./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 07:06:34,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 07:06:34,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 07:06:34,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 07:06:34,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 07:06:34,369 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 07:06:34,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 07:06:34,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 07:06:34,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 07:06:34,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 07:06:34,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 07:06:34,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 07:06:34,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 07:06:34,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 07:06:34,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 07:06:34,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 07:06:34,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 07:06:34,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 07:06:34,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 07:06:34,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 07:06:34,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 07:06:34,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 07:06:34,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 07:06:34,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 07:06:34,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 07:06:34,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 07:06:34,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 07:06:34,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 07:06:34,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 07:06:34,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 07:06:34,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 07:06:34,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 07:06:34,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 07:06:34,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 07:06:34,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 07:06:34,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 07:06:34,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 07:06:34,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 07:06:34,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 07:06:34,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 07:06:34,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 07:06:34,414 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 07:06:34,441 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 07:06:34,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 07:06:34,443 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 07:06:34,443 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 07:06:34,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 07:06:34,444 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 07:06:34,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 07:06:34,445 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 07:06:34,445 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 07:06:34,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 07:06:34,446 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 07:06:34,446 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 07:06:34,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 07:06:34,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 07:06:34,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 07:06:34,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 07:06:34,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 07:06:34,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 07:06:34,447 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 07:06:34,447 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 07:06:34,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 07:06:34,447 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 07:06:34,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 07:06:34,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 07:06:34,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 07:06:34,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 07:06:34,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:06:34,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 07:06:34,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 07:06:34,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 07:06:34,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 07:06:34,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 07:06:34,449 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 07:06:34,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 07:06:34,449 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 07:06:34,450 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 07:06:34,450 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 07:06:34,450 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 07:06:34,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 07:06:34,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 07:06:34,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 07:06:34,781 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 07:06:34,782 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 07:06:34,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2023-09-01 07:06:35,840 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 07:06:36,037 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 07:06:36,038 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2023-09-01 07:06:36,051 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19774ccba/c6305576fbc541f4bb8e5b1551133af8/FLAGc54973586 [2023-09-01 07:06:36,386 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19774ccba/c6305576fbc541f4bb8e5b1551133af8 [2023-09-01 07:06:36,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 07:06:36,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 07:06:36,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 07:06:36,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 07:06:36,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 07:06:36,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:06:36" (1/1) ... [2023-09-01 07:06:36,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1882f4a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:36, skipping insertion in model container [2023-09-01 07:06:36,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:06:36" (1/1) ... [2023-09-01 07:06:36,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 07:06:36,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 07:06:36,808 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_91-arrayloop2_racefree.i[47038,47051] [2023-09-01 07:06:36,814 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:36,814 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:36,815 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:36,815 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:36,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:06:36,861 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 07:06:36,896 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_91-arrayloop2_racefree.i[47038,47051] [2023-09-01 07:06:36,911 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:36,912 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:36,913 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:36,913 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:36,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:06:36,985 INFO L208 MainTranslator]: Completed translation [2023-09-01 07:06:36,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:36 WrapperNode [2023-09-01 07:06:36,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 07:06:36,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 07:06:36,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 07:06:36,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 07:06:36,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:36" (1/1) ... [2023-09-01 07:06:37,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:36" (1/1) ... [2023-09-01 07:06:37,056 INFO L138 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 200 [2023-09-01 07:06:37,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 07:06:37,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 07:06:37,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 07:06:37,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 07:06:37,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:36" (1/1) ... [2023-09-01 07:06:37,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:36" (1/1) ... [2023-09-01 07:06:37,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:36" (1/1) ... [2023-09-01 07:06:37,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:36" (1/1) ... [2023-09-01 07:06:37,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:36" (1/1) ... [2023-09-01 07:06:37,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:36" (1/1) ... [2023-09-01 07:06:37,105 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:36" (1/1) ... [2023-09-01 07:06:37,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:36" (1/1) ... [2023-09-01 07:06:37,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 07:06:37,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 07:06:37,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 07:06:37,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 07:06:37,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:36" (1/1) ... [2023-09-01 07:06:37,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:06:37,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:06:37,158 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 07:06:37,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 07:06:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 07:06:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 07:06:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 07:06:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 07:06:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 07:06:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 07:06:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 07:06:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 07:06:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 07:06:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 07:06:37,203 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 07:06:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 07:06:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 07:06:37,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 07:06:37,205 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 07:06:37,376 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 07:06:37,378 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 07:06:37,713 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 07:06:37,720 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 07:06:37,722 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-09-01 07:06:37,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:06:37 BoogieIcfgContainer [2023-09-01 07:06:37,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 07:06:37,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 07:06:37,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 07:06:37,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 07:06:37,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 07:06:36" (1/3) ... [2023-09-01 07:06:37,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b34fe25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:06:37, skipping insertion in model container [2023-09-01 07:06:37,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:36" (2/3) ... [2023-09-01 07:06:37,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b34fe25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:06:37, skipping insertion in model container [2023-09-01 07:06:37,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:06:37" (3/3) ... [2023-09-01 07:06:37,732 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_91-arrayloop2_racefree.i [2023-09-01 07:06:37,738 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 07:06:37,745 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 07:06:37,746 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-09-01 07:06:37,746 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 07:06:37,835 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 07:06:37,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 215 transitions, 438 flow [2023-09-01 07:06:37,938 INFO L130 PetriNetUnfolder]: 26/231 cut-off events. [2023-09-01 07:06:37,939 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-09-01 07:06:37,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 231 events. 26/231 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 660 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 123. Up to 4 conditions per place. [2023-09-01 07:06:37,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 215 transitions, 438 flow [2023-09-01 07:06:37,953 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 200 transitions, 405 flow [2023-09-01 07:06:37,956 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 07:06:37,966 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 200 transitions, 405 flow [2023-09-01 07:06:37,969 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 200 transitions, 405 flow [2023-09-01 07:06:37,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 200 transitions, 405 flow [2023-09-01 07:06:38,007 INFO L130 PetriNetUnfolder]: 25/216 cut-off events. [2023-09-01 07:06:38,008 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:06:38,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 216 events. 25/216 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 537 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 123. Up to 4 conditions per place. [2023-09-01 07:06:38,013 INFO L119 LiptonReduction]: Number of co-enabled transitions 5096 [2023-09-01 07:06:57,683 WARN L222 SmtUtils]: Spent 13.55s 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 07:07:03,451 WARN L222 SmtUtils]: Spent 5.76s 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 07:07:13,741 WARN L222 SmtUtils]: Spent 10.29s on a formula simplification. DAG size of input: 190 DAG size of output: 188 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 07:07:18,386 INFO L134 LiptonReduction]: Checked pairs total: 5022 [2023-09-01 07:07:18,386 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-09-01 07:07:18,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 07:07:18,409 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;@25318f25, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 07:07:18,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 07:07:18,417 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2023-09-01 07:07:18,417 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:07:18,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:07:18,418 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 07:07:18,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:07:18,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:07:18,422 INFO L85 PathProgramCache]: Analyzing trace with hash 965528288, now seen corresponding path program 1 times [2023-09-01 07:07:18,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:07:18,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836777235] [2023-09-01 07:07:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:07:18,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:07:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:07:18,601 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 07:07:18,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:07:18,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836777235] [2023-09-01 07:07:18,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836777235] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:07:18,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:07:18,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 07:07:18,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143956292] [2023-09-01 07:07:18,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:07:18,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:07:18,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:07:18,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:07:18,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:07:18,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 413 [2023-09-01 07:07:18,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 43 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 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 07:07:18,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:07:18,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 413 [2023-09-01 07:07:18,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:07:18,809 INFO L130 PetriNetUnfolder]: 101/223 cut-off events. [2023-09-01 07:07:18,809 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:07:18,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 223 events. 101/223 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 807 event pairs, 80 based on Foata normal form. 12/132 useless extension candidates. Maximal degree in co-relation 404. Up to 202 conditions per place. [2023-09-01 07:07:18,811 INFO L137 encePairwiseOnDemand]: 400/413 looper letters, 30 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-09-01 07:07:18,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 36 transitions, 141 flow [2023-09-01 07:07:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:07:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:07:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2023-09-01 07:07:18,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48991121872477805 [2023-09-01 07:07:18,822 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2023-09-01 07:07:18,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2023-09-01 07:07:18,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:07:18,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2023-09-01 07:07:18,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 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 07:07:18,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 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 07:07:18,835 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 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 07:07:18,836 INFO L175 Difference]: Start difference. First operand has 32 places, 43 transitions, 91 flow. Second operand 3 states and 607 transitions. [2023-09-01 07:07:18,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 36 transitions, 141 flow [2023-09-01 07:07:18,838 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 07:07:18,840 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 83 flow [2023-09-01 07:07:18,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, 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 07:07:18,844 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-09-01 07:07:18,844 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 83 flow [2023-09-01 07:07:18,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 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 07:07:18,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:07:18,845 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:07:18,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 07:07:18,846 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:07:18,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:07:18,850 INFO L85 PathProgramCache]: Analyzing trace with hash -927442554, now seen corresponding path program 1 times [2023-09-01 07:07:18,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:07:18,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794467639] [2023-09-01 07:07:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:07:18,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:07:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:07:18,935 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 07:07:18,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:07:18,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794467639] [2023-09-01 07:07:18,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794467639] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:07:18,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:07:18,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 07:07:18,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132565608] [2023-09-01 07:07:18,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:07:18,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:07:18,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:07:18,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:07:18,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:07:18,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 413 [2023-09-01 07:07:18,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 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 07:07:18,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:07:18,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 413 [2023-09-01 07:07:18,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:07:19,137 INFO L130 PetriNetUnfolder]: 101/225 cut-off events. [2023-09-01 07:07:19,137 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:07:19,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 225 events. 101/225 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 810 event pairs, 80 based on Foata normal form. 2/127 useless extension candidates. Maximal degree in co-relation 426. Up to 205 conditions per place. [2023-09-01 07:07:19,139 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 29 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-09-01 07:07:19,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 147 flow [2023-09-01 07:07:19,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:07:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:07:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-09-01 07:07:19,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480225988700565 [2023-09-01 07:07:19,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-09-01 07:07:19,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-09-01 07:07:19,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:07:19,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-09-01 07:07:19,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 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 07:07:19,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 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 07:07:19,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 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 07:07:19,150 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 83 flow. Second operand 3 states and 595 transitions. [2023-09-01 07:07:19,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 147 flow [2023-09-01 07:07:19,151 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 07:07:19,152 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 95 flow [2023-09-01 07:07:19,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, 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 07:07:19,153 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-09-01 07:07:19,153 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 95 flow [2023-09-01 07:07:19,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 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 07:07:19,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:07:19,154 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:07:19,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 07:07:19,154 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:07:19,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:07:19,155 INFO L85 PathProgramCache]: Analyzing trace with hash -348958989, now seen corresponding path program 1 times [2023-09-01 07:07:19,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:07:19,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470968845] [2023-09-01 07:07:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:07:19,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:07:19,206 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:07:19,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261376140] [2023-09-01 07:07:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:07:19,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:07:19,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:07:19,225 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 07:07:19,226 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 07:07:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:07:19,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 07:07:19,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:07:19,446 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 07:07:19,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:07:19,468 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 07:07:19,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:07:19,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470968845] [2023-09-01 07:07:19,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:07:19,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261376140] [2023-09-01 07:07:19,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261376140] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:07:19,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:07:19,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-09-01 07:07:19,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109371912] [2023-09-01 07:07:19,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:07:19,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 07:07:19,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:07:19,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 07:07:19,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 07:07:19,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 413 [2023-09-01 07:07:19,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 95 flow. Second operand has 6 states, 6 states have (on average 190.83333333333334) internal successors, (1145), 6 states have internal predecessors, (1145), 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 07:07:19,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:07:19,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 413 [2023-09-01 07:07:19,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:07:19,884 INFO L130 PetriNetUnfolder]: 101/231 cut-off events. [2023-09-01 07:07:19,884 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 07:07:19,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 231 events. 101/231 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 820 event pairs, 80 based on Foata normal form. 6/137 useless extension candidates. Maximal degree in co-relation 433. Up to 205 conditions per place. [2023-09-01 07:07:19,885 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 29 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2023-09-01 07:07:19,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 175 flow [2023-09-01 07:07:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 07:07:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 07:07:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1170 transitions. [2023-09-01 07:07:19,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4721549636803874 [2023-09-01 07:07:19,899 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1170 transitions. [2023-09-01 07:07:19,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1170 transitions. [2023-09-01 07:07:19,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:07:19,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1170 transitions. [2023-09-01 07:07:19,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 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 07:07:19,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 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 07:07:19,905 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 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 07:07:19,906 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 95 flow. Second operand 6 states and 1170 transitions. [2023-09-01 07:07:19,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 175 flow [2023-09-01 07:07:19,906 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 07:07:19,907 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 133 flow [2023-09-01 07:07:19,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, 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 07:07:19,907 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 11 predicate places. [2023-09-01 07:07:19,908 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 133 flow [2023-09-01 07:07:19,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.83333333333334) internal successors, (1145), 6 states have internal predecessors, (1145), 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 07:07:19,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:07:19,908 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:07:19,931 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 07:07:20,109 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 07:07:20,109 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:07:20,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:07:20,110 INFO L85 PathProgramCache]: Analyzing trace with hash 176213190, now seen corresponding path program 2 times [2023-09-01 07:07:20,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:07:20,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184100057] [2023-09-01 07:07:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:07:20,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:07:20,184 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:07:20,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124035903] [2023-09-01 07:07:20,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 07:07:20,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:07:20,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:07:20,189 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 07:07:20,192 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 07:07:20,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 07:07:20,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:07:20,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 07:07:20,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:07:20,475 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 07:07:20,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:07:20,517 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 07:07:20,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:07:20,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184100057] [2023-09-01 07:07:20,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:07:20,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124035903] [2023-09-01 07:07:20,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124035903] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:07:20,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:07:20,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-09-01 07:07:20,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104634046] [2023-09-01 07:07:20,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:07:20,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 07:07:20,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:07:20,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 07:07:20,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-09-01 07:07:20,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 413 [2023-09-01 07:07:20,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 133 flow. Second operand has 12 states, 12 states have (on average 190.41666666666666) internal successors, (2285), 12 states have internal predecessors, (2285), 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 07:07:20,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:07:20,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 413 [2023-09-01 07:07:20,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:07:21,228 INFO L130 PetriNetUnfolder]: 101/243 cut-off events. [2023-09-01 07:07:21,229 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-09-01 07:07:21,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 243 events. 101/243 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 873 event pairs, 80 based on Foata normal form. 12/155 useless extension candidates. Maximal degree in co-relation 429. Up to 205 conditions per place. [2023-09-01 07:07:21,230 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 29 selfloop transitions, 11 changer transitions 0/44 dead transitions. [2023-09-01 07:07:21,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 44 transitions, 249 flow [2023-09-01 07:07:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 07:07:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 07:07:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2313 transitions. [2023-09-01 07:07:21,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46670702179176754 [2023-09-01 07:07:21,235 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2313 transitions. [2023-09-01 07:07:21,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2313 transitions. [2023-09-01 07:07:21,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:07:21,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2313 transitions. [2023-09-01 07:07:21,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 192.75) internal successors, (2313), 12 states have internal predecessors, (2313), 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 07:07:21,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 413.0) internal successors, (5369), 13 states have internal predecessors, (5369), 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 07:07:21,250 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 413.0) internal successors, (5369), 13 states have internal predecessors, (5369), 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 07:07:21,250 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 133 flow. Second operand 12 states and 2313 transitions. [2023-09-01 07:07:21,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 44 transitions, 249 flow [2023-09-01 07:07:21,253 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 07:07:21,255 INFO L231 Difference]: Finished difference. Result has 59 places, 44 transitions, 215 flow [2023-09-01 07:07:21,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, 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 07:07:21,256 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 27 predicate places. [2023-09-01 07:07:21,256 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 44 transitions, 215 flow [2023-09-01 07:07:21,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 190.41666666666666) internal successors, (2285), 12 states have internal predecessors, (2285), 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 07:07:21,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:07:21,257 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:07:21,272 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 07:07:21,464 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 07:07:21,465 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:07:21,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:07:21,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2072292774, now seen corresponding path program 3 times [2023-09-01 07:07:21,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:07:21,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967731736] [2023-09-01 07:07:21,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:07:21,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:07:21,562 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:07:21,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457622357] [2023-09-01 07:07:21,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 07:07:21,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:07:21,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:07:21,565 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 07:07:21,615 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 07:07:21,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 07:07:21,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:07:21,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 07:07:21,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:07:21,968 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 07:07:21,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:07:22,003 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 07:07:22,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:07:22,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967731736] [2023-09-01 07:07:22,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:07:22,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457622357] [2023-09-01 07:07:22,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457622357] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:07:22,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:07:22,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-09-01 07:07:22,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815019024] [2023-09-01 07:07:22,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:07:22,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 07:07:22,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:07:22,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 07:07:22,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 07:07:22,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 413 [2023-09-01 07:07:22,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 44 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 191.16666666666666) internal successors, (1147), 6 states have internal predecessors, (1147), 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 07:07:22,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:07:22,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 413 [2023-09-01 07:07:22,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:07:22,307 INFO L130 PetriNetUnfolder]: 103/270 cut-off events. [2023-09-01 07:07:22,307 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-09-01 07:07:22,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 270 events. 103/270 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 797 event pairs, 80 based on Foata normal form. 3/173 useless extension candidates. Maximal degree in co-relation 430. Up to 199 conditions per place. [2023-09-01 07:07:22,308 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 73 selfloop transitions, 6 changer transitions 0/83 dead transitions. [2023-09-01 07:07:22,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 722 flow [2023-09-01 07:07:22,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 07:07:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 07:07:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1176 transitions. [2023-09-01 07:07:22,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745762711864407 [2023-09-01 07:07:22,317 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1176 transitions. [2023-09-01 07:07:22,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1176 transitions. [2023-09-01 07:07:22,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:07:22,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1176 transitions. [2023-09-01 07:07:22,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 196.0) internal successors, (1176), 6 states have internal predecessors, (1176), 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 07:07:22,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 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 07:07:22,323 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 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 07:07:22,323 INFO L175 Difference]: Start difference. First operand has 59 places, 44 transitions, 215 flow. Second operand 6 states and 1176 transitions. [2023-09-01 07:07:22,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 722 flow [2023-09-01 07:07:22,326 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 07:07:22,327 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 250 flow [2023-09-01 07:07:22,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, 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 07:07:22,327 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 31 predicate places. [2023-09-01 07:07:22,327 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 250 flow [2023-09-01 07:07:22,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 191.16666666666666) internal successors, (1147), 6 states have internal predecessors, (1147), 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 07:07:22,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:07:22,328 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2023-09-01 07:07:22,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 07:07:22,533 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 07:07:22,534 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:07:22,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:07:22,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1163558904, now seen corresponding path program 4 times [2023-09-01 07:07:22,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:07:22,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277014915] [2023-09-01 07:07:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:07:22,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:07:22,913 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:07:22,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952197453] [2023-09-01 07:07:22,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 07:07:22,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:07:22,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:07:22,915 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 07:07:22,931 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 07:07:25,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 07:07:25,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:07:25,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 9635 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 07:07:25,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:07:25,248 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 07:07:25,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:07:25,437 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 07:07:25,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:07:25,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277014915] [2023-09-01 07:07:25,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:07:25,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952197453] [2023-09-01 07:07:25,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952197453] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:07:25,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:07:25,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-09-01 07:07:25,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156978982] [2023-09-01 07:07:25,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:07:25,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 07:07:25,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:07:25,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 07:07:25,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-09-01 07:07:25,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 413 [2023-09-01 07:07:25,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 250 flow. Second operand has 24 states, 24 states have (on average 190.33333333333334) internal successors, (4568), 24 states have internal predecessors, (4568), 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 07:07:25,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:07:25,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 413 [2023-09-01 07:07:25,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:07:26,654 INFO L130 PetriNetUnfolder]: 103/318 cut-off events. [2023-09-01 07:07:26,655 INFO L131 PetriNetUnfolder]: For 3489/3489 co-relation queries the response was YES. [2023-09-01 07:07:26,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 318 events. 103/318 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 797 event pairs, 80 based on Foata normal form. 48/266 useless extension candidates. Maximal degree in co-relation 435. Up to 211 conditions per place. [2023-09-01 07:07:26,656 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 31 selfloop transitions, 24 changer transitions 0/59 dead transitions. [2023-09-01 07:07:26,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 59 transitions, 432 flow [2023-09-01 07:07:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 07:07:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 07:07:26,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4599 transitions. [2023-09-01 07:07:26,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639830508474576 [2023-09-01 07:07:26,666 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4599 transitions. [2023-09-01 07:07:26,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4599 transitions. [2023-09-01 07:07:26,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:07:26,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4599 transitions. [2023-09-01 07:07:26,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 191.625) internal successors, (4599), 24 states have internal predecessors, (4599), 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 07:07:26,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 413.0) internal successors, (10325), 25 states have internal predecessors, (10325), 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 07:07:26,692 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 413.0) internal successors, (10325), 25 states have internal predecessors, (10325), 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 07:07:26,692 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 250 flow. Second operand 24 states and 4599 transitions. [2023-09-01 07:07:26,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 59 transitions, 432 flow [2023-09-01 07:07:26,695 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 07:07:26,697 INFO L231 Difference]: Finished difference. Result has 97 places, 59 transitions, 484 flow [2023-09-01 07:07:26,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, 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 07:07:26,699 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 65 predicate places. [2023-09-01 07:07:26,699 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 59 transitions, 484 flow [2023-09-01 07:07:26,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 190.33333333333334) internal successors, (4568), 24 states have internal predecessors, (4568), 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 07:07:26,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:07:26,701 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2023-09-01 07:07:26,737 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 07:07:26,937 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 07:07:26,937 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:07:26,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:07:26,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1711493368, now seen corresponding path program 5 times [2023-09-01 07:07:26,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:07:26,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715013143] [2023-09-01 07:07:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:07:26,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:07:27,700 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:07:27,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522799670] [2023-09-01 07:07:27,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 07:07:27,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:07:27,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:07:27,701 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 07:07:27,703 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