104 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 207. Up to 9 conditions per place. [2023-08-31 00:14:08,154 INFO L119 LiptonReduction]: Number of co-enabled transitions 7320 [2023-08-31 00:14:11,293 INFO L134 LiptonReduction]: Checked pairs total: 12194 [2023-08-31 00:14:11,294 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-31 00:14:11,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:14:11,298 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;@2061c7a2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:14:11,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 00:14:11,301 INFO L130 PetriNetUnfolder]: 8/31 cut-off events. [2023-08-31 00:14:11,302 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:14:11,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:11,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 00:14:11,302 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-31 00:14:11,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:11,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1561690001, now seen corresponding path program 1 times [2023-08-31 00:14:11,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:11,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462574043] [2023-08-31 00:14:11,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:11,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:14:11,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:14:11,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462574043] [2023-08-31 00:14:11,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462574043] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:14:11,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:14:11,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 00:14:11,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582239226] [2023-08-31 00:14:11,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:14:11,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:14:11,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:14:11,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:14:11,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:14:11,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 290 [2023-08-31 00:14:11,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:11,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:14:11,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 290 [2023-08-31 00:14:11,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:14:11,760 INFO L130 PetriNetUnfolder]: 1919/3175 cut-off events. [2023-08-31 00:14:11,760 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2023-08-31 00:14:11,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6326 conditions, 3175 events. 1919/3175 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 15999 event pairs, 823 based on Foata normal form. 197/2722 useless extension candidates. Maximal degree in co-relation 2292. Up to 2046 conditions per place. [2023-08-31 00:14:11,771 INFO L137 encePairwiseOnDemand]: 274/290 looper letters, 46 selfloop transitions, 2 changer transitions 6/58 dead transitions. [2023-08-31 00:14:11,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 248 flow [2023-08-31 00:14:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:14:11,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:14:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-08-31 00:14:11,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436781609195402 [2023-08-31 00:14:11,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-08-31 00:14:11,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-08-31 00:14:11,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:14:11,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-08-31 00:14:11,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:11,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:11,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:11,785 INFO L175 Difference]: Start difference. First operand has 39 places, 49 transitions, 116 flow. Second operand 3 states and 473 transitions. [2023-08-31 00:14:11,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 248 flow [2023-08-31 00:14:11,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 58 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:14:11,788 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 110 flow [2023-08-31 00:14:11,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-08-31 00:14:11,789 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-31 00:14:11,789 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 110 flow [2023-08-31 00:14:11,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:11,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:11,790 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 00:14:11,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 00:14:11,790 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-31 00:14:11,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:11,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1130747368, now seen corresponding path program 1 times [2023-08-31 00:14:11,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:11,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054701736] [2023-08-31 00:14:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:11,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:11,821 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:14:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:11,847 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:14:11,847 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:14:11,848 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-31 00:14:11,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-31 00:14:11,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-31 00:14:11,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-31 00:14:11,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 00:14:11,849 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-31 00:14:11,850 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:14:11,850 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 00:14:11,870 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 00:14:11,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 179 transitions, 388 flow [2023-08-31 00:14:11,919 INFO L130 PetriNetUnfolder]: 65/468 cut-off events. [2023-08-31 00:14:11,919 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:14:11,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 468 events. 65/468 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1836 event pairs, 1 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 329. Up to 16 conditions per place. [2023-08-31 00:14:11,923 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 179 transitions, 388 flow [2023-08-31 00:14:11,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 179 transitions, 388 flow [2023-08-31 00:14:11,925 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:14:11,926 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 179 transitions, 388 flow [2023-08-31 00:14:11,926 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 179 transitions, 388 flow [2023-08-31 00:14:11,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 179 transitions, 388 flow [2023-08-31 00:14:11,970 INFO L130 PetriNetUnfolder]: 65/468 cut-off events. [2023-08-31 00:14:11,970 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:14:11,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 468 events. 65/468 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1836 event pairs, 1 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 329. Up to 16 conditions per place. [2023-08-31 00:14:11,984 INFO L119 LiptonReduction]: Number of co-enabled transitions 12360 [2023-08-31 00:14:15,190 INFO L134 LiptonReduction]: Checked pairs total: 22561 [2023-08-31 00:14:15,190 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-08-31 00:14:15,192 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:14:15,193 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;@2061c7a2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:14:15,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-31 00:14:15,196 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-08-31 00:14:15,196 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:14:15,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:15,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 00:14:15,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:14:15,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:15,197 INFO L85 PathProgramCache]: Analyzing trace with hash 409853202, now seen corresponding path program 1 times [2023-08-31 00:14:15,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:15,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117832782] [2023-08-31 00:14:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:15,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:14:15,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:14:15,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117832782] [2023-08-31 00:14:15,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117832782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:14:15,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:14:15,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 00:14:15,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337890252] [2023-08-31 00:14:15,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:14:15,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:14:15,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:14:15,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:14:15,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:14:15,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 335 [2023-08-31 00:14:15,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 59 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:15,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:14:15,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 335 [2023-08-31 00:14:15,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:14:17,099 INFO L130 PetriNetUnfolder]: 15543/22667 cut-off events. [2023-08-31 00:14:17,100 INFO L131 PetriNetUnfolder]: For 721/721 co-relation queries the response was YES. [2023-08-31 00:14:17,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45254 conditions, 22667 events. 15543/22667 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 137707 event pairs, 6456 based on Foata normal form. 1640/20475 useless extension candidates. Maximal degree in co-relation 5826. Up to 14692 conditions per place. [2023-08-31 00:14:17,211 INFO L137 encePairwiseOnDemand]: 317/335 looper letters, 56 selfloop transitions, 2 changer transitions 7/70 dead transitions. [2023-08-31 00:14:17,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 309 flow [2023-08-31 00:14:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:14:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:14:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-08-31 00:14:17,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343283582089552 [2023-08-31 00:14:17,214 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-08-31 00:14:17,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-08-31 00:14:17,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:14:17,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-08-31 00:14:17,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:17,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:17,219 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:17,219 INFO L175 Difference]: Start difference. First operand has 48 places, 59 transitions, 148 flow. Second operand 3 states and 537 transitions. [2023-08-31 00:14:17,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 309 flow [2023-08-31 00:14:17,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 309 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:14:17,222 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 136 flow [2023-08-31 00:14:17,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-08-31 00:14:17,223 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2023-08-31 00:14:17,223 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 136 flow [2023-08-31 00:14:17,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:17,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:17,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:14:17,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 00:14:17,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:14:17,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:17,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1615311293, now seen corresponding path program 1 times [2023-08-31 00:14:17,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:17,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449664158] [2023-08-31 00:14:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:17,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:14:17,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:14:17,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449664158] [2023-08-31 00:14:17,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449664158] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:14:17,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985460889] [2023-08-31 00:14:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:17,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:14:17,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:14:17,297 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:14:17,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 00:14:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:17,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:14:17,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:14:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:14:17,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:14:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:14:17,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985460889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:14:17,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:14:17,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:14:17,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425221058] [2023-08-31 00:14:17,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:14:17,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:14:17,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:14:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:14:17,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:14:17,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 335 [2023-08-31 00:14:17,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 136 flow. Second operand has 7 states, 7 states have (on average 149.71428571428572) internal successors, (1048), 7 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:17,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:14:17,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 335 [2023-08-31 00:14:17,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:14:17,748 INFO L130 PetriNetUnfolder]: 1312/2176 cut-off events. [2023-08-31 00:14:17,748 INFO L131 PetriNetUnfolder]: For 635/635 co-relation queries the response was YES. [2023-08-31 00:14:17,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 2176 events. 1312/2176 cut-off events. For 635/635 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11364 event pairs, 0 based on Foata normal form. 0/2176 useless extension candidates. Maximal degree in co-relation 4810. Up to 1248 conditions per place. [2023-08-31 00:14:17,758 INFO L137 encePairwiseOnDemand]: 332/335 looper letters, 48 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-08-31 00:14:17,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 55 transitions, 238 flow [2023-08-31 00:14:17,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:14:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:14:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 938 transitions. [2023-08-31 00:14:17,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-31 00:14:17,762 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 938 transitions. [2023-08-31 00:14:17,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 938 transitions. [2023-08-31 00:14:17,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:14:17,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 938 transitions. [2023-08-31 00:14:17,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:17,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 335.0) internal successors, (2345), 7 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:17,769 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 335.0) internal successors, (2345), 7 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:17,769 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 136 flow. Second operand 6 states and 938 transitions. [2023-08-31 00:14:17,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 55 transitions, 238 flow [2023-08-31 00:14:17,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 230 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-31 00:14:17,772 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 74 flow [2023-08-31 00:14:17,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=74, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-08-31 00:14:17,775 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -12 predicate places. [2023-08-31 00:14:17,775 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 74 flow [2023-08-31 00:14:17,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 149.71428571428572) internal successors, (1048), 7 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:17,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:17,776 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 00:14:17,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 00:14:17,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-31 00:14:17,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:14:17,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:17,983 INFO L85 PathProgramCache]: Analyzing trace with hash 144683176, now seen corresponding path program 1 times [2023-08-31 00:14:17,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:17,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037461050] [2023-08-31 00:14:17,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:17,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:17,996 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:14:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:18,009 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:14:18,010 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:14:18,010 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-31 00:14:18,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-31 00:14:18,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-31 00:14:18,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-31 00:14:18,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-31 00:14:18,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 00:14:18,011 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:14:18,012 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:14:18,012 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 00:14:18,029 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 00:14:18,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 201 transitions, 446 flow [2023-08-31 00:14:18,114 INFO L130 PetriNetUnfolder]: 99/679 cut-off events. [2023-08-31 00:14:18,114 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:14:18,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 679 events. 99/679 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2925 event pairs, 6 based on Foata normal form. 0/576 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-31 00:14:18,120 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 201 transitions, 446 flow [2023-08-31 00:14:18,123 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 201 transitions, 446 flow [2023-08-31 00:14:18,123 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:14:18,124 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 201 transitions, 446 flow [2023-08-31 00:14:18,124 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 201 transitions, 446 flow [2023-08-31 00:14:18,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 201 transitions, 446 flow [2023-08-31 00:14:18,185 INFO L130 PetriNetUnfolder]: 99/679 cut-off events. [2023-08-31 00:14:18,185 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:14:18,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 679 events. 99/679 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2925 event pairs, 6 based on Foata normal form. 0/576 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-31 00:14:18,206 INFO L119 LiptonReduction]: Number of co-enabled transitions 18320 [2023-08-31 00:14:21,763 INFO L134 LiptonReduction]: Checked pairs total: 32417 [2023-08-31 00:14:21,763 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-08-31 00:14:21,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:14:21,766 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;@2061c7a2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:14:21,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-31 00:14:21,770 INFO L130 PetriNetUnfolder]: 8/31 cut-off events. [2023-08-31 00:14:21,770 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:14:21,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:21,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 00:14:21,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:14:21,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash -790134750, now seen corresponding path program 1 times [2023-08-31 00:14:21,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:21,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008966306] [2023-08-31 00:14:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:21,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:14:21,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:14:21,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008966306] [2023-08-31 00:14:21,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008966306] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:14:21,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:14:21,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 00:14:21,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407246886] [2023-08-31 00:14:21,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:14:21,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:14:21,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:14:21,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:14:21,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:14:21,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 373 [2023-08-31 00:14:21,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 71 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:21,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:14:21,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 373 [2023-08-31 00:14:21,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:14:32,882 INFO L130 PetriNetUnfolder]: 132302/183471 cut-off events. [2023-08-31 00:14:32,882 INFO L131 PetriNetUnfolder]: For 7370/7370 co-relation queries the response was YES. [2023-08-31 00:14:33,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364274 conditions, 183471 events. 132302/183471 cut-off events. For 7370/7370 co-relation queries the response was YES. Maximal size of possible extension queue 5167. Compared 1322902 event pairs, 58795 based on Foata normal form. 20324/171151 useless extension candidates. Maximal degree in co-relation 47736. Up to 113276 conditions per place. [2023-08-31 00:14:34,115 INFO L137 encePairwiseOnDemand]: 348/373 looper letters, 77 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2023-08-31 00:14:34,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 88 transitions, 394 flow [2023-08-31 00:14:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:14:34,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:14:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-31 00:14:34,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546916890080429 [2023-08-31 00:14:34,118 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-31 00:14:34,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-31 00:14:34,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:14:34,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-31 00:14:34,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:34,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:34,124 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:34,124 INFO L175 Difference]: Start difference. First operand has 58 places, 71 transitions, 186 flow. Second operand 3 states and 612 transitions. [2023-08-31 00:14:34,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 88 transitions, 394 flow [2023-08-31 00:14:34,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 88 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:14:34,130 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 190 flow [2023-08-31 00:14:34,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-08-31 00:14:34,132 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-31 00:14:34,132 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 190 flow [2023-08-31 00:14:34,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:34,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:34,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:14:34,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 00:14:34,133 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:14:34,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:34,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1609168512, now seen corresponding path program 1 times [2023-08-31 00:14:34,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:34,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597588299] [2023-08-31 00:14:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:34,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:14:34,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:14:34,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597588299] [2023-08-31 00:14:34,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597588299] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:14:34,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569879858] [2023-08-31 00:14:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:34,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:14:34,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:14:34,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:14:34,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 00:14:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:34,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:14:34,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:14:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:14:34,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:14:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:14:34,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569879858] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:14:34,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:14:34,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:14:34,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538197544] [2023-08-31 00:14:34,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:14:34,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:14:34,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:14:34,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:14:34,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:14:34,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 373 [2023-08-31 00:14:34,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 190 flow. Second operand has 7 states, 7 states have (on average 165.85714285714286) internal successors, (1161), 7 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:34,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:14:34,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 373 [2023-08-31 00:14:34,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:14:43,681 INFO L130 PetriNetUnfolder]: 121992/168887 cut-off events. [2023-08-31 00:14:43,681 INFO L131 PetriNetUnfolder]: For 29796/29796 co-relation queries the response was YES. [2023-08-31 00:14:43,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370145 conditions, 168887 events. 121992/168887 cut-off events. For 29796/29796 co-relation queries the response was YES. Maximal size of possible extension queue 4832. Compared 1212095 event pairs, 21764 based on Foata normal form. 0/153825 useless extension candidates. Maximal degree in co-relation 84596. Up to 155017 conditions per place. [2023-08-31 00:14:44,720 INFO L137 encePairwiseOnDemand]: 369/373 looper letters, 96 selfloop transitions, 6 changer transitions 0/109 dead transitions. [2023-08-31 00:14:44,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 109 transitions, 502 flow [2023-08-31 00:14:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:14:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:14:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1081 transitions. [2023-08-31 00:14:44,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830205540661305 [2023-08-31 00:14:44,728 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1081 transitions. [2023-08-31 00:14:44,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1081 transitions. [2023-08-31 00:14:44,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:14:44,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1081 transitions. [2023-08-31 00:14:44,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.16666666666666) internal successors, (1081), 6 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:44,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:44,735 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:44,735 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 190 flow. Second operand 6 states and 1081 transitions. [2023-08-31 00:14:44,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 109 transitions, 502 flow [2023-08-31 00:14:44,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 109 transitions, 494 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 00:14:44,798 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 224 flow [2023-08-31 00:14:44,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2023-08-31 00:14:44,799 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2023-08-31 00:14:44,799 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 224 flow [2023-08-31 00:14:44,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.85714285714286) internal successors, (1161), 7 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:44,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:44,800 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 00:14:44,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 00:14:45,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-31 00:14:45,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:14:45,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:45,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1174682695, now seen corresponding path program 1 times [2023-08-31 00:14:45,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:45,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616289938] [2023-08-31 00:14:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:45,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:45,039 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:14:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:45,068 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:14:45,068 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:14:45,069 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-31 00:14:45,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-31 00:14:45,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-31 00:14:45,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-31 00:14:45,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-31 00:14:45,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-31 00:14:45,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 00:14:45,071 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:14:45,072 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:14:45,072 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 00:14:45,103 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-31 00:14:45,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 223 transitions, 506 flow [2023-08-31 00:14:45,215 INFO L130 PetriNetUnfolder]: 161/1022 cut-off events. [2023-08-31 00:14:45,216 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 00:14:45,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 1022 events. 161/1022 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4919 event pairs, 23 based on Foata normal form. 0/872 useless extension candidates. Maximal degree in co-relation 724. Up to 80 conditions per place. [2023-08-31 00:14:45,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 223 transitions, 506 flow [2023-08-31 00:14:45,231 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 223 transitions, 506 flow [2023-08-31 00:14:45,232 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:14:45,232 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 223 transitions, 506 flow [2023-08-31 00:14:45,232 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 223 transitions, 506 flow [2023-08-31 00:14:45,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 223 transitions, 506 flow [2023-08-31 00:14:45,325 INFO L130 PetriNetUnfolder]: 161/1022 cut-off events. [2023-08-31 00:14:45,325 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 00:14:45,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 1022 events. 161/1022 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4919 event pairs, 23 based on Foata normal form. 0/872 useless extension candidates. Maximal degree in co-relation 724. Up to 80 conditions per place. [2023-08-31 00:14:45,353 INFO L119 LiptonReduction]: Number of co-enabled transitions 25200 [2023-08-31 00:14:48,765 INFO L134 LiptonReduction]: Checked pairs total: 46889 [2023-08-31 00:14:48,765 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-08-31 00:14:48,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:14:48,767 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;@2061c7a2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:14:48,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-31 00:14:48,770 INFO L130 PetriNetUnfolder]: 8/31 cut-off events. [2023-08-31 00:14:48,770 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:14:48,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:48,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 00:14:48,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 00:14:48,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:48,771 INFO L85 PathProgramCache]: Analyzing trace with hash -866863995, now seen corresponding path program 1 times [2023-08-31 00:14:48,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:48,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565989796] [2023-08-31 00:14:48,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:48,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:14:48,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:14:48,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565989796] [2023-08-31 00:14:48,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565989796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:14:48,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:14:48,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 00:14:48,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257635058] [2023-08-31 00:14:48,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:14:48,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:14:48,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:14:48,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:14:48,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:14:48,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 411 [2023-08-31 00:14:48,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 83 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:48,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:14:48,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 411 [2023-08-31 00:14:48,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:16:58,460 INFO L130 PetriNetUnfolder]: 1236886/1576394 cut-off events. [2023-08-31 00:16:58,460 INFO L131 PetriNetUnfolder]: For 68908/68908 co-relation queries the response was YES. [2023-08-31 00:17:02,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3163722 conditions, 1576394 events. 1236886/1576394 cut-off events. For 68908/68908 co-relation queries the response was YES. Maximal size of possible extension queue 29804. Compared 11035929 event pairs, 475757 based on Foata normal form. 151424/1450128 useless extension candidates. Maximal degree in co-relation 370168. Up to 1160270 conditions per place.