./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/queue_ok_longest.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/pthread/queue_ok_longest.i -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 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 16:10:41,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:10:41,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:10:41,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:10:41,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:10:41,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:10:41,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:10:41,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:10:41,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:10:41,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:10:41,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:10:41,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:10:41,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:10:41,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:10:41,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:10:41,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:10:41,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:10:41,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:10:41,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:10:41,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:10:41,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:10:41,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:10:41,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:10:41,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:10:41,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:10:41,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:10:41,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:10:41,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:10:41,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:10:41,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:10:41,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:10:41,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:10:41,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:10:41,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:10:41,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:10:41,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:10:41,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:10:41,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:10:41,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:10:41,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:10:41,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:10:41,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:10:41,272 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:10:41,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:10:41,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:10:41,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:10:41,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:10:41,273 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:10:41,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:10:41,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:10:41,274 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:10:41,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:10:41,274 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:10:41,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:10:41,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:10:41,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:10:41,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:10:41,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:10:41,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:10:41,275 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:10:41,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:10:41,276 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:10:41,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:10:41,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:10:41,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:10:41,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:10:41,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:10:41,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:10:41,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:10:41,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:10:41,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:10:41,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:10:41,279 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:10:41,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:10:41,279 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:10:41,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:10:41,280 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:10:41,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:10:41,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:10:41,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:10:41,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:10:41,505 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:10:41,505 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:10:41,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_ok_longest.i [2023-08-30 16:10:42,500 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:10:42,752 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:10:42,766 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i [2023-08-30 16:10:42,779 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f41dea57c/a406d1a9d1a2400f85d4e9268e7c8f95/FLAG95acd35c2 [2023-08-30 16:10:42,793 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f41dea57c/a406d1a9d1a2400f85d4e9268e7c8f95 [2023-08-30 16:10:42,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:10:42,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:10:42,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:10:42,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:10:42,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:10:42,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:10:42" (1/1) ... [2023-08-30 16:10:42,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72dcd9d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:42, skipping insertion in model container [2023-08-30 16:10:42,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:10:42" (1/1) ... [2023-08-30 16:10:42,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:10:42,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:10:43,074 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43280,43293] [2023-08-30 16:10:43,079 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43553,43566] [2023-08-30 16:10:43,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:10:43,091 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:10:43,128 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43280,43293] [2023-08-30 16:10:43,134 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longest.i[43553,43566] [2023-08-30 16:10:43,139 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:10:43,195 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:10:43,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:43 WrapperNode [2023-08-30 16:10:43,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:10:43,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:10:43,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:10:43,197 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:10:43,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:43" (1/1) ... [2023-08-30 16:10:43,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:43" (1/1) ... [2023-08-30 16:10:43,253 INFO L138 Inliner]: procedures = 274, calls = 57, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 203 [2023-08-30 16:10:43,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:10:43,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:10:43,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:10:43,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:10:43,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:43" (1/1) ... [2023-08-30 16:10:43,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:43" (1/1) ... [2023-08-30 16:10:43,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:43" (1/1) ... [2023-08-30 16:10:43,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:43" (1/1) ... [2023-08-30 16:10:43,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:43" (1/1) ... [2023-08-30 16:10:43,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:43" (1/1) ... [2023-08-30 16:10:43,290 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:43" (1/1) ... [2023-08-30 16:10:43,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:43" (1/1) ... [2023-08-30 16:10:43,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:10:43,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:10:43,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:10:43,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:10:43,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:43" (1/1) ... [2023-08-30 16:10:43,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:10:43,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:10:43,337 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 16:10:43,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 16:10:43,360 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 16:10:43,361 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 16:10:43,362 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 16:10:43,362 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 16:10:43,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:10:43,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:10:43,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 16:10:43,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:10:43,362 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 16:10:43,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:10:43,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:10:43,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:10:43,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:10:43,364 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 16:10:43,523 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:10:43,525 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:10:43,773 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:10:43,779 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:10:43,784 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 16:10:43,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:10:43 BoogieIcfgContainer [2023-08-30 16:10:43,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:10:43,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:10:43,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:10:43,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:10:43,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:10:42" (1/3) ... [2023-08-30 16:10:43,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78959467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:10:43, skipping insertion in model container [2023-08-30 16:10:43,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:43" (2/3) ... [2023-08-30 16:10:43,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78959467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:10:43, skipping insertion in model container [2023-08-30 16:10:43,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:10:43" (3/3) ... [2023-08-30 16:10:43,793 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longest.i [2023-08-30 16:10:43,799 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:10:43,806 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:10:43,806 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 16:10:43,806 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:10:43,915 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 16:10:43,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 216 transitions, 448 flow [2023-08-30 16:10:44,048 INFO L130 PetriNetUnfolder]: 13/214 cut-off events. [2023-08-30 16:10:44,048 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:10:44,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 214 events. 13/214 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 359 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 141. Up to 3 conditions per place. [2023-08-30 16:10:44,054 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 216 transitions, 448 flow [2023-08-30 16:10:44,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 205 transitions, 419 flow [2023-08-30 16:10:44,068 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:10:44,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 205 transitions, 419 flow [2023-08-30 16:10:44,084 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 205 transitions, 419 flow [2023-08-30 16:10:44,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 205 transitions, 419 flow [2023-08-30 16:10:44,137 INFO L130 PetriNetUnfolder]: 13/205 cut-off events. [2023-08-30 16:10:44,138 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:10:44,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 205 events. 13/205 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 293 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 141. Up to 3 conditions per place. [2023-08-30 16:10:44,142 INFO L119 LiptonReduction]: Number of co-enabled transitions 9984 [2023-08-30 16:10:50,279 INFO L134 LiptonReduction]: Checked pairs total: 19772 [2023-08-30 16:10:50,280 INFO L136 LiptonReduction]: Total number of compositions: 186 [2023-08-30 16:10:50,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:10:50,304 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;@768fd3ca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:10:50,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 16:10:50,305 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 16:10:50,305 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:10:50,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:10:50,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 16:10:50,306 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 2 more)] === [2023-08-30 16:10:50,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:10:50,314 INFO L85 PathProgramCache]: Analyzing trace with hash 839, now seen corresponding path program 1 times [2023-08-30 16:10:50,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:10:50,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224860122] [2023-08-30 16:10:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:10:50,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:10:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:10:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:10:50,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:10:50,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224860122] [2023-08-30 16:10:50,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224860122] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:10:50,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:10:50,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 16:10:50,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084292054] [2023-08-30 16:10:50,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:10:50,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:10:50,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:10:50,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:10:50,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:10:50,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 402 [2023-08-30 16:10:50,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 103 flow. Second operand has 2 states, 2 states have (on average 205.5) internal successors, (411), 2 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:50,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:10:50,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 402 [2023-08-30 16:10:50,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:10:50,581 INFO L130 PetriNetUnfolder]: 829/1341 cut-off events. [2023-08-30 16:10:50,581 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2023-08-30 16:10:50,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 1341 events. 829/1341 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5736 event pairs, 621 based on Foata normal form. 0/1143 useless extension candidates. Maximal degree in co-relation 2519. Up to 1297 conditions per place. [2023-08-30 16:10:50,589 INFO L137 encePairwiseOnDemand]: 401/402 looper letters, 38 selfloop transitions, 0 changer transitions 1/46 dead transitions. [2023-08-30 16:10:50,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 179 flow [2023-08-30 16:10:50,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 16:10:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 16:10:50,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 450 transitions. [2023-08-30 16:10:50,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597014925373134 [2023-08-30 16:10:50,605 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 450 transitions. [2023-08-30 16:10:50,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 450 transitions. [2023-08-30 16:10:50,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:10:50,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 450 transitions. [2023-08-30 16:10:50,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 225.0) internal successors, (450), 2 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:50,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 402.0) internal successors, (1206), 3 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:50,615 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 402.0) internal successors, (1206), 3 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:50,616 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 103 flow. Second operand 2 states and 450 transitions. [2023-08-30 16:10:50,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 179 flow [2023-08-30 16:10:50,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 16:10:50,620 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-30 16:10:50,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-30 16:10:50,623 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-08-30 16:10:50,623 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-30 16:10:50,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 205.5) internal successors, (411), 2 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:50,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:10:50,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:10:50,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:10:50,625 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 16:10:50,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:10:50,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1319934340, now seen corresponding path program 1 times [2023-08-30 16:10:50,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:10:50,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236011386] [2023-08-30 16:10:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:10:50,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:10:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:10:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:10:50,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:10:50,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236011386] [2023-08-30 16:10:50,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236011386] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:10:50,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:10:50,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:10:50,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302912808] [2023-08-30 16:10:50,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:10:50,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:10:50,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:10:50,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:10:50,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:10:50,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 402 [2023-08-30 16:10:50,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 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) [2023-08-30 16:10:50,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:10:50,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 402 [2023-08-30 16:10:50,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:10:50,950 INFO L130 PetriNetUnfolder]: 197/403 cut-off events. [2023-08-30 16:10:50,950 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 16:10:50,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 811 conditions, 403 events. 197/403 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1584 event pairs, 125 based on Foata normal form. 28/391 useless extension candidates. Maximal degree in co-relation 808. Up to 193 conditions per place. [2023-08-30 16:10:50,951 INFO L137 encePairwiseOnDemand]: 398/402 looper letters, 40 selfloop transitions, 2 changer transitions 5/52 dead transitions. [2023-08-30 16:10:50,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 203 flow [2023-08-30 16:10:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:10:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:10:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2023-08-30 16:10:50,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364842454394693 [2023-08-30 16:10:50,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2023-08-30 16:10:50,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2023-08-30 16:10:50,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:10:50,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2023-08-30 16:10:50,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:50,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:50,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:50,958 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 647 transitions. [2023-08-30 16:10:50,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 203 flow [2023-08-30 16:10:50,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 203 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:10:50,959 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 98 flow [2023-08-30 16:10:50,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-08-30 16:10:50,960 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2023-08-30 16:10:50,960 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 98 flow [2023-08-30 16:10:50,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 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) [2023-08-30 16:10:50,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:10:50,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:10:50,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:10:50,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 16:10:50,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:10:50,961 INFO L85 PathProgramCache]: Analyzing trace with hash -312369892, now seen corresponding path program 1 times [2023-08-30 16:10:50,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:10:50,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81953803] [2023-08-30 16:10:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:10:50,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:10:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:10:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:10:51,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:10:51,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81953803] [2023-08-30 16:10:51,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81953803] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:10:51,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:10:51,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:10:51,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489069853] [2023-08-30 16:10:51,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:10:51,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:10:51,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:10:51,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:10:51,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:10:51,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 402 [2023-08-30 16:10:51,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:51,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:10:51,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 402 [2023-08-30 16:10:51,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:10:51,112 INFO L130 PetriNetUnfolder]: 245/498 cut-off events. [2023-08-30 16:10:51,112 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 16:10:51,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 498 events. 245/498 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1823 event pairs, 155 based on Foata normal form. 0/460 useless extension candidates. Maximal degree in co-relation 1028. Up to 357 conditions per place. [2023-08-30 16:10:51,114 INFO L137 encePairwiseOnDemand]: 398/402 looper letters, 48 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-30 16:10:51,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 57 transitions, 230 flow [2023-08-30 16:10:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:10:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:10:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-08-30 16:10:51,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543117744610282 [2023-08-30 16:10:51,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-08-30 16:10:51,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-08-30 16:10:51,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:10:51,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-08-30 16:10:51,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:51,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:51,120 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:51,121 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 98 flow. Second operand 3 states and 655 transitions. [2023-08-30 16:10:51,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 57 transitions, 230 flow [2023-08-30 16:10:51,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:10:51,122 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 113 flow [2023-08-30 16:10:51,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-08-30 16:10:51,122 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2023-08-30 16:10:51,123 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 113 flow [2023-08-30 16:10:51,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:51,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:10:51,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:10:51,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:10:51,123 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 16:10:51,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:10:51,124 INFO L85 PathProgramCache]: Analyzing trace with hash -824947493, now seen corresponding path program 1 times [2023-08-30 16:10:51,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:10:51,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068574001] [2023-08-30 16:10:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:10:51,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:10:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:10:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:10:51,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:10:51,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068574001] [2023-08-30 16:10:51,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068574001] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:10:51,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:10:51,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:10:51,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144014548] [2023-08-30 16:10:51,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:10:51,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:10:51,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:10:51,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:10:51,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:10:51,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 402 [2023-08-30 16:10:51,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:51,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:10:51,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 402 [2023-08-30 16:10:51,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:10:51,310 INFO L130 PetriNetUnfolder]: 230/513 cut-off events. [2023-08-30 16:10:51,311 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-30 16:10:51,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1105 conditions, 513 events. 230/513 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2000 event pairs, 29 based on Foata normal form. 42/525 useless extension candidates. Maximal degree in co-relation 1099. Up to 407 conditions per place. [2023-08-30 16:10:51,313 INFO L137 encePairwiseOnDemand]: 398/402 looper letters, 43 selfloop transitions, 3 changer transitions 1/51 dead transitions. [2023-08-30 16:10:51,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 222 flow [2023-08-30 16:10:51,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:10:51,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:10:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-30 16:10:51,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5339966832504146 [2023-08-30 16:10:51,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-30 16:10:51,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-30 16:10:51,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:10:51,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-30 16:10:51,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:51,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:51,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:51,322 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 113 flow. Second operand 3 states and 644 transitions. [2023-08-30 16:10:51,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 222 flow [2023-08-30 16:10:51,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:10:51,324 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 114 flow [2023-08-30 16:10:51,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-08-30 16:10:51,325 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-08-30 16:10:51,325 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 114 flow [2023-08-30 16:10:51,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:51,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:10:51,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:10:51,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:10:51,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 16:10:51,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:10:51,326 INFO L85 PathProgramCache]: Analyzing trace with hash 818194887, now seen corresponding path program 1 times [2023-08-30 16:10:51,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:10:51,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648516068] [2023-08-30 16:10:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:10:51,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:10:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:10:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:10:51,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:10:51,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648516068] [2023-08-30 16:10:51,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648516068] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:10:51,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131174170] [2023-08-30 16:10:51,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:10:51,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:10:51,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:10:51,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:10:51,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 16:10:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:10:51,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 16:10:51,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:10:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:10:51,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:10:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:10:51,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131174170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:10:51,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:10:51,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 16:10:51,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903629215] [2023-08-30 16:10:51,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:10:51,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:10:51,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:10:51,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:10:51,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:10:51,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 402 [2023-08-30 16:10:51,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 114 flow. Second operand has 7 states, 7 states have (on average 205.57142857142858) internal successors, (1439), 7 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:51,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:10:51,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 402 [2023-08-30 16:10:51,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:10:51,749 INFO L130 PetriNetUnfolder]: 246/536 cut-off events. [2023-08-30 16:10:51,750 INFO L131 PetriNetUnfolder]: For 36/38 co-relation queries the response was YES. [2023-08-30 16:10:51,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 536 events. 246/536 cut-off events. For 36/38 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1552 event pairs, 100 based on Foata normal form. 12/512 useless extension candidates. Maximal degree in co-relation 1199. Up to 238 conditions per place. [2023-08-30 16:10:51,751 INFO L137 encePairwiseOnDemand]: 397/402 looper letters, 70 selfloop transitions, 10 changer transitions 1/85 dead transitions. [2023-08-30 16:10:51,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 85 transitions, 372 flow [2023-08-30 16:10:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:10:51,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:10:51,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1283 transitions. [2023-08-30 16:10:51,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319237147595357 [2023-08-30 16:10:51,754 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1283 transitions. [2023-08-30 16:10:51,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1283 transitions. [2023-08-30 16:10:51,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:10:51,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1283 transitions. [2023-08-30 16:10:51,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 213.83333333333334) internal successors, (1283), 6 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:51,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 402.0) internal successors, (2814), 7 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:51,760 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 402.0) internal successors, (2814), 7 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:51,760 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 114 flow. Second operand 6 states and 1283 transitions. [2023-08-30 16:10:51,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 85 transitions, 372 flow [2023-08-30 16:10:51,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 85 transitions, 369 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:10:51,762 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 172 flow [2023-08-30 16:10:51,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-30 16:10:51,763 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2023-08-30 16:10:51,763 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 172 flow [2023-08-30 16:10:51,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 205.57142857142858) internal successors, (1439), 7 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:51,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:10:51,764 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:10:51,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 16:10:51,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:10:51,972 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 16:10:51,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:10:51,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1030938622, now seen corresponding path program 2 times [2023-08-30 16:10:51,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:10:51,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057091816] [2023-08-30 16:10:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:10:51,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:10:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:10:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:10:52,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:10:52,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057091816] [2023-08-30 16:10:52,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057091816] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:10:52,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143633954] [2023-08-30 16:10:52,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:10:52,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:10:52,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:10:52,094 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:10:52,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 16:10:52,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:10:52,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:10:52,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 16:10:52,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:10:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:10:52,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:10:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:10:52,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143633954] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:10:52,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:10:52,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 16:10:52,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130971783] [2023-08-30 16:10:52,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:10:52,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 16:10:52,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:10:52,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 16:10:52,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 16:10:52,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 402 [2023-08-30 16:10:52,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 205.84615384615384) internal successors, (2676), 13 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:52,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:10:52,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 402 [2023-08-30 16:10:52,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:10:52,648 INFO L130 PetriNetUnfolder]: 423/937 cut-off events. [2023-08-30 16:10:52,649 INFO L131 PetriNetUnfolder]: For 328/328 co-relation queries the response was YES. [2023-08-30 16:10:52,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2370 conditions, 937 events. 423/937 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 2594 event pairs, 91 based on Foata normal form. 24/903 useless extension candidates. Maximal degree in co-relation 2360. Up to 217 conditions per place. [2023-08-30 16:10:52,652 INFO L137 encePairwiseOnDemand]: 397/402 looper letters, 136 selfloop transitions, 22 changer transitions 0/162 dead transitions. [2023-08-30 16:10:52,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 162 transitions, 838 flow [2023-08-30 16:10:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 16:10:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 16:10:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2564 transitions. [2023-08-30 16:10:52,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5315091210613598 [2023-08-30 16:10:52,656 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2564 transitions. [2023-08-30 16:10:52,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2564 transitions. [2023-08-30 16:10:52,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:10:52,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2564 transitions. [2023-08-30 16:10:52,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 213.66666666666666) internal successors, (2564), 12 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:52,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 402.0) internal successors, (5226), 13 states have internal predecessors, (5226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:52,666 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 402.0) internal successors, (5226), 13 states have internal predecessors, (5226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:52,666 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 172 flow. Second operand 12 states and 2564 transitions. [2023-08-30 16:10:52,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 162 transitions, 838 flow [2023-08-30 16:10:52,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 162 transitions, 799 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-08-30 16:10:52,670 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 322 flow [2023-08-30 16:10:52,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=322, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2023-08-30 16:10:52,670 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 24 predicate places. [2023-08-30 16:10:52,670 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 322 flow [2023-08-30 16:10:52,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 205.84615384615384) internal successors, (2676), 13 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:52,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:10:52,671 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:10:52,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 16:10:52,881 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,SelfDestructingSolverStorable5 [2023-08-30 16:10:52,881 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 16:10:52,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:10:52,881 INFO L85 PathProgramCache]: Analyzing trace with hash -122187422, now seen corresponding path program 3 times [2023-08-30 16:10:52,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:10:52,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64505248] [2023-08-30 16:10:52,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:10:52,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:10:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:10:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:10:53,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:10:53,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64505248] [2023-08-30 16:10:53,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64505248] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:10:53,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211547275] [2023-08-30 16:10:53,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 16:10:53,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:10:53,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:10:53,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:10:53,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 16:10:53,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 16:10:53,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:10:53,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 16:10:53,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:10:54,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 16:10:54,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:10:54,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 16:10:54,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:10:54,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-08-30 16:10:54,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-08-30 16:10:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 76 proven. 45 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-08-30 16:10:54,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:10:54,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:10:54,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 42 [2023-08-30 16:10:54,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:10:54,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 77 [2023-08-30 16:10:54,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2023-08-30 16:10:54,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-08-30 16:10:54,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:10:54,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 46 [2023-08-30 16:10:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 76 proven. 45 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-08-30 16:10:54,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211547275] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:10:54,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:10:54,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 25 [2023-08-30 16:10:54,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354517663] [2023-08-30 16:10:54,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:10:54,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 16:10:54,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:10:54,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 16:10:54,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=473, Unknown=4, NotChecked=0, Total=600 [2023-08-30 16:10:55,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 402 [2023-08-30 16:10:55,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 322 flow. Second operand has 25 states, 25 states have (on average 156.6) internal successors, (3915), 25 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:55,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:10:55,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 402 [2023-08-30 16:10:55,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:10:57,172 INFO L130 PetriNetUnfolder]: 821/1809 cut-off events. [2023-08-30 16:10:57,173 INFO L131 PetriNetUnfolder]: For 1316/1316 co-relation queries the response was YES. [2023-08-30 16:10:57,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4870 conditions, 1809 events. 821/1809 cut-off events. For 1316/1316 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6526 event pairs, 57 based on Foata normal form. 8/1746 useless extension candidates. Maximal degree in co-relation 4853. Up to 285 conditions per place. [2023-08-30 16:10:57,180 INFO L137 encePairwiseOnDemand]: 390/402 looper letters, 267 selfloop transitions, 110 changer transitions 1/381 dead transitions. [2023-08-30 16:10:57,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 381 transitions, 2042 flow [2023-08-30 16:10:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 16:10:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 16:10:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 6885 transitions. [2023-08-30 16:10:57,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3982992016660882 [2023-08-30 16:10:57,194 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 6885 transitions. [2023-08-30 16:10:57,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 6885 transitions. [2023-08-30 16:10:57,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:10:57,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 6885 transitions. [2023-08-30 16:10:57,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 160.11627906976744) internal successors, (6885), 43 states have internal predecessors, (6885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:57,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 402.0) internal successors, (17688), 44 states have internal predecessors, (17688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:57,231 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 402.0) internal successors, (17688), 44 states have internal predecessors, (17688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:57,232 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 322 flow. Second operand 43 states and 6885 transitions. [2023-08-30 16:10:57,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 381 transitions, 2042 flow [2023-08-30 16:10:57,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 381 transitions, 2027 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 16:10:57,240 INFO L231 Difference]: Finished difference. Result has 135 places, 164 transitions, 1174 flow [2023-08-30 16:10:57,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1174, PETRI_PLACES=135, PETRI_TRANSITIONS=164} [2023-08-30 16:10:57,241 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 88 predicate places. [2023-08-30 16:10:57,241 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 164 transitions, 1174 flow [2023-08-30 16:10:57,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 156.6) internal successors, (3915), 25 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:57,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:10:57,243 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:10:57,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 16:10:57,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:10:57,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 16:10:57,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:10:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash -161773555, now seen corresponding path program 1 times [2023-08-30 16:10:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:10:57,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841323396] [2023-08-30 16:10:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:10:57,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:10:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:10:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:10:57,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:10:57,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841323396] [2023-08-30 16:10:57,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841323396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:10:57,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256293730] [2023-08-30 16:10:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:10:57,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:10:57,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:10:57,833 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:10:57,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 16:10:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:10:58,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 16:10:58,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:10:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:10:58,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:10:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:10:58,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256293730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:10:58,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:10:58,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-08-30 16:10:58,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601606064] [2023-08-30 16:10:58,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:10:58,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 16:10:58,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:10:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 16:10:58,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-08-30 16:10:58,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 402 [2023-08-30 16:10:58,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 164 transitions, 1174 flow. Second operand has 27 states, 27 states have (on average 206.25925925925927) internal successors, (5569), 27 states have internal predecessors, (5569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:58,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:10:58,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 402 [2023-08-30 16:10:58,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:10:59,250 INFO L130 PetriNetUnfolder]: 1371/3215 cut-off events. [2023-08-30 16:10:59,250 INFO L131 PetriNetUnfolder]: For 28289/28289 co-relation queries the response was YES. [2023-08-30 16:10:59,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14009 conditions, 3215 events. 1371/3215 cut-off events. For 28289/28289 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11621 event pairs, 136 based on Foata normal form. 104/3295 useless extension candidates. Maximal degree in co-relation 13966. Up to 452 conditions per place. [2023-08-30 16:10:59,270 INFO L137 encePairwiseOnDemand]: 397/402 looper letters, 413 selfloop transitions, 75 changer transitions 0/492 dead transitions. [2023-08-30 16:10:59,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 492 transitions, 5505 flow [2023-08-30 16:10:59,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 16:10:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 16:10:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 5553 transitions. [2023-08-30 16:10:59,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5312858783008036 [2023-08-30 16:10:59,279 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 5553 transitions. [2023-08-30 16:10:59,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 5553 transitions. [2023-08-30 16:10:59,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:10:59,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 5553 transitions. [2023-08-30 16:10:59,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 213.57692307692307) internal successors, (5553), 26 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:59,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 402.0) internal successors, (10854), 27 states have internal predecessors, (10854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:59,299 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 402.0) internal successors, (10854), 27 states have internal predecessors, (10854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:59,299 INFO L175 Difference]: Start difference. First operand has 135 places, 164 transitions, 1174 flow. Second operand 26 states and 5553 transitions. [2023-08-30 16:10:59,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 492 transitions, 5505 flow [2023-08-30 16:10:59,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 492 transitions, 5318 flow, removed 14 selfloop flow, removed 11 redundant places. [2023-08-30 16:10:59,342 INFO L231 Difference]: Finished difference. Result has 163 places, 202 transitions, 1744 flow [2023-08-30 16:10:59,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1744, PETRI_PLACES=163, PETRI_TRANSITIONS=202} [2023-08-30 16:10:59,343 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 116 predicate places. [2023-08-30 16:10:59,344 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 202 transitions, 1744 flow [2023-08-30 16:10:59,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 206.25925925925927) internal successors, (5569), 27 states have internal predecessors, (5569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:10:59,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:10:59,345 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:10:59,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 16:10:59,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:10:59,552 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 16:10:59,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:10:59,552 INFO L85 PathProgramCache]: Analyzing trace with hash -346057744, now seen corresponding path program 2 times [2023-08-30 16:10:59,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:10:59,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181118817] [2023-08-30 16:10:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:10:59,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:10:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:11:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:11:00,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:11:00,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181118817] [2023-08-30 16:11:00,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181118817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:11:00,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017331301] [2023-08-30 16:11:00,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:11:00,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:11:00,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:11:00,697 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:11:00,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 16:11:01,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:11:01,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:11:01,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 16:11:01,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:11:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:11:01,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:11:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:11:01,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017331301] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:11:01,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:11:01,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-08-30 16:11:01,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833430337] [2023-08-30 16:11:01,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:11:01,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-08-30 16:11:01,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:11:01,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-08-30 16:11:01,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-08-30 16:11:02,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 402 [2023-08-30 16:11:02,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 202 transitions, 1744 flow. Second operand has 53 states, 53 states have (on average 206.41509433962264) internal successors, (10940), 53 states have internal predecessors, (10940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:11:02,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:11:02,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 402 [2023-08-30 16:11:02,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:11:04,156 INFO L130 PetriNetUnfolder]: 2697/6387 cut-off events. [2023-08-30 16:11:04,157 INFO L131 PetriNetUnfolder]: For 100006/100006 co-relation queries the response was YES. [2023-08-30 16:11:04,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29612 conditions, 6387 events. 2697/6387 cut-off events. For 100006/100006 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 23275 event pairs, 136 based on Foata normal form. 208/6571 useless extension candidates. Maximal degree in co-relation 29556. Up to 1128 conditions per place. [2023-08-30 16:11:04,203 INFO L137 encePairwiseOnDemand]: 397/402 looper letters, 829 selfloop transitions, 153 changer transitions 0/986 dead transitions. [2023-08-30 16:11:04,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 986 transitions, 11797 flow [2023-08-30 16:11:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-30 16:11:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-30 16:11:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 11104 transitions. [2023-08-30 16:11:04,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311902028319939 [2023-08-30 16:11:04,213 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 11104 transitions. [2023-08-30 16:11:04,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 11104 transitions. [2023-08-30 16:11:04,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:11:04,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 11104 transitions. [2023-08-30 16:11:04,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 213.53846153846155) internal successors, (11104), 52 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:11:04,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 402.0) internal successors, (21306), 53 states have internal predecessors, (21306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:11:04,242 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 402.0) internal successors, (21306), 53 states have internal predecessors, (21306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:11:04,243 INFO L175 Difference]: Start difference. First operand has 163 places, 202 transitions, 1744 flow. Second operand 52 states and 11104 transitions. [2023-08-30 16:11:04,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 986 transitions, 11797 flow [2023-08-30 16:11:04,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 986 transitions, 11734 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-30 16:11:04,397 INFO L231 Difference]: Finished difference. Result has 230 places, 282 transitions, 3412 flow [2023-08-30 16:11:04,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=3412, PETRI_PLACES=230, PETRI_TRANSITIONS=282} [2023-08-30 16:11:04,398 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 183 predicate places. [2023-08-30 16:11:04,398 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 282 transitions, 3412 flow [2023-08-30 16:11:04,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 206.41509433962264) internal successors, (10940), 53 states have internal predecessors, (10940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:11:04,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:11:04,401 INFO L208 CegarLoopForPetriNet]: trace histogram [50, 50, 50, 50, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:11:04,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 16:11:04,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:11:04,608 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 16:11:04,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:11:04,608 INFO L85 PathProgramCache]: Analyzing trace with hash 890330880, now seen corresponding path program 3 times [2023-08-30 16:11:04,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:11:04,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534966985] [2023-08-30 16:11:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:11:04,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:11:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:11:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7675 backedges. 0 proven. 7675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:11:07,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:11:07,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534966985] [2023-08-30 16:11:07,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534966985] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:11:07,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824617216] [2023-08-30 16:11:07,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 16:11:07,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:11:07,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:11:07,769 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:11:07,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 16:11:09,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 16:11:09,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:11:09,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 16:11:09,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:11:10,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 16:11:10,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:11:10,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 16:11:10,246 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 16:11:10,251 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 16:11:10,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2023-08-30 16:11:10,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 16:11:10,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2023-08-30 16:11:10,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:11:10,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 16:11:10,510 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 16:11:10,516 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-08-30 16:11:10,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 27 [2023-08-30 16:11:10,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 16:11:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7675 backedges. 644 proven. 245 refuted. 0 times theorem prover too weak. 6786 trivial. 0 not checked. [2023-08-30 16:11:10,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:11:10,727 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2175 Int) (v_ArrVal_2173 (Array Int Int))) (not (= 800 (let ((.cse1 (+ |c_~#queue~0.offset| 3204))) (select (let ((.cse0 (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_2173) |c_~#queue~0.base|))) (store .cse0 (+ |c_~#queue~0.offset| (* (select .cse0 .cse1) 4)) v_ArrVal_2175)) .cse1))))) is different from false [2023-08-30 16:11:10,734 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2175 Int) (v_ArrVal_2171 Int) (v_ArrVal_2173 (Array Int Int))) (or (< (+ |c_t1Thread1of1ForFork0_enqueue_#t~mem40#1| 1) v_ArrVal_2171) (not (= (let ((.cse1 (+ |c_~#queue~0.offset| 3204))) (select (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ 3204 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2171)) |c_~#stored_elements~0.base| v_ArrVal_2173) |c_~#queue~0.base|))) (store .cse0 (+ |c_~#queue~0.offset| (* (select .cse0 .cse1) 4)) v_ArrVal_2175)) .cse1)) 800)))) is different from false [2023-08-30 16:11:10,743 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2175 Int) (v_ArrVal_2171 Int) (v_ArrVal_2173 (Array Int Int))) (let ((.cse0 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse1 (+ 3204 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|))) (or (< (+ (select .cse0 .cse1) 1) v_ArrVal_2171) (not (= (let ((.cse3 (+ |c_~#queue~0.offset| 3204))) (select (let ((.cse2 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store .cse0 .cse1 v_ArrVal_2171)) |c_~#stored_elements~0.base| v_ArrVal_2173) |c_~#queue~0.base|))) (store .cse2 (+ |c_~#queue~0.offset| (* (select .cse2 .cse3) 4)) v_ArrVal_2175)) .cse3)) 800))))) is different from false [2023-08-30 16:11:10,759 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2175 Int) (v_ArrVal_2169 Int) (v_ArrVal_2171 Int) (v_ArrVal_2173 (Array Int Int))) (let ((.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse3 (+ 3204 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|))) (or (not (= (let ((.cse1 (+ |c_~#queue~0.offset| 3204))) (select (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse2 (+ 3208 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2169) .cse3 v_ArrVal_2171)) |c_~#stored_elements~0.base| v_ArrVal_2173) |c_~#queue~0.base|))) (store .cse0 (+ (* (select .cse0 .cse1) 4) |c_~#queue~0.offset|) v_ArrVal_2175)) .cse1)) 800)) (< (+ (select .cse2 .cse3) 1) v_ArrVal_2171)))) is different from false [2023-08-30 16:11:10,778 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2175 Int) (v_ArrVal_2167 Int) (v_ArrVal_2169 Int) (v_ArrVal_2171 Int) (v_ArrVal_2173 (Array Int Int))) (let ((.cse0 (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ (* |c_t1Thread1of1ForFork0_enqueue_#t~mem36#1| 4) |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2167)) (.cse1 (+ 3204 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|))) (or (< (+ (select .cse0 .cse1) 1) v_ArrVal_2171) (not (= 800 (let ((.cse3 (+ |c_~#queue~0.offset| 3204))) (select (let ((.cse2 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse0 (+ 3208 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2169) .cse1 v_ArrVal_2171)) |c_~#stored_elements~0.base| v_ArrVal_2173) |c_~#queue~0.base|))) (store .cse2 (+ (* (select .cse2 .cse3) 4) |c_~#queue~0.offset|) v_ArrVal_2175)) .cse3))))))) is different from false [2023-08-30 16:11:13,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:11:13,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 129 [2023-08-30 16:11:13,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:11:13,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 212 [2023-08-30 16:11:13,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2023-08-30 16:11:13,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2023-08-30 16:11:13,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-30 16:11:13,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:11:13,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 71 [2023-08-30 16:11:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7675 backedges. 332 proven. 241 refuted. 48 times theorem prover too weak. 6786 trivial. 268 not checked. [2023-08-30 16:11:15,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824617216] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:11:15,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:11:15,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 11, 13] total 75 [2023-08-30 16:11:15,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566583288] [2023-08-30 16:11:15,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:11:15,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-08-30 16:11:15,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:11:15,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-08-30 16:11:15,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1491, Invalid=3349, Unknown=10, NotChecked=700, Total=5550 [2023-08-30 16:11:15,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 402 [2023-08-30 16:11:15,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 282 transitions, 3412 flow. Second operand has 75 states, 75 states have (on average 155.26666666666668) internal successors, (11645), 75 states have internal predecessors, (11645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:11:15,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:11:15,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 402 [2023-08-30 16:11:15,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:12:32,066 INFO L130 PetriNetUnfolder]: 5789/13261 cut-off events. [2023-08-30 16:12:32,066 INFO L131 PetriNetUnfolder]: For 195510/195510 co-relation queries the response was YES. [2023-08-30 16:12:32,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67371 conditions, 13261 events. 5789/13261 cut-off events. For 195510/195510 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 61988 event pairs, 213 based on Foata normal form. 408/13633 useless extension candidates. Maximal degree in co-relation 67288. Up to 2163 conditions per place. [2023-08-30 16:12:32,196 INFO L137 encePairwiseOnDemand]: 386/402 looper letters, 1958 selfloop transitions, 1567 changer transitions 1/3529 dead transitions. [2023-08-30 16:12:32,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 3529 transitions, 35163 flow [2023-08-30 16:12:32,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 521 states. [2023-08-30 16:12:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2023-08-30 16:12:32,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 81260 transitions. [2023-08-30 16:12:32,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879833080279982 [2023-08-30 16:12:32,256 INFO L72 ComplementDD]: Start complementDD. Operand 521 states and 81260 transitions. [2023-08-30 16:12:32,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 521 states and 81260 transitions. [2023-08-30 16:12:32,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:12:32,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 521 states and 81260 transitions. [2023-08-30 16:12:32,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 522 states, 521 states have (on average 155.96928982725527) internal successors, (81260), 521 states have internal predecessors, (81260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:12:32,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 522 states, 522 states have (on average 402.0) internal successors, (209844), 522 states have internal predecessors, (209844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:12:32,569 INFO L81 ComplementDD]: Finished complementDD. Result has 522 states, 522 states have (on average 402.0) internal successors, (209844), 522 states have internal predecessors, (209844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:12:32,570 INFO L175 Difference]: Start difference. First operand has 230 places, 282 transitions, 3412 flow. Second operand 521 states and 81260 transitions. [2023-08-30 16:12:32,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 3529 transitions, 35163 flow [2023-08-30 16:12:32,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 3529 transitions, 34944 flow, removed 0 selfloop flow, removed 23 redundant places. [2023-08-30 16:12:33,008 INFO L231 Difference]: Finished difference. Result has 983 places, 1809 transitions, 28626 flow [2023-08-30 16:12:33,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=3244, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=521, PETRI_FLOW=28626, PETRI_PLACES=983, PETRI_TRANSITIONS=1809} [2023-08-30 16:12:33,009 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 936 predicate places. [2023-08-30 16:12:33,009 INFO L495 AbstractCegarLoop]: Abstraction has has 983 places, 1809 transitions, 28626 flow [2023-08-30 16:12:33,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 155.26666666666668) internal successors, (11645), 75 states have internal predecessors, (11645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:12:33,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:12:33,011 INFO L208 CegarLoopForPetriNet]: trace histogram [51, 51, 51, 51, 38, 38, 38, 38, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:12:33,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 16:12:33,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:12:33,219 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 16:12:33,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:12:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1940408699, now seen corresponding path program 4 times [2023-08-30 16:12:33,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:12:33,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381344874] [2023-08-30 16:12:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:12:33,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:12:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:12:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8691 backedges. 0 proven. 8691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:12:35,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:12:35,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381344874] [2023-08-30 16:12:35,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381344874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:12:35,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879418630] [2023-08-30 16:12:35,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 16:12:35,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:12:35,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:12:35,913 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:12:35,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 16:14:20,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 16:14:20,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:14:20,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 2682 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 16:14:20,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:14:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8691 backedges. 0 proven. 8691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:14:20,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:14:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8691 backedges. 0 proven. 8691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:14:22,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879418630] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:14:22,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:14:22,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2023-08-30 16:14:22,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924961764] [2023-08-30 16:14:22,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:14:22,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-08-30 16:14:22,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:14:22,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-08-30 16:14:22,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2023-08-30 16:14:23,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 402 [2023-08-30 16:14:23,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 983 places, 1809 transitions, 28626 flow. Second operand has 107 states, 107 states have (on average 206.69158878504672) internal successors, (22116), 107 states have internal predecessors, (22116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:14:23,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:14:23,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 402 [2023-08-30 16:14:23,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:15:04,275 INFO L130 PetriNetUnfolder]: 10300/25216 cut-off events. [2023-08-30 16:15:04,275 INFO L131 PetriNetUnfolder]: For 19688567/19688567 co-relation queries the response was YES. [2023-08-30 16:15:05,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700714 conditions, 25216 events. 10300/25216 cut-off events. For 19688567/19688567 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 122181 event pairs, 400 based on Foata normal form. 848/26028 useless extension candidates. Maximal degree in co-relation 700374. Up to 6939 conditions per place. [2023-08-30 16:15:05,276 INFO L137 encePairwiseOnDemand]: 397/402 looper letters, 3731 selfloop transitions, 522 changer transitions 0/4257 dead transitions. [2023-08-30 16:15:05,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1088 places, 4257 transitions, 144094 flow [2023-08-30 16:15:05,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-08-30 16:15:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2023-08-30 16:15:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 22633 transitions. [2023-08-30 16:15:05,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311414624988267 [2023-08-30 16:15:05,291 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 22633 transitions. [2023-08-30 16:15:05,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 22633 transitions. [2023-08-30 16:15:05,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:15:05,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 22633 transitions. [2023-08-30 16:15:05,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 213.5188679245283) internal successors, (22633), 106 states have internal predecessors, (22633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:15:05,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 402.0) internal successors, (43014), 107 states have internal predecessors, (43014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:15:05,342 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 402.0) internal successors, (43014), 107 states have internal predecessors, (43014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:15:05,343 INFO L175 Difference]: Start difference. First operand has 983 places, 1809 transitions, 28626 flow. Second operand 106 states and 22633 transitions. [2023-08-30 16:15:05,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1088 places, 4257 transitions, 144094 flow [2023-08-30 16:15:26,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 997 places, 4257 transitions, 119312 flow, removed 10235 selfloop flow, removed 91 redundant places. [2023-08-30 16:15:26,194 INFO L231 Difference]: Finished difference. Result has 1051 places, 2073 transitions, 22082 flow [2023-08-30 16:15:26,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=16143, PETRI_DIFFERENCE_MINUEND_PLACES=892, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=22082, PETRI_PLACES=1051, PETRI_TRANSITIONS=2073} [2023-08-30 16:15:26,196 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1004 predicate places. [2023-08-30 16:15:26,196 INFO L495 AbstractCegarLoop]: Abstraction has has 1051 places, 2073 transitions, 22082 flow [2023-08-30 16:15:26,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 206.69158878504672) internal successors, (22116), 107 states have internal predecessors, (22116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:15:26,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:15:26,199 INFO L208 CegarLoopForPetriNet]: trace histogram [104, 104, 104, 104, 77, 77, 77, 77, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:15:26,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 16:15:26,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:15:26,418 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 16:15:26,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:15:26,419 INFO L85 PathProgramCache]: Analyzing trace with hash 116668732, now seen corresponding path program 5 times [2023-08-30 16:15:26,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:15:26,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832887229] [2023-08-30 16:15:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:15:26,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:15:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:15:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 36364 backedges. 0 proven. 36364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:15:36,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:15:36,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832887229] [2023-08-30 16:15:36,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832887229] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:15:36,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072651917] [2023-08-30 16:15:36,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 16:15:36,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:15:36,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:15:36,425 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) [2023-08-30 16:15:36,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 16:15:38,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-08-30 16:15:38,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:15:38,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 197 conjunts are in the unsatisfiable core [2023-08-30 16:15:38,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:15:38,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 16:15:38,955 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2023-08-30 16:15:38,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 38 [2023-08-30 16:15:39,204 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 16:15:39,214 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-08-30 16:15:39,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 62 [2023-08-30 16:15:39,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:15:39,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2023-08-30 16:15:39,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 43 [2023-08-30 16:15:39,570 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2023-08-30 16:15:39,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 63 [2023-08-30 16:15:39,710 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 16:15:39,719 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-08-30 16:15:39,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 62 [2023-08-30 16:15:39,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:15:39,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2023-08-30 16:15:40,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 47 [2023-08-30 16:15:40,163 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2023-08-30 16:15:40,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 63 [2023-08-30 16:15:40,277 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 16:15:40,285 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-08-30 16:15:40,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 62 [2023-08-30 16:15:40,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:15:40,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2023-08-30 16:15:40,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 47 [2023-08-30 16:15:40,722 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2023-08-30 16:15:40,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 63 [2023-08-30 16:15:40,912 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 16:15:40,920 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-08-30 16:15:40,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 62 [2023-08-30 16:15:41,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:15:41,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2023-08-30 16:15:41,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-08-30 16:15:41,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:15:41,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-08-30 16:15:41,403 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 16:15:41,408 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-08-30 16:15:41,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2023-08-30 16:15:41,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:15:41,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 16:15:41,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-08-30 16:15:41,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:15:41,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-08-30 16:15:41,791 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 16:15:41,797 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-08-30 16:15:41,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2023-08-30 16:15:41,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:15:41,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 16:15:42,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-08-30 16:15:42,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:15:42,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-08-30 16:15:42,240 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 16:15:42,245 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-08-30 16:15:42,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2023-08-30 16:15:42,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:15:42,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 16:15:42,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2023-08-30 16:15:42,543 INFO L321 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-08-30 16:15:42,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2023-08-30 16:15:42,679 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 16:15:42,685 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-08-30 16:15:42,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2023-08-30 16:15:42,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:15:42,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-30 16:15:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 36364 backedges. 12060 proven. 93 refuted. 0 times theorem prover too weak. 24211 trivial. 0 not checked. [2023-08-30 16:15:42,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:20:53,414 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4859 Int) (v_ArrVal_4849 Int) (v_ArrVal_4866 Int) (v_ArrVal_4845 Int) (v_ArrVal_4856 Int) (v_ArrVal_4853 Int) (v_ArrVal_4864 Int) (v_ArrVal_4854 Int) (v_ArrVal_4851 Int) (v_ArrVal_4863 Int) (v_ArrVal_4861 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_500| Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_504| Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_502| Int) (|v_t1Thread1of1ForFork0_~i~0#1_396| Int) (|v_t1Thread1of1ForFork0_~i~0#1_395| Int)) (let ((.cse11 (let ((.cse12 (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse13 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse14 (+ 3204 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|))) (store (store .cse13 (+ 3208 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_4845) .cse14 (+ (select .cse13 .cse14) 1)))))) (store .cse12 |c_~#stored_elements~0.base| (store (select .cse12 |c_~#stored_elements~0.base|) (+ |c_~#stored_elements~0.offset| (* |c_t1Thread1of1ForFork0_~i~0#1| 4)) v_ArrVal_4849))))) (let ((.cse5 (select .cse11 |c_~#queue~0.base|))) (let ((.cse9 (store .cse5 (+ (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_504| 4) |c_~#queue~0.offset|) v_ArrVal_4851)) (.cse8 (+ 3208 |c_~#queue~0.offset|)) (.cse2 (+ |c_~#queue~0.offset| 3204))) (let ((.cse7 (let ((.cse10 (store .cse11 |c_~#queue~0.base| (store (store .cse9 .cse8 v_ArrVal_4853) .cse2 v_ArrVal_4854)))) (store .cse10 |c_~#stored_elements~0.base| (store (select .cse10 |c_~#stored_elements~0.base|) (+ (* |v_t1Thread1of1ForFork0_~i~0#1_396| 4) |c_~#stored_elements~0.offset|) v_ArrVal_4856))))) (let ((.cse4 (select .cse7 |c_~#queue~0.base|))) (let ((.cse1 (store .cse4 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_502| 4)) v_ArrVal_4859))) (let ((.cse0 (select .cse9 .cse2)) (.cse3 (select (let ((.cse6 (store .cse7 |c_~#queue~0.base| (store (store .cse1 .cse8 v_ArrVal_4861) .cse2 v_ArrVal_4863)))) (store .cse6 |c_~#stored_elements~0.base| (store (select .cse6 |c_~#stored_elements~0.base|) (+ (* |v_t1Thread1of1ForFork0_~i~0#1_395| 4) |c_~#stored_elements~0.offset|) v_ArrVal_4864))) |c_~#queue~0.base|))) (or (= 800 .cse0) (< |v_t1Thread1of1ForFork0_~i~0#1_396| (+ |c_t1Thread1of1ForFork0_~i~0#1| 1)) (< (+ (select .cse1 .cse2) 1) v_ArrVal_4863) (< (select .cse3 .cse2) |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_500|) (< (select .cse4 .cse2) |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_502|) (< |v_t1Thread1of1ForFork0_~i~0#1_395| (+ |v_t1Thread1of1ForFork0_~i~0#1_396| 1)) (< (select .cse5 .cse2) |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_504|) (< (+ .cse0 1) v_ArrVal_4854) (not (= 800 (select (store .cse3 (+ (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_500| 4) |c_~#queue~0.offset|) v_ArrVal_4866) .cse2)))))))))))) is different from false Killed by 15