./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_92-evilcollapse_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_92-evilcollapse_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 07:07:41,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 07:07:41,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 07:07:41,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 07:07:41,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 07:07:41,103 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 07:07:41,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 07:07:41,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 07:07:41,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 07:07:41,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 07:07:41,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 07:07:41,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 07:07:41,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 07:07:41,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 07:07:41,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 07:07:41,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 07:07:41,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 07:07:41,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 07:07:41,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 07:07:41,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 07:07:41,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 07:07:41,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 07:07:41,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 07:07:41,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 07:07:41,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 07:07:41,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 07:07:41,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 07:07:41,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 07:07:41,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 07:07:41,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 07:07:41,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 07:07:41,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 07:07:41,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 07:07:41,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 07:07:41,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 07:07:41,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 07:07:41,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 07:07:41,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 07:07:41,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 07:07:41,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 07:07:41,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 07:07:41,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 07:07:41,203 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 07:07:41,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 07:07:41,205 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 07:07:41,205 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 07:07:41,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 07:07:41,206 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 07:07:41,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 07:07:41,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 07:07:41,207 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 07:07:41,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 07:07:41,208 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 07:07:41,208 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 07:07:41,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 07:07:41,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 07:07:41,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 07:07:41,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 07:07:41,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 07:07:41,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 07:07:41,209 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 07:07:41,210 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 07:07:41,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 07:07:41,210 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 07:07:41,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 07:07:41,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 07:07:41,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 07:07:41,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 07:07:41,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:07:41,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 07:07:41,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 07:07:41,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 07:07:41,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 07:07:41,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 07:07:41,212 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 07:07:41,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 07:07:41,213 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 07:07:41,213 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 07:07:41,213 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 07:07:41,213 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 07:07:41,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 07:07:41,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 07:07:41,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 07:07:41,581 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 07:07:41,582 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 07:07:41,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2023-09-01 07:07:42,917 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 07:07:43,215 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 07:07:43,216 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2023-09-01 07:07:43,235 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa2cd0b58/98d76febfb7444a0b250027fc74f960d/FLAG8b5cc37c3 [2023-09-01 07:07:43,257 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa2cd0b58/98d76febfb7444a0b250027fc74f960d [2023-09-01 07:07:43,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 07:07:43,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 07:07:43,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 07:07:43,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 07:07:43,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 07:07:43,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:07:43" (1/1) ... [2023-09-01 07:07:43,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b852dbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:07:43, skipping insertion in model container [2023-09-01 07:07:43,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:07:43" (1/1) ... [2023-09-01 07:07:43,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 07:07:43,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 07:07:43,750 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_92-evilcollapse_racing.i[47038,47051] [2023-09-01 07:07:43,762 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:07:43,763 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:07:43,763 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:07:43,764 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:07:43,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:07:43,818 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 07:07:43,859 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_92-evilcollapse_racing.i[47038,47051] [2023-09-01 07:07:43,878 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:07:43,878 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:07:43,878 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:07:43,879 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:07:43,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:07:43,936 INFO L208 MainTranslator]: Completed translation [2023-09-01 07:07:43,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:07:43 WrapperNode [2023-09-01 07:07:43,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 07:07:43,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 07:07:43,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 07:07:43,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 07:07:43,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:07:43" (1/1) ... [2023-09-01 07:07:43,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:07:43" (1/1) ... [2023-09-01 07:07:43,986 INFO L138 Inliner]: procedures = 278, calls = 51, calls flagged for inlining = 11, calls inlined = 12, statements flattened = 241 [2023-09-01 07:07:43,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 07:07:43,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 07:07:43,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 07:07:43,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 07:07:43,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:07:43" (1/1) ... [2023-09-01 07:07:43,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:07:43" (1/1) ... [2023-09-01 07:07:44,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:07:43" (1/1) ... [2023-09-01 07:07:44,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:07:43" (1/1) ... [2023-09-01 07:07:44,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:07:43" (1/1) ... [2023-09-01 07:07:44,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:07:43" (1/1) ... [2023-09-01 07:07:44,021 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:07:43" (1/1) ... [2023-09-01 07:07:44,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:07:43" (1/1) ... [2023-09-01 07:07:44,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 07:07:44,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 07:07:44,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 07:07:44,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 07:07:44,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:07:43" (1/1) ... [2023-09-01 07:07:44,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:07:44,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:07:44,057 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 07:07:44,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 07:07:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 07:07:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 07:07:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 07:07:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 07:07:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 07:07:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 07:07:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 07:07:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 07:07:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 07:07:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 07:07:44,081 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 07:07:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 07:07:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 07:07:44,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 07:07:44,082 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 07:07:44,246 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 07:07:44,259 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 07:07:44,616 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 07:07:44,628 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 07:07:44,631 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-09-01 07:07:44,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:07:44 BoogieIcfgContainer [2023-09-01 07:07:44,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 07:07:44,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 07:07:44,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 07:07:44,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 07:07:44,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 07:07:43" (1/3) ... [2023-09-01 07:07:44,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a869d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:07:44, skipping insertion in model container [2023-09-01 07:07:44,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:07:43" (2/3) ... [2023-09-01 07:07:44,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a869d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:07:44, skipping insertion in model container [2023-09-01 07:07:44,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:07:44" (3/3) ... [2023-09-01 07:07:44,641 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing.i [2023-09-01 07:07:44,646 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 07:07:44,652 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 07:07:44,652 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-09-01 07:07:44,653 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 07:07:44,749 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 07:07:44,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 264 transitions, 536 flow [2023-09-01 07:07:44,926 INFO L130 PetriNetUnfolder]: 28/280 cut-off events. [2023-09-01 07:07:44,927 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-09-01 07:07:44,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 280 events. 28/280 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 522 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 146. Up to 4 conditions per place. [2023-09-01 07:07:44,935 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 264 transitions, 536 flow [2023-09-01 07:07:44,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 249 transitions, 503 flow [2023-09-01 07:07:44,946 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 07:07:44,954 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 227 places, 249 transitions, 503 flow [2023-09-01 07:07:44,956 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 227 places, 249 transitions, 503 flow [2023-09-01 07:07:44,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 249 transitions, 503 flow [2023-09-01 07:07:44,997 INFO L130 PetriNetUnfolder]: 27/265 cut-off events. [2023-09-01 07:07:44,997 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:07:45,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 265 events. 27/265 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 415 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 140. Up to 4 conditions per place. [2023-09-01 07:07:45,006 INFO L119 LiptonReduction]: Number of co-enabled transitions 5096 [2023-09-01 07:08:11,494 WARN L222 SmtUtils]: Spent 16.64s on a formula simplification. DAG size of input: 188 DAG size of output: 187 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 07:08:17,737 WARN L222 SmtUtils]: Spent 6.24s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 07:08:32,985 WARN L222 SmtUtils]: Spent 15.25s on a formula simplification. DAG size of input: 188 DAG size of output: 187 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 07:08:37,855 INFO L134 LiptonReduction]: Checked pairs total: 5248 [2023-09-01 07:08:37,855 INFO L136 LiptonReduction]: Total number of compositions: 260 [2023-09-01 07:08:37,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 07:08:37,872 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;@50a5fd77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 07:08:37,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 07:08:37,877 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2023-09-01 07:08:37,877 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:08:37,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:08:37,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 07:08:37,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:08:37,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:08:37,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1144860147, now seen corresponding path program 1 times [2023-09-01 07:08:37,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:08:37,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955347211] [2023-09-01 07:08:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:08:37,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:08:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:08:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:08:38,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:08:38,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955347211] [2023-09-01 07:08:38,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955347211] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:08:38,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:08:38,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 07:08:38,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810295526] [2023-09-01 07:08:38,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:08:38,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:08:38,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:08:38,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:08:38,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:08:38,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 524 [2023-09-01 07:08:38,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 43 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:38,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:08:38,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 524 [2023-09-01 07:08:38,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:08:38,404 INFO L130 PetriNetUnfolder]: 101/224 cut-off events. [2023-09-01 07:08:38,404 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:08:38,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 224 events. 101/224 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 817 event pairs, 80 based on Foata normal form. 12/133 useless extension candidates. Maximal degree in co-relation 404. Up to 202 conditions per place. [2023-09-01 07:08:38,407 INFO L137 encePairwiseOnDemand]: 511/524 looper letters, 30 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-09-01 07:08:38,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 36 transitions, 141 flow [2023-09-01 07:08:38,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:08:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:08:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 748 transitions. [2023-09-01 07:08:38,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4758269720101781 [2023-09-01 07:08:38,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 748 transitions. [2023-09-01 07:08:38,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 748 transitions. [2023-09-01 07:08:38,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:08:38,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 748 transitions. [2023-09-01 07:08:38,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:38,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 524.0) internal successors, (2096), 4 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:38,444 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 524.0) internal successors, (2096), 4 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:38,448 INFO L175 Difference]: Start difference. First operand has 32 places, 43 transitions, 91 flow. Second operand 3 states and 748 transitions. [2023-09-01 07:08:38,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 36 transitions, 141 flow [2023-09-01 07:08:38,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 36 transitions, 141 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 07:08:38,453 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 83 flow [2023-09-01 07:08:38,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=524, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-09-01 07:08:38,459 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-09-01 07:08:38,459 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 83 flow [2023-09-01 07:08:38,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:38,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:08:38,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:08:38,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 07:08:38,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:08:38,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:08:38,468 INFO L85 PathProgramCache]: Analyzing trace with hash 577774571, now seen corresponding path program 1 times [2023-09-01 07:08:38,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:08:38,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967613224] [2023-09-01 07:08:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:08:38,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:08:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:08:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:08:38,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:08:38,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967613224] [2023-09-01 07:08:38,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967613224] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:08:38,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:08:38,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 07:08:38,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826218748] [2023-09-01 07:08:38,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:08:38,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:08:38,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:08:38,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:08:38,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:08:38,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 524 [2023-09-01 07:08:38,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:38,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:08:38,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 524 [2023-09-01 07:08:38,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:08:38,795 INFO L130 PetriNetUnfolder]: 101/226 cut-off events. [2023-09-01 07:08:38,795 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:08:38,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 226 events. 101/226 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 820 event pairs, 80 based on Foata normal form. 2/128 useless extension candidates. Maximal degree in co-relation 428. Up to 205 conditions per place. [2023-09-01 07:08:38,796 INFO L137 encePairwiseOnDemand]: 521/524 looper letters, 29 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-09-01 07:08:38,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 147 flow [2023-09-01 07:08:38,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:08:38,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:08:38,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 736 transitions. [2023-09-01 07:08:38,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681933842239186 [2023-09-01 07:08:38,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 736 transitions. [2023-09-01 07:08:38,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 736 transitions. [2023-09-01 07:08:38,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:08:38,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 736 transitions. [2023-09-01 07:08:38,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:38,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 524.0) internal successors, (2096), 4 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:38,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 524.0) internal successors, (2096), 4 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:38,830 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 83 flow. Second operand 3 states and 736 transitions. [2023-09-01 07:08:38,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 147 flow [2023-09-01 07:08:38,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 145 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 07:08:38,832 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 95 flow [2023-09-01 07:08:38,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=524, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-09-01 07:08:38,833 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-09-01 07:08:38,833 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 95 flow [2023-09-01 07:08:38,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:38,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:08:38,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:08:38,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 07:08:38,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:08:38,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:08:38,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1214016277, now seen corresponding path program 1 times [2023-09-01 07:08:38,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:08:38,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264525897] [2023-09-01 07:08:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:08:38,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:08:38,896 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:08:38,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791102253] [2023-09-01 07:08:38,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:08:38,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:08:38,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:08:38,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:08:38,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 07:08:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:08:39,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 07:08:39,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:08:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:08:39,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:08:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:08:39,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:08:39,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264525897] [2023-09-01 07:08:39,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:08:39,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791102253] [2023-09-01 07:08:39,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791102253] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:08:39,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:08:39,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-09-01 07:08:39,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580319090] [2023-09-01 07:08:39,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:08:39,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 07:08:39,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:08:39,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 07:08:39,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 07:08:39,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 524 [2023-09-01 07:08:39,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 95 flow. Second operand has 6 states, 6 states have (on average 237.83333333333334) internal successors, (1427), 6 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:39,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:08:39,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 524 [2023-09-01 07:08:39,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:08:39,468 INFO L130 PetriNetUnfolder]: 101/232 cut-off events. [2023-09-01 07:08:39,469 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 07:08:39,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 232 events. 101/232 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 831 event pairs, 80 based on Foata normal form. 6/138 useless extension candidates. Maximal degree in co-relation 435. Up to 205 conditions per place. [2023-09-01 07:08:39,470 INFO L137 encePairwiseOnDemand]: 521/524 looper letters, 29 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2023-09-01 07:08:39,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 175 flow [2023-09-01 07:08:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 07:08:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 07:08:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1452 transitions. [2023-09-01 07:08:39,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4618320610687023 [2023-09-01 07:08:39,475 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1452 transitions. [2023-09-01 07:08:39,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1452 transitions. [2023-09-01 07:08:39,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:08:39,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1452 transitions. [2023-09-01 07:08:39,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:39,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 524.0) internal successors, (3668), 7 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:39,487 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 524.0) internal successors, (3668), 7 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:39,487 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 95 flow. Second operand 6 states and 1452 transitions. [2023-09-01 07:08:39,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 175 flow [2023-09-01 07:08:39,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 171 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 07:08:39,490 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 133 flow [2023-09-01 07:08:39,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=524, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-09-01 07:08:39,491 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 11 predicate places. [2023-09-01 07:08:39,491 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 133 flow [2023-09-01 07:08:39,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 237.83333333333334) internal successors, (1427), 6 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:39,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:08:39,493 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:08:39,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 07:08:39,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:08:39,702 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:08:39,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:08:39,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1591582315, now seen corresponding path program 2 times [2023-09-01 07:08:39,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:08:39,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812896294] [2023-09-01 07:08:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:08:39,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:08:39,768 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:08:39,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285518189] [2023-09-01 07:08:39,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 07:08:39,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:08:39,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:08:39,770 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:08:39,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 07:08:40,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 07:08:40,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:08:40,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 07:08:40,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:08:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:08:40,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:08:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:08:40,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:08:40,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812896294] [2023-09-01 07:08:40,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:08:40,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285518189] [2023-09-01 07:08:40,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285518189] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:08:40,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:08:40,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-09-01 07:08:40,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201746415] [2023-09-01 07:08:40,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:08:40,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 07:08:40,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:08:40,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 07:08:40,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-09-01 07:08:40,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 524 [2023-09-01 07:08:40,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 133 flow. Second operand has 12 states, 12 states have (on average 237.41666666666666) internal successors, (2849), 12 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:40,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:08:40,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 524 [2023-09-01 07:08:40,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:08:41,337 INFO L130 PetriNetUnfolder]: 101/244 cut-off events. [2023-09-01 07:08:41,338 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-09-01 07:08:41,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 244 events. 101/244 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 885 event pairs, 80 based on Foata normal form. 12/156 useless extension candidates. Maximal degree in co-relation 431. Up to 205 conditions per place. [2023-09-01 07:08:41,339 INFO L137 encePairwiseOnDemand]: 521/524 looper letters, 29 selfloop transitions, 11 changer transitions 0/44 dead transitions. [2023-09-01 07:08:41,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 44 transitions, 249 flow [2023-09-01 07:08:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 07:08:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 07:08:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2877 transitions. [2023-09-01 07:08:41,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575381679389313 [2023-09-01 07:08:41,347 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2877 transitions. [2023-09-01 07:08:41,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2877 transitions. [2023-09-01 07:08:41,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:08:41,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2877 transitions. [2023-09-01 07:08:41,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 239.75) internal successors, (2877), 12 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:41,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 524.0) internal successors, (6812), 13 states have internal predecessors, (6812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:41,366 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 524.0) internal successors, (6812), 13 states have internal predecessors, (6812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:41,367 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 133 flow. Second operand 12 states and 2877 transitions. [2023-09-01 07:08:41,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 44 transitions, 249 flow [2023-09-01 07:08:41,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 235 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 07:08:41,370 INFO L231 Difference]: Finished difference. Result has 59 places, 44 transitions, 215 flow [2023-09-01 07:08:41,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=524, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=215, PETRI_PLACES=59, PETRI_TRANSITIONS=44} [2023-09-01 07:08:41,370 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 27 predicate places. [2023-09-01 07:08:41,371 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 44 transitions, 215 flow [2023-09-01 07:08:41,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 237.41666666666666) internal successors, (2849), 12 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:41,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:08:41,372 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:08:41,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 07:08:41,579 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,SelfDestructingSolverStorable3 [2023-09-01 07:08:41,580 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:08:41,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:08:41,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1492745771, now seen corresponding path program 3 times [2023-09-01 07:08:41,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:08:41,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982545839] [2023-09-01 07:08:41,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:08:41,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:08:41,697 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:08:41,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262955731] [2023-09-01 07:08:41,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 07:08:41,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:08:41,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:08:41,699 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:08:41,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 07:08:42,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 07:08:42,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:08:42,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 07:08:42,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:08:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-09-01 07:08:42,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:08:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-09-01 07:08:42,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:08:42,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982545839] [2023-09-01 07:08:42,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:08:42,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262955731] [2023-09-01 07:08:42,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262955731] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:08:42,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:08:42,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-09-01 07:08:42,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219927092] [2023-09-01 07:08:42,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:08:42,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 07:08:42,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:08:42,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 07:08:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 07:08:42,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 524 [2023-09-01 07:08:42,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 44 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 238.16666666666666) internal successors, (1429), 6 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:42,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:08:42,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 524 [2023-09-01 07:08:42,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:08:42,566 INFO L130 PetriNetUnfolder]: 103/271 cut-off events. [2023-09-01 07:08:42,567 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-09-01 07:08:42,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 271 events. 103/271 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 808 event pairs, 80 based on Foata normal form. 3/174 useless extension candidates. Maximal degree in co-relation 432. Up to 199 conditions per place. [2023-09-01 07:08:42,568 INFO L137 encePairwiseOnDemand]: 520/524 looper letters, 73 selfloop transitions, 6 changer transitions 0/83 dead transitions. [2023-09-01 07:08:42,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 722 flow [2023-09-01 07:08:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 07:08:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 07:08:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1458 transitions. [2023-09-01 07:08:42,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4637404580152672 [2023-09-01 07:08:42,573 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1458 transitions. [2023-09-01 07:08:42,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1458 transitions. [2023-09-01 07:08:42,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:08:42,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1458 transitions. [2023-09-01 07:08:42,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:42,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 524.0) internal successors, (3668), 7 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:42,581 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 524.0) internal successors, (3668), 7 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:42,582 INFO L175 Difference]: Start difference. First operand has 59 places, 44 transitions, 215 flow. Second operand 6 states and 1458 transitions. [2023-09-01 07:08:42,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 722 flow [2023-09-01 07:08:42,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 83 transitions, 528 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-09-01 07:08:42,587 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 250 flow [2023-09-01 07:08:42,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=524, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2023-09-01 07:08:42,588 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 31 predicate places. [2023-09-01 07:08:42,588 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 250 flow [2023-09-01 07:08:42,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 238.16666666666666) internal successors, (1429), 6 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:42,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:08:42,589 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2023-09-01 07:08:42,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 07:08:42,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:08:42,796 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:08:42,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:08:42,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1736447109, now seen corresponding path program 4 times [2023-09-01 07:08:42,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:08:42,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154626610] [2023-09-01 07:08:42,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:08:42,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:08:43,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:08:43,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672934022] [2023-09-01 07:08:43,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 07:08:43,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:08:43,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:08:43,238 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:08:43,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 07:08:45,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 07:08:45,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:08:45,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 9673 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 07:08:45,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:08:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-09-01 07:08:45,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:08:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-09-01 07:08:46,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:08:46,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154626610] [2023-09-01 07:08:46,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:08:46,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672934022] [2023-09-01 07:08:46,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672934022] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:08:46,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:08:46,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-09-01 07:08:46,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699227102] [2023-09-01 07:08:46,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:08:46,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 07:08:46,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:08:46,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 07:08:46,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-09-01 07:08:46,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 524 [2023-09-01 07:08:46,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 250 flow. Second operand has 24 states, 24 states have (on average 237.33333333333334) internal successors, (5696), 24 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:46,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:08:46,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 524 [2023-09-01 07:08:46,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:08:47,415 INFO L130 PetriNetUnfolder]: 103/319 cut-off events. [2023-09-01 07:08:47,415 INFO L131 PetriNetUnfolder]: For 3489/3489 co-relation queries the response was YES. [2023-09-01 07:08:47,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 319 events. 103/319 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 808 event pairs, 80 based on Foata normal form. 48/267 useless extension candidates. Maximal degree in co-relation 437. Up to 211 conditions per place. [2023-09-01 07:08:47,417 INFO L137 encePairwiseOnDemand]: 521/524 looper letters, 31 selfloop transitions, 24 changer transitions 0/59 dead transitions. [2023-09-01 07:08:47,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 59 transitions, 432 flow [2023-09-01 07:08:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 07:08:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 07:08:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5727 transitions. [2023-09-01 07:08:47,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4553912213740458 [2023-09-01 07:08:47,429 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5727 transitions. [2023-09-01 07:08:47,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5727 transitions. [2023-09-01 07:08:47,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:08:47,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5727 transitions. [2023-09-01 07:08:47,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 238.625) internal successors, (5727), 24 states have internal predecessors, (5727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:47,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 524.0) internal successors, (13100), 25 states have internal predecessors, (13100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:47,475 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 524.0) internal successors, (13100), 25 states have internal predecessors, (13100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:47,475 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 250 flow. Second operand 24 states and 5727 transitions. [2023-09-01 07:08:47,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 59 transitions, 432 flow [2023-09-01 07:08:47,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 59 transitions, 424 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 07:08:47,480 INFO L231 Difference]: Finished difference. Result has 97 places, 59 transitions, 484 flow [2023-09-01 07:08:47,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=524, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=484, PETRI_PLACES=97, PETRI_TRANSITIONS=59} [2023-09-01 07:08:47,482 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 65 predicate places. [2023-09-01 07:08:47,482 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 59 transitions, 484 flow [2023-09-01 07:08:47,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 237.33333333333334) internal successors, (5696), 24 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:08:47,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:08:47,486 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2023-09-01 07:08:47,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 07:08:47,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:08:47,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:08:47,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:08:47,701 INFO L85 PathProgramCache]: Analyzing trace with hash 409592965, now seen corresponding path program 5 times [2023-09-01 07:08:47,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:08:47,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993158797] [2023-09-01 07:08:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:08:47,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:08:48,581 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:08:48,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959953397] [2023-09-01 07:08:48,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 07:08:48,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:08:48,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:08:48,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:08:48,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15