./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 02:07:39,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 02:07:39,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 02:07:39,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 02:07:39,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 02:07:39,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 02:07:39,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 02:07:39,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 02:07:39,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 02:07:39,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 02:07:39,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 02:07:39,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 02:07:39,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 02:07:39,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 02:07:39,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 02:07:39,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 02:07:39,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 02:07:39,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 02:07:39,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 02:07:39,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 02:07:39,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 02:07:39,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 02:07:39,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 02:07:39,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 02:07:39,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 02:07:39,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 02:07:39,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 02:07:39,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 02:07:39,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 02:07:39,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 02:07:39,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 02:07:39,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 02:07:39,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 02:07:39,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 02:07:39,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 02:07:39,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 02:07:39,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 02:07:39,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 02:07:39,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 02:07:39,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 02:07:39,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 02:07:39,436 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 02:07:39,461 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 02:07:39,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 02:07:39,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 02:07:39,462 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 02:07:39,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 02:07:39,463 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 02:07:39,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 02:07:39,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 02:07:39,464 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 02:07:39,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 02:07:39,465 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 02:07:39,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 02:07:39,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 02:07:39,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 02:07:39,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 02:07:39,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 02:07:39,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 02:07:39,466 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 02:07:39,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 02:07:39,467 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 02:07:39,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 02:07:39,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 02:07:39,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 02:07:39,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 02:07:39,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:07:39,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 02:07:39,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 02:07:39,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 02:07:39,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 02:07:39,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 02:07:39,469 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 02:07:39,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 02:07:39,469 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 02:07:39,469 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 02:07:39,470 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 02:07:39,470 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 02:07:39,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 02:07:39,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 02:07:39,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 02:07:39,806 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 02:07:39,806 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 02:07:39,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-08-31 02:07:40,918 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 02:07:41,117 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 02:07:41,117 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-08-31 02:07:41,129 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f2f440c6/47bbaa1314874bb2846cd81504a6a950/FLAG2148c4c73 [2023-08-31 02:07:41,150 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f2f440c6/47bbaa1314874bb2846cd81504a6a950 [2023-08-31 02:07:41,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 02:07:41,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 02:07:41,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 02:07:41,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 02:07:41,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 02:07:41,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:07:41" (1/1) ... [2023-08-31 02:07:41,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@228f3134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:07:41, skipping insertion in model container [2023-08-31 02:07:41,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:07:41" (1/1) ... [2023-08-31 02:07:41,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 02:07:41,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 02:07:41,404 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-08-31 02:07:41,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:07:41,437 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 02:07:41,478 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-08-31 02:07:41,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:07:41,511 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:07:41,511 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:07:41,517 INFO L208 MainTranslator]: Completed translation [2023-08-31 02:07:41,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:07:41 WrapperNode [2023-08-31 02:07:41,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 02:07:41,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 02:07:41,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 02:07:41,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 02:07:41,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:07:41" (1/1) ... [2023-08-31 02:07:41,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:07:41" (1/1) ... [2023-08-31 02:07:41,595 INFO L138 Inliner]: procedures = 29, calls = 88, calls flagged for inlining = 22, calls inlined = 32, statements flattened = 403 [2023-08-31 02:07:41,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 02:07:41,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 02:07:41,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 02:07:41,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 02:07:41,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:07:41" (1/1) ... [2023-08-31 02:07:41,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:07:41" (1/1) ... [2023-08-31 02:07:41,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:07:41" (1/1) ... [2023-08-31 02:07:41,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:07:41" (1/1) ... [2023-08-31 02:07:41,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:07:41" (1/1) ... [2023-08-31 02:07:41,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:07:41" (1/1) ... [2023-08-31 02:07:41,652 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:07:41" (1/1) ... [2023-08-31 02:07:41,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:07:41" (1/1) ... [2023-08-31 02:07:41,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 02:07:41,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 02:07:41,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 02:07:41,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 02:07:41,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:07:41" (1/1) ... [2023-08-31 02:07:41,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:07:41,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:07:41,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 02:07:41,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 02:07:41,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 02:07:41,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 02:07:41,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 02:07:41,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 02:07:41,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 02:07:41,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 02:07:41,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 02:07:41,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 02:07:41,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 02:07:41,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 02:07:41,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-31 02:07:41,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-31 02:07:41,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 02:07:41,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-31 02:07:41,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-31 02:07:41,728 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-31 02:07:41,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-31 02:07:41,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 02:07:41,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 02:07:41,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 02:07:41,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 02:07:41,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 02:07:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 02:07:41,730 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 02:07:41,860 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 02:07:41,862 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 02:07:42,469 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 02:07:42,701 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 02:07:42,701 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-31 02:07:42,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:07:42 BoogieIcfgContainer [2023-08-31 02:07:42,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 02:07:42,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 02:07:42,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 02:07:42,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 02:07:42,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 02:07:41" (1/3) ... [2023-08-31 02:07:42,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c1c9e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:07:42, skipping insertion in model container [2023-08-31 02:07:42,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:07:41" (2/3) ... [2023-08-31 02:07:42,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c1c9e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:07:42, skipping insertion in model container [2023-08-31 02:07:42,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:07:42" (3/3) ... [2023-08-31 02:07:42,712 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-2.wvr.c [2023-08-31 02:07:42,719 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 02:07:42,728 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 02:07:42,728 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 02:07:42,728 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 02:07:42,870 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-31 02:07:42,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 306 places, 310 transitions, 692 flow [2023-08-31 02:07:42,992 INFO L130 PetriNetUnfolder]: 21/266 cut-off events. [2023-08-31 02:07:42,994 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 02:07:43,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 266 events. 21/266 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 309 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 228. Up to 3 conditions per place. [2023-08-31 02:07:43,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 306 places, 310 transitions, 692 flow [2023-08-31 02:07:43,006 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 258 transitions, 564 flow [2023-08-31 02:07:43,009 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 02:07:43,017 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 258 transitions, 564 flow [2023-08-31 02:07:43,019 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 258 transitions, 564 flow [2023-08-31 02:07:43,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 258 transitions, 564 flow [2023-08-31 02:07:43,075 INFO L130 PetriNetUnfolder]: 21/258 cut-off events. [2023-08-31 02:07:43,075 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 02:07:43,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 258 events. 21/258 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 306 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 228. Up to 3 conditions per place. [2023-08-31 02:07:43,082 INFO L119 LiptonReduction]: Number of co-enabled transitions 8992 [2023-08-31 02:07:50,708 INFO L134 LiptonReduction]: Checked pairs total: 29590 [2023-08-31 02:07:50,708 INFO L136 LiptonReduction]: Total number of compositions: 237 [2023-08-31 02:07:50,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 02:07:50,725 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;@79e8a7f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 02:07:50,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-31 02:07:50,738 INFO L130 PetriNetUnfolder]: 9/60 cut-off events. [2023-08-31 02:07:50,739 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 02:07:50,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:07:50,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:07:50,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-31 02:07:50,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:07:50,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1294203465, now seen corresponding path program 1 times [2023-08-31 02:07:50,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:07:50,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204389620] [2023-08-31 02:07:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:07:50,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:07:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:07:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:07:51,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:07:51,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204389620] [2023-08-31 02:07:51,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204389620] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:07:51,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:07:51,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:07:51,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194620681] [2023-08-31 02:07:51,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:07:51,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:07:51,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:07:51,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:07:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:07:51,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 551 [2023-08-31 02:07:51,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 263.5) internal successors, (1054), 4 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:51,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:07:51,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 551 [2023-08-31 02:07:51,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:07:52,621 INFO L130 PetriNetUnfolder]: 4669/6705 cut-off events. [2023-08-31 02:07:52,621 INFO L131 PetriNetUnfolder]: For 1489/1489 co-relation queries the response was YES. [2023-08-31 02:07:52,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14639 conditions, 6705 events. 4669/6705 cut-off events. For 1489/1489 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 31411 event pairs, 3014 based on Foata normal form. 36/4933 useless extension candidates. Maximal degree in co-relation 7761. Up to 3367 conditions per place. [2023-08-31 02:07:52,657 INFO L137 encePairwiseOnDemand]: 545/551 looper letters, 38 selfloop transitions, 2 changer transitions 31/93 dead transitions. [2023-08-31 02:07:52,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 421 flow [2023-08-31 02:07:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:07:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:07:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1098 transitions. [2023-08-31 02:07:52,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981851179673321 [2023-08-31 02:07:52,674 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1098 transitions. [2023-08-31 02:07:52,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1098 transitions. [2023-08-31 02:07:52,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:07:52,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1098 transitions. [2023-08-31 02:07:52,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 274.5) internal successors, (1098), 4 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:52,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:52,706 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:52,708 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 170 flow. Second operand 4 states and 1098 transitions. [2023-08-31 02:07:52,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 421 flow [2023-08-31 02:07:52,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 93 transitions, 359 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-31 02:07:52,738 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 156 flow [2023-08-31 02:07:52,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-08-31 02:07:52,743 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-08-31 02:07:52,743 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 156 flow [2023-08-31 02:07:52,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 263.5) internal successors, (1054), 4 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:52,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:07:52,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:07:52,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 02:07:52,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-31 02:07:52,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:07:52,746 INFO L85 PathProgramCache]: Analyzing trace with hash 117533720, now seen corresponding path program 1 times [2023-08-31 02:07:52,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:07:52,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976822829] [2023-08-31 02:07:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:07:52,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:07:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:07:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:07:53,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:07:53,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976822829] [2023-08-31 02:07:53,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976822829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:07:53,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734028204] [2023-08-31 02:07:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:07:53,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:07:53,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:07:53,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:07:53,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 02:07:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:07:53,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-31 02:07:53,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:07:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:07:54,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:07:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:07:54,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734028204] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:07:54,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:07:54,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 13 [2023-08-31 02:07:54,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654347069] [2023-08-31 02:07:54,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:07:54,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:07:54,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:07:54,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:07:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-08-31 02:07:54,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 551 [2023-08-31 02:07:54,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 254.2) internal successors, (1271), 5 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:54,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:07:54,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 551 [2023-08-31 02:07:54,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:07:55,718 INFO L130 PetriNetUnfolder]: 5283/7284 cut-off events. [2023-08-31 02:07:55,719 INFO L131 PetriNetUnfolder]: For 1133/1141 co-relation queries the response was YES. [2023-08-31 02:07:55,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15431 conditions, 7284 events. 5283/7284 cut-off events. For 1133/1141 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 31914 event pairs, 2115 based on Foata normal form. 5/5876 useless extension candidates. Maximal degree in co-relation 15419. Up to 4193 conditions per place. [2023-08-31 02:07:55,764 INFO L137 encePairwiseOnDemand]: 543/551 looper letters, 81 selfloop transitions, 8 changer transitions 9/120 dead transitions. [2023-08-31 02:07:55,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 120 transitions, 504 flow [2023-08-31 02:07:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:07:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:07:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1338 transitions. [2023-08-31 02:07:55,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48566243194192377 [2023-08-31 02:07:55,769 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1338 transitions. [2023-08-31 02:07:55,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1338 transitions. [2023-08-31 02:07:55,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:07:55,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1338 transitions. [2023-08-31 02:07:55,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 267.6) internal successors, (1338), 5 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:55,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 551.0) internal successors, (3306), 6 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:55,779 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 551.0) internal successors, (3306), 6 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:55,780 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 156 flow. Second operand 5 states and 1338 transitions. [2023-08-31 02:07:55,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 120 transitions, 504 flow [2023-08-31 02:07:55,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 120 transitions, 494 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-31 02:07:55,792 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 211 flow [2023-08-31 02:07:55,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2023-08-31 02:07:55,794 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-08-31 02:07:55,794 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 211 flow [2023-08-31 02:07:55,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 254.2) internal successors, (1271), 5 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:55,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:07:55,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:07:55,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 02:07:56,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:07:56,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-31 02:07:56,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:07:56,005 INFO L85 PathProgramCache]: Analyzing trace with hash 918312716, now seen corresponding path program 2 times [2023-08-31 02:07:56,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:07:56,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823646999] [2023-08-31 02:07:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:07:56,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:07:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:07:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:07:56,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:07:56,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823646999] [2023-08-31 02:07:56,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823646999] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:07:56,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705304684] [2023-08-31 02:07:56,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:07:56,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:07:56,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:07:56,717 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:07:56,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 02:07:56,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 02:07:56,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:07:56,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 02:07:56,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:07:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:07:57,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 02:07:57,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705304684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:07:57,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 02:07:57,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-08-31 02:07:57,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173615326] [2023-08-31 02:07:57,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:07:57,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 02:07:57,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:07:57,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 02:07:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-31 02:07:57,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 551 [2023-08-31 02:07:57,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 211 flow. Second operand has 6 states, 6 states have (on average 260.1666666666667) internal successors, (1561), 6 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:57,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:07:57,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 551 [2023-08-31 02:07:57,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:07:58,585 INFO L130 PetriNetUnfolder]: 7715/10366 cut-off events. [2023-08-31 02:07:58,585 INFO L131 PetriNetUnfolder]: For 4941/4993 co-relation queries the response was YES. [2023-08-31 02:07:58,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25631 conditions, 10366 events. 7715/10366 cut-off events. For 4941/4993 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 46113 event pairs, 2067 based on Foata normal form. 31/9569 useless extension candidates. Maximal degree in co-relation 25617. Up to 3712 conditions per place. [2023-08-31 02:07:58,663 INFO L137 encePairwiseOnDemand]: 542/551 looper letters, 106 selfloop transitions, 12 changer transitions 9/149 dead transitions. [2023-08-31 02:07:58,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 149 transitions, 690 flow [2023-08-31 02:07:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:07:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:07:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1655 transitions. [2023-08-31 02:07:58,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500604960677556 [2023-08-31 02:07:58,669 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1655 transitions. [2023-08-31 02:07:58,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1655 transitions. [2023-08-31 02:07:58,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:07:58,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1655 transitions. [2023-08-31 02:07:58,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 275.8333333333333) internal successors, (1655), 6 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:58,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 551.0) internal successors, (3857), 7 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:58,682 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 551.0) internal successors, (3857), 7 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:58,682 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 211 flow. Second operand 6 states and 1655 transitions. [2023-08-31 02:07:58,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 149 transitions, 690 flow [2023-08-31 02:07:58,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 149 transitions, 670 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-31 02:07:58,706 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 267 flow [2023-08-31 02:07:58,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2023-08-31 02:07:58,707 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-08-31 02:07:58,708 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 267 flow [2023-08-31 02:07:58,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 260.1666666666667) internal successors, (1561), 6 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:58,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:07:58,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:07:58,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 02:07:58,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-31 02:07:58,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-31 02:07:58,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:07:58,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1783620550, now seen corresponding path program 1 times [2023-08-31 02:07:58,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:07:58,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753100925] [2023-08-31 02:07:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:07:58,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:07:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:07:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:07:59,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:07:59,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753100925] [2023-08-31 02:07:59,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753100925] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:07:59,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519266852] [2023-08-31 02:07:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:07:59,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:07:59,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:07:59,253 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:07:59,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 02:07:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:07:59,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 02:07:59,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:07:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:07:59,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 02:07:59,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519266852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:07:59,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 02:07:59,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-31 02:07:59,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140336547] [2023-08-31 02:07:59,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:07:59,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:07:59,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:07:59,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:07:59,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-31 02:07:59,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 551 [2023-08-31 02:07:59,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:59,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:07:59,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 551 [2023-08-31 02:07:59,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:08:01,368 INFO L130 PetriNetUnfolder]: 11863/15713 cut-off events. [2023-08-31 02:08:01,368 INFO L131 PetriNetUnfolder]: For 8889/9087 co-relation queries the response was YES. [2023-08-31 02:08:01,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39689 conditions, 15713 events. 11863/15713 cut-off events. For 8889/9087 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 72010 event pairs, 2155 based on Foata normal form. 164/14651 useless extension candidates. Maximal degree in co-relation 39666. Up to 7293 conditions per place. [2023-08-31 02:08:01,462 INFO L137 encePairwiseOnDemand]: 545/551 looper letters, 96 selfloop transitions, 11 changer transitions 2/131 dead transitions. [2023-08-31 02:08:01,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 131 transitions, 648 flow [2023-08-31 02:08:01,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:08:01,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:08:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1135 transitions. [2023-08-31 02:08:01,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51497277676951 [2023-08-31 02:08:01,465 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1135 transitions. [2023-08-31 02:08:01,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1135 transitions. [2023-08-31 02:08:01,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:08:01,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1135 transitions. [2023-08-31 02:08:01,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.75) internal successors, (1135), 4 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:01,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:01,473 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:01,473 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 267 flow. Second operand 4 states and 1135 transitions. [2023-08-31 02:08:01,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 131 transitions, 648 flow [2023-08-31 02:08:01,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 131 transitions, 635 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-31 02:08:01,517 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 301 flow [2023-08-31 02:08:01,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=301, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2023-08-31 02:08:01,518 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-08-31 02:08:01,518 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 301 flow [2023-08-31 02:08:01,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:01,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:08:01,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:08:01,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 02:08:01,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:01,726 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-31 02:08:01,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:08:01,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1944478364, now seen corresponding path program 1 times [2023-08-31 02:08:01,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:08:01,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22594553] [2023-08-31 02:08:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:01,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:08:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:02,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:08:02,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22594553] [2023-08-31 02:08:02,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22594553] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:08:02,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832199181] [2023-08-31 02:08:02,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:02,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:02,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:08:02,028 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) [2023-08-31 02:08:02,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 02:08:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:02,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 02:08:02,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:08:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:08:02,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:08:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:08:02,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832199181] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:08:02,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:08:02,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-31 02:08:02,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275047980] [2023-08-31 02:08:02,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:08:02,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 02:08:02,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:08:02,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 02:08:02,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-31 02:08:02,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 551 [2023-08-31 02:08:02,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 301 flow. Second operand has 9 states, 9 states have (on average 262.77777777777777) internal successors, (2365), 9 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:02,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:08:02,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 551 [2023-08-31 02:08:02,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:08:05,055 INFO L130 PetriNetUnfolder]: 15199/20692 cut-off events. [2023-08-31 02:08:05,055 INFO L131 PetriNetUnfolder]: For 25443/25613 co-relation queries the response was YES. [2023-08-31 02:08:05,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52360 conditions, 20692 events. 15199/20692 cut-off events. For 25443/25613 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 105822 event pairs, 2824 based on Foata normal form. 1074/20023 useless extension candidates. Maximal degree in co-relation 49911. Up to 10211 conditions per place. [2023-08-31 02:08:05,168 INFO L137 encePairwiseOnDemand]: 542/551 looper letters, 122 selfloop transitions, 18 changer transitions 68/230 dead transitions. [2023-08-31 02:08:05,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 230 transitions, 1136 flow [2023-08-31 02:08:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 02:08:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 02:08:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2996 transitions. [2023-08-31 02:08:05,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943078699884508 [2023-08-31 02:08:05,176 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2996 transitions. [2023-08-31 02:08:05,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2996 transitions. [2023-08-31 02:08:05,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:08:05,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2996 transitions. [2023-08-31 02:08:05,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 272.3636363636364) internal successors, (2996), 11 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:05,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 551.0) internal successors, (6612), 12 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:05,193 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 551.0) internal successors, (6612), 12 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:05,193 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 301 flow. Second operand 11 states and 2996 transitions. [2023-08-31 02:08:05,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 230 transitions, 1136 flow [2023-08-31 02:08:05,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 230 transitions, 1120 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 02:08:05,213 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 356 flow [2023-08-31 02:08:05,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=356, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2023-08-31 02:08:05,214 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 17 predicate places. [2023-08-31 02:08:05,215 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 356 flow [2023-08-31 02:08:05,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 262.77777777777777) internal successors, (2365), 9 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:05,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:08:05,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:08:05,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 02:08:05,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:05,423 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-31 02:08:05,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:08:05,423 INFO L85 PathProgramCache]: Analyzing trace with hash -501703849, now seen corresponding path program 1 times [2023-08-31 02:08:05,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:08:05,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802785712] [2023-08-31 02:08:05,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:05,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:08:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:06,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:08:06,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802785712] [2023-08-31 02:08:06,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802785712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:08:06,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61412701] [2023-08-31 02:08:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:06,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:06,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:08:06,820 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) [2023-08-31 02:08:06,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 02:08:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:06,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 74 conjunts are in the unsatisfiable core [2023-08-31 02:08:06,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:08:07,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 02:08:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:08:07,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:08:08,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:08:08,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-08-31 02:08:08,030 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 02:08:08,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 14 [2023-08-31 02:08:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:08:08,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61412701] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:08:08,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:08:08,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-08-31 02:08:08,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673760935] [2023-08-31 02:08:08,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:08:08,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 02:08:08,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:08:08,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 02:08:08,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-08-31 02:08:09,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 551 [2023-08-31 02:08:09,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 81 transitions, 356 flow. Second operand has 18 states, 18 states have (on average 237.72222222222223) internal successors, (4279), 18 states have internal predecessors, (4279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:09,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:08:09,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 551 [2023-08-31 02:08:09,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:08:18,665 INFO L130 PetriNetUnfolder]: 65456/87003 cut-off events. [2023-08-31 02:08:18,665 INFO L131 PetriNetUnfolder]: For 89558/90137 co-relation queries the response was YES. [2023-08-31 02:08:18,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233976 conditions, 87003 events. 65456/87003 cut-off events. For 89558/90137 co-relation queries the response was YES. Maximal size of possible extension queue 1776. Compared 490236 event pairs, 6868 based on Foata normal form. 1980/82979 useless extension candidates. Maximal degree in co-relation 233961. Up to 13423 conditions per place. [2023-08-31 02:08:19,220 INFO L137 encePairwiseOnDemand]: 537/551 looper letters, 647 selfloop transitions, 170 changer transitions 81/915 dead transitions. [2023-08-31 02:08:19,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 915 transitions, 5169 flow [2023-08-31 02:08:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 02:08:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 02:08:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 9409 transitions. [2023-08-31 02:08:19,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4615195958208662 [2023-08-31 02:08:19,243 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 9409 transitions. [2023-08-31 02:08:19,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 9409 transitions. [2023-08-31 02:08:19,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:08:19,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 9409 transitions. [2023-08-31 02:08:19,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 254.2972972972973) internal successors, (9409), 37 states have internal predecessors, (9409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:19,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 551.0) internal successors, (20938), 38 states have internal predecessors, (20938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:19,303 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 551.0) internal successors, (20938), 38 states have internal predecessors, (20938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:19,303 INFO L175 Difference]: Start difference. First operand has 88 places, 81 transitions, 356 flow. Second operand 37 states and 9409 transitions. [2023-08-31 02:08:19,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 915 transitions, 5169 flow [2023-08-31 02:08:19,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 915 transitions, 5001 flow, removed 73 selfloop flow, removed 3 redundant places. [2023-08-31 02:08:19,543 INFO L231 Difference]: Finished difference. Result has 138 places, 258 transitions, 1990 flow [2023-08-31 02:08:19,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1990, PETRI_PLACES=138, PETRI_TRANSITIONS=258} [2023-08-31 02:08:19,544 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 67 predicate places. [2023-08-31 02:08:19,544 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 258 transitions, 1990 flow [2023-08-31 02:08:19,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 237.72222222222223) internal successors, (4279), 18 states have internal predecessors, (4279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:19,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:08:19,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:08:19,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 02:08:19,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:19,753 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-31 02:08:19,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:08:19,754 INFO L85 PathProgramCache]: Analyzing trace with hash 598885593, now seen corresponding path program 1 times [2023-08-31 02:08:19,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:08:19,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825503314] [2023-08-31 02:08:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:19,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:08:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:21,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:08:21,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825503314] [2023-08-31 02:08:21,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825503314] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:08:21,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255920254] [2023-08-31 02:08:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:21,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:21,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:08:21,172 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:08:21,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 02:08:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:21,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 87 conjunts are in the unsatisfiable core [2023-08-31 02:08:21,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:08:22,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:08:22,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 02:08:22,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 02:08:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:22,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:08:22,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:08:22,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 46 [2023-08-31 02:08:22,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2023-08-31 02:08:22,921 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 02:08:22,927 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-31 02:08:22,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-31 02:08:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:23,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255920254] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:08:23,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:08:23,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-31 02:08:23,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812524800] [2023-08-31 02:08:23,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:08:23,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 02:08:23,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:08:23,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 02:08:23,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=764, Unknown=1, NotChecked=0, Total=870 [2023-08-31 02:08:23,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 551 [2023-08-31 02:08:23,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 258 transitions, 1990 flow. Second operand has 30 states, 30 states have (on average 202.16666666666666) internal successors, (6065), 30 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:23,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:08:23,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 551 [2023-08-31 02:08:23,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:09:20,037 INFO L130 PetriNetUnfolder]: 198339/260446 cut-off events. [2023-08-31 02:09:20,037 INFO L131 PetriNetUnfolder]: For 448863/449051 co-relation queries the response was YES. [2023-08-31 02:09:21,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 773051 conditions, 260446 events. 198339/260446 cut-off events. For 448863/449051 co-relation queries the response was YES. Maximal size of possible extension queue 5003. Compared 1607414 event pairs, 11227 based on Foata normal form. 965/244704 useless extension candidates. Maximal degree in co-relation 773014. Up to 28741 conditions per place. [2023-08-31 02:09:22,788 INFO L137 encePairwiseOnDemand]: 534/551 looper letters, 2102 selfloop transitions, 822 changer transitions 276/3211 dead transitions. [2023-08-31 02:09:22,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 3211 transitions, 21363 flow [2023-08-31 02:09:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2023-08-31 02:09:22,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2023-08-31 02:09:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 30132 transitions. [2023-08-31 02:09:22,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39627554643730767 [2023-08-31 02:09:22,842 INFO L72 ComplementDD]: Start complementDD. Operand 138 states and 30132 transitions. [2023-08-31 02:09:22,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138 states and 30132 transitions. [2023-08-31 02:09:22,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:09:22,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 138 states and 30132 transitions. [2023-08-31 02:09:22,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 139 states, 138 states have (on average 218.34782608695653) internal successors, (30132), 138 states have internal predecessors, (30132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:23,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 139 states, 139 states have (on average 551.0) internal successors, (76589), 139 states have internal predecessors, (76589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:23,027 INFO L81 ComplementDD]: Finished complementDD. Result has 139 states, 139 states have (on average 551.0) internal successors, (76589), 139 states have internal predecessors, (76589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:23,027 INFO L175 Difference]: Start difference. First operand has 138 places, 258 transitions, 1990 flow. Second operand 138 states and 30132 transitions. [2023-08-31 02:09:23,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 3211 transitions, 21363 flow [2023-08-31 02:09:38,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 3211 transitions, 19833 flow, removed 649 selfloop flow, removed 14 redundant places. [2023-08-31 02:09:38,572 INFO L231 Difference]: Finished difference. Result has 344 places, 962 transitions, 9283 flow [2023-08-31 02:09:38,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=138, PETRI_FLOW=9283, PETRI_PLACES=344, PETRI_TRANSITIONS=962} [2023-08-31 02:09:38,573 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 273 predicate places. [2023-08-31 02:09:38,573 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 962 transitions, 9283 flow [2023-08-31 02:09:38,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 202.16666666666666) internal successors, (6065), 30 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:38,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:09:38,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:09:38,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 02:09:38,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:09:38,781 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-31 02:09:38,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:09:38,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1453018889, now seen corresponding path program 1 times [2023-08-31 02:09:38,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:09:38,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162568264] [2023-08-31 02:09:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:09:38,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:09:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:09:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:09:39,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:09:39,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162568264] [2023-08-31 02:09:39,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162568264] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:09:39,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203279641] [2023-08-31 02:09:39,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:09:39,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:09:39,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:09:39,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:09:39,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 02:09:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:09:40,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 74 conjunts are in the unsatisfiable core [2023-08-31 02:09:40,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:09:40,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 02:09:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:09:40,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:09:40,925 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:09:40,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-08-31 02:09:40,938 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 02:09:40,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 14 [2023-08-31 02:09:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:09:41,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203279641] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:09:41,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:09:41,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-08-31 02:09:41,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189497885] [2023-08-31 02:09:41,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:09:41,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 02:09:41,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:09:41,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 02:09:41,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-08-31 02:09:42,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 551 [2023-08-31 02:09:42,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 962 transitions, 9283 flow. Second operand has 18 states, 18 states have (on average 237.55555555555554) internal successors, (4276), 18 states have internal predecessors, (4276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:09:42,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:09:42,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 551 [2023-08-31 02:09:42,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand