./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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-misc-4.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 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 12:44:44,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:44:44,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:44:44,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:44:44,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:44:44,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:44:44,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:44:44,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:44:44,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:44:44,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:44:44,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:44:44,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:44:44,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:44:44,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:44:44,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:44:44,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:44:44,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:44:44,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:44:44,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:44:44,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:44:44,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:44:44,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:44:44,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:44:44,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:44:44,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:44:44,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:44:44,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:44:44,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:44:44,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:44:44,222 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:44:44,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:44:44,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:44:44,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:44:44,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:44:44,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:44:44,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:44:44,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:44:44,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:44:44,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:44:44,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:44:44,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:44:44,233 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:44:44,261 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:44:44,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:44:44,262 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:44:44,262 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:44:44,263 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:44:44,264 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:44:44,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:44:44,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:44:44,264 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:44:44,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:44:44,265 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:44:44,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:44:44,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:44:44,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:44:44,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:44:44,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:44:44,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:44:44,267 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:44:44,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:44:44,267 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:44:44,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:44:44,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:44:44,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:44:44,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:44:44,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:44:44,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:44:44,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:44:44,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:44:44,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:44:44,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:44:44,270 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:44:44,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:44:44,270 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:44:44,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:44:44,270 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:44:44,271 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:44:44,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:44:44,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:44:44,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:44:44,613 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:44:44,614 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:44:44,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-09-01 12:44:45,742 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:44:45,951 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:44:45,951 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-09-01 12:44:45,963 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ed8b323/49d206fd5da2420e908f0a017ec1ef69/FLAGd37391d50 [2023-09-01 12:44:45,983 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ed8b323/49d206fd5da2420e908f0a017ec1ef69 [2023-09-01 12:44:45,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:44:45,987 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:44:45,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:44:45,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:44:45,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:44:45,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:44:45" (1/1) ... [2023-09-01 12:44:45,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a5f0bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:45, skipping insertion in model container [2023-09-01 12:44:45,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:44:45" (1/1) ... [2023-09-01 12:44:46,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:44:46,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:44:46,218 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-misc-4.wvr.c[2950,2963] [2023-09-01 12:44:46,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:44:46,237 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:44:46,273 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-misc-4.wvr.c[2950,2963] [2023-09-01 12:44:46,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:44:46,284 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:44:46,286 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:44:46,291 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:44:46,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:46 WrapperNode [2023-09-01 12:44:46,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:44:46,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:44:46,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:44:46,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:44:46,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:46" (1/1) ... [2023-09-01 12:44:46,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:46" (1/1) ... [2023-09-01 12:44:46,337 INFO L138 Inliner]: procedures = 22, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-09-01 12:44:46,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:44:46,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:44:46,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:44:46,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:44:46,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:46" (1/1) ... [2023-09-01 12:44:46,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:46" (1/1) ... [2023-09-01 12:44:46,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:46" (1/1) ... [2023-09-01 12:44:46,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:46" (1/1) ... [2023-09-01 12:44:46,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:46" (1/1) ... [2023-09-01 12:44:46,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:46" (1/1) ... [2023-09-01 12:44:46,376 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:46" (1/1) ... [2023-09-01 12:44:46,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:46" (1/1) ... [2023-09-01 12:44:46,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:44:46,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:44:46,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:44:46,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:44:46,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:46" (1/1) ... [2023-09-01 12:44:46,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:44:46,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:44:46,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 12:44:46,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 12:44:46,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:44:46,476 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:44:46,477 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:44:46,477 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:44:46,477 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:44:46,477 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 12:44:46,478 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 12:44:46,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:44:46,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:44:46,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:44:46,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 12:44:46,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 12:44:46,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:44:46,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:44:46,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:44:46,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:44:46,480 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 12:44:46,585 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:44:46,587 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:44:46,824 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:44:46,843 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:44:46,843 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 12:44:46,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:44:46 BoogieIcfgContainer [2023-09-01 12:44:46,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:44:46,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:44:46,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:44:46,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:44:46,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:44:45" (1/3) ... [2023-09-01 12:44:46,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb9f47f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:44:46, skipping insertion in model container [2023-09-01 12:44:46,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:46" (2/3) ... [2023-09-01 12:44:46,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb9f47f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:44:46, skipping insertion in model container [2023-09-01 12:44:46,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:44:46" (3/3) ... [2023-09-01 12:44:46,852 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2023-09-01 12:44:46,859 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:44:46,866 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:44:46,866 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:44:46,866 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:44:46,917 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 12:44:46,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 103 transitions, 230 flow [2023-09-01 12:44:47,001 INFO L130 PetriNetUnfolder]: 7/100 cut-off events. [2023-09-01 12:44:47,004 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:44:47,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 7/100 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2023-09-01 12:44:47,009 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 103 transitions, 230 flow [2023-09-01 12:44:47,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 90 transitions, 198 flow [2023-09-01 12:44:47,018 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:44:47,028 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 90 transitions, 198 flow [2023-09-01 12:44:47,034 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 90 transitions, 198 flow [2023-09-01 12:44:47,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 90 transitions, 198 flow [2023-09-01 12:44:47,074 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2023-09-01 12:44:47,075 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:44:47,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 90 events. 7/90 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2023-09-01 12:44:47,079 INFO L119 LiptonReduction]: Number of co-enabled transitions 1134 [2023-09-01 12:44:49,652 INFO L134 LiptonReduction]: Checked pairs total: 1280 [2023-09-01 12:44:49,652 INFO L136 LiptonReduction]: Total number of compositions: 73 [2023-09-01 12:44:49,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:44:49,669 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;@5ee0171b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:44:49,669 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 12:44:49,674 INFO L130 PetriNetUnfolder]: 2/21 cut-off events. [2023-09-01 12:44:49,675 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:44:49,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:49,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:49,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:49,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:49,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1669197162, now seen corresponding path program 1 times [2023-09-01 12:44:49,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:49,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993581479] [2023-09-01 12:44:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:49,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:50,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:50,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993581479] [2023-09-01 12:44:50,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993581479] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:44:50,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:44:50,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:44:50,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326324527] [2023-09-01 12:44:50,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:44:50,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:44:50,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:50,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:44:50,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:44:50,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 176 [2023-09-01 12:44:50,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:50,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:50,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 176 [2023-09-01 12:44:50,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:50,684 INFO L130 PetriNetUnfolder]: 416/658 cut-off events. [2023-09-01 12:44:50,684 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-09-01 12:44:50,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 658 events. 416/658 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2588 event pairs, 65 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 1127. Up to 373 conditions per place. [2023-09-01 12:44:50,692 INFO L137 encePairwiseOnDemand]: 169/176 looper letters, 52 selfloop transitions, 5 changer transitions 19/77 dead transitions. [2023-09-01 12:44:50,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 77 transitions, 360 flow [2023-09-01 12:44:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:44:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:44:50,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 645 transitions. [2023-09-01 12:44:50,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523538961038961 [2023-09-01 12:44:50,714 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 645 transitions. [2023-09-01 12:44:50,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 645 transitions. [2023-09-01 12:44:50,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:50,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 645 transitions. [2023-09-01 12:44:50,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.14285714285714) internal successors, (645), 7 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:50,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 176.0) internal successors, (1408), 8 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:50,728 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 176.0) internal successors, (1408), 8 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:50,730 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 62 flow. Second operand 7 states and 645 transitions. [2023-09-01 12:44:50,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 77 transitions, 360 flow [2023-09-01 12:44:50,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 77 transitions, 324 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 12:44:50,735 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2023-09-01 12:44:50,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=99, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-09-01 12:44:50,740 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-09-01 12:44:50,740 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2023-09-01 12:44:50,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:50,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:50,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:50,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:44:50,741 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:50,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:50,742 INFO L85 PathProgramCache]: Analyzing trace with hash -925139408, now seen corresponding path program 2 times [2023-09-01 12:44:50,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:50,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099644726] [2023-09-01 12:44:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:50,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:51,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:51,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099644726] [2023-09-01 12:44:51,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099644726] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:44:51,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:44:51,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:44:51,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527759482] [2023-09-01 12:44:51,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:44:51,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:44:51,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:51,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:44:51,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:44:51,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 176 [2023-09-01 12:44:51,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:51,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:51,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 176 [2023-09-01 12:44:51,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:51,215 INFO L130 PetriNetUnfolder]: 268/444 cut-off events. [2023-09-01 12:44:51,215 INFO L131 PetriNetUnfolder]: For 557/573 co-relation queries the response was YES. [2023-09-01 12:44:51,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1416 conditions, 444 events. 268/444 cut-off events. For 557/573 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1669 event pairs, 18 based on Foata normal form. 28/462 useless extension candidates. Maximal degree in co-relation 919. Up to 249 conditions per place. [2023-09-01 12:44:51,221 INFO L137 encePairwiseOnDemand]: 172/176 looper letters, 37 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2023-09-01 12:44:51,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 262 flow [2023-09-01 12:44:51,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:44:51,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:44:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 378 transitions. [2023-09-01 12:44:51,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369318181818182 [2023-09-01 12:44:51,223 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 378 transitions. [2023-09-01 12:44:51,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 378 transitions. [2023-09-01 12:44:51,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:51,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 378 transitions. [2023-09-01 12:44:51,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.5) internal successors, (378), 4 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:51,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:51,227 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:51,227 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 4 states and 378 transitions. [2023-09-01 12:44:51,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 262 flow [2023-09-01 12:44:51,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 247 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 12:44:51,232 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 124 flow [2023-09-01 12:44:51,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-09-01 12:44:51,233 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-09-01 12:44:51,233 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 124 flow [2023-09-01 12:44:51,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:51,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:51,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:51,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 12:44:51,234 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:51,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:51,236 INFO L85 PathProgramCache]: Analyzing trace with hash -377288482, now seen corresponding path program 3 times [2023-09-01 12:44:51,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:51,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045331210] [2023-09-01 12:44:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:51,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:51,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:51,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045331210] [2023-09-01 12:44:51,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045331210] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:44:51,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:44:51,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:44:51,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980765655] [2023-09-01 12:44:51,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:44:51,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:44:51,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:51,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:44:51,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:44:51,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 176 [2023-09-01 12:44:51,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:51,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:51,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 176 [2023-09-01 12:44:51,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:51,633 INFO L130 PetriNetUnfolder]: 199/353 cut-off events. [2023-09-01 12:44:51,633 INFO L131 PetriNetUnfolder]: For 413/430 co-relation queries the response was YES. [2023-09-01 12:44:51,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1136 conditions, 353 events. 199/353 cut-off events. For 413/430 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1231 event pairs, 32 based on Foata normal form. 33/386 useless extension candidates. Maximal degree in co-relation 1025. Up to 221 conditions per place. [2023-09-01 12:44:51,636 INFO L137 encePairwiseOnDemand]: 172/176 looper letters, 33 selfloop transitions, 7 changer transitions 2/44 dead transitions. [2023-09-01 12:44:51,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 281 flow [2023-09-01 12:44:51,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:44:51,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:44:51,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 374 transitions. [2023-09-01 12:44:51,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2023-09-01 12:44:51,638 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 374 transitions. [2023-09-01 12:44:51,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 374 transitions. [2023-09-01 12:44:51,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:51,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 374 transitions. [2023-09-01 12:44:51,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:51,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:51,641 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:51,642 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 124 flow. Second operand 4 states and 374 transitions. [2023-09-01 12:44:51,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 281 flow [2023-09-01 12:44:51,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:44:51,646 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 156 flow [2023-09-01 12:44:51,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2023-09-01 12:44:51,648 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2023-09-01 12:44:51,650 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 156 flow [2023-09-01 12:44:51,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:51,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:51,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:51,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 12:44:51,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:51,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:51,652 INFO L85 PathProgramCache]: Analyzing trace with hash -762312740, now seen corresponding path program 4 times [2023-09-01 12:44:51,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:51,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540257991] [2023-09-01 12:44:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:51,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:51,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:51,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540257991] [2023-09-01 12:44:51,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540257991] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:44:51,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:44:51,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:44:51,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581675917] [2023-09-01 12:44:51,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:44:51,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:44:51,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:51,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:44:51,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:44:51,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 176 [2023-09-01 12:44:51,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:51,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:51,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 176 [2023-09-01 12:44:51,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:52,075 INFO L130 PetriNetUnfolder]: 209/361 cut-off events. [2023-09-01 12:44:52,076 INFO L131 PetriNetUnfolder]: For 616/642 co-relation queries the response was YES. [2023-09-01 12:44:52,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1248 conditions, 361 events. 209/361 cut-off events. For 616/642 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1215 event pairs, 22 based on Foata normal form. 26/383 useless extension candidates. Maximal degree in co-relation 1078. Up to 146 conditions per place. [2023-09-01 12:44:52,079 INFO L137 encePairwiseOnDemand]: 170/176 looper letters, 38 selfloop transitions, 10 changer transitions 0/50 dead transitions. [2023-09-01 12:44:52,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 338 flow [2023-09-01 12:44:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:44:52,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:44:52,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 461 transitions. [2023-09-01 12:44:52,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238636363636363 [2023-09-01 12:44:52,081 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 461 transitions. [2023-09-01 12:44:52,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 461 transitions. [2023-09-01 12:44:52,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:52,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 461 transitions. [2023-09-01 12:44:52,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:52,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 176.0) internal successors, (1056), 6 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:52,085 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 176.0) internal successors, (1056), 6 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:52,085 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 156 flow. Second operand 5 states and 461 transitions. [2023-09-01 12:44:52,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 338 flow [2023-09-01 12:44:52,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 328 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 12:44:52,088 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 202 flow [2023-09-01 12:44:52,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-09-01 12:44:52,088 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-09-01 12:44:52,089 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 202 flow [2023-09-01 12:44:52,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:52,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:52,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:52,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 12:44:52,090 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:52,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:52,090 INFO L85 PathProgramCache]: Analyzing trace with hash 366060416, now seen corresponding path program 5 times [2023-09-01 12:44:52,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:52,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478181713] [2023-09-01 12:44:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:52,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:52,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:52,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478181713] [2023-09-01 12:44:52,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478181713] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:44:52,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:44:52,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:44:52,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264913277] [2023-09-01 12:44:52,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:44:52,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:44:52,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:52,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:44:52,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:44:52,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 176 [2023-09-01 12:44:52,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:52,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:52,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 176 [2023-09-01 12:44:52,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:52,388 INFO L130 PetriNetUnfolder]: 199/330 cut-off events. [2023-09-01 12:44:52,388 INFO L131 PetriNetUnfolder]: For 1001/1029 co-relation queries the response was YES. [2023-09-01 12:44:52,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1300 conditions, 330 events. 199/330 cut-off events. For 1001/1029 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1058 event pairs, 15 based on Foata normal form. 25/349 useless extension candidates. Maximal degree in co-relation 898. Up to 240 conditions per place. [2023-09-01 12:44:52,391 INFO L137 encePairwiseOnDemand]: 169/176 looper letters, 31 selfloop transitions, 3 changer transitions 18/54 dead transitions. [2023-09-01 12:44:52,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 402 flow [2023-09-01 12:44:52,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:44:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:44:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2023-09-01 12:44:52,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4991883116883117 [2023-09-01 12:44:52,393 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2023-09-01 12:44:52,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2023-09-01 12:44:52,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:52,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2023-09-01 12:44:52,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:52,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 176.0) internal successors, (1408), 8 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:52,397 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 176.0) internal successors, (1408), 8 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:52,397 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 202 flow. Second operand 7 states and 615 transitions. [2023-09-01 12:44:52,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 402 flow [2023-09-01 12:44:52,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 12:44:52,400 INFO L231 Difference]: Finished difference. Result has 52 places, 30 transitions, 168 flow [2023-09-01 12:44:52,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=168, PETRI_PLACES=52, PETRI_TRANSITIONS=30} [2023-09-01 12:44:52,401 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2023-09-01 12:44:52,401 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 30 transitions, 168 flow [2023-09-01 12:44:52,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:52,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:52,402 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] [2023-09-01 12:44:52,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 12:44:52,402 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:52,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:52,403 INFO L85 PathProgramCache]: Analyzing trace with hash 156642809, now seen corresponding path program 1 times [2023-09-01 12:44:52,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:52,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088466957] [2023-09-01 12:44:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:52,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:52,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:52,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088466957] [2023-09-01 12:44:52,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088466957] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:44:52,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:44:52,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 12:44:52,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742058792] [2023-09-01 12:44:52,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:44:52,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:44:52,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:52,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:44:52,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:44:52,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 176 [2023-09-01 12:44:52,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 30 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:52,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:52,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 176 [2023-09-01 12:44:52,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:52,810 INFO L130 PetriNetUnfolder]: 335/554 cut-off events. [2023-09-01 12:44:52,810 INFO L131 PetriNetUnfolder]: For 1326/1326 co-relation queries the response was YES. [2023-09-01 12:44:52,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2223 conditions, 554 events. 335/554 cut-off events. For 1326/1326 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1992 event pairs, 14 based on Foata normal form. 16/570 useless extension candidates. Maximal degree in co-relation 2112. Up to 191 conditions per place. [2023-09-01 12:44:52,815 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 76 selfloop transitions, 34 changer transitions 0/110 dead transitions. [2023-09-01 12:44:52,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 110 transitions, 835 flow [2023-09-01 12:44:52,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:44:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:44:52,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 825 transitions. [2023-09-01 12:44:52,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2023-09-01 12:44:52,818 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 825 transitions. [2023-09-01 12:44:52,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 825 transitions. [2023-09-01 12:44:52,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:52,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 825 transitions. [2023-09-01 12:44:52,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.66666666666667) internal successors, (825), 9 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:52,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:52,823 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:52,823 INFO L175 Difference]: Start difference. First operand has 52 places, 30 transitions, 168 flow. Second operand 9 states and 825 transitions. [2023-09-01 12:44:52,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 110 transitions, 835 flow [2023-09-01 12:44:52,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 110 transitions, 779 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-09-01 12:44:52,831 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 507 flow [2023-09-01 12:44:52,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=507, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-09-01 12:44:52,833 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2023-09-01 12:44:52,834 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 507 flow [2023-09-01 12:44:52,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:52,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:52,836 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] [2023-09-01 12:44:52,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 12:44:52,836 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:52,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:52,836 INFO L85 PathProgramCache]: Analyzing trace with hash -960778785, now seen corresponding path program 2 times [2023-09-01 12:44:52,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:52,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103007440] [2023-09-01 12:44:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:52,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:53,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:53,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103007440] [2023-09-01 12:44:53,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103007440] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:44:53,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:44:53,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 12:44:53,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902686397] [2023-09-01 12:44:53,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:44:53,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:44:53,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:53,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:44:53,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:44:53,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 176 [2023-09-01 12:44:53,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 507 flow. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:53,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:53,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 176 [2023-09-01 12:44:53,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:53,324 INFO L130 PetriNetUnfolder]: 483/856 cut-off events. [2023-09-01 12:44:53,325 INFO L131 PetriNetUnfolder]: For 5283/5283 co-relation queries the response was YES. [2023-09-01 12:44:53,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4418 conditions, 856 events. 483/856 cut-off events. For 5283/5283 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3629 event pairs, 39 based on Foata normal form. 20/876 useless extension candidates. Maximal degree in co-relation 3390. Up to 303 conditions per place. [2023-09-01 12:44:53,332 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 98 selfloop transitions, 61 changer transitions 0/159 dead transitions. [2023-09-01 12:44:53,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 159 transitions, 1568 flow [2023-09-01 12:44:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:44:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:44:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 823 transitions. [2023-09-01 12:44:53,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195707070707071 [2023-09-01 12:44:53,335 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 823 transitions. [2023-09-01 12:44:53,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 823 transitions. [2023-09-01 12:44:53,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:53,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 823 transitions. [2023-09-01 12:44:53,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.44444444444444) internal successors, (823), 9 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:53,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:53,340 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:53,340 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 507 flow. Second operand 9 states and 823 transitions. [2023-09-01 12:44:53,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 159 transitions, 1568 flow [2023-09-01 12:44:53,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 159 transitions, 1550 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-09-01 12:44:53,354 INFO L231 Difference]: Finished difference. Result has 71 places, 99 transitions, 1193 flow [2023-09-01 12:44:53,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1193, PETRI_PLACES=71, PETRI_TRANSITIONS=99} [2023-09-01 12:44:53,355 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2023-09-01 12:44:53,355 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 99 transitions, 1193 flow [2023-09-01 12:44:53,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:53,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:53,355 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] [2023-09-01 12:44:53,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 12:44:53,356 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:53,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:53,356 INFO L85 PathProgramCache]: Analyzing trace with hash -602311999, now seen corresponding path program 3 times [2023-09-01 12:44:53,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:53,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223536238] [2023-09-01 12:44:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:53,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:53,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:53,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223536238] [2023-09-01 12:44:53,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223536238] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:44:53,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:44:53,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 12:44:53,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579738849] [2023-09-01 12:44:53,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:44:53,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:44:53,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:53,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:44:53,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:44:53,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 176 [2023-09-01 12:44:53,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 99 transitions, 1193 flow. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:53,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:53,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 176 [2023-09-01 12:44:53,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:53,769 INFO L130 PetriNetUnfolder]: 568/983 cut-off events. [2023-09-01 12:44:53,769 INFO L131 PetriNetUnfolder]: For 11208/11208 co-relation queries the response was YES. [2023-09-01 12:44:53,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6248 conditions, 983 events. 568/983 cut-off events. For 11208/11208 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4232 event pairs, 8 based on Foata normal form. 40/1023 useless extension candidates. Maximal degree in co-relation 5213. Up to 472 conditions per place. [2023-09-01 12:44:53,778 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 97 selfloop transitions, 42 changer transitions 35/174 dead transitions. [2023-09-01 12:44:53,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 174 transitions, 2309 flow [2023-09-01 12:44:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:44:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:44:53,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 799 transitions. [2023-09-01 12:44:53,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044191919191919 [2023-09-01 12:44:53,781 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 799 transitions. [2023-09-01 12:44:53,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 799 transitions. [2023-09-01 12:44:53,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:53,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 799 transitions. [2023-09-01 12:44:53,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 88.77777777777777) internal successors, (799), 9 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:53,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:53,786 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:53,786 INFO L175 Difference]: Start difference. First operand has 71 places, 99 transitions, 1193 flow. Second operand 9 states and 799 transitions. [2023-09-01 12:44:53,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 174 transitions, 2309 flow [2023-09-01 12:44:53,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 174 transitions, 2191 flow, removed 59 selfloop flow, removed 0 redundant places. [2023-09-01 12:44:53,842 INFO L231 Difference]: Finished difference. Result has 85 places, 104 transitions, 1387 flow [2023-09-01 12:44:53,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1387, PETRI_PLACES=85, PETRI_TRANSITIONS=104} [2023-09-01 12:44:53,843 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2023-09-01 12:44:53,843 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 104 transitions, 1387 flow [2023-09-01 12:44:53,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:53,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:53,844 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] [2023-09-01 12:44:53,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 12:44:53,844 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:53,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:53,845 INFO L85 PathProgramCache]: Analyzing trace with hash 2082278653, now seen corresponding path program 4 times [2023-09-01 12:44:53,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:53,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885567949] [2023-09-01 12:44:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:53,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:54,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:54,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885567949] [2023-09-01 12:44:54,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885567949] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:44:54,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:44:54,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 12:44:54,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001411577] [2023-09-01 12:44:54,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:44:54,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 12:44:54,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:54,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 12:44:54,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-09-01 12:44:54,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 176 [2023-09-01 12:44:54,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 104 transitions, 1387 flow. Second operand has 7 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:54,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:54,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 176 [2023-09-01 12:44:54,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:54,664 INFO L130 PetriNetUnfolder]: 505/924 cut-off events. [2023-09-01 12:44:54,664 INFO L131 PetriNetUnfolder]: For 11746/11782 co-relation queries the response was YES. [2023-09-01 12:44:54,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6076 conditions, 924 events. 505/924 cut-off events. For 11746/11782 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4282 event pairs, 30 based on Foata normal form. 30/947 useless extension candidates. Maximal degree in co-relation 4837. Up to 642 conditions per place. [2023-09-01 12:44:54,672 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 102 selfloop transitions, 13 changer transitions 60/182 dead transitions. [2023-09-01 12:44:54,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 182 transitions, 2663 flow [2023-09-01 12:44:54,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:44:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:44:54,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 840 transitions. [2023-09-01 12:44:54,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2023-09-01 12:44:54,675 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 840 transitions. [2023-09-01 12:44:54,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 840 transitions. [2023-09-01 12:44:54,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:54,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 840 transitions. [2023-09-01 12:44:54,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:54,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 176.0) internal successors, (1936), 11 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:54,680 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 176.0) internal successors, (1936), 11 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:54,681 INFO L175 Difference]: Start difference. First operand has 85 places, 104 transitions, 1387 flow. Second operand 10 states and 840 transitions. [2023-09-01 12:44:54,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 182 transitions, 2663 flow [2023-09-01 12:44:54,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 182 transitions, 2565 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-09-01 12:44:54,715 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 1505 flow [2023-09-01 12:44:54,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1505, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2023-09-01 12:44:54,715 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2023-09-01 12:44:54,716 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 1505 flow [2023-09-01 12:44:54,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:54,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:54,716 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] [2023-09-01 12:44:54,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 12:44:54,717 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:54,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:54,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1139668964, now seen corresponding path program 1 times [2023-09-01 12:44:54,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:54,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026059646] [2023-09-01 12:44:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:54,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:54,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:54,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026059646] [2023-09-01 12:44:54,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026059646] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:44:54,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:44:54,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 12:44:54,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767396673] [2023-09-01 12:44:54,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:44:54,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 12:44:54,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:54,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 12:44:54,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-09-01 12:44:54,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 176 [2023-09-01 12:44:54,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 1505 flow. Second operand has 6 states, 6 states have (on average 80.16666666666667) internal successors, (481), 6 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:54,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:54,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 176 [2023-09-01 12:44:54,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:55,252 INFO L130 PetriNetUnfolder]: 569/1016 cut-off events. [2023-09-01 12:44:55,253 INFO L131 PetriNetUnfolder]: For 13840/13853 co-relation queries the response was YES. [2023-09-01 12:44:55,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7253 conditions, 1016 events. 569/1016 cut-off events. For 13840/13853 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4581 event pairs, 31 based on Foata normal form. 55/1069 useless extension candidates. Maximal degree in co-relation 6035. Up to 681 conditions per place. [2023-09-01 12:44:55,263 INFO L137 encePairwiseOnDemand]: 169/176 looper letters, 112 selfloop transitions, 13 changer transitions 63/193 dead transitions. [2023-09-01 12:44:55,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 193 transitions, 3064 flow [2023-09-01 12:44:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:44:55,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:44:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 679 transitions. [2023-09-01 12:44:55,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4822443181818182 [2023-09-01 12:44:55,266 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 679 transitions. [2023-09-01 12:44:55,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 679 transitions. [2023-09-01 12:44:55,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:55,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 679 transitions. [2023-09-01 12:44:55,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 84.875) internal successors, (679), 8 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:55,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 176.0) internal successors, (1584), 9 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:55,271 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 176.0) internal successors, (1584), 9 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:55,271 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 1505 flow. Second operand 8 states and 679 transitions. [2023-09-01 12:44:55,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 193 transitions, 3064 flow [2023-09-01 12:44:55,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 193 transitions, 2893 flow, removed 44 selfloop flow, removed 6 redundant places. [2023-09-01 12:44:55,321 INFO L231 Difference]: Finished difference. Result has 96 places, 116 transitions, 1613 flow [2023-09-01 12:44:55,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1613, PETRI_PLACES=96, PETRI_TRANSITIONS=116} [2023-09-01 12:44:55,322 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2023-09-01 12:44:55,322 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 116 transitions, 1613 flow [2023-09-01 12:44:55,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.16666666666667) internal successors, (481), 6 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:55,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:55,323 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:55,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 12:44:55,323 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:55,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:55,323 INFO L85 PathProgramCache]: Analyzing trace with hash -696084226, now seen corresponding path program 5 times [2023-09-01 12:44:55,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:55,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902385348] [2023-09-01 12:44:55,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:55,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:55,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:55,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902385348] [2023-09-01 12:44:55,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902385348] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:44:55,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475962135] [2023-09-01 12:44:55,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:44:55,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:44:55,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:44:55,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:44:55,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 12:44:55,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:44:55,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:44:55,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 12:44:55,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:44:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:56,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:44:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:56,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475962135] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:44:56,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:44:56,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-09-01 12:44:56,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177923929] [2023-09-01 12:44:56,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:44:56,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:44:56,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:56,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:44:56,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:44:56,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 176 [2023-09-01 12:44:56,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 116 transitions, 1613 flow. Second operand has 17 states, 17 states have (on average 77.3529411764706) internal successors, (1315), 17 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:56,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:56,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 176 [2023-09-01 12:44:56,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:58,367 INFO L130 PetriNetUnfolder]: 1087/1933 cut-off events. [2023-09-01 12:44:58,367 INFO L131 PetriNetUnfolder]: For 29181/29185 co-relation queries the response was YES. [2023-09-01 12:44:58,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13616 conditions, 1933 events. 1087/1933 cut-off events. For 29181/29185 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10236 event pairs, 14 based on Foata normal form. 84/2016 useless extension candidates. Maximal degree in co-relation 11291. Up to 611 conditions per place. [2023-09-01 12:44:58,386 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 149 selfloop transitions, 119 changer transitions 213/488 dead transitions. [2023-09-01 12:44:58,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 488 transitions, 7190 flow [2023-09-01 12:44:58,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 12:44:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 12:44:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3246 transitions. [2023-09-01 12:44:58,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46107954545454544 [2023-09-01 12:44:58,398 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3246 transitions. [2023-09-01 12:44:58,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3246 transitions. [2023-09-01 12:44:58,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:58,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3246 transitions. [2023-09-01 12:44:58,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 81.15) internal successors, (3246), 40 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:58,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 176.0) internal successors, (7216), 41 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:58,420 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 176.0) internal successors, (7216), 41 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:58,420 INFO L175 Difference]: Start difference. First operand has 96 places, 116 transitions, 1613 flow. Second operand 40 states and 3246 transitions. [2023-09-01 12:44:58,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 488 transitions, 7190 flow [2023-09-01 12:44:58,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 488 transitions, 6883 flow, removed 145 selfloop flow, removed 5 redundant places. [2023-09-01 12:44:58,531 INFO L231 Difference]: Finished difference. Result has 143 places, 196 transitions, 3320 flow [2023-09-01 12:44:58,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3320, PETRI_PLACES=143, PETRI_TRANSITIONS=196} [2023-09-01 12:44:58,532 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2023-09-01 12:44:58,532 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 196 transitions, 3320 flow [2023-09-01 12:44:58,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 77.3529411764706) internal successors, (1315), 17 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:58,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:58,533 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] [2023-09-01 12:44:58,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 12:44:58,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 12:44:58,744 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:58,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:58,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1935321177, now seen corresponding path program 1 times [2023-09-01 12:44:58,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:58,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871416849] [2023-09-01 12:44:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:58,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:59,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:59,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871416849] [2023-09-01 12:44:59,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871416849] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:44:59,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293715023] [2023-09-01 12:44:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:59,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:44:59,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:44:59,198 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:44:59,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 12:44:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:59,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 12:44:59,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:44:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:59,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:44:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:59,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293715023] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:44:59,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:44:59,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2023-09-01 12:44:59,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414003214] [2023-09-01 12:44:59,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:44:59,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:44:59,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:59,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:44:59,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:45:00,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-09-01 12:45:00,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 196 transitions, 3320 flow. Second operand has 17 states, 17 states have (on average 72.88235294117646) internal successors, (1239), 17 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:00,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:00,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-09-01 12:45:00,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:02,158 INFO L130 PetriNetUnfolder]: 1556/2676 cut-off events. [2023-09-01 12:45:02,158 INFO L131 PetriNetUnfolder]: For 54921/54931 co-relation queries the response was YES. [2023-09-01 12:45:02,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21250 conditions, 2676 events. 1556/2676 cut-off events. For 54921/54931 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14609 event pairs, 30 based on Foata normal form. 84/2759 useless extension candidates. Maximal degree in co-relation 19355. Up to 841 conditions per place. [2023-09-01 12:45:02,192 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 229 selfloop transitions, 159 changer transitions 218/613 dead transitions. [2023-09-01 12:45:02,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 613 transitions, 10255 flow [2023-09-01 12:45:02,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 12:45:02,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 12:45:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3371 transitions. [2023-09-01 12:45:02,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353047520661157 [2023-09-01 12:45:02,198 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3371 transitions. [2023-09-01 12:45:02,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3371 transitions. [2023-09-01 12:45:02,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:02,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3371 transitions. [2023-09-01 12:45:02,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 76.61363636363636) internal successors, (3371), 44 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:02,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 176.0) internal successors, (7920), 45 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:02,216 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 176.0) internal successors, (7920), 45 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:02,216 INFO L175 Difference]: Start difference. First operand has 143 places, 196 transitions, 3320 flow. Second operand 44 states and 3371 transitions. [2023-09-01 12:45:02,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 613 transitions, 10255 flow [2023-09-01 12:45:02,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 613 transitions, 8567 flow, removed 787 selfloop flow, removed 14 redundant places. [2023-09-01 12:45:02,434 INFO L231 Difference]: Finished difference. Result has 184 places, 293 transitions, 4540 flow [2023-09-01 12:45:02,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4540, PETRI_PLACES=184, PETRI_TRANSITIONS=293} [2023-09-01 12:45:02,435 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2023-09-01 12:45:02,436 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 293 transitions, 4540 flow [2023-09-01 12:45:02,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 72.88235294117646) internal successors, (1239), 17 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:02,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:02,437 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:02,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 12:45:02,642 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,SelfDestructingSolverStorable11 [2023-09-01 12:45:02,643 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:02,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:02,643 INFO L85 PathProgramCache]: Analyzing trace with hash 641822062, now seen corresponding path program 2 times [2023-09-01 12:45:02,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:02,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458145039] [2023-09-01 12:45:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:02,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:02,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:02,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458145039] [2023-09-01 12:45:02,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458145039] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:02,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906364485] [2023-09-01 12:45:02,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:45:02,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:02,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:02,925 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:45:02,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 12:45:03,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:45:03,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:45:03,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 12:45:03,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:03,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:03,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906364485] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:03,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:03,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2023-09-01 12:45:03,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370580667] [2023-09-01 12:45:03,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:03,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 12:45:03,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:03,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 12:45:03,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-09-01 12:45:03,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 176 [2023-09-01 12:45:03,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 293 transitions, 4540 flow. Second operand has 16 states, 16 states have (on average 75.625) internal successors, (1210), 16 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:03,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:03,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 176 [2023-09-01 12:45:03,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:06,150 INFO L130 PetriNetUnfolder]: 1998/3373 cut-off events. [2023-09-01 12:45:06,150 INFO L131 PetriNetUnfolder]: For 58136/58136 co-relation queries the response was YES. [2023-09-01 12:45:06,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26150 conditions, 3373 events. 1998/3373 cut-off events. For 58136/58136 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18534 event pairs, 47 based on Foata normal form. 158/3531 useless extension candidates. Maximal degree in co-relation 25962. Up to 981 conditions per place. [2023-09-01 12:45:06,186 INFO L137 encePairwiseOnDemand]: 166/176 looper letters, 281 selfloop transitions, 201 changer transitions 246/728 dead transitions. [2023-09-01 12:45:06,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 728 transitions, 12477 flow [2023-09-01 12:45:06,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-09-01 12:45:06,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-09-01 12:45:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4720 transitions. [2023-09-01 12:45:06,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4396423248882265 [2023-09-01 12:45:06,197 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4720 transitions. [2023-09-01 12:45:06,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4720 transitions. [2023-09-01 12:45:06,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:06,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4720 transitions. [2023-09-01 12:45:06,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 77.37704918032787) internal successors, (4720), 61 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:06,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 176.0) internal successors, (10912), 62 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:06,288 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 176.0) internal successors, (10912), 62 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:06,288 INFO L175 Difference]: Start difference. First operand has 184 places, 293 transitions, 4540 flow. Second operand 61 states and 4720 transitions. [2023-09-01 12:45:06,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 728 transitions, 12477 flow [2023-09-01 12:45:06,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 728 transitions, 11330 flow, removed 562 selfloop flow, removed 25 redundant places. [2023-09-01 12:45:06,585 INFO L231 Difference]: Finished difference. Result has 239 places, 374 transitions, 6209 flow [2023-09-01 12:45:06,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=4058, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=6209, PETRI_PLACES=239, PETRI_TRANSITIONS=374} [2023-09-01 12:45:06,586 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2023-09-01 12:45:06,586 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 374 transitions, 6209 flow [2023-09-01 12:45:06,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.625) internal successors, (1210), 16 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:06,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:06,588 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:06,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 12:45:06,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:06,793 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:06,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:06,794 INFO L85 PathProgramCache]: Analyzing trace with hash 216840545, now seen corresponding path program 2 times [2023-09-01 12:45:06,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:06,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594528959] [2023-09-01 12:45:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:06,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:07,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:07,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594528959] [2023-09-01 12:45:07,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594528959] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:07,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818879527] [2023-09-01 12:45:07,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:45:07,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:07,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:07,294 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:45:07,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 12:45:07,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:45:07,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:45:07,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 12:45:07,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:07,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:08,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818879527] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:08,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:08,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-09-01 12:45:08,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005355559] [2023-09-01 12:45:08,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:08,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 12:45:08,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:08,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 12:45:08,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-09-01 12:45:08,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-09-01 12:45:08,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 374 transitions, 6209 flow. Second operand has 21 states, 21 states have (on average 72.52380952380952) internal successors, (1523), 21 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:08,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:08,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-09-01 12:45:08,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:10,797 INFO L130 PetriNetUnfolder]: 2590/4426 cut-off events. [2023-09-01 12:45:10,797 INFO L131 PetriNetUnfolder]: For 107915/107920 co-relation queries the response was YES. [2023-09-01 12:45:10,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36413 conditions, 4426 events. 2590/4426 cut-off events. For 107915/107920 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 25463 event pairs, 52 based on Foata normal form. 149/4575 useless extension candidates. Maximal degree in co-relation 35620. Up to 1319 conditions per place. [2023-09-01 12:45:10,846 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 305 selfloop transitions, 312 changer transitions 277/897 dead transitions. [2023-09-01 12:45:10,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 897 transitions, 16375 flow [2023-09-01 12:45:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-09-01 12:45:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-09-01 12:45:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4024 transitions. [2023-09-01 12:45:10,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43138936535162953 [2023-09-01 12:45:10,853 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4024 transitions. [2023-09-01 12:45:10,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4024 transitions. [2023-09-01 12:45:10,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:10,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4024 transitions. [2023-09-01 12:45:10,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 75.9245283018868) internal successors, (4024), 53 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:10,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 176.0) internal successors, (9504), 54 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:10,870 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 176.0) internal successors, (9504), 54 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:10,870 INFO L175 Difference]: Start difference. First operand has 239 places, 374 transitions, 6209 flow. Second operand 53 states and 4024 transitions. [2023-09-01 12:45:10,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 897 transitions, 16375 flow [2023-09-01 12:45:11,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 897 transitions, 13801 flow, removed 1035 selfloop flow, removed 41 redundant places. [2023-09-01 12:45:11,388 INFO L231 Difference]: Finished difference. Result has 235 places, 502 transitions, 8372 flow [2023-09-01 12:45:11,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=5397, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=8372, PETRI_PLACES=235, PETRI_TRANSITIONS=502} [2023-09-01 12:45:11,389 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2023-09-01 12:45:11,389 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 502 transitions, 8372 flow [2023-09-01 12:45:11,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 72.52380952380952) internal successors, (1523), 21 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:11,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:11,390 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:11,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 12:45:11,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:11,591 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:11,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:11,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1207528187, now seen corresponding path program 3 times [2023-09-01 12:45:11,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:11,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646337442] [2023-09-01 12:45:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:11,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:12,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:12,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646337442] [2023-09-01 12:45:12,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646337442] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:12,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277019005] [2023-09-01 12:45:12,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:45:12,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:12,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:12,241 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:45:12,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 12:45:12,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 12:45:12,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:45:12,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 12:45:12,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:12,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:45:13,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277019005] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:13,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:13,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2023-09-01 12:45:13,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527291071] [2023-09-01 12:45:13,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:13,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 12:45:13,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:13,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 12:45:13,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-09-01 12:45:13,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 176 [2023-09-01 12:45:13,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 502 transitions, 8372 flow. Second operand has 26 states, 26 states have (on average 68.53846153846153) internal successors, (1782), 26 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:13,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:13,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 176 [2023-09-01 12:45:13,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:16,944 INFO L130 PetriNetUnfolder]: 2615/4366 cut-off events. [2023-09-01 12:45:16,944 INFO L131 PetriNetUnfolder]: For 68799/68799 co-relation queries the response was YES. [2023-09-01 12:45:16,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34736 conditions, 4366 events. 2615/4366 cut-off events. For 68799/68799 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 23947 event pairs, 59 based on Foata normal form. 96/4462 useless extension candidates. Maximal degree in co-relation 34519. Up to 1341 conditions per place. [2023-09-01 12:45:16,991 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 362 selfloop transitions, 375 changer transitions 177/914 dead transitions. [2023-09-01 12:45:16,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 914 transitions, 15700 flow [2023-09-01 12:45:16,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-09-01 12:45:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-09-01 12:45:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 5130 transitions. [2023-09-01 12:45:17,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40482954545454547 [2023-09-01 12:45:17,001 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 5130 transitions. [2023-09-01 12:45:17,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 5130 transitions. [2023-09-01 12:45:17,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:17,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 5130 transitions. [2023-09-01 12:45:17,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 71.25) internal successors, (5130), 72 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:17,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 176.0) internal successors, (12848), 73 states have internal predecessors, (12848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:17,026 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 176.0) internal successors, (12848), 73 states have internal predecessors, (12848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:17,026 INFO L175 Difference]: Start difference. First operand has 235 places, 502 transitions, 8372 flow. Second operand 72 states and 5130 transitions. [2023-09-01 12:45:17,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 914 transitions, 15700 flow [2023-09-01 12:45:17,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 914 transitions, 14440 flow, removed 495 selfloop flow, removed 29 redundant places. [2023-09-01 12:45:17,549 INFO L231 Difference]: Finished difference. Result has 284 places, 591 transitions, 10286 flow [2023-09-01 12:45:17,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=7661, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=10286, PETRI_PLACES=284, PETRI_TRANSITIONS=591} [2023-09-01 12:45:17,549 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2023-09-01 12:45:17,550 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 591 transitions, 10286 flow [2023-09-01 12:45:17,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 68.53846153846153) internal successors, (1782), 26 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:17,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:17,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:17,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 12:45:17,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 12:45:17,756 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:17,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:17,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1794503256, now seen corresponding path program 4 times [2023-09-01 12:45:17,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:17,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10742362] [2023-09-01 12:45:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:17,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:18,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:18,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10742362] [2023-09-01 12:45:18,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10742362] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:18,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189708327] [2023-09-01 12:45:18,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:45:18,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:18,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:18,228 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:45:18,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 12:45:18,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:45:18,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:45:18,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 12:45:18,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:18,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:18,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189708327] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:18,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:18,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 23 [2023-09-01 12:45:18,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128232508] [2023-09-01 12:45:18,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:19,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 12:45:19,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:19,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 12:45:19,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-09-01 12:45:19,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-09-01 12:45:19,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 591 transitions, 10286 flow. Second operand has 24 states, 24 states have (on average 72.45833333333333) internal successors, (1739), 24 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:19,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:19,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-09-01 12:45:19,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:24,282 INFO L130 PetriNetUnfolder]: 5091/8635 cut-off events. [2023-09-01 12:45:24,282 INFO L131 PetriNetUnfolder]: For 155622/155624 co-relation queries the response was YES. [2023-09-01 12:45:24,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74300 conditions, 8635 events. 5091/8635 cut-off events. For 155622/155624 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 56200 event pairs, 52 based on Foata normal form. 304/8937 useless extension candidates. Maximal degree in co-relation 73669. Up to 2583 conditions per place. [2023-09-01 12:45:24,372 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 397 selfloop transitions, 828 changer transitions 553/1788 dead transitions. [2023-09-01 12:45:24,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1788 transitions, 35094 flow [2023-09-01 12:45:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-09-01 12:45:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2023-09-01 12:45:24,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 7617 transitions. [2023-09-01 12:45:24,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428499099909991 [2023-09-01 12:45:24,382 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 7617 transitions. [2023-09-01 12:45:24,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 7617 transitions. [2023-09-01 12:45:24,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:24,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 7617 transitions. [2023-09-01 12:45:24,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 75.41584158415841) internal successors, (7617), 101 states have internal predecessors, (7617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:24,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 176.0) internal successors, (17952), 102 states have internal predecessors, (17952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:24,410 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 176.0) internal successors, (17952), 102 states have internal predecessors, (17952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:24,410 INFO L175 Difference]: Start difference. First operand has 284 places, 591 transitions, 10286 flow. Second operand 101 states and 7617 transitions. [2023-09-01 12:45:24,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1788 transitions, 35094 flow [2023-09-01 12:45:25,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1788 transitions, 32014 flow, removed 1300 selfloop flow, removed 38 redundant places. [2023-09-01 12:45:25,931 INFO L231 Difference]: Finished difference. Result has 361 places, 978 transitions, 18839 flow [2023-09-01 12:45:25,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=9186, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=441, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=18839, PETRI_PLACES=361, PETRI_TRANSITIONS=978} [2023-09-01 12:45:25,932 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 331 predicate places. [2023-09-01 12:45:25,932 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 978 transitions, 18839 flow [2023-09-01 12:45:25,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 72.45833333333333) internal successors, (1739), 24 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:25,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:25,933 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:25,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 12:45:26,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 12:45:26,139 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:26,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:26,140 INFO L85 PathProgramCache]: Analyzing trace with hash 917495554, now seen corresponding path program 5 times [2023-09-01 12:45:26,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:26,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367275068] [2023-09-01 12:45:26,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:26,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:26,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:26,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367275068] [2023-09-01 12:45:26,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367275068] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:26,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717019887] [2023-09-01 12:45:26,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:45:26,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:26,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:26,745 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) [2023-09-01 12:45:26,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 12:45:26,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 12:45:26,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:45:26,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 12:45:26,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:27,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:27,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717019887] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:27,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:27,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-09-01 12:45:27,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66454731] [2023-09-01 12:45:27,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:27,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 12:45:27,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:27,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 12:45:27,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2023-09-01 12:45:27,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-09-01 12:45:27,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 978 transitions, 18839 flow. Second operand has 26 states, 26 states have (on average 72.26923076923077) internal successors, (1879), 26 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:27,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:27,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-09-01 12:45:27,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:37,463 INFO L130 PetriNetUnfolder]: 10634/18130 cut-off events. [2023-09-01 12:45:37,463 INFO L131 PetriNetUnfolder]: For 370831/370834 co-relation queries the response was YES. [2023-09-01 12:45:37,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164413 conditions, 18130 events. 10634/18130 cut-off events. For 370831/370834 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 132820 event pairs, 174 based on Foata normal form. 427/18557 useless extension candidates. Maximal degree in co-relation 164067. Up to 4993 conditions per place. [2023-09-01 12:45:37,655 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 854 selfloop transitions, 1788 changer transitions 551/3203 dead transitions. [2023-09-01 12:45:37,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 3203 transitions, 68031 flow [2023-09-01 12:45:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-09-01 12:45:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2023-09-01 12:45:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 9354 transitions. [2023-09-01 12:45:37,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4286107038123167 [2023-09-01 12:45:37,668 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 9354 transitions. [2023-09-01 12:45:37,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 9354 transitions. [2023-09-01 12:45:37,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:37,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 9354 transitions. [2023-09-01 12:45:37,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 75.43548387096774) internal successors, (9354), 124 states have internal predecessors, (9354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:37,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 176.0) internal successors, (22000), 125 states have internal predecessors, (22000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:37,701 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 176.0) internal successors, (22000), 125 states have internal predecessors, (22000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:37,701 INFO L175 Difference]: Start difference. First operand has 361 places, 978 transitions, 18839 flow. Second operand 124 states and 9354 transitions. [2023-09-01 12:45:37,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 3203 transitions, 68031 flow [2023-09-01 12:45:45,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 3203 transitions, 57701 flow, removed 4100 selfloop flow, removed 42 redundant places. [2023-09-01 12:45:45,505 INFO L231 Difference]: Finished difference. Result has 461 places, 2282 transitions, 45651 flow [2023-09-01 12:45:45,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=16379, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=686, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=45651, PETRI_PLACES=461, PETRI_TRANSITIONS=2282} [2023-09-01 12:45:45,506 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 431 predicate places. [2023-09-01 12:45:45,506 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 2282 transitions, 45651 flow [2023-09-01 12:45:45,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 72.26923076923077) internal successors, (1879), 26 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:45,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:45,506 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:45,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-09-01 12:45:45,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:45,707 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:45,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:45,708 INFO L85 PathProgramCache]: Analyzing trace with hash 734606202, now seen corresponding path program 6 times [2023-09-01 12:45:45,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:45,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447303262] [2023-09-01 12:45:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:45,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:46,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:46,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447303262] [2023-09-01 12:45:46,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447303262] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:46,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241357737] [2023-09-01 12:45:46,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:45:46,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:46,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:46,345 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:45:46,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 12:45:46,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 12:45:46,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:45:46,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 12:45:46,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:46,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:47,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241357737] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:47,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:47,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-09-01 12:45:47,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063187869] [2023-09-01 12:45:47,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:47,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 12:45:47,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:47,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 12:45:47,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:45:47,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 176 [2023-09-01 12:45:47,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 2282 transitions, 45651 flow. Second operand has 25 states, 25 states have (on average 69.64) internal successors, (1741), 25 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:47,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:47,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 176 [2023-09-01 12:45:47,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:46:00,412 INFO L130 PetriNetUnfolder]: 12844/21841 cut-off events. [2023-09-01 12:46:00,413 INFO L131 PetriNetUnfolder]: For 392636/392636 co-relation queries the response was YES. [2023-09-01 12:46:00,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194036 conditions, 21841 events. 12844/21841 cut-off events. For 392636/392636 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 164585 event pairs, 321 based on Foata normal form. 448/22289 useless extension candidates. Maximal degree in co-relation 193843. Up to 8660 conditions per place. [2023-09-01 12:46:00,820 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 1884 selfloop transitions, 1274 changer transitions 528/3686 dead transitions. [2023-09-01 12:46:00,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 3686 transitions, 79623 flow [2023-09-01 12:46:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-09-01 12:46:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2023-09-01 12:46:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 6679 transitions. [2023-09-01 12:46:00,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41248764822134387 [2023-09-01 12:46:00,828 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 6679 transitions. [2023-09-01 12:46:00,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 6679 transitions. [2023-09-01 12:46:00,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:46:00,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 6679 transitions. [2023-09-01 12:46:00,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 72.59782608695652) internal successors, (6679), 92 states have internal predecessors, (6679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:00,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 176.0) internal successors, (16368), 93 states have internal predecessors, (16368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:00,850 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 176.0) internal successors, (16368), 93 states have internal predecessors, (16368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:00,850 INFO L175 Difference]: Start difference. First operand has 461 places, 2282 transitions, 45651 flow. Second operand 92 states and 6679 transitions. [2023-09-01 12:46:00,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 3686 transitions, 79623 flow [2023-09-01 12:46:16,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 3686 transitions, 76931 flow, removed 1270 selfloop flow, removed 49 redundant places. [2023-09-01 12:46:16,674 INFO L231 Difference]: Finished difference. Result has 523 places, 2890 transitions, 61182 flow [2023-09-01 12:46:16,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=43910, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=754, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=61182, PETRI_PLACES=523, PETRI_TRANSITIONS=2890} [2023-09-01 12:46:16,676 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 493 predicate places. [2023-09-01 12:46:16,676 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 2890 transitions, 61182 flow [2023-09-01 12:46:16,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 69.64) internal successors, (1741), 25 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:16,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:46:16,677 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:46:16,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 12:46:16,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 12:46:16,878 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:46:16,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:46:16,878 INFO L85 PathProgramCache]: Analyzing trace with hash 729794018, now seen corresponding path program 7 times [2023-09-01 12:46:16,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:46:16,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384063284] [2023-09-01 12:46:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:46:16,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:46:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:46:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:17,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:46:17,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384063284] [2023-09-01 12:46:17,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384063284] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:46:17,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077794104] [2023-09-01 12:46:17,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:46:17,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:46:17,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:46:17,494 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:46:17,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 12:46:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:46:17,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 12:46:17,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:46:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:18,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:46:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:18,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077794104] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:46:18,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:46:18,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2023-09-01 12:46:18,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239207301] [2023-09-01 12:46:18,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:46:18,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:46:18,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:46:18,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:46:18,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-09-01 12:46:18,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 176 [2023-09-01 12:46:18,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 2890 transitions, 61182 flow. Second operand has 30 states, 30 states have (on average 67.9) internal successors, (2037), 30 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:18,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:46:18,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 176 [2023-09-01 12:46:18,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:46:42,208 INFO L130 PetriNetUnfolder]: 17137/29428 cut-off events. [2023-09-01 12:46:42,208 INFO L131 PetriNetUnfolder]: For 920114/920114 co-relation queries the response was YES. [2023-09-01 12:46:42,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288487 conditions, 29428 events. 17137/29428 cut-off events. For 920114/920114 co-relation queries the response was YES. Maximal size of possible extension queue 1198. Compared 235352 event pairs, 308 based on Foata normal form. 658/30086 useless extension candidates. Maximal degree in co-relation 288079. Up to 8172 conditions per place. [2023-09-01 12:46:42,772 INFO L137 encePairwiseOnDemand]: 166/176 looper letters, 1799 selfloop transitions, 2492 changer transitions 775/5066 dead transitions. [2023-09-01 12:46:42,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 5066 transitions, 115675 flow [2023-09-01 12:46:42,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2023-09-01 12:46:42,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2023-09-01 12:46:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 10729 transitions. [2023-09-01 12:46:42,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064015151515151 [2023-09-01 12:46:42,783 INFO L72 ComplementDD]: Start complementDD. Operand 150 states and 10729 transitions. [2023-09-01 12:46:42,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 10729 transitions. [2023-09-01 12:46:42,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:46:42,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 150 states and 10729 transitions. [2023-09-01 12:46:42,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 151 states, 150 states have (on average 71.52666666666667) internal successors, (10729), 150 states have internal predecessors, (10729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:42,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 151 states, 151 states have (on average 176.0) internal successors, (26576), 151 states have internal predecessors, (26576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:42,817 INFO L81 ComplementDD]: Finished complementDD. Result has 151 states, 151 states have (on average 176.0) internal successors, (26576), 151 states have internal predecessors, (26576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:42,817 INFO L175 Difference]: Start difference. First operand has 523 places, 2890 transitions, 61182 flow. Second operand 150 states and 10729 transitions. [2023-09-01 12:46:42,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 5066 transitions, 115675 flow [2023-09-01 12:47:13,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 5066 transitions, 112180 flow, removed 1701 selfloop flow, removed 45 redundant places. [2023-09-01 12:47:13,315 INFO L231 Difference]: Finished difference. Result has 677 places, 3881 transitions, 91180 flow [2023-09-01 12:47:13,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=59951, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1614, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=991, PETRI_DIFFERENCE_SUBTRAHEND_STATES=150, PETRI_FLOW=91180, PETRI_PLACES=677, PETRI_TRANSITIONS=3881} [2023-09-01 12:47:13,318 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 647 predicate places. [2023-09-01 12:47:13,318 INFO L495 AbstractCegarLoop]: Abstraction has has 677 places, 3881 transitions, 91180 flow [2023-09-01 12:47:13,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 67.9) internal successors, (2037), 30 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:13,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:47:13,319 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:47:13,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-09-01 12:47:13,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:47:13,524 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:47:13,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:47:13,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2138623070, now seen corresponding path program 8 times [2023-09-01 12:47:13,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:47:13,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061773802] [2023-09-01 12:47:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:47:13,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:47:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:47:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:47:14,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:47:14,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061773802] [2023-09-01 12:47:14,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061773802] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:47:14,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829942125] [2023-09-01 12:47:14,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:47:14,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:47:14,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:47:14,072 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:47:14,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 12:47:14,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:47:14,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:47:14,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 12:47:14,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:47:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:47:14,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:47:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:47:14,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829942125] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:47:14,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:47:14,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-09-01 12:47:14,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844979867] [2023-09-01 12:47:14,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:47:14,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 12:47:14,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:47:14,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 12:47:14,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2023-09-01 12:47:15,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-09-01 12:47:15,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 3881 transitions, 91180 flow. Second operand has 26 states, 26 states have (on average 72.34615384615384) internal successors, (1881), 26 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:15,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:47:15,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-09-01 12:47:15,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:48:04,069 INFO L130 PetriNetUnfolder]: 28693/49585 cut-off events. [2023-09-01 12:48:04,070 INFO L131 PetriNetUnfolder]: For 2949205/2949207 co-relation queries the response was YES. [2023-09-01 12:48:05,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571897 conditions, 49585 events. 28693/49585 cut-off events. For 2949205/2949207 co-relation queries the response was YES. Maximal size of possible extension queue 2166. Compared 434078 event pairs, 708 based on Foata normal form. 1454/51037 useless extension candidates. Maximal degree in co-relation 571424. Up to 12135 conditions per place. [2023-09-01 12:48:05,758 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 2792 selfloop transitions, 3595 changer transitions 2027/8424 dead transitions. [2023-09-01 12:48:05,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 779 places, 8424 transitions, 217806 flow [2023-09-01 12:48:05,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2023-09-01 12:48:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2023-09-01 12:48:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 12929 transitions. [2023-09-01 12:48:05,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42959197235513025 [2023-09-01 12:48:05,800 INFO L72 ComplementDD]: Start complementDD. Operand 171 states and 12929 transitions. [2023-09-01 12:48:05,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 171 states and 12929 transitions. [2023-09-01 12:48:05,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:48:05,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 171 states and 12929 transitions. [2023-09-01 12:48:05,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 172 states, 171 states have (on average 75.60818713450293) internal successors, (12929), 171 states have internal predecessors, (12929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:48:05,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 172 states, 172 states have (on average 176.0) internal successors, (30272), 172 states have internal predecessors, (30272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:48:05,843 INFO L81 ComplementDD]: Finished complementDD. Result has 172 states, 172 states have (on average 176.0) internal successors, (30272), 172 states have internal predecessors, (30272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:48:05,843 INFO L175 Difference]: Start difference. First operand has 677 places, 3881 transitions, 91180 flow. Second operand 171 states and 12929 transitions. [2023-09-01 12:48:05,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 779 places, 8424 transitions, 217806 flow [2023-09-01 12:50:14,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 699 places, 8424 transitions, 208378 flow, removed 4636 selfloop flow, removed 80 redundant places. [2023-09-01 12:50:14,583 INFO L231 Difference]: Finished difference. Result has 806 places, 5934 transitions, 150852 flow [2023-09-01 12:50:14,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=88463, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1840, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=171, PETRI_FLOW=150852, PETRI_PLACES=806, PETRI_TRANSITIONS=5934} [2023-09-01 12:50:14,586 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 776 predicate places. [2023-09-01 12:50:14,586 INFO L495 AbstractCegarLoop]: Abstraction has has 806 places, 5934 transitions, 150852 flow [2023-09-01 12:50:14,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 72.34615384615384) internal successors, (1881), 26 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:50:14,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:50:14,587 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:50:14,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 12:50:14,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:50:14,787 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:50:14,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:50:14,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1553467846, now seen corresponding path program 9 times [2023-09-01 12:50:14,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:50:14,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520397271] [2023-09-01 12:50:14,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:50:14,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:50:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:50:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:50:15,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:50:15,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520397271] [2023-09-01 12:50:15,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520397271] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:50:15,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897439147] [2023-09-01 12:50:15,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:50:15,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:50:15,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:50:15,245 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:50:15,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 12:50:15,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 12:50:15,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:50:15,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 12:50:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:50:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:50:15,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:50:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:50:15,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897439147] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:50:15,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:50:15,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-09-01 12:50:15,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789992765] [2023-09-01 12:50:15,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:50:15,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 12:50:15,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:50:15,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 12:50:15,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:50:16,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 176 [2023-09-01 12:50:16,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 806 places, 5934 transitions, 150852 flow. Second operand has 25 states, 25 states have (on average 69.64) internal successors, (1741), 25 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:50:16,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:50:16,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 176 [2023-09-01 12:50:16,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:51:24,686 INFO L130 PetriNetUnfolder]: 31584/54305 cut-off events. [2023-09-01 12:51:24,687 INFO L131 PetriNetUnfolder]: For 1738462/1738462 co-relation queries the response was YES. [2023-09-01 12:51:26,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601862 conditions, 54305 events. 31584/54305 cut-off events. For 1738462/1738462 co-relation queries the response was YES. Maximal size of possible extension queue 2222. Compared 476804 event pairs, 1001 based on Foata normal form. 792/55097 useless extension candidates. Maximal degree in co-relation 601487. Up to 22152 conditions per place. [2023-09-01 12:51:26,944 INFO L137 encePairwiseOnDemand]: 167/176 looper letters, 4606 selfloop transitions, 3058 changer transitions 843/8507 dead transitions. [2023-09-01 12:51:26,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 8507 transitions, 236681 flow [2023-09-01 12:51:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-09-01 12:51:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-09-01 12:51:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 5151 transitions. [2023-09-01 12:51:26,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122119078104994 [2023-09-01 12:51:26,948 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 5151 transitions. [2023-09-01 12:51:26,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 5151 transitions. [2023-09-01 12:51:26,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:51:26,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 5151 transitions. [2023-09-01 12:51:26,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 72.54929577464789) internal successors, (5151), 71 states have internal predecessors, (5151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:26,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 176.0) internal successors, (12672), 72 states have internal predecessors, (12672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:26,962 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 176.0) internal successors, (12672), 72 states have internal predecessors, (12672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:26,963 INFO L175 Difference]: Start difference. First operand has 806 places, 5934 transitions, 150852 flow. Second operand 71 states and 5151 transitions. [2023-09-01 12:51:26,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 8507 transitions, 236681 flow [2023-09-01 12:54:27,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 8507 transitions, 227761 flow, removed 4228 selfloop flow, removed 82 redundant places. [2023-09-01 12:54:27,414 INFO L231 Difference]: Finished difference. Result has 763 places, 7250 transitions, 191879 flow [2023-09-01 12:54:27,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=145078, PETRI_DIFFERENCE_MINUEND_PLACES=644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5933, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=191879, PETRI_PLACES=763, PETRI_TRANSITIONS=7250} [2023-09-01 12:54:27,418 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 733 predicate places. [2023-09-01 12:54:27,418 INFO L495 AbstractCegarLoop]: Abstraction has has 763 places, 7250 transitions, 191879 flow [2023-09-01 12:54:27,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 69.64) internal successors, (1741), 25 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:54:27,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:54:27,419 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:54:27,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 12:54:27,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-09-01 12:54:27,619 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:54:27,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:54:27,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1898947804, now seen corresponding path program 10 times [2023-09-01 12:54:27,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:54:27,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578222443] [2023-09-01 12:54:27,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:54:27,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:54:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:54:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:54:28,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:54:28,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578222443] [2023-09-01 12:54:28,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578222443] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:54:28,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357668484] [2023-09-01 12:54:28,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:54:28,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:54:28,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:54:28,209 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:54:28,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 12:54:28,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:54:28,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:54:28,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 12:54:28,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:54:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:54:28,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:54:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:54:28,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357668484] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:54:28,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:54:28,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-09-01 12:54:28,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578425172] [2023-09-01 12:54:28,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:54:28,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 12:54:28,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:54:28,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 12:54:28,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2023-09-01 12:54:29,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 176 [2023-09-01 12:54:29,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 763 places, 7250 transitions, 191879 flow. Second operand has 26 states, 26 states have (on average 72.26923076923077) internal successors, (1879), 26 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:54:29,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:54:29,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 176 [2023-09-01 12:54:29,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:56:46,272 INFO L130 PetriNetUnfolder]: 46563/80913 cut-off events. [2023-09-01 12:56:46,273 INFO L131 PetriNetUnfolder]: For 2946008/2946013 co-relation queries the response was YES. [2023-09-01 12:56:49,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 918404 conditions, 80913 events. 46563/80913 cut-off events. For 2946008/2946013 co-relation queries the response was YES. Maximal size of possible extension queue 3521. Compared 764498 event pairs, 1234 based on Foata normal form. 1801/82714 useless extension candidates. Maximal degree in co-relation 916300. Up to 23220 conditions per place. [2023-09-01 12:56:49,873 INFO L137 encePairwiseOnDemand]: 168/176 looper letters, 4901 selfloop transitions, 5241 changer transitions 2470/12625 dead transitions. [2023-09-01 12:56:49,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 12625 transitions, 363547 flow [2023-09-01 12:56:49,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2023-09-01 12:56:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2023-09-01 12:56:49,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 12137 transitions. [2023-09-01 12:56:49,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310014204545455 [2023-09-01 12:56:49,887 INFO L72 ComplementDD]: Start complementDD. Operand 160 states and 12137 transitions. [2023-09-01 12:56:49,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 160 states and 12137 transitions. [2023-09-01 12:56:49,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:56:49,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 160 states and 12137 transitions. [2023-09-01 12:56:49,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 161 states, 160 states have (on average 75.85625) internal successors, (12137), 160 states have internal predecessors, (12137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:49,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 161 states, 161 states have (on average 176.0) internal successors, (28336), 161 states have internal predecessors, (28336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:49,919 INFO L81 ComplementDD]: Finished complementDD. Result has 161 states, 161 states have (on average 176.0) internal successors, (28336), 161 states have internal predecessors, (28336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:49,920 INFO L175 Difference]: Start difference. First operand has 763 places, 7250 transitions, 191879 flow. Second operand 160 states and 12137 transitions. [2023-09-01 12:56:49,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 12625 transitions, 363547 flow Killed by 15