./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 06:56:01,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 06:56:01,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 06:56:01,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 06:56:01,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 06:56:01,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 06:56:01,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 06:56:01,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 06:56:01,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 06:56:01,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 06:56:01,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 06:56:01,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 06:56:01,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 06:56:01,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 06:56:01,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 06:56:01,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 06:56:01,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 06:56:01,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 06:56:01,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 06:56:01,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 06:56:01,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 06:56:01,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 06:56:01,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 06:56:01,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 06:56:01,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 06:56:01,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 06:56:01,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 06:56:01,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 06:56:01,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 06:56:01,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 06:56:01,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 06:56:01,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 06:56:01,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 06:56:01,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 06:56:01,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 06:56:01,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 06:56:01,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 06:56:01,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 06:56:01,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 06:56:01,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 06:56:01,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 06:56:01,198 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 06:56:01,217 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 06:56:01,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 06:56:01,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 06:56:01,219 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 06:56:01,220 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 06:56:01,220 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 06:56:01,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 06:56:01,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 06:56:01,221 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 06:56:01,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 06:56:01,221 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 06:56:01,222 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 06:56:01,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 06:56:01,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 06:56:01,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 06:56:01,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 06:56:01,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 06:56:01,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 06:56:01,222 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 06:56:01,223 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 06:56:01,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 06:56:01,223 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 06:56:01,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 06:56:01,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 06:56:01,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 06:56:01,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 06:56:01,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:56:01,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 06:56:01,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 06:56:01,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 06:56:01,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 06:56:01,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 06:56:01,224 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 06:56:01,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 06:56:01,225 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 06:56:01,225 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 06:56:01,225 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 06:56:01,225 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 06:56:01,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 06:56:01,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 06:56:01,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 06:56:01,523 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 06:56:01,523 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 06:56:01,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-09-01 06:56:02,486 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 06:56:02,748 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 06:56:02,749 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-09-01 06:56:02,758 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0b5f4278/4f81ffa0437749d38850c5b4ed40a39a/FLAG6594a19ce [2023-09-01 06:56:02,768 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0b5f4278/4f81ffa0437749d38850c5b4ed40a39a [2023-09-01 06:56:02,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 06:56:02,771 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 06:56:02,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 06:56:02,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 06:56:02,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 06:56:02,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:56:02" (1/1) ... [2023-09-01 06:56:02,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33658b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:02, skipping insertion in model container [2023-09-01 06:56:02,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:56:02" (1/1) ... [2023-09-01 06:56:02,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 06:56:02,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 06:56:03,190 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_74-tricky_address1_racefree.i[41323,41336] [2023-09-01 06:56:03,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:56:03,246 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 06:56:03,283 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_74-tricky_address1_racefree.i[41323,41336] [2023-09-01 06:56:03,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:56:03,359 INFO L208 MainTranslator]: Completed translation [2023-09-01 06:56:03,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:03 WrapperNode [2023-09-01 06:56:03,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 06:56:03,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 06:56:03,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 06:56:03,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 06:56:03,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:03" (1/1) ... [2023-09-01 06:56:03,392 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:03" (1/1) ... [2023-09-01 06:56:03,419 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 204 [2023-09-01 06:56:03,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 06:56:03,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 06:56:03,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 06:56:03,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 06:56:03,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:03" (1/1) ... [2023-09-01 06:56:03,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:03" (1/1) ... [2023-09-01 06:56:03,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:03" (1/1) ... [2023-09-01 06:56:03,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:03" (1/1) ... [2023-09-01 06:56:03,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:03" (1/1) ... [2023-09-01 06:56:03,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:03" (1/1) ... [2023-09-01 06:56:03,459 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:03" (1/1) ... [2023-09-01 06:56:03,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:03" (1/1) ... [2023-09-01 06:56:03,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 06:56:03,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 06:56:03,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 06:56:03,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 06:56:03,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:03" (1/1) ... [2023-09-01 06:56:03,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:56:03,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:56:03,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 06:56:03,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 06:56:03,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 06:56:03,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 06:56:03,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 06:56:03,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 06:56:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 06:56:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 06:56:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 06:56:03,516 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 06:56:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 06:56:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 06:56:03,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 06:56:03,517 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 06:56:03,696 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 06:56:03,697 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 06:56:03,945 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 06:56:03,951 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 06:56:03,955 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-09-01 06:56:03,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:56:03 BoogieIcfgContainer [2023-09-01 06:56:03,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 06:56:03,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 06:56:03,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 06:56:03,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 06:56:03,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 06:56:02" (1/3) ... [2023-09-01 06:56:03,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47babf27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:56:03, skipping insertion in model container [2023-09-01 06:56:03,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:03" (2/3) ... [2023-09-01 06:56:03,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47babf27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:56:03, skipping insertion in model container [2023-09-01 06:56:03,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:56:03" (3/3) ... [2023-09-01 06:56:03,965 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2023-09-01 06:56:03,971 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 06:56:03,977 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 06:56:03,978 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-09-01 06:56:03,978 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 06:56:04,062 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 06:56:04,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 216 transitions, 440 flow [2023-09-01 06:56:04,188 INFO L130 PetriNetUnfolder]: 45/293 cut-off events. [2023-09-01 06:56:04,191 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-09-01 06:56:04,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 293 events. 45/293 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 998 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2023-09-01 06:56:04,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 188 places, 216 transitions, 440 flow [2023-09-01 06:56:04,204 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 205 transitions, 415 flow [2023-09-01 06:56:04,207 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:56:04,213 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 205 transitions, 415 flow [2023-09-01 06:56:04,215 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 205 transitions, 415 flow [2023-09-01 06:56:04,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 205 transitions, 415 flow [2023-09-01 06:56:04,251 INFO L130 PetriNetUnfolder]: 44/282 cut-off events. [2023-09-01 06:56:04,251 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:56:04,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 282 events. 44/282 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 944 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2023-09-01 06:56:04,257 INFO L119 LiptonReduction]: Number of co-enabled transitions 13050 [2023-09-01 06:56:06,629 INFO L134 LiptonReduction]: Checked pairs total: 21856 [2023-09-01 06:56:06,629 INFO L136 LiptonReduction]: Total number of compositions: 178 [2023-09-01 06:56:06,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:56:06,651 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;@9ef7bb8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:56:06,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:56:06,657 INFO L130 PetriNetUnfolder]: 11/44 cut-off events. [2023-09-01 06:56:06,657 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:56:06,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:06,658 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 06:56:06,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:06,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:06,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1194161998, now seen corresponding path program 1 times [2023-09-01 06:56:06,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:06,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444110814] [2023-09-01 06:56:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:06,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:56:06,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:06,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444110814] [2023-09-01 06:56:06,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444110814] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:56:06,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:56:06,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:56:06,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514003941] [2023-09-01 06:56:06,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:56:06,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:56:06,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:06,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:56:06,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:56:06,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 394 [2023-09-01 06:56:06,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 74 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:06,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:06,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 394 [2023-09-01 06:56:06,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:56:07,123 INFO L130 PetriNetUnfolder]: 454/967 cut-off events. [2023-09-01 06:56:07,124 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:56:07,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1868 conditions, 967 events. 454/967 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5366 event pairs, 414 based on Foata normal form. 131/814 useless extension candidates. Maximal degree in co-relation 1806. Up to 894 conditions per place. [2023-09-01 06:56:07,129 INFO L137 encePairwiseOnDemand]: 369/394 looper letters, 26 selfloop transitions, 2 changer transitions 21/53 dead transitions. [2023-09-01 06:56:07,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 203 flow [2023-09-01 06:56:07,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:56:07,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:56:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-09-01 06:56:07,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177664974619289 [2023-09-01 06:56:07,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-09-01 06:56:07,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-09-01 06:56:07,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:56:07,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-09-01 06:56:07,155 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) [2023-09-01 06:56:07,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:07,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:07,163 INFO L175 Difference]: Start difference. First operand has 53 places, 74 transitions, 153 flow. Second operand 3 states and 612 transitions. [2023-09-01 06:56:07,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 203 flow [2023-09-01 06:56:07,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 53 transitions, 203 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:56:07,168 INFO L231 Difference]: Finished difference. Result has 55 places, 32 transitions, 79 flow [2023-09-01 06:56:07,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=55, PETRI_TRANSITIONS=32} [2023-09-01 06:56:07,172 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-09-01 06:56:07,172 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 32 transitions, 79 flow [2023-09-01 06:56:07,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:07,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:07,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 06:56:07,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 06:56:07,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:07,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:07,176 INFO L85 PathProgramCache]: Analyzing trace with hash -515934527, now seen corresponding path program 1 times [2023-09-01 06:56:07,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:07,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058114484] [2023-09-01 06:56:07,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:07,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:56:07,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:07,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058114484] [2023-09-01 06:56:07,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058114484] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:56:07,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592269038] [2023-09-01 06:56:07,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:07,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:56:07,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:56:07,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:56:07,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 06:56:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:07,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:56:07,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:56:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:56:07,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:56:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:56:07,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592269038] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:56:07,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:56:07,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 06:56:07,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367373141] [2023-09-01 06:56:07,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:56:07,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:56:07,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:07,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:56:07,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:56:07,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 394 [2023-09-01 06:56:07,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 32 transitions, 79 flow. Second operand has 7 states, 7 states have (on average 181.57142857142858) internal successors, (1271), 7 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:07,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:07,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 394 [2023-09-01 06:56:07,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:56:07,541 INFO L130 PetriNetUnfolder]: 97/233 cut-off events. [2023-09-01 06:56:07,541 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:56:07,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 233 events. 97/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 864 event pairs, 90 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 451. Up to 210 conditions per place. [2023-09-01 06:56:07,542 INFO L137 encePairwiseOnDemand]: 391/394 looper letters, 26 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-09-01 06:56:07,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 153 flow [2023-09-01 06:56:07,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:56:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:56:07,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1114 transitions. [2023-09-01 06:56:07,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4712351945854484 [2023-09-01 06:56:07,544 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1114 transitions. [2023-09-01 06:56:07,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1114 transitions. [2023-09-01 06:56:07,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:56:07,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1114 transitions. [2023-09-01 06:56:07,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.66666666666666) internal successors, (1114), 6 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:07,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 394.0) internal successors, (2758), 7 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:07,550 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 394.0) internal successors, (2758), 7 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:07,551 INFO L175 Difference]: Start difference. First operand has 55 places, 32 transitions, 79 flow. Second operand 6 states and 1114 transitions. [2023-09-01 06:56:07,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 153 flow [2023-09-01 06:56:07,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 149 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 06:56:07,552 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 111 flow [2023-09-01 06:56:07,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-09-01 06:56:07,553 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -11 predicate places. [2023-09-01 06:56:07,553 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 111 flow [2023-09-01 06:56:07,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 181.57142857142858) internal successors, (1271), 7 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:07,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:07,554 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 06:56:07,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 06:56:07,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:56:07,761 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:07,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:07,762 INFO L85 PathProgramCache]: Analyzing trace with hash -475720590, now seen corresponding path program 2 times [2023-09-01 06:56:07,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:07,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756348651] [2023-09-01 06:56:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:07,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:56:07,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:07,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756348651] [2023-09-01 06:56:07,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756348651] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:56:07,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744381578] [2023-09-01 06:56:07,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 06:56:07,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:56:07,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:56:07,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:56:07,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 06:56:07,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 06:56:07,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 06:56:07,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 06:56:07,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:56:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:56:07,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:56:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:56:08,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744381578] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:56:08,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:56:08,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 06:56:08,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064623091] [2023-09-01 06:56:08,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:56:08,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:56:08,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:08,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:56:08,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:56:08,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 394 [2023-09-01 06:56:08,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 111 flow. Second operand has 13 states, 13 states have (on average 181.30769230769232) internal successors, (2357), 13 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:08,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:08,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 394 [2023-09-01 06:56:08,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:56:08,133 INFO L130 PetriNetUnfolder]: 97/239 cut-off events. [2023-09-01 06:56:08,133 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 06:56:08,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500 conditions, 239 events. 97/239 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 864 event pairs, 90 based on Foata normal form. 6/157 useless extension candidates. Maximal degree in co-relation 442. Up to 210 conditions per place. [2023-09-01 06:56:08,134 INFO L137 encePairwiseOnDemand]: 391/394 looper letters, 26 selfloop transitions, 11 changer transitions 0/41 dead transitions. [2023-09-01 06:56:08,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 41 transitions, 221 flow [2023-09-01 06:56:08,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 06:56:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 06:56:08,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2203 transitions. [2023-09-01 06:56:08,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659475465313029 [2023-09-01 06:56:08,139 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2203 transitions. [2023-09-01 06:56:08,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2203 transitions. [2023-09-01 06:56:08,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:56:08,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2203 transitions. [2023-09-01 06:56:08,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 183.58333333333334) internal successors, (2203), 12 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:08,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 394.0) internal successors, (5122), 13 states have internal predecessors, (5122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:08,160 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 394.0) internal successors, (5122), 13 states have internal predecessors, (5122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:08,160 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 111 flow. Second operand 12 states and 2203 transitions. [2023-09-01 06:56:08,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 41 transitions, 221 flow [2023-09-01 06:56:08,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 41 transitions, 207 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 06:56:08,163 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 181 flow [2023-09-01 06:56:08,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-09-01 06:56:08,164 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 5 predicate places. [2023-09-01 06:56:08,164 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 181 flow [2023-09-01 06:56:08,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 181.30769230769232) internal successors, (2357), 13 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:08,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:08,168 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 06:56:08,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 06:56:08,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 06:56:08,373 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:08,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:08,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2063180306, now seen corresponding path program 3 times [2023-09-01 06:56:08,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:08,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451761372] [2023-09-01 06:56:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:08,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:56:08,404 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:56:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:56:08,445 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:56:08,446 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:56:08,446 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:56:08,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 06:56:08,447 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 06:56:08,449 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:56:08,449 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:56:08,449 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 06:56:08,473 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 06:56:08,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 293 transitions, 604 flow [2023-09-01 06:56:08,514 INFO L130 PetriNetUnfolder]: 75/483 cut-off events. [2023-09-01 06:56:08,514 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 06:56:08,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 483 events. 75/483 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2032 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 295. Up to 12 conditions per place. [2023-09-01 06:56:08,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 293 transitions, 604 flow [2023-09-01 06:56:08,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 291 transitions, 600 flow [2023-09-01 06:56:08,520 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:56:08,520 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 291 transitions, 600 flow [2023-09-01 06:56:08,520 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 291 transitions, 600 flow [2023-09-01 06:56:08,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 291 transitions, 600 flow [2023-09-01 06:56:08,567 INFO L130 PetriNetUnfolder]: 75/481 cut-off events. [2023-09-01 06:56:08,567 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 06:56:08,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 481 events. 75/481 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2009 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 293. Up to 12 conditions per place. [2023-09-01 06:56:08,585 INFO L119 LiptonReduction]: Number of co-enabled transitions 40200 [2023-09-01 06:56:11,461 INFO L134 LiptonReduction]: Checked pairs total: 72218 [2023-09-01 06:56:11,462 INFO L136 LiptonReduction]: Total number of compositions: 251 [2023-09-01 06:56:11,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:56:11,464 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;@9ef7bb8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:56:11,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:56:11,470 INFO L130 PetriNetUnfolder]: 36/120 cut-off events. [2023-09-01 06:56:11,470 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 06:56:11,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:11,470 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 06:56:11,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:11,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:11,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1526394189, now seen corresponding path program 1 times [2023-09-01 06:56:11,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:11,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749937648] [2023-09-01 06:56:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:11,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:56:11,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:11,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749937648] [2023-09-01 06:56:11,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749937648] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:56:11,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:56:11,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:56:11,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243964900] [2023-09-01 06:56:11,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:56:11,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:56:11,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:11,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:56:11,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:56:11,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 544 [2023-09-01 06:56:11,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 113 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:11,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:11,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 544 [2023-09-01 06:56:11,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:56:13,371 INFO L130 PetriNetUnfolder]: 18204/28758 cut-off events. [2023-09-01 06:56:13,373 INFO L131 PetriNetUnfolder]: For 128/128 co-relation queries the response was YES. [2023-09-01 06:56:13,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55582 conditions, 28758 events. 18204/28758 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 1178. Compared 214669 event pairs, 17105 based on Foata normal form. 4139/24418 useless extension candidates. Maximal degree in co-relation 24620. Up to 26706 conditions per place. [2023-09-01 06:56:13,441 INFO L137 encePairwiseOnDemand]: 510/544 looper letters, 44 selfloop transitions, 2 changer transitions 28/83 dead transitions. [2023-09-01 06:56:13,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 326 flow [2023-09-01 06:56:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:56:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:56:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 832 transitions. [2023-09-01 06:56:13,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2023-09-01 06:56:13,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 832 transitions. [2023-09-01 06:56:13,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 832 transitions. [2023-09-01 06:56:13,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:56:13,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 832 transitions. [2023-09-01 06:56:13,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:13,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 544.0) internal successors, (2176), 4 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:13,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 544.0) internal successors, (2176), 4 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:13,449 INFO L175 Difference]: Start difference. First operand has 81 places, 113 transitions, 244 flow. Second operand 3 states and 832 transitions. [2023-09-01 06:56:13,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 326 flow [2023-09-01 06:56:13,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 326 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:56:13,455 INFO L231 Difference]: Finished difference. Result has 84 places, 55 transitions, 132 flow [2023-09-01 06:56:13,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=84, PETRI_TRANSITIONS=55} [2023-09-01 06:56:13,456 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 3 predicate places. [2023-09-01 06:56:13,457 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 55 transitions, 132 flow [2023-09-01 06:56:13,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:13,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:13,457 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 06:56:13,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 06:56:13,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:13,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:13,458 INFO L85 PathProgramCache]: Analyzing trace with hash -607571975, now seen corresponding path program 1 times [2023-09-01 06:56:13,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:13,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400307540] [2023-09-01 06:56:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:13,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:56:13,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:13,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400307540] [2023-09-01 06:56:13,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400307540] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:56:13,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242395806] [2023-09-01 06:56:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:13,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:56:13,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:56:13,513 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:56:13,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 06:56:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:13,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:56:13,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:56:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:56:13,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:56:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:56:13,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242395806] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:56:13,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:56:13,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 06:56:13,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048316367] [2023-09-01 06:56:13,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:56:13,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:56:13,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:13,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:56:13,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:56:13,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 544 [2023-09-01 06:56:13,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 55 transitions, 132 flow. Second operand has 7 states, 7 states have (on average 243.71428571428572) internal successors, (1706), 7 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:13,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:13,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 544 [2023-09-01 06:56:13,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:56:14,021 INFO L130 PetriNetUnfolder]: 3866/6297 cut-off events. [2023-09-01 06:56:14,021 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-09-01 06:56:14,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12210 conditions, 6297 events. 3866/6297 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 42417 event pairs, 3649 based on Foata normal form. 0/4047 useless extension candidates. Maximal degree in co-relation 12197. Up to 5821 conditions per place. [2023-09-01 06:56:14,039 INFO L137 encePairwiseOnDemand]: 541/544 looper letters, 44 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-09-01 06:56:14,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 242 flow [2023-09-01 06:56:14,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:56:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:56:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1504 transitions. [2023-09-01 06:56:14,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2023-09-01 06:56:14,043 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1504 transitions. [2023-09-01 06:56:14,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1504 transitions. [2023-09-01 06:56:14,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:56:14,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1504 transitions. [2023-09-01 06:56:14,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 250.66666666666666) internal successors, (1504), 6 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:14,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 544.0) internal successors, (3808), 7 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:14,050 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 544.0) internal successors, (3808), 7 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:14,050 INFO L175 Difference]: Start difference. First operand has 84 places, 55 transitions, 132 flow. Second operand 6 states and 1504 transitions. [2023-09-01 06:56:14,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 242 flow [2023-09-01 06:56:14,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 58 transitions, 236 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 06:56:14,053 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 162 flow [2023-09-01 06:56:14,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-09-01 06:56:14,055 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -15 predicate places. [2023-09-01 06:56:14,056 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 162 flow [2023-09-01 06:56:14,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 243.71428571428572) internal successors, (1706), 7 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:14,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:14,056 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 06:56:14,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 06:56:14,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:56:14,261 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:14,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:14,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1036793933, now seen corresponding path program 2 times [2023-09-01 06:56:14,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:14,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434575895] [2023-09-01 06:56:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:14,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:56:14,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:14,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434575895] [2023-09-01 06:56:14,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434575895] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:56:14,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849408092] [2023-09-01 06:56:14,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 06:56:14,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:56:14,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:56:14,316 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:56:14,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 06:56:14,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 06:56:14,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 06:56:14,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 06:56:14,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:56:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:56:14,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:56:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:56:14,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849408092] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:56:14,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:56:14,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 06:56:14,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806119644] [2023-09-01 06:56:14,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:56:14,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:56:14,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:14,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:56:14,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:56:14,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 544 [2023-09-01 06:56:14,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 162 flow. Second operand has 13 states, 13 states have (on average 243.3846153846154) internal successors, (3164), 13 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:14,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:14,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 544 [2023-09-01 06:56:14,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:56:14,886 INFO L130 PetriNetUnfolder]: 3866/6303 cut-off events. [2023-09-01 06:56:14,886 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-09-01 06:56:14,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12239 conditions, 6303 events. 3866/6303 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 42376 event pairs, 3649 based on Foata normal form. 6/4060 useless extension candidates. Maximal degree in co-relation 12180. Up to 5821 conditions per place. [2023-09-01 06:56:14,904 INFO L137 encePairwiseOnDemand]: 541/544 looper letters, 44 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2023-09-01 06:56:14,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 64 transitions, 308 flow [2023-09-01 06:56:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 06:56:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 06:56:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2965 transitions. [2023-09-01 06:56:14,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45419730392156865 [2023-09-01 06:56:14,916 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2965 transitions. [2023-09-01 06:56:14,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2965 transitions. [2023-09-01 06:56:14,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:56:14,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2965 transitions. [2023-09-01 06:56:14,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 247.08333333333334) internal successors, (2965), 12 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:14,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 544.0) internal successors, (7072), 13 states have internal predecessors, (7072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:14,930 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 544.0) internal successors, (7072), 13 states have internal predecessors, (7072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:14,930 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 162 flow. Second operand 12 states and 2965 transitions. [2023-09-01 06:56:14,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 64 transitions, 308 flow [2023-09-01 06:56:14,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 64 transitions, 294 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 06:56:14,933 INFO L231 Difference]: Finished difference. Result has 82 places, 64 transitions, 232 flow [2023-09-01 06:56:14,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=232, PETRI_PLACES=82, PETRI_TRANSITIONS=64} [2023-09-01 06:56:14,934 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 1 predicate places. [2023-09-01 06:56:14,934 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 64 transitions, 232 flow [2023-09-01 06:56:14,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 243.3846153846154) internal successors, (3164), 13 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:14,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:14,936 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 06:56:14,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 06:56:15,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:56:15,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:15,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:15,141 INFO L85 PathProgramCache]: Analyzing trace with hash 500881613, now seen corresponding path program 3 times [2023-09-01 06:56:15,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:15,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359474839] [2023-09-01 06:56:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:15,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:56:15,169 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:56:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:56:15,185 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:56:15,186 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:56:15,186 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:56:15,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 06:56:15,186 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 06:56:15,186 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:56:15,187 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:56:15,187 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 06:56:15,220 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 06:56:15,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 370 transitions, 770 flow [2023-09-01 06:56:15,278 INFO L130 PetriNetUnfolder]: 110/712 cut-off events. [2023-09-01 06:56:15,278 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 06:56:15,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 712 events. 110/712 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3261 event pairs, 1 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 491. Up to 16 conditions per place. [2023-09-01 06:56:15,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 318 places, 370 transitions, 770 flow [2023-09-01 06:56:15,291 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 316 places, 368 transitions, 766 flow [2023-09-01 06:56:15,291 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:56:15,291 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 316 places, 368 transitions, 766 flow [2023-09-01 06:56:15,291 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 316 places, 368 transitions, 766 flow [2023-09-01 06:56:15,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 316 places, 368 transitions, 766 flow [2023-09-01 06:56:15,347 INFO L130 PetriNetUnfolder]: 110/710 cut-off events. [2023-09-01 06:56:15,348 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 06:56:15,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 710 events. 110/710 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3255 event pairs, 1 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 489. Up to 16 conditions per place. [2023-09-01 06:56:15,374 INFO L119 LiptonReduction]: Number of co-enabled transitions 77850 [2023-09-01 06:56:19,313 INFO L134 LiptonReduction]: Checked pairs total: 141588 [2023-09-01 06:56:19,314 INFO L136 LiptonReduction]: Total number of compositions: 316 [2023-09-01 06:56:19,315 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:56:19,315 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;@9ef7bb8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:56:19,316 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:56:19,325 INFO L130 PetriNetUnfolder]: 60/196 cut-off events. [2023-09-01 06:56:19,326 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 06:56:19,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:19,326 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 06:56:19,326 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:19,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:19,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1592646139, now seen corresponding path program 1 times [2023-09-01 06:56:19,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:19,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437095172] [2023-09-01 06:56:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:19,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:56:19,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:19,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437095172] [2023-09-01 06:56:19,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437095172] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:56:19,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:56:19,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:56:19,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038785571] [2023-09-01 06:56:19,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:56:19,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:56:19,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:19,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:56:19,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:56:19,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 686 [2023-09-01 06:56:19,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 147 transitions, 324 flow. Second operand has 3 states, 3 states have (on average 307.3333333333333) internal successors, (922), 3 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:19,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:19,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 686 [2023-09-01 06:56:19,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:57:00,927 INFO L130 PetriNetUnfolder]: 574142/783224 cut-off events. [2023-09-01 06:57:00,927 INFO L131 PetriNetUnfolder]: For 5109/5109 co-relation queries the response was YES. [2023-09-01 06:57:02,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1544042 conditions, 783224 events. 574142/783224 cut-off events. For 5109/5109 co-relation queries the response was YES. Maximal size of possible extension queue 19831. Compared 6248068 event pairs, 554452 based on Foata normal form. 98874/655857 useless extension candidates. Maximal degree in co-relation 329878. Up to 757862 conditions per place. [2023-09-01 06:57:02,979 INFO L137 encePairwiseOnDemand]: 641/686 looper letters, 65 selfloop transitions, 2 changer transitions 29/106 dead transitions. [2023-09-01 06:57:02,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 106 transitions, 428 flow [2023-09-01 06:57:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:57:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:57:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1051 transitions. [2023-09-01 06:57:02,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510689990281827 [2023-09-01 06:57:02,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1051 transitions. [2023-09-01 06:57:02,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1051 transitions. [2023-09-01 06:57:02,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:57:02,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1051 transitions. [2023-09-01 06:57:02,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.3333333333333) internal successors, (1051), 3 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:02,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:02,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:02,987 INFO L175 Difference]: Start difference. First operand has 104 places, 147 transitions, 324 flow. Second operand 3 states and 1051 transitions. [2023-09-01 06:57:02,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 106 transitions, 428 flow [2023-09-01 06:57:02,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 106 transitions, 428 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:57:02,990 INFO L231 Difference]: Finished difference. Result has 107 places, 77 transitions, 185 flow [2023-09-01 06:57:02,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=107, PETRI_TRANSITIONS=77} [2023-09-01 06:57:02,991 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 3 predicate places. [2023-09-01 06:57:02,991 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 77 transitions, 185 flow [2023-09-01 06:57:02,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 307.3333333333333) internal successors, (922), 3 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:02,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:02,991 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:57:02,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 06:57:02,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:02,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:02,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1869305623, now seen corresponding path program 1 times [2023-09-01 06:57:02,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:02,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949318749] [2023-09-01 06:57:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:02,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:57:03,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:57:03,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949318749] [2023-09-01 06:57:03,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949318749] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:57:03,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808140268] [2023-09-01 06:57:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:03,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:57:03,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:57:03,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:57:03,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 06:57:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:03,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:57:03,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:57:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:57:03,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:57:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:57:03,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808140268] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:57:03,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:57:03,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 06:57:03,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368857023] [2023-09-01 06:57:03,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:57:03,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:57:03,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:57:03,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:57:03,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:57:03,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 686 [2023-09-01 06:57:03,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 77 transitions, 185 flow. Second operand has 7 states, 7 states have (on average 305.85714285714283) internal successors, (2141), 7 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:03,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:57:03,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 686 [2023-09-01 06:57:03,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:57:11,719 INFO L130 PetriNetUnfolder]: 124250/171007 cut-off events. [2023-09-01 06:57:11,719 INFO L131 PetriNetUnfolder]: For 2404/2404 co-relation queries the response was YES. [2023-09-01 06:57:11,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338086 conditions, 171007 events. 124250/171007 cut-off events. For 2404/2404 co-relation queries the response was YES. Maximal size of possible extension queue 5854. Compared 1265818 event pairs, 119875 based on Foata normal form. 0/113230 useless extension candidates. Maximal degree in co-relation 338072. Up to 165349 conditions per place. [2023-09-01 06:57:12,269 INFO L137 encePairwiseOnDemand]: 683/686 looper letters, 65 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2023-09-01 06:57:12,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 80 transitions, 337 flow [2023-09-01 06:57:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:57:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:57:12,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1897 transitions. [2023-09-01 06:57:12,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608843537414966 [2023-09-01 06:57:12,273 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1897 transitions. [2023-09-01 06:57:12,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1897 transitions. [2023-09-01 06:57:12,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:57:12,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1897 transitions. [2023-09-01 06:57:12,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 316.1666666666667) internal successors, (1897), 6 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:12,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 686.0) internal successors, (4802), 7 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:12,285 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 686.0) internal successors, (4802), 7 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:12,285 INFO L175 Difference]: Start difference. First operand has 107 places, 77 transitions, 185 flow. Second operand 6 states and 1897 transitions. [2023-09-01 06:57:12,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 80 transitions, 337 flow [2023-09-01 06:57:12,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 80 transitions, 327 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 06:57:12,291 INFO L231 Difference]: Finished difference. Result has 89 places, 80 transitions, 211 flow [2023-09-01 06:57:12,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=89, PETRI_TRANSITIONS=80} [2023-09-01 06:57:12,292 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, -15 predicate places. [2023-09-01 06:57:12,292 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 80 transitions, 211 flow [2023-09-01 06:57:12,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 305.85714285714283) internal successors, (2141), 7 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:12,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:12,293 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 06:57:12,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 06:57:12,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 06:57:12,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:12,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:12,501 INFO L85 PathProgramCache]: Analyzing trace with hash 106879621, now seen corresponding path program 2 times [2023-09-01 06:57:12,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:12,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231029739] [2023-09-01 06:57:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:12,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:57:12,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:57:12,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231029739] [2023-09-01 06:57:12,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231029739] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:57:12,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708260802] [2023-09-01 06:57:12,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 06:57:12,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:57:12,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:57:12,561 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:57:12,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 06:57:12,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 06:57:12,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 06:57:12,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 06:57:12,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:57:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:57:12,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:57:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:57:12,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708260802] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:57:12,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:57:12,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 06:57:12,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717380664] [2023-09-01 06:57:12,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:57:12,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:57:12,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:57:12,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:57:12,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:57:12,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 686 [2023-09-01 06:57:12,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 80 transitions, 211 flow. Second operand has 13 states, 13 states have (on average 305.46153846153845) internal successors, (3971), 13 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:12,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:57:12,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 686 [2023-09-01 06:57:12,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:57:22,185 INFO L130 PetriNetUnfolder]: 124250/171013 cut-off events. [2023-09-01 06:57:22,185 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 06:57:22,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337619 conditions, 171013 events. 124250/171013 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 5861. Compared 1265886 event pairs, 119875 based on Foata normal form. 6/113243 useless extension candidates. Maximal degree in co-relation 337559. Up to 165349 conditions per place. [2023-09-01 06:57:22,954 INFO L137 encePairwiseOnDemand]: 683/686 looper letters, 65 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2023-09-01 06:57:22,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 86 transitions, 399 flow [2023-09-01 06:57:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 06:57:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 06:57:22,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3730 transitions. [2023-09-01 06:57:22,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45310981535471334 [2023-09-01 06:57:22,983 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3730 transitions. [2023-09-01 06:57:22,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3730 transitions. [2023-09-01 06:57:22,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:57:22,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3730 transitions. [2023-09-01 06:57:22,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 310.8333333333333) internal successors, (3730), 12 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:23,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 686.0) internal successors, (8918), 13 states have internal predecessors, (8918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:23,029 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 686.0) internal successors, (8918), 13 states have internal predecessors, (8918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:23,030 INFO L175 Difference]: Start difference. First operand has 89 places, 80 transitions, 211 flow. Second operand 12 states and 3730 transitions. [2023-09-01 06:57:23,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 86 transitions, 399 flow [2023-09-01 06:57:23,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 86 transitions, 385 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 06:57:23,033 INFO L231 Difference]: Finished difference. Result has 105 places, 86 transitions, 281 flow [2023-09-01 06:57:23,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=281, PETRI_PLACES=105, PETRI_TRANSITIONS=86} [2023-09-01 06:57:23,041 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2023-09-01 06:57:23,041 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 86 transitions, 281 flow [2023-09-01 06:57:23,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 305.46153846153845) internal successors, (3971), 13 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:23,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:23,043 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 06:57:23,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 06:57:23,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:57:23,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:23,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:23,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1111306565, now seen corresponding path program 3 times [2023-09-01 06:57:23,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:23,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633504873] [2023-09-01 06:57:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:23,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:57:23,287 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:57:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:57:23,326 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:57:23,328 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:57:23,328 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:57:23,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 06:57:23,328 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 06:57:23,330 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:57:23,330 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:57:23,330 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 06:57:23,362 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 06:57:23,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 447 transitions, 938 flow [2023-09-01 06:57:23,550 INFO L130 PetriNetUnfolder]: 157/1021 cut-off events. [2023-09-01 06:57:23,551 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 06:57:23,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1076 conditions, 1021 events. 157/1021 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5009 event pairs, 6 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 732. Up to 32 conditions per place. [2023-09-01 06:57:23,575 INFO L82 GeneralOperation]: Start removeDead. Operand has 383 places, 447 transitions, 938 flow [2023-09-01 06:57:23,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 381 places, 445 transitions, 934 flow [2023-09-01 06:57:23,582 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:57:23,582 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 381 places, 445 transitions, 934 flow [2023-09-01 06:57:23,582 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 381 places, 445 transitions, 934 flow [2023-09-01 06:57:23,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 381 places, 445 transitions, 934 flow [2023-09-01 06:57:23,718 INFO L130 PetriNetUnfolder]: 157/1019 cut-off events. [2023-09-01 06:57:23,719 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 06:57:23,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 1019 events. 157/1019 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5018 event pairs, 6 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 730. Up to 32 conditions per place. [2023-09-01 06:57:23,814 INFO L119 LiptonReduction]: Number of co-enabled transitions 127200 [2023-09-01 06:57:28,152 INFO L134 LiptonReduction]: Checked pairs total: 236773 [2023-09-01 06:57:28,152 INFO L136 LiptonReduction]: Total number of compositions: 384 [2023-09-01 06:57:28,153 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:57:28,154 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;@9ef7bb8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:57:28,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:57:28,168 INFO L130 PetriNetUnfolder]: 84/287 cut-off events. [2023-09-01 06:57:28,168 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 06:57:28,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:28,169 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:57:28,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:28,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:28,169 INFO L85 PathProgramCache]: Analyzing trace with hash -152640275, now seen corresponding path program 1 times [2023-09-01 06:57:28,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:28,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169098242] [2023-09-01 06:57:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:28,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-09-01 06:57:28,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:57:28,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169098242] [2023-09-01 06:57:28,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169098242] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:57:28,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:57:28,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:57:28,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257223014] [2023-09-01 06:57:28,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:57:28,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:57:28,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:57:28,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:57:28,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:57:28,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 831 [2023-09-01 06:57:28,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 179 transitions, 402 flow. Second operand has 3 states, 3 states have (on average 369.6666666666667) internal successors, (1109), 3 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:28,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:57:28,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 831 [2023-09-01 06:57:28,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand