./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --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 991dbc557cd31e595edd52677120ba8d8af2b607a4ab228e6500c72ebba22de0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:11:15,095 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:11:15,182 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:11:15,189 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:11:15,192 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:11:15,217 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:11:15,219 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:11:15,219 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:11:15,220 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:11:15,222 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:11:15,222 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:11:15,223 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:11:15,224 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:11:15,225 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:11:15,226 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:11:15,226 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:11:15,226 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:11:15,227 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:11:15,227 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:11:15,227 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:11:15,228 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:11:15,230 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:11:15,230 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:11:15,231 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:11:15,231 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:11:15,231 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:11:15,232 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:11:15,232 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:11:15,232 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:11:15,232 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:11:15,233 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:11:15,233 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:11:15,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:11:15,233 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:11:15,233 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:11:15,234 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:11:15,234 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:11:15,236 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:11:15,236 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:11:15,236 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:11:15,236 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:11:15,237 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:11:15,238 INFO L153 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 991dbc557cd31e595edd52677120ba8d8af2b607a4ab228e6500c72ebba22de0 [2024-10-11 14:11:15,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:11:15,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:11:15,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:11:15,551 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:11:15,551 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:11:15,552 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i [2024-10-11 14:11:17,021 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:11:17,261 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:11:17,261 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i [2024-10-11 14:11:17,278 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/3d8c2c19e/6b703cb0f0f743bd9b035ee373a75603/FLAGbbbbd474c [2024-10-11 14:11:17,587 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/3d8c2c19e/6b703cb0f0f743bd9b035ee373a75603 [2024-10-11 14:11:17,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:11:17,592 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:11:17,595 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:11:17,595 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:11:17,600 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:11:17,601 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:11:17" (1/1) ... [2024-10-11 14:11:17,602 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba8090e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:17, skipping insertion in model container [2024-10-11 14:11:17,602 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:11:17" (1/1) ... [2024-10-11 14:11:17,650 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:11:17,991 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i[30871,30884] [2024-10-11 14:11:18,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:11:18,017 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:11:18,054 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i[30871,30884] [2024-10-11 14:11:18,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:11:18,098 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:11:18,099 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:18 WrapperNode [2024-10-11 14:11:18,099 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:11:18,100 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:11:18,101 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:11:18,101 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:11:18,108 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:18" (1/1) ... [2024-10-11 14:11:18,125 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:18" (1/1) ... [2024-10-11 14:11:18,154 INFO L138 Inliner]: procedures = 164, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2024-10-11 14:11:18,154 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:11:18,155 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:11:18,156 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:11:18,156 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:11:18,166 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:18" (1/1) ... [2024-10-11 14:11:18,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:18" (1/1) ... [2024-10-11 14:11:18,169 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:18" (1/1) ... [2024-10-11 14:11:18,182 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 5, 8]. 53 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 1 writes are split as follows [0, 0, 1]. [2024-10-11 14:11:18,183 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:18" (1/1) ... [2024-10-11 14:11:18,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:18" (1/1) ... [2024-10-11 14:11:18,188 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:18" (1/1) ... [2024-10-11 14:11:18,191 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:18" (1/1) ... [2024-10-11 14:11:18,193 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:18" (1/1) ... [2024-10-11 14:11:18,194 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:18" (1/1) ... [2024-10-11 14:11:18,197 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:11:18,198 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:11:18,198 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:11:18,198 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:11:18,203 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:18" (1/1) ... [2024-10-11 14:11:18,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:11:18,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:18,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:11:18,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:11:18,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:11:18,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:11:18,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 14:11:18,269 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-11 14:11:18,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-11 14:11:18,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:11:18,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:11:18,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 14:11:18,270 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 14:11:18,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:11:18,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:11:18,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:11:18,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 14:11:18,271 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 14:11:18,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:11:18,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:11:18,272 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:11:18,429 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:11:18,432 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:11:18,601 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:11:18,602 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:11:18,769 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:11:18,769 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 14:11:18,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:11:18 BoogieIcfgContainer [2024-10-11 14:11:18,771 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:11:18,773 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:11:18,773 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:11:18,778 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:11:18,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:11:17" (1/3) ... [2024-10-11 14:11:18,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4b2f1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:11:18, skipping insertion in model container [2024-10-11 14:11:18,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:11:18" (2/3) ... [2024-10-11 14:11:18,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4b2f1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:11:18, skipping insertion in model container [2024-10-11 14:11:18,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:11:18" (3/3) ... [2024-10-11 14:11:18,783 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt-pthread.i [2024-10-11 14:11:18,799 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:11:18,799 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:11:18,799 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:11:18,835 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:11:18,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 25 transitions, 54 flow [2024-10-11 14:11:18,907 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-10-11 14:11:18,908 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:11:18,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-10-11 14:11:18,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 25 transitions, 54 flow [2024-10-11 14:11:18,917 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 25 transitions, 54 flow [2024-10-11 14:11:18,926 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:11:18,934 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@29f4cf9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:11:18,934 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:11:18,945 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:11:18,945 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2024-10-11 14:11:18,945 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:11:18,945 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:18,946 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-11 14:11:18,947 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 14:11:18,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1213145637, now seen corresponding path program 1 times [2024-10-11 14:11:18,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:18,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140860598] [2024-10-11 14:11:18,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:18,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:11:19,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:19,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140860598] [2024-10-11 14:11:19,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140860598] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:19,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:11:19,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:11:19,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664277095] [2024-10-11 14:11:19,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:19,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:19,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:19,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:19,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:11:19,264 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-10-11 14:11:19,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 25 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:19,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:19,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-10-11 14:11:19,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:19,342 INFO L124 PetriNetUnfolderBase]: 25/76 cut-off events. [2024-10-11 14:11:19,342 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:11:19,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 76 events. 25/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 164 event pairs, 18 based on Foata normal form. 3/72 useless extension candidates. Maximal degree in co-relation 118. Up to 56 conditions per place. [2024-10-11 14:11:19,346 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 15 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2024-10-11 14:11:19,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 24 transitions, 86 flow [2024-10-11 14:11:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-10-11 14:11:19,359 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2024-10-11 14:11:19,361 INFO L175 Difference]: Start difference. First operand has 24 places, 25 transitions, 54 flow. Second operand 3 states and 41 transitions. [2024-10-11 14:11:19,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 24 transitions, 86 flow [2024-10-11 14:11:19,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 86 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:11:19,367 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 62 flow [2024-10-11 14:11:19,369 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2024-10-11 14:11:19,373 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2024-10-11 14:11:19,376 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 62 flow [2024-10-11 14:11:19,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:19,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:19,376 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:19,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:11:19,377 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 14:11:19,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:19,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2135016630, now seen corresponding path program 1 times [2024-10-11 14:11:19,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:19,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567152795] [2024-10-11 14:11:19,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:19,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:11:19,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:19,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567152795] [2024-10-11 14:11:19,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567152795] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:19,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684966592] [2024-10-11 14:11:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:19,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:19,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:19,515 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:11:19,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:11:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:19,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:11:19,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:11:19,695 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:11:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:11:19,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684966592] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:11:19,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:11:19,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 14:11:19,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493569206] [2024-10-11 14:11:19,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:11:19,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:11:19,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:19,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:11:19,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:11:19,723 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-10-11 14:11:19,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:19,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:19,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-10-11 14:11:19,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:19,791 INFO L124 PetriNetUnfolderBase]: 25/79 cut-off events. [2024-10-11 14:11:19,792 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:11:19,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 79 events. 25/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 164 event pairs, 18 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 141. Up to 56 conditions per place. [2024-10-11 14:11:19,793 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 15 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2024-10-11 14:11:19,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 114 flow [2024-10-11 14:11:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:11:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:11:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2024-10-11 14:11:19,795 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-10-11 14:11:19,796 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 62 flow. Second operand 6 states and 65 transitions. [2024-10-11 14:11:19,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 114 flow [2024-10-11 14:11:19,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 110 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:11:19,797 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 94 flow [2024-10-11 14:11:19,798 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=94, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2024-10-11 14:11:19,799 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 9 predicate places. [2024-10-11 14:11:19,799 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 94 flow [2024-10-11 14:11:19,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:19,799 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:19,799 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-10-11 14:11:19,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:11:20,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:20,004 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 14:11:20,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:20,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1054097819, now seen corresponding path program 2 times [2024-10-11 14:11:20,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:20,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920874291] [2024-10-11 14:11:20,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:20,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:11:20,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:20,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920874291] [2024-10-11 14:11:20,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920874291] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:20,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256164441] [2024-10-11 14:11:20,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:11:20,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:20,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:20,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:11:20,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:11:20,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:11:20,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:11:20,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:11:20,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:11:20,281 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:11:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:11:20,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256164441] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:11:20,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:11:20,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-11 14:11:20,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875321872] [2024-10-11 14:11:20,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:11:20,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:11:20,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:20,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:11:20,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:11:20,324 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-10-11 14:11:20,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:20,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:20,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-10-11 14:11:20,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:20,377 INFO L124 PetriNetUnfolderBase]: 25/81 cut-off events. [2024-10-11 14:11:20,377 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-11 14:11:20,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 81 events. 25/81 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 164 event pairs, 18 based on Foata normal form. 2/77 useless extension candidates. Maximal degree in co-relation 132. Up to 56 conditions per place. [2024-10-11 14:11:20,379 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 15 selfloop transitions, 7 changer transitions 0/29 dead transitions. [2024-10-11 14:11:20,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 29 transitions, 150 flow [2024-10-11 14:11:20,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:11:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:11:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-10-11 14:11:20,380 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-10-11 14:11:20,380 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 94 flow. Second operand 8 states and 80 transitions. [2024-10-11 14:11:20,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 29 transitions, 150 flow [2024-10-11 14:11:20,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 29 transitions, 136 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 14:11:20,383 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 116 flow [2024-10-11 14:11:20,383 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2024-10-11 14:11:20,384 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 17 predicate places. [2024-10-11 14:11:20,384 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 116 flow [2024-10-11 14:11:20,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:20,384 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:20,385 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2024-10-11 14:11:20,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 14:11:20,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:20,586 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 14:11:20,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:20,586 INFO L85 PathProgramCache]: Analyzing trace with hash -624295803, now seen corresponding path program 3 times [2024-10-11 14:11:20,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:20,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810111063] [2024-10-11 14:11:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:20,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:20,643 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:11:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:20,689 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:11:20,692 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:11:20,693 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-10-11 14:11:20,695 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-10-11 14:11:20,696 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-10-11 14:11:20,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:11:20,696 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-10-11 14:11:20,699 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:11:20,700 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 14:11:20,728 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:11:20,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 43 transitions, 96 flow [2024-10-11 14:11:20,746 INFO L124 PetriNetUnfolderBase]: 7/48 cut-off events. [2024-10-11 14:11:20,747 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:11:20,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 48 events. 7/48 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 109 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 37. Up to 3 conditions per place. [2024-10-11 14:11:20,748 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 43 transitions, 96 flow [2024-10-11 14:11:20,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 43 transitions, 96 flow [2024-10-11 14:11:20,750 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:11:20,751 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@29f4cf9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:11:20,752 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-11 14:11:20,757 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:11:20,759 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-11 14:11:20,759 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 14:11:20,759 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:20,759 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:20,760 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-11 14:11:20,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:20,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1675961929, now seen corresponding path program 1 times [2024-10-11 14:11:20,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:20,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693258535] [2024-10-11 14:11:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:20,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:20,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:20,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693258535] [2024-10-11 14:11:20,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693258535] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:20,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:11:20,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:11:20,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668889501] [2024-10-11 14:11:20,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:20,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:20,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:20,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:20,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:11:20,813 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-11 14:11:20,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:20,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:20,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-11 14:11:20,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:20,988 INFO L124 PetriNetUnfolderBase]: 553/1101 cut-off events. [2024-10-11 14:11:20,990 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-11 14:11:20,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 1101 events. 553/1101 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5509 event pairs, 468 based on Foata normal form. 92/1075 useless extension candidates. Maximal degree in co-relation 1219. Up to 866 conditions per place. [2024-10-11 14:11:21,006 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 26 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-10-11 14:11:21,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 41 transitions, 148 flow [2024-10-11 14:11:21,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:21,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-10-11 14:11:21,009 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5503875968992248 [2024-10-11 14:11:21,010 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 96 flow. Second operand 3 states and 71 transitions. [2024-10-11 14:11:21,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 41 transitions, 148 flow [2024-10-11 14:11:21,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 148 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:11:21,016 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 102 flow [2024-10-11 14:11:21,016 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-10-11 14:11:21,017 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-10-11 14:11:21,017 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 102 flow [2024-10-11 14:11:21,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:21,017 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:21,018 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:21,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:11:21,018 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-11 14:11:21,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:21,018 INFO L85 PathProgramCache]: Analyzing trace with hash -221938941, now seen corresponding path program 1 times [2024-10-11 14:11:21,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:21,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703728384] [2024-10-11 14:11:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:21,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:21,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:21,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703728384] [2024-10-11 14:11:21,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703728384] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:21,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564289990] [2024-10-11 14:11:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:21,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:21,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:21,084 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:11:21,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:11:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:21,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:11:21,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:21,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:11:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:21,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564289990] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:11:21,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:11:21,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 14:11:21,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512177512] [2024-10-11 14:11:21,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:11:21,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:11:21,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:21,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:11:21,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:11:21,197 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-11 14:11:21,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 102 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:21,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:21,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-11 14:11:21,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:21,393 INFO L124 PetriNetUnfolderBase]: 553/1104 cut-off events. [2024-10-11 14:11:21,393 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-11 14:11:21,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2019 conditions, 1104 events. 553/1104 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5520 event pairs, 468 based on Foata normal form. 0/986 useless extension candidates. Maximal degree in co-relation 2006. Up to 866 conditions per place. [2024-10-11 14:11:21,400 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 26 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2024-10-11 14:11:21,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 176 flow [2024-10-11 14:11:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:11:21,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:11:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-10-11 14:11:21,403 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-10-11 14:11:21,403 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 102 flow. Second operand 6 states and 112 transitions. [2024-10-11 14:11:21,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 176 flow [2024-10-11 14:11:21,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 172 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:11:21,405 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 134 flow [2024-10-11 14:11:21,406 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-10-11 14:11:21,407 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-10-11 14:11:21,407 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 134 flow [2024-10-11 14:11:21,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:21,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:21,407 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:21,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:11:21,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:21,609 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-11 14:11:21,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:21,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1135707337, now seen corresponding path program 2 times [2024-10-11 14:11:21,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:21,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128237789] [2024-10-11 14:11:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:21,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:21,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:21,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128237789] [2024-10-11 14:11:21,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128237789] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:21,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774100848] [2024-10-11 14:11:21,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:11:21,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:21,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:21,703 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:11:21,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:11:21,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 14:11:21,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:11:21,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-11 14:11:21,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 14:11:21,797 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:11:21,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774100848] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:21,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:11:21,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-10-11 14:11:21,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340052673] [2024-10-11 14:11:21,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:21,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:21,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:21,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:21,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:11:21,804 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-10-11 14:11:21,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:21,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:21,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-10-11 14:11:21,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:22,037 INFO L124 PetriNetUnfolderBase]: 951/1882 cut-off events. [2024-10-11 14:11:22,037 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-10-11 14:11:22,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3466 conditions, 1882 events. 951/1882 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10896 event pairs, 418 based on Foata normal form. 0/1678 useless extension candidates. Maximal degree in co-relation 3431. Up to 784 conditions per place. [2024-10-11 14:11:22,051 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 50 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-10-11 14:11:22,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 283 flow [2024-10-11 14:11:22,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:22,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-10-11 14:11:22,052 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6589147286821705 [2024-10-11 14:11:22,052 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 134 flow. Second operand 3 states and 85 transitions. [2024-10-11 14:11:22,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 283 flow [2024-10-11 14:11:22,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 269 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 14:11:22,055 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 134 flow [2024-10-11 14:11:22,055 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-10-11 14:11:22,058 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-10-11 14:11:22,058 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 134 flow [2024-10-11 14:11:22,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:22,059 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:22,059 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-10-11 14:11:22,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 14:11:22,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-11 14:11:22,261 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-11 14:11:22,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:22,263 INFO L85 PathProgramCache]: Analyzing trace with hash -478068286, now seen corresponding path program 1 times [2024-10-11 14:11:22,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:22,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256482647] [2024-10-11 14:11:22,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:22,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:11:22,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:22,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256482647] [2024-10-11 14:11:22,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256482647] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:22,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932535086] [2024-10-11 14:11:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:22,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:22,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:22,383 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:11:22,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:11:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:22,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:11:22,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:11:22,489 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:11:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:11:22,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932535086] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:11:22,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:11:22,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-11 14:11:22,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295338651] [2024-10-11 14:11:22,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:11:22,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:11:22,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:22,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:11:22,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:11:22,535 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-11 14:11:22,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 134 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:22,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:22,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-11 14:11:22,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:22,796 INFO L124 PetriNetUnfolderBase]: 966/1930 cut-off events. [2024-10-11 14:11:22,796 INFO L125 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2024-10-11 14:11:22,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3713 conditions, 1930 events. 966/1930 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 11245 event pairs, 818 based on Foata normal form. 2/1782 useless extension candidates. Maximal degree in co-relation 3675. Up to 1501 conditions per place. [2024-10-11 14:11:22,809 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 28 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2024-10-11 14:11:22,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 47 transitions, 216 flow [2024-10-11 14:11:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:11:22,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:11:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-10-11 14:11:22,811 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-10-11 14:11:22,812 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 134 flow. Second operand 8 states and 139 transitions. [2024-10-11 14:11:22,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 47 transitions, 216 flow [2024-10-11 14:11:22,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:11:22,815 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 166 flow [2024-10-11 14:11:22,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=166, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2024-10-11 14:11:22,816 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-10-11 14:11:22,816 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 166 flow [2024-10-11 14:11:22,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:22,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:22,817 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1] [2024-10-11 14:11:22,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 14:11:23,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:23,019 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-11 14:11:23,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:23,020 INFO L85 PathProgramCache]: Analyzing trace with hash 378366210, now seen corresponding path program 2 times [2024-10-11 14:11:23,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:23,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651705135] [2024-10-11 14:11:23,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:23,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:23,037 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:11:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:23,054 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:11:23,054 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:11:23,054 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-11 14:11:23,054 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-11 14:11:23,054 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-10-11 14:11:23,054 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-11 14:11:23,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 14:11:23,055 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1] [2024-10-11 14:11:23,055 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:11:23,055 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-11 14:11:23,082 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:11:23,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 61 transitions, 140 flow [2024-10-11 14:11:23,090 INFO L124 PetriNetUnfolderBase]: 10/69 cut-off events. [2024-10-11 14:11:23,090 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 14:11:23,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 69 events. 10/69 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 186 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2024-10-11 14:11:23,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 61 transitions, 140 flow [2024-10-11 14:11:23,091 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 61 transitions, 140 flow [2024-10-11 14:11:23,092 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:11:23,093 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@29f4cf9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:11:23,093 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-11 14:11:23,095 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:11:23,095 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-11 14:11:23,095 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 14:11:23,095 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:23,095 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:23,095 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:11:23,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:23,096 INFO L85 PathProgramCache]: Analyzing trace with hash 736650330, now seen corresponding path program 1 times [2024-10-11 14:11:23,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:23,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833594858] [2024-10-11 14:11:23,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:23,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:23,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:23,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833594858] [2024-10-11 14:11:23,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833594858] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:23,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:11:23,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:11:23,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023266162] [2024-10-11 14:11:23,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:23,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:23,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:23,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:23,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:11:23,131 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-10-11 14:11:23,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:23,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:23,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-10-11 14:11:23,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:24,412 INFO L124 PetriNetUnfolderBase]: 8815/14150 cut-off events. [2024-10-11 14:11:24,413 INFO L125 PetriNetUnfolderBase]: For 722/722 co-relation queries the response was YES. [2024-10-11 14:11:24,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26553 conditions, 14150 events. 8815/14150 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 92922 event pairs, 7668 based on Foata normal form. 1558/14142 useless extension candidates. Maximal degree in co-relation 2699. Up to 11966 conditions per place. [2024-10-11 14:11:24,522 INFO L140 encePairwiseOnDemand]: 54/61 looper letters, 37 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-10-11 14:11:24,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 212 flow [2024-10-11 14:11:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:24,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:24,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-10-11 14:11:24,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5519125683060109 [2024-10-11 14:11:24,524 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 140 flow. Second operand 3 states and 101 transitions. [2024-10-11 14:11:24,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 212 flow [2024-10-11 14:11:24,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 210 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-11 14:11:24,529 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 142 flow [2024-10-11 14:11:24,529 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-10-11 14:11:24,530 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2024-10-11 14:11:24,530 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 142 flow [2024-10-11 14:11:24,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:24,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:24,530 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:24,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 14:11:24,531 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:11:24,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:24,533 INFO L85 PathProgramCache]: Analyzing trace with hash 253176913, now seen corresponding path program 1 times [2024-10-11 14:11:24,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:24,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212186061] [2024-10-11 14:11:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:24,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:24,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:24,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212186061] [2024-10-11 14:11:24,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212186061] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:24,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038263998] [2024-10-11 14:11:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:24,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:24,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:24,584 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:11:24,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:11:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:24,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:11:24,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:24,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:11:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:24,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038263998] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:11:24,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:11:24,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 14:11:24,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809106603] [2024-10-11 14:11:24,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:11:24,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:11:24,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:24,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:11:24,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:11:24,703 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-10-11 14:11:24,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:24,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:24,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-10-11 14:11:24,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:26,067 INFO L124 PetriNetUnfolderBase]: 8815/14153 cut-off events. [2024-10-11 14:11:26,067 INFO L125 PetriNetUnfolderBase]: For 426/426 co-relation queries the response was YES. [2024-10-11 14:11:26,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26469 conditions, 14153 events. 8815/14153 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 93027 event pairs, 7668 based on Foata normal form. 0/12587 useless extension candidates. Maximal degree in co-relation 26455. Up to 11966 conditions per place. [2024-10-11 14:11:26,208 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 37 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-10-11 14:11:26,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 238 flow [2024-10-11 14:11:26,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:11:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:11:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-10-11 14:11:26,209 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4344262295081967 [2024-10-11 14:11:26,209 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 142 flow. Second operand 6 states and 159 transitions. [2024-10-11 14:11:26,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 238 flow [2024-10-11 14:11:26,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 234 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:11:26,211 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 174 flow [2024-10-11 14:11:26,212 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=174, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-10-11 14:11:26,213 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 9 predicate places. [2024-10-11 14:11:26,213 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 174 flow [2024-10-11 14:11:26,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:26,213 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:26,213 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:26,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 14:11:26,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 14:11:26,414 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:11:26,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:26,415 INFO L85 PathProgramCache]: Analyzing trace with hash -447337958, now seen corresponding path program 2 times [2024-10-11 14:11:26,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:26,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757274313] [2024-10-11 14:11:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:26,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 14:11:26,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:26,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757274313] [2024-10-11 14:11:26,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757274313] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:26,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:11:26,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:11:26,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359645123] [2024-10-11 14:11:26,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:26,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:26,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:26,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:26,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:11:26,475 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 61 [2024-10-11 14:11:26,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:26,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:26,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 61 [2024-10-11 14:11:26,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:28,434 INFO L124 PetriNetUnfolderBase]: 15165/24285 cut-off events. [2024-10-11 14:11:28,434 INFO L125 PetriNetUnfolderBase]: For 649/649 co-relation queries the response was YES. [2024-10-11 14:11:28,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45550 conditions, 24285 events. 15165/24285 cut-off events. For 649/649 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 175318 event pairs, 6868 based on Foata normal form. 0/21619 useless extension candidates. Maximal degree in co-relation 45514. Up to 10774 conditions per place. [2024-10-11 14:11:28,590 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 72 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2024-10-11 14:11:28,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 394 flow [2024-10-11 14:11:28,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:28,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:28,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-10-11 14:11:28,592 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6830601092896175 [2024-10-11 14:11:28,592 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 174 flow. Second operand 3 states and 125 transitions. [2024-10-11 14:11:28,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 394 flow [2024-10-11 14:11:28,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 380 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 14:11:28,597 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 174 flow [2024-10-11 14:11:28,598 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2024-10-11 14:11:28,599 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2024-10-11 14:11:28,599 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 174 flow [2024-10-11 14:11:28,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:28,599 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:28,599 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:28,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 14:11:28,600 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:11:28,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:28,600 INFO L85 PathProgramCache]: Analyzing trace with hash 615573716, now seen corresponding path program 1 times [2024-10-11 14:11:28,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:28,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674052148] [2024-10-11 14:11:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:28,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 14:11:28,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:28,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674052148] [2024-10-11 14:11:28,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674052148] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:28,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:11:28,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:11:28,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557620253] [2024-10-11 14:11:28,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:28,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:28,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:28,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:28,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:11:28,672 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 61 [2024-10-11 14:11:28,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:28,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:28,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 61 [2024-10-11 14:11:28,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:31,767 INFO L124 PetriNetUnfolderBase]: 26272/41960 cut-off events. [2024-10-11 14:11:31,768 INFO L125 PetriNetUnfolderBase]: For 5525/5525 co-relation queries the response was YES. [2024-10-11 14:11:31,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81914 conditions, 41960 events. 26272/41960 cut-off events. For 5525/5525 co-relation queries the response was YES. Maximal size of possible extension queue 1361. Compared 326172 event pairs, 11890 based on Foata normal form. 0/38398 useless extension candidates. Maximal degree in co-relation 81883. Up to 18619 conditions per place. [2024-10-11 14:11:32,028 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 75 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-10-11 14:11:32,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 409 flow [2024-10-11 14:11:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:32,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:32,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-10-11 14:11:32,031 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6775956284153005 [2024-10-11 14:11:32,031 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 174 flow. Second operand 3 states and 124 transitions. [2024-10-11 14:11:32,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 409 flow [2024-10-11 14:11:32,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 401 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:11:32,081 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 184 flow [2024-10-11 14:11:32,081 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-10-11 14:11:32,083 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2024-10-11 14:11:32,083 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 184 flow [2024-10-11 14:11:32,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:32,083 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:32,084 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:32,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 14:11:32,084 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:11:32,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:32,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1682315564, now seen corresponding path program 1 times [2024-10-11 14:11:32,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:32,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822543734] [2024-10-11 14:11:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:32,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:11:32,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:32,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822543734] [2024-10-11 14:11:32,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822543734] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:32,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244411606] [2024-10-11 14:11:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:32,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:32,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:32,165 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:11:32,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:11:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:32,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:11:32,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:32,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:11:32,277 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:11:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:11:32,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244411606] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:11:32,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:11:32,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-11 14:11:32,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188631589] [2024-10-11 14:11:32,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:11:32,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:11:32,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:32,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:11:32,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:11:32,321 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-10-11 14:11:32,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 184 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:32,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:32,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-10-11 14:11:32,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:35,352 INFO L124 PetriNetUnfolderBase]: 26512/42563 cut-off events. [2024-10-11 14:11:35,353 INFO L125 PetriNetUnfolderBase]: For 6954/6954 co-relation queries the response was YES. [2024-10-11 14:11:35,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84762 conditions, 42563 events. 26512/42563 cut-off events. For 6954/6954 co-relation queries the response was YES. Maximal size of possible extension queue 1389. Compared 332214 event pairs, 22914 based on Foata normal form. 2/39877 useless extension candidates. Maximal degree in co-relation 84722. Up to 35624 conditions per place. [2024-10-11 14:11:35,624 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 41 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-10-11 14:11:35,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 65 transitions, 292 flow [2024-10-11 14:11:35,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:11:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:11:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-10-11 14:11:35,626 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4057377049180328 [2024-10-11 14:11:35,626 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 184 flow. Second operand 8 states and 198 transitions. [2024-10-11 14:11:35,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 65 transitions, 292 flow [2024-10-11 14:11:35,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 65 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:11:35,679 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 216 flow [2024-10-11 14:11:35,679 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=216, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2024-10-11 14:11:35,680 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 21 predicate places. [2024-10-11 14:11:35,680 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 216 flow [2024-10-11 14:11:35,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:35,680 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:35,680 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:35,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 14:11:35,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:35,883 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:11:35,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:35,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1343367604, now seen corresponding path program 2 times [2024-10-11 14:11:35,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:35,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233969106] [2024-10-11 14:11:35,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:35,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:35,903 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:11:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:35,924 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:11:35,925 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:11:35,925 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-11 14:11:35,925 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-10-11 14:11:35,925 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-10-11 14:11:35,926 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-10-11 14:11:35,926 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-10-11 14:11:35,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 14:11:35,926 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2024-10-11 14:11:35,927 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:11:35,927 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-11 14:11:35,969 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:11:35,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 79 transitions, 186 flow [2024-10-11 14:11:35,982 INFO L124 PetriNetUnfolderBase]: 13/90 cut-off events. [2024-10-11 14:11:35,982 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-11 14:11:35,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 90 events. 13/90 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 270 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 79. Up to 5 conditions per place. [2024-10-11 14:11:35,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 79 transitions, 186 flow [2024-10-11 14:11:35,983 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 79 transitions, 186 flow [2024-10-11 14:11:35,984 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:11:35,984 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@29f4cf9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:11:35,985 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-11 14:11:35,987 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:11:35,987 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-11 14:11:35,987 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 14:11:35,988 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:35,988 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:35,988 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:11:35,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:35,988 INFO L85 PathProgramCache]: Analyzing trace with hash 431376299, now seen corresponding path program 1 times [2024-10-11 14:11:35,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:35,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445499124] [2024-10-11 14:11:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:35,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:36,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:36,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445499124] [2024-10-11 14:11:36,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445499124] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:36,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:11:36,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:11:36,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877413096] [2024-10-11 14:11:36,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:36,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:36,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:36,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:36,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:11:36,017 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-10-11 14:11:36,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:36,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:36,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-10-11 14:11:36,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:48,435 INFO L124 PetriNetUnfolderBase]: 121273/173906 cut-off events. [2024-10-11 14:11:48,435 INFO L125 PetriNetUnfolderBase]: For 12414/12414 co-relation queries the response was YES. [2024-10-11 14:11:48,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332310 conditions, 173906 events. 121273/173906 cut-off events. For 12414/12414 co-relation queries the response was YES. Maximal size of possible extension queue 4234. Compared 1306096 event pairs, 106668 based on Foata normal form. 22182/177004 useless extension candidates. Maximal degree in co-relation 26653. Up to 152966 conditions per place. [2024-10-11 14:11:49,513 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 48 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-10-11 14:11:49,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 278 flow [2024-10-11 14:11:49,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:49,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-10-11 14:11:49,515 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5527426160337553 [2024-10-11 14:11:49,515 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 186 flow. Second operand 3 states and 131 transitions. [2024-10-11 14:11:49,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 278 flow [2024-10-11 14:11:49,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 272 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-11 14:11:49,521 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 182 flow [2024-10-11 14:11:49,521 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2024-10-11 14:11:49,522 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2024-10-11 14:11:49,522 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 182 flow [2024-10-11 14:11:49,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:49,522 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:49,522 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:49,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-11 14:11:49,522 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:11:49,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:49,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1107078927, now seen corresponding path program 1 times [2024-10-11 14:11:49,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:49,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319016241] [2024-10-11 14:11:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:49,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:49,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:49,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319016241] [2024-10-11 14:11:49,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319016241] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:49,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155409694] [2024-10-11 14:11:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:49,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:49,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:49,862 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:11:49,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:11:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:49,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:11:49,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:49,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:11:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:50,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155409694] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:11:50,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:11:50,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 14:11:50,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493907179] [2024-10-11 14:11:50,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:11:50,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:11:50,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:50,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:11:50,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:11:50,008 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-10-11 14:11:50,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 26.714285714285715) internal successors, (187), 7 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:50,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:50,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-10-11 14:11:50,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:12:02,001 INFO L124 PetriNetUnfolderBase]: 121273/173909 cut-off events. [2024-10-11 14:12:02,001 INFO L125 PetriNetUnfolderBase]: For 5190/5190 co-relation queries the response was YES. [2024-10-11 14:12:02,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330226 conditions, 173909 events. 121273/173909 cut-off events. For 5190/5190 co-relation queries the response was YES. Maximal size of possible extension queue 4234. Compared 1306226 event pairs, 106668 based on Foata normal form. 0/154825 useless extension candidates. Maximal degree in co-relation 330211. Up to 152966 conditions per place. [2024-10-11 14:12:03,074 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 48 selfloop transitions, 5 changer transitions 0/78 dead transitions. [2024-10-11 14:12:03,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 300 flow [2024-10-11 14:12:03,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:12:03,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:12:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 206 transitions. [2024-10-11 14:12:03,076 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4345991561181435 [2024-10-11 14:12:03,076 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 182 flow. Second operand 6 states and 206 transitions. [2024-10-11 14:12:03,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 300 flow [2024-10-11 14:12:03,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 78 transitions, 296 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:12:03,096 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 214 flow [2024-10-11 14:12:03,096 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2024-10-11 14:12:03,096 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 9 predicate places. [2024-10-11 14:12:03,096 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 214 flow [2024-10-11 14:12:03,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.714285714285715) internal successors, (187), 7 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:12:03,097 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:12:03,097 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:12:03,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 14:12:03,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 14:12:03,298 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:12:03,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:12:03,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1230072107, now seen corresponding path program 2 times [2024-10-11 14:12:03,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:12:03,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287141024] [2024-10-11 14:12:03,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:12:03,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:12:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:12:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:12:03,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:12:03,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287141024] [2024-10-11 14:12:03,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287141024] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:12:03,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719346258] [2024-10-11 14:12:03,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:12:03,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:12:03,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:12:03,371 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:12:03,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:12:03,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 14:12:03,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:12:03,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-11 14:12:03,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:12:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 14:12:03,471 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:12:03,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719346258] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:12:03,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:12:03,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-10-11 14:12:03,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59402809] [2024-10-11 14:12:03,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:12:03,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:12:03,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:12:03,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:12:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:12:03,476 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 79 [2024-10-11 14:12:03,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:12:03,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:12:03,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 79 [2024-10-11 14:12:03,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand