./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c4f91361 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-c4f9136-m [2023-11-23 15:22:45,837 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 15:22:45,906 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 15:22:45,912 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 15:22:45,912 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 15:22:45,944 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 15:22:45,945 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 15:22:45,945 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 15:22:45,945 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 15:22:45,946 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 15:22:45,946 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 15:22:45,947 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 15:22:45,947 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 15:22:45,947 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 15:22:45,948 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 15:22:45,948 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 15:22:45,949 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 15:22:45,949 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 15:22:45,949 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 15:22:45,950 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 15:22:45,950 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 15:22:45,951 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 15:22:45,951 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 15:22:45,951 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 15:22:45,952 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 15:22:45,952 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 15:22:45,952 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 15:22:45,953 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 15:22:45,953 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 15:22:45,953 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 15:22:45,954 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 15:22:45,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 15:22:45,955 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 15:22:45,955 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 15:22:45,955 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 15:22:45,956 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 15:22:45,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 15:22:45,956 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 15:22:45,957 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 15:22:45,957 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 15:22:45,958 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 15:22:45,958 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 15:22:45,958 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/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2023-11-23 15:22:46,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 15:22:46,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 15:22:46,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 15:22:46,215 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 15:22:46,216 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 15:22:46,217 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-23 15:22:47,423 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 15:22:47,727 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 15:22:47,728 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-23 15:22:47,754 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/971cc5b9b/c8811ae04d534010a6262d4252f5478c/FLAGf5b27e7e4 [2023-11-23 15:22:47,785 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/971cc5b9b/c8811ae04d534010a6262d4252f5478c [2023-11-23 15:22:47,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 15:22:47,789 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 15:22:47,790 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 15:22:47,791 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 15:22:47,795 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 15:22:47,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:22:47" (1/1) ... [2023-11-23 15:22:47,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54d8f308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:22:47, skipping insertion in model container [2023-11-23 15:22:47,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:22:47" (1/1) ... [2023-11-23 15:22:47,867 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 15:22:48,018 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-11-23 15:22:48,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 15:22:48,271 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 15:22:48,280 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-11-23 15:22:48,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 15:22:48,369 INFO L206 MainTranslator]: Completed translation [2023-11-23 15:22:48,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:22:48 WrapperNode [2023-11-23 15:22:48,370 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 15:22:48,371 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 15:22:48,371 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 15:22:48,371 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 15:22:48,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:22:48" (1/1) ... [2023-11-23 15:22:48,401 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:22:48" (1/1) ... [2023-11-23 15:22:48,423 INFO L138 Inliner]: procedures = 365, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-11-23 15:22:48,425 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 15:22:48,426 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 15:22:48,426 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 15:22:48,426 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 15:22:48,434 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:22:48" (1/1) ... [2023-11-23 15:22:48,434 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:22:48" (1/1) ... [2023-11-23 15:22:48,437 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:22:48" (1/1) ... [2023-11-23 15:22:48,466 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 1 writes are split as follows [0, 0, 1]. [2023-11-23 15:22:48,466 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:22:48" (1/1) ... [2023-11-23 15:22:48,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:22:48" (1/1) ... [2023-11-23 15:22:48,476 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:22:48" (1/1) ... [2023-11-23 15:22:48,480 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:22:48" (1/1) ... [2023-11-23 15:22:48,484 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:22:48" (1/1) ... [2023-11-23 15:22:48,496 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:22:48" (1/1) ... [2023-11-23 15:22:48,498 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 15:22:48,499 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 15:22:48,499 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 15:22:48,499 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 15:22:48,500 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:22:48" (1/1) ... [2023-11-23 15:22:48,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 15:22:48,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:22:48,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 15:22:48,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 15:22:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 15:22:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 15:22:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-23 15:22:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 15:22:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 15:22:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 15:22:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 15:22:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 15:22:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 15:22:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-23 15:22:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 15:22:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2023-11-23 15:22:48,597 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2023-11-23 15:22:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 15:22:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 15:22:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 15:22:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 15:22:48,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 15:22:48,601 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 15:22:48,753 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 15:22:48,754 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 15:22:48,957 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 15:22:49,084 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 15:22:49,084 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 15:22:49,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:22:49 BoogieIcfgContainer [2023-11-23 15:22:49,085 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 15:22:49,086 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 15:22:49,087 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 15:22:49,098 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 15:22:49,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:22:47" (1/3) ... [2023-11-23 15:22:49,099 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a296d8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:22:49, skipping insertion in model container [2023-11-23 15:22:49,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:22:48" (2/3) ... [2023-11-23 15:22:49,099 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a296d8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:22:49, skipping insertion in model container [2023-11-23 15:22:49,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:22:49" (3/3) ... [2023-11-23 15:22:49,101 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2023-11-23 15:22:49,107 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 15:22:49,115 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 15:22:49,115 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 15:22:49,116 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 15:22:49,147 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-23 15:22:49,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 24 transitions, 55 flow [2023-11-23 15:22:49,206 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-11-23 15:22:49,207 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-23 15:22:49,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 23 events. 3/23 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2023-11-23 15:22:49,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 24 transitions, 55 flow [2023-11-23 15:22:49,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 20 transitions, 46 flow [2023-11-23 15:22:49,223 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 15:22:49,229 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@2ccda102, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 15:22:49,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 15:22:49,245 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 15:22:49,245 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-11-23 15:22:49,245 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-23 15:22:49,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:22:49,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:22:49,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 15:22:49,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:22:49,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1428559675, now seen corresponding path program 1 times [2023-11-23 15:22:49,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:22:49,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184072676] [2023-11-23 15:22:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:22:49,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:22:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:22:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:22:49,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:22:49,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184072676] [2023-11-23 15:22:49,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184072676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:22:49,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:22:49,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 15:22:49,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843039894] [2023-11-23 15:22:49,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:22:49,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:22:49,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:22:49,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:22:49,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:22:49,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2023-11-23 15:22:49,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 46 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) [2023-11-23 15:22:49,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:22:49,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2023-11-23 15:22:49,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:22:49,672 INFO L124 PetriNetUnfolderBase]: 61/133 cut-off events. [2023-11-23 15:22:49,675 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-23 15:22:49,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 133 events. 61/133 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 398 event pairs, 27 based on Foata normal form. 6/138 useless extension candidates. Maximal degree in co-relation 247. Up to 77 conditions per place. [2023-11-23 15:22:49,680 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 24 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-11-23 15:22:49,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 118 flow [2023-11-23 15:22:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:22:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 15:22:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2023-11-23 15:22:49,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-23 15:22:49,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 45 transitions. [2023-11-23 15:22:49,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 45 transitions. [2023-11-23 15:22:49,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:22:49,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 45 transitions. [2023-11-23 15:22:49,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-23 15:22:49,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:49,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:49,707 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 46 flow. Second operand 3 states and 45 transitions. [2023-11-23 15:22:49,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 118 flow [2023-11-23 15:22:49,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 15:22:49,712 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 54 flow [2023-11-23 15:22:49,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-23 15:22:49,719 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-11-23 15:22:49,720 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 54 flow [2023-11-23 15:22:49,720 INFO L496 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) [2023-11-23 15:22:49,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:22:49,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:22:49,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 15:22:49,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 15:22:49,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:22:49,722 INFO L85 PathProgramCache]: Analyzing trace with hash 186676813, now seen corresponding path program 1 times [2023-11-23 15:22:49,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:22:49,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771155520] [2023-11-23 15:22:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:22:49,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:22:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:22:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:22:49,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:22:49,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771155520] [2023-11-23 15:22:49,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771155520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:22:49,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:22:49,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 15:22:49,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711541185] [2023-11-23 15:22:49,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:22:49,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:22:49,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:22:49,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:22:49,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:22:49,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2023-11-23 15:22:49,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:49,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:22:49,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2023-11-23 15:22:49,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:22:49,896 INFO L124 PetriNetUnfolderBase]: 101/223 cut-off events. [2023-11-23 15:22:49,898 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-23 15:22:49,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 223 events. 101/223 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 827 event pairs, 45 based on Foata normal form. 10/233 useless extension candidates. Maximal degree in co-relation 147. Up to 125 conditions per place. [2023-11-23 15:22:49,901 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-11-23 15:22:49,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 32 transitions, 142 flow [2023-11-23 15:22:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:22:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 15:22:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2023-11-23 15:22:49,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-23 15:22:49,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 45 transitions. [2023-11-23 15:22:49,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 45 transitions. [2023-11-23 15:22:49,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:22:49,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 45 transitions. [2023-11-23 15:22:49,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-23 15:22:49,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:49,911 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:49,911 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2023-11-23 15:22:49,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 32 transitions, 142 flow [2023-11-23 15:22:49,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 32 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 15:22:49,914 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 64 flow [2023-11-23 15:22:49,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2023-11-23 15:22:49,917 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-11-23 15:22:49,917 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 64 flow [2023-11-23 15:22:49,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:49,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:22:49,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:22:49,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 15:22:49,918 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 15:22:49,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:22:49,919 INFO L85 PathProgramCache]: Analyzing trace with hash -791721388, now seen corresponding path program 1 times [2023-11-23 15:22:49,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:22:49,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008320634] [2023-11-23 15:22:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:22:49,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:22:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:22:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:22:50,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:22:50,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008320634] [2023-11-23 15:22:50,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008320634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:22:50,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:22:50,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 15:22:50,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071257162] [2023-11-23 15:22:50,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:22:50,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:22:50,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:22:50,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:22:50,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:22:50,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2023-11-23 15:22:50,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:50,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:22:50,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2023-11-23 15:22:50,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:22:50,194 INFO L124 PetriNetUnfolderBase]: 69/170 cut-off events. [2023-11-23 15:22:50,194 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-23 15:22:50,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 170 events. 69/170 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 529 event pairs, 25 based on Foata normal form. 16/185 useless extension candidates. Maximal degree in co-relation 132. Up to 80 conditions per place. [2023-11-23 15:22:50,199 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 22 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2023-11-23 15:22:50,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 150 flow [2023-11-23 15:22:50,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:22:50,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 15:22:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2023-11-23 15:22:50,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-23 15:22:50,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2023-11-23 15:22:50,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2023-11-23 15:22:50,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:22:50,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2023-11-23 15:22:50,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:50,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:50,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:50,208 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 64 flow. Second operand 3 states and 42 transitions. [2023-11-23 15:22:50,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 150 flow [2023-11-23 15:22:50,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 15:22:50,210 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 70 flow [2023-11-23 15:22:50,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-11-23 15:22:50,212 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 4 predicate places. [2023-11-23 15:22:50,212 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 70 flow [2023-11-23 15:22:50,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:50,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:22:50,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:22:50,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 15:22:50,213 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 15:22:50,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:22:50,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1020515750, now seen corresponding path program 2 times [2023-11-23 15:22:50,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:22:50,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001334760] [2023-11-23 15:22:50,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:22:50,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:22:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:22:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:22:50,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:22:50,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001334760] [2023-11-23 15:22:50,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001334760] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:22:50,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053963257] [2023-11-23 15:22:50,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 15:22:50,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:22:50,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:22:50,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:22:50,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 15:22:50,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 15:22:50,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:22:50,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 15:22:50,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:22:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:22:50,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:22:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:22:50,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053963257] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:22:50,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:22:50,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-23 15:22:50,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951664767] [2023-11-23 15:22:50,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:22:50,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 15:22:50,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:22:50,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 15:22:50,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 15:22:50,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-23 15:22:50,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:50,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:22:50,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-23 15:22:50,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:22:50,702 INFO L124 PetriNetUnfolderBase]: 167/374 cut-off events. [2023-11-23 15:22:50,703 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-11-23 15:22:50,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 374 events. 167/374 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1301 event pairs, 14 based on Foata normal form. 30/404 useless extension candidates. Maximal degree in co-relation 261. Up to 86 conditions per place. [2023-11-23 15:22:50,706 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 56 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2023-11-23 15:22:50,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 65 transitions, 344 flow [2023-11-23 15:22:50,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 15:22:50,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 15:22:50,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2023-11-23 15:22:50,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-23 15:22:50,709 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 90 transitions. [2023-11-23 15:22:50,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 90 transitions. [2023-11-23 15:22:50,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:22:50,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 90 transitions. [2023-11-23 15:22:50,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:50,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:50,712 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:50,713 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 70 flow. Second operand 6 states and 90 transitions. [2023-11-23 15:22:50,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 65 transitions, 344 flow [2023-11-23 15:22:50,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 65 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 15:22:50,716 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 106 flow [2023-11-23 15:22:50,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=106, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-11-23 15:22:50,717 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 12 predicate places. [2023-11-23 15:22:50,717 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 106 flow [2023-11-23 15:22:50,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:50,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:22:50,718 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:22:50,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 15:22:50,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:22:50,933 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 15:22:50,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:22:50,933 INFO L85 PathProgramCache]: Analyzing trace with hash -660696479, now seen corresponding path program 3 times [2023-11-23 15:22:50,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:22:50,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067399755] [2023-11-23 15:22:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:22:50,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:22:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:22:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 15:22:51,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:22:51,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067399755] [2023-11-23 15:22:51,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067399755] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:22:51,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932752334] [2023-11-23 15:22:51,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 15:22:51,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:22:51,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:22:51,047 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:22:51,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 15:22:51,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 15:22:51,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:22:51,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 15:22:51,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:22:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 15:22:51,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:22:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 15:22:51,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932752334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:22:51,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:22:51,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-23 15:22:51,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359038982] [2023-11-23 15:22:51,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:22:51,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 15:22:51,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:22:51,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 15:22:51,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 15:22:51,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-23 15:22:51,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 106 flow. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:51,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:22:51,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-23 15:22:51,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:22:51,373 INFO L124 PetriNetUnfolderBase]: 294/694 cut-off events. [2023-11-23 15:22:51,373 INFO L125 PetriNetUnfolderBase]: For 864/864 co-relation queries the response was YES. [2023-11-23 15:22:51,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 694 events. 294/694 cut-off events. For 864/864 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2891 event pairs, 51 based on Foata normal form. 57/751 useless extension candidates. Maximal degree in co-relation 1232. Up to 156 conditions per place. [2023-11-23 15:22:51,378 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-11-23 15:22:51,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 76 transitions, 514 flow [2023-11-23 15:22:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 15:22:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 15:22:51,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2023-11-23 15:22:51,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-23 15:22:51,381 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 90 transitions. [2023-11-23 15:22:51,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 90 transitions. [2023-11-23 15:22:51,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:22:51,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 90 transitions. [2023-11-23 15:22:51,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:51,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:51,385 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:51,385 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 106 flow. Second operand 6 states and 90 transitions. [2023-11-23 15:22:51,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 76 transitions, 514 flow [2023-11-23 15:22:51,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 76 transitions, 474 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-11-23 15:22:51,393 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 138 flow [2023-11-23 15:22:51,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=138, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-11-23 15:22:51,395 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2023-11-23 15:22:51,395 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 138 flow [2023-11-23 15:22:51,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:51,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:22:51,395 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:22:51,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 15:22:51,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:22:51,615 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 15:22:51,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:22:51,616 INFO L85 PathProgramCache]: Analyzing trace with hash 478578983, now seen corresponding path program 4 times [2023-11-23 15:22:51,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:22:51,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483733740] [2023-11-23 15:22:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:22:51,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:22:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:22:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 15:22:51,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:22:51,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483733740] [2023-11-23 15:22:51,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483733740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:22:51,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633476230] [2023-11-23 15:22:51,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 15:22:51,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:22:51,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:22:51,786 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:22:51,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 15:22:51,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 15:22:51,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:22:51,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 15:22:51,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:22:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 15:22:52,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:22:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 15:22:52,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633476230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:22:52,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:22:52,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-23 15:22:52,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353567600] [2023-11-23 15:22:52,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:22:52,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 15:22:52,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:22:52,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 15:22:52,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-11-23 15:22:52,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-23 15:22:52,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 138 flow. Second operand has 17 states, 17 states have (on average 10.294117647058824) internal successors, (175), 17 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:52,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:22:52,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-23 15:22:52,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:22:53,367 INFO L124 PetriNetUnfolderBase]: 899/2078 cut-off events. [2023-11-23 15:22:53,368 INFO L125 PetriNetUnfolderBase]: For 3911/3911 co-relation queries the response was YES. [2023-11-23 15:22:53,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6873 conditions, 2078 events. 899/2078 cut-off events. For 3911/3911 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 10179 event pairs, 14 based on Foata normal form. 209/2287 useless extension candidates. Maximal degree in co-relation 3345. Up to 371 conditions per place. [2023-11-23 15:22:53,382 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 470 selfloop transitions, 138 changer transitions 0/612 dead transitions. [2023-11-23 15:22:53,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 612 transitions, 3744 flow [2023-11-23 15:22:53,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-23 15:22:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-23 15:22:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 990 transitions. [2023-11-23 15:22:53,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156716417910447 [2023-11-23 15:22:53,387 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 990 transitions. [2023-11-23 15:22:53,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 990 transitions. [2023-11-23 15:22:53,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:22:53,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 990 transitions. [2023-11-23 15:22:53,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 14.776119402985074) internal successors, (990), 67 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:53,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 24.0) internal successors, (1632), 68 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:53,394 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 24.0) internal successors, (1632), 68 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:53,394 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 138 flow. Second operand 67 states and 990 transitions. [2023-11-23 15:22:53,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 612 transitions, 3744 flow [2023-11-23 15:22:53,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 612 transitions, 3624 flow, removed 54 selfloop flow, removed 1 redundant places. [2023-11-23 15:22:53,408 INFO L231 Difference]: Finished difference. Result has 153 places, 167 transitions, 1564 flow [2023-11-23 15:22:53,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=1564, PETRI_PLACES=153, PETRI_TRANSITIONS=167} [2023-11-23 15:22:53,409 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 131 predicate places. [2023-11-23 15:22:53,409 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 167 transitions, 1564 flow [2023-11-23 15:22:53,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.294117647058824) internal successors, (175), 17 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:53,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:22:53,410 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:22:53,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 15:22:53,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:22:53,626 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 15:22:53,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:22:53,631 INFO L85 PathProgramCache]: Analyzing trace with hash 914665606, now seen corresponding path program 5 times [2023-11-23 15:22:53,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:22:53,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194634149] [2023-11-23 15:22:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:22:53,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:22:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:22:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-23 15:22:53,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:22:53,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194634149] [2023-11-23 15:22:53,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194634149] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:22:53,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236649439] [2023-11-23 15:22:53,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 15:22:53,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:22:53,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:22:53,840 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:22:53,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 15:22:54,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-23 15:22:54,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:22:54,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 15:22:54,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:22:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-23 15:22:54,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:22:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-23 15:22:54,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236649439] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:22:54,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:22:54,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-23 15:22:54,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042875233] [2023-11-23 15:22:54,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:22:54,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 15:22:54,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:22:54,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 15:22:54,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-11-23 15:22:54,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-23 15:22:54,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 167 transitions, 1564 flow. Second operand has 15 states, 15 states have (on average 10.0) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:54,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:22:54,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-23 15:22:54,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:22:55,377 INFO L124 PetriNetUnfolderBase]: 1737/4098 cut-off events. [2023-11-23 15:22:55,378 INFO L125 PetriNetUnfolderBase]: For 95207/95207 co-relation queries the response was YES. [2023-11-23 15:22:55,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18137 conditions, 4098 events. 1737/4098 cut-off events. For 95207/95207 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 22982 event pairs, 166 based on Foata normal form. 301/4389 useless extension candidates. Maximal degree in co-relation 16184. Up to 693 conditions per place. [2023-11-23 15:22:55,431 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 248 selfloop transitions, 144 changer transitions 0/402 dead transitions. [2023-11-23 15:22:55,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 402 transitions, 4818 flow [2023-11-23 15:22:55,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 15:22:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-23 15:22:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 222 transitions. [2023-11-23 15:22:55,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2023-11-23 15:22:55,433 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 222 transitions. [2023-11-23 15:22:55,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 222 transitions. [2023-11-23 15:22:55,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:22:55,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 222 transitions. [2023-11-23 15:22:55,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 15.857142857142858) internal successors, (222), 14 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:55,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:55,436 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:55,436 INFO L175 Difference]: Start difference. First operand has 153 places, 167 transitions, 1564 flow. Second operand 14 states and 222 transitions. [2023-11-23 15:22:55,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 402 transitions, 4818 flow [2023-11-23 15:22:55,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 402 transitions, 4674 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-23 15:22:55,636 INFO L231 Difference]: Finished difference. Result has 168 places, 234 transitions, 2478 flow [2023-11-23 15:22:55,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2478, PETRI_PLACES=168, PETRI_TRANSITIONS=234} [2023-11-23 15:22:55,637 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 146 predicate places. [2023-11-23 15:22:55,638 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 234 transitions, 2478 flow [2023-11-23 15:22:55,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.0) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:55,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:22:55,638 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:22:55,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 15:22:55,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:22:55,855 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 15:22:55,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:22:55,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1025122131, now seen corresponding path program 6 times [2023-11-23 15:22:55,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:22:55,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154466514] [2023-11-23 15:22:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:22:55,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:22:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:22:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-23 15:22:56,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:22:56,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154466514] [2023-11-23 15:22:56,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154466514] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:22:56,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311596904] [2023-11-23 15:22:56,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 15:22:56,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:22:56,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:22:56,414 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:22:56,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 15:22:56,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-23 15:22:56,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:22:56,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 15:22:56,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:22:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-23 15:22:56,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:22:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-23 15:22:57,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311596904] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:22:57,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:22:57,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 35 [2023-11-23 15:22:57,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113513971] [2023-11-23 15:22:57,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:22:57,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-23 15:22:57,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:22:57,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-23 15:22:57,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2023-11-23 15:22:57,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-23 15:22:57,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 234 transitions, 2478 flow. Second operand has 35 states, 35 states have (on average 9.742857142857142) internal successors, (341), 35 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:22:57,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:22:57,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-23 15:22:57,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:23:10,513 INFO L124 PetriNetUnfolderBase]: 3735/8734 cut-off events. [2023-11-23 15:23:10,513 INFO L125 PetriNetUnfolderBase]: For 539787/539787 co-relation queries the response was YES. [2023-11-23 15:23:10,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41311 conditions, 8734 events. 3735/8734 cut-off events. For 539787/539787 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 53725 event pairs, 12 based on Foata normal form. 683/9417 useless extension candidates. Maximal degree in co-relation 37090. Up to 1545 conditions per place. [2023-11-23 15:23:10,589 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 2072 selfloop transitions, 742 changer transitions 0/2819 dead transitions. [2023-11-23 15:23:10,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 2819 transitions, 23814 flow [2023-11-23 15:23:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2023-11-23 15:23:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2023-11-23 15:23:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 4300 transitions. [2023-11-23 15:23:10,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6073446327683616 [2023-11-23 15:23:10,603 INFO L72 ComplementDD]: Start complementDD. Operand 295 states and 4300 transitions. [2023-11-23 15:23:10,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 295 states and 4300 transitions. [2023-11-23 15:23:10,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:23:10,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 295 states and 4300 transitions. [2023-11-23 15:23:10,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 296 states, 295 states have (on average 14.576271186440678) internal successors, (4300), 295 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:23:10,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 296 states, 296 states have (on average 24.0) internal successors, (7104), 296 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:23:10,631 INFO L81 ComplementDD]: Finished complementDD. Result has 296 states, 296 states have (on average 24.0) internal successors, (7104), 296 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:23:10,631 INFO L175 Difference]: Start difference. First operand has 168 places, 234 transitions, 2478 flow. Second operand 295 states and 4300 transitions. [2023-11-23 15:23:10,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 2819 transitions, 23814 flow [2023-11-23 15:23:10,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 2819 transitions, 23504 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-23 15:23:10,932 INFO L231 Difference]: Finished difference. Result has 621 places, 798 transitions, 11120 flow [2023-11-23 15:23:10,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2368, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=295, PETRI_FLOW=11120, PETRI_PLACES=621, PETRI_TRANSITIONS=798} [2023-11-23 15:23:10,934 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 599 predicate places. [2023-11-23 15:23:10,934 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 798 transitions, 11120 flow [2023-11-23 15:23:10,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.742857142857142) internal successors, (341), 35 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:23:10,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:23:10,934 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:23:10,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 15:23:11,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:23:11,151 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 15:23:11,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:23:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1474069254, now seen corresponding path program 7 times [2023-11-23 15:23:11,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:23:11,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124439273] [2023-11-23 15:23:11,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:23:11,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:23:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:23:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 20 proven. 403 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-23 15:23:11,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:23:11,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124439273] [2023-11-23 15:23:11,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124439273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:23:11,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217363615] [2023-11-23 15:23:11,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 15:23:11,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:23:11,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:23:11,685 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:23:11,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 15:23:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:23:11,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 15:23:11,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:23:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 20 proven. 403 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-23 15:23:12,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:23:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 20 proven. 403 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-23 15:23:12,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217363615] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:23:12,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:23:12,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 23 [2023-11-23 15:23:12,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529848377] [2023-11-23 15:23:12,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:23:12,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 15:23:12,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:23:12,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 15:23:12,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-11-23 15:23:12,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-23 15:23:12,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 798 transitions, 11120 flow. Second operand has 23 states, 23 states have (on average 10.217391304347826) internal successors, (235), 23 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:23:12,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:23:12,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-23 15:23:12,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:23:19,150 INFO L124 PetriNetUnfolderBase]: 5495/13508 cut-off events. [2023-11-23 15:23:19,150 INFO L125 PetriNetUnfolderBase]: For 2387531/2387531 co-relation queries the response was YES. [2023-11-23 15:23:19,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84423 conditions, 13508 events. 5495/13508 cut-off events. For 2387531/2387531 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 91175 event pairs, 300 based on Foata normal form. 651/14136 useless extension candidates. Maximal degree in co-relation 78065. Up to 2288 conditions per place. [2023-11-23 15:23:19,372 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 610 selfloop transitions, 652 changer transitions 0/1286 dead transitions. [2023-11-23 15:23:19,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 1286 transitions, 25768 flow [2023-11-23 15:23:19,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 15:23:19,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-23 15:23:19,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 350 transitions. [2023-11-23 15:23:19,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6628787878787878 [2023-11-23 15:23:19,374 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 350 transitions. [2023-11-23 15:23:19,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 350 transitions. [2023-11-23 15:23:19,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:23:19,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 350 transitions. [2023-11-23 15:23:19,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 15.909090909090908) internal successors, (350), 22 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:23:19,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:23:19,377 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:23:19,377 INFO L175 Difference]: Start difference. First operand has 621 places, 798 transitions, 11120 flow. Second operand 22 states and 350 transitions. [2023-11-23 15:23:19,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 1286 transitions, 25768 flow [2023-11-23 15:23:24,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 1286 transitions, 24580 flow, removed 165 selfloop flow, removed 60 redundant places. [2023-11-23 15:23:24,634 INFO L231 Difference]: Finished difference. Result has 590 places, 985 transitions, 14490 flow [2023-11-23 15:23:24,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=10190, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=14490, PETRI_PLACES=590, PETRI_TRANSITIONS=985} [2023-11-23 15:23:24,635 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 568 predicate places. [2023-11-23 15:23:24,635 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 985 transitions, 14490 flow [2023-11-23 15:23:24,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.217391304347826) internal successors, (235), 23 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:23:24,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:23:24,636 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:23:24,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 15:23:24,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:23:24,837 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 15:23:24,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:23:24,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1621672001, now seen corresponding path program 8 times [2023-11-23 15:23:24,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:23:24,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282681880] [2023-11-23 15:23:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:23:24,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:23:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:23:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:23:27,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:23:27,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282681880] [2023-11-23 15:23:27,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282681880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:23:27,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084816619] [2023-11-23 15:23:27,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 15:23:27,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:23:27,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:23:27,525 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:23:27,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 15:23:27,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 15:23:27,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:23:27,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 125 conjunts are in the unsatisfiable core [2023-11-23 15:23:27,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:23:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:23:28,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:23:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:23:28,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084816619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:23:28,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:23:28,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 44 [2023-11-23 15:23:28,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545659681] [2023-11-23 15:23:28,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:23:28,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-23 15:23:28,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:23:28,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-23 15:23:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2023-11-23 15:23:28,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2023-11-23 15:23:28,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 985 transitions, 14490 flow. Second operand has 45 states, 45 states have (on average 7.8) internal successors, (351), 45 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:23:28,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:23:28,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2023-11-23 15:23:28,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:23:49,678 INFO L124 PetriNetUnfolderBase]: 9790/24712 cut-off events. [2023-11-23 15:23:49,679 INFO L125 PetriNetUnfolderBase]: For 17335124/17335124 co-relation queries the response was YES. [2023-11-23 15:23:50,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352655 conditions, 24712 events. 9790/24712 cut-off events. For 17335124/17335124 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 195606 event pairs, 1193 based on Foata normal form. 1/24713 useless extension candidates. Maximal degree in co-relation 332853. Up to 4646 conditions per place. [2023-11-23 15:23:50,448 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 3223 selfloop transitions, 83 changer transitions 2/3335 dead transitions. [2023-11-23 15:23:50,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 3335 transitions, 60593 flow [2023-11-23 15:23:50,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-23 15:23:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-23 15:23:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 644 transitions. [2023-11-23 15:23:50,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098484848484849 [2023-11-23 15:23:50,451 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 644 transitions. [2023-11-23 15:23:50,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 644 transitions. [2023-11-23 15:23:50,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:23:50,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 644 transitions. [2023-11-23 15:23:50,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 14.636363636363637) internal successors, (644), 44 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:23:50,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 24.0) internal successors, (1080), 45 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:23:50,455 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 24.0) internal successors, (1080), 45 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:23:50,455 INFO L175 Difference]: Start difference. First operand has 590 places, 985 transitions, 14490 flow. Second operand 44 states and 644 transitions. [2023-11-23 15:23:50,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 3335 transitions, 60593 flow [2023-11-23 15:24:58,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 3335 transitions, 58487 flow, removed 0 selfloop flow, removed 13 redundant places. [2023-11-23 15:24:58,309 INFO L231 Difference]: Finished difference. Result has 622 places, 1067 transitions, 14026 flow [2023-11-23 15:24:58,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13684, PETRI_DIFFERENCE_MINUEND_PLACES=577, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=985, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=982, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=14026, PETRI_PLACES=622, PETRI_TRANSITIONS=1067} [2023-11-23 15:24:58,310 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 600 predicate places. [2023-11-23 15:24:58,310 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 1067 transitions, 14026 flow [2023-11-23 15:24:58,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 7.8) internal successors, (351), 45 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:24:58,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:24:58,311 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:24:58,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 15:24:58,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:24:58,512 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 15:24:58,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:24:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1629730135, now seen corresponding path program 9 times [2023-11-23 15:24:58,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:24:58,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138923677] [2023-11-23 15:24:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:24:58,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:24:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:24:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2041 backedges. 975 proven. 116 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-23 15:24:59,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:24:59,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138923677] [2023-11-23 15:24:59,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138923677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:24:59,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164839186] [2023-11-23 15:24:59,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 15:24:59,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:24:59,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:24:59,250 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:24:59,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 15:24:59,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2023-11-23 15:24:59,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:24:59,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 15:24:59,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:25:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2041 backedges. 1091 proven. 0 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-23 15:25:00,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:25:00,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164839186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:25:00,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:25:00,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2023-11-23 15:25:00,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556371566] [2023-11-23 15:25:00,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:25:00,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 15:25:00,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:25:00,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 15:25:00,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2023-11-23 15:25:00,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-23 15:25:00,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 1067 transitions, 14026 flow. Second operand has 23 states, 23 states have (on average 10.08695652173913) internal successors, (232), 23 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:25:00,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:25:00,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-23 15:25:00,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:25:11,280 INFO L124 PetriNetUnfolderBase]: 9149/21080 cut-off events. [2023-11-23 15:25:11,280 INFO L125 PetriNetUnfolderBase]: For 3106188/3106188 co-relation queries the response was YES. [2023-11-23 15:25:11,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183763 conditions, 21080 events. 9149/21080 cut-off events. For 3106188/3106188 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 157395 event pairs, 155 based on Foata normal form. 89/21169 useless extension candidates. Maximal degree in co-relation 183518. Up to 4121 conditions per place. [2023-11-23 15:25:12,169 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 2217 selfloop transitions, 294 changer transitions 0/2517 dead transitions. [2023-11-23 15:25:12,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 2517 transitions, 27626 flow [2023-11-23 15:25:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 15:25:12,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-23 15:25:12,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 354 transitions. [2023-11-23 15:25:12,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2023-11-23 15:25:12,171 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 354 transitions. [2023-11-23 15:25:12,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 354 transitions. [2023-11-23 15:25:12,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:25:12,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 354 transitions. [2023-11-23 15:25:12,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 15.391304347826088) internal successors, (354), 23 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:25:12,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 24.0) internal successors, (576), 24 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:25:12,174 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 24.0) internal successors, (576), 24 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:25:12,174 INFO L175 Difference]: Start difference. First operand has 622 places, 1067 transitions, 14026 flow. Second operand 23 states and 354 transitions. [2023-11-23 15:25:12,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 2517 transitions, 27626 flow [2023-11-23 15:25:31,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 2517 transitions, 27624 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-23 15:25:31,567 INFO L231 Difference]: Finished difference. Result has 642 places, 1053 transitions, 14416 flow [2023-11-23 15:25:31,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13828, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=14416, PETRI_PLACES=642, PETRI_TRANSITIONS=1053} [2023-11-23 15:25:31,570 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 620 predicate places. [2023-11-23 15:25:31,570 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 1053 transitions, 14416 flow [2023-11-23 15:25:31,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.08695652173913) internal successors, (232), 23 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:25:31,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:25:31,570 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:25:31,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-23 15:25:31,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 15:25:31,779 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 15:25:31,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:25:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash -467363700, now seen corresponding path program 10 times [2023-11-23 15:25:31,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:25:31,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908118168] [2023-11-23 15:25:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:25:31,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:25:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:25:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2041 backedges. 975 proven. 96 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2023-11-23 15:25:32,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:25:32,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908118168] [2023-11-23 15:25:32,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908118168] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:25:32,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139946911] [2023-11-23 15:25:32,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 15:25:32,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:25:32,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:25:32,460 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:25:32,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 15:25:32,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 15:25:32,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:25:32,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 15:25:32,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:25:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2041 backedges. 1071 proven. 0 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2023-11-23 15:25:32,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:25:32,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139946911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:25:32,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:25:32,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2023-11-23 15:25:32,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243744945] [2023-11-23 15:25:32,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:25:32,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 15:25:32,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:25:32,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 15:25:32,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2023-11-23 15:25:32,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-23 15:25:32,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 1053 transitions, 14416 flow. Second operand has 23 states, 23 states have (on average 10.08695652173913) internal successors, (232), 23 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:25:32,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:25:32,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-23 15:25:32,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:25:39,537 INFO L124 PetriNetUnfolderBase]: 5390/13333 cut-off events. [2023-11-23 15:25:39,537 INFO L125 PetriNetUnfolderBase]: For 1875541/1875541 co-relation queries the response was YES. [2023-11-23 15:25:39,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88432 conditions, 13333 events. 5390/13333 cut-off events. For 1875541/1875541 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 91596 event pairs, 145 based on Foata normal form. 93/13397 useless extension candidates. Maximal degree in co-relation 87142. Up to 2287 conditions per place. [2023-11-23 15:25:39,698 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 0 selfloop transitions, 0 changer transitions 2131/2131 dead transitions. [2023-11-23 15:25:39,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 2131 transitions, 32089 flow [2023-11-23 15:25:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 15:25:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-23 15:25:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 353 transitions. [2023-11-23 15:25:39,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394927536231884 [2023-11-23 15:25:39,701 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 353 transitions. [2023-11-23 15:25:39,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 353 transitions. [2023-11-23 15:25:39,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:25:39,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 353 transitions. [2023-11-23 15:25:39,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 15.347826086956522) internal successors, (353), 23 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:25:39,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 24.0) internal successors, (576), 24 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:25:39,703 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 24.0) internal successors, (576), 24 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:25:39,703 INFO L175 Difference]: Start difference. First operand has 642 places, 1053 transitions, 14416 flow. Second operand 23 states and 353 transitions. [2023-11-23 15:25:39,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 2131 transitions, 32089 flow [2023-11-23 15:25:45,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 637 places, 2131 transitions, 31121 flow, removed 0 selfloop flow, removed 24 redundant places. [2023-11-23 15:25:45,206 INFO L231 Difference]: Finished difference. Result has 637 places, 0 transitions, 0 flow [2023-11-23 15:25:45,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13737, PETRI_DIFFERENCE_MINUEND_PLACES=615, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1045, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=0, PETRI_PLACES=637, PETRI_TRANSITIONS=0} [2023-11-23 15:25:45,207 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 615 predicate places. [2023-11-23 15:25:45,207 INFO L495 AbstractCegarLoop]: Abstraction has has 637 places, 0 transitions, 0 flow [2023-11-23 15:25:45,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.08695652173913) internal successors, (232), 23 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:25:45,210 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-11-23 15:25:45,211 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-11-23 15:25:45,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-23 15:25:45,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:25:45,430 INFO L445 BasicCegarLoop]: Path program histogram: [10, 1, 1] [2023-11-23 15:25:45,433 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-23 15:25:45,433 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 15:25:45,441 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:25:45 BasicIcfg [2023-11-23 15:25:45,442 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 15:25:45,442 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 15:25:45,442 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 15:25:45,443 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 15:25:45,443 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:22:49" (3/4) ... [2023-11-23 15:25:45,445 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-23 15:25:45,448 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread_function_mutex [2023-11-23 15:25:45,455 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 44 nodes and edges [2023-11-23 15:25:45,455 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2023-11-23 15:25:45,456 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2023-11-23 15:25:45,456 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-23 15:25:45,546 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-11-23 15:25:45,547 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2023-11-23 15:25:45,547 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 15:25:45,547 INFO L158 Benchmark]: Toolchain (without parser) took 177758.44ms. Allocated memory was 155.2MB in the beginning and 9.8GB in the end (delta: 9.6GB). Free memory was 97.4MB in the beginning and 6.3GB in the end (delta: -6.2GB). Peak memory consumption was 3.4GB. Max. memory is 16.1GB. [2023-11-23 15:25:45,548 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 155.2MB. Free memory is still 120.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 15:25:45,548 INFO L158 Benchmark]: CACSL2BoogieTranslator took 580.13ms. Allocated memory is still 155.2MB. Free memory was 97.0MB in the beginning and 58.8MB in the end (delta: 38.2MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2023-11-23 15:25:45,548 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.10ms. Allocated memory is still 155.2MB. Free memory was 58.8MB in the beginning and 56.3MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 15:25:45,548 INFO L158 Benchmark]: Boogie Preprocessor took 72.81ms. Allocated memory is still 155.2MB. Free memory was 56.3MB in the beginning and 54.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 15:25:45,549 INFO L158 Benchmark]: RCFGBuilder took 585.57ms. Allocated memory is still 155.2MB. Free memory was 54.2MB in the beginning and 110.8MB in the end (delta: -56.6MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. [2023-11-23 15:25:45,549 INFO L158 Benchmark]: TraceAbstraction took 176355.39ms. Allocated memory was 155.2MB in the beginning and 9.8GB in the end (delta: 9.6GB). Free memory was 110.1MB in the beginning and 6.3GB in the end (delta: -6.2GB). Peak memory consumption was 3.6GB. Max. memory is 16.1GB. [2023-11-23 15:25:45,549 INFO L158 Benchmark]: Witness Printer took 104.65ms. Allocated memory is still 9.8GB. Free memory was 6.3GB in the beginning and 6.3GB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-23 15:25:45,551 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 155.2MB. Free memory is still 120.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 580.13ms. Allocated memory is still 155.2MB. Free memory was 97.0MB in the beginning and 58.8MB in the end (delta: 38.2MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.10ms. Allocated memory is still 155.2MB. Free memory was 58.8MB in the beginning and 56.3MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 72.81ms. Allocated memory is still 155.2MB. Free memory was 56.3MB in the beginning and 54.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 585.57ms. Allocated memory is still 155.2MB. Free memory was 54.2MB in the beginning and 110.8MB in the end (delta: -56.6MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. * TraceAbstraction took 176355.39ms. Allocated memory was 155.2MB in the beginning and 9.8GB in the end (delta: 9.6GB). Free memory was 110.1MB in the beginning and 6.3GB in the end (delta: -6.2GB). Peak memory consumption was 3.6GB. Max. memory is 16.1GB. * Witness Printer took 104.65ms. Allocated memory is still 9.8GB. Free memory was 6.3GB in the beginning and 6.3GB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 30 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 176.3s, OverallIterations: 12, TraceHistogramMax: 21, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 162.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7069 SdHoareTripleChecker+Valid, 8.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7053 mSDsluCounter, 926 SdHoareTripleChecker+Invalid, 6.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 923 mSDsCounter, 55 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 22750 IncrementalHoareTripleChecker+Invalid, 22805 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 55 mSolverCounterUnsat, 3 mSDtfsCounter, 22750 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2537 GetRequests, 2033 SyntacticMatches, 11 SemanticMatches, 493 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35844 ImplicationChecksByTransitivity, 12.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14490occurred in iteration=9, InterpolantAutomatonStates: 509, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 8.3s InterpolantComputationTime, 2295 NumberOfCodeBlocks, 2280 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 2962 ConstructedInterpolants, 0 QuantifiedInterpolants, 7715 SizeOfPredicates, 22 NumberOfNonLiveVariables, 4916 ConjunctsInSsa, 215 ConjunctsInUnsatCore, 28 InterpolantComputations, 5 PerfectInterpolantSequences, 12670/21022 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-23 15:25:45,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE