./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/02_inc_cas.i --full-output --preprocessor.use.memory.slicer false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 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-ext/02_inc_cas.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 ede09850ec25b369afc0cd16258beff942f9fc7c5304532be31fd5925a934e14 --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 23:37:36,700 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 23:37:36,769 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 23:37:36,773 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 23:37:36,774 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 23:37:36,799 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 23:37:36,800 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 23:37:36,800 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 23:37:36,801 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 23:37:36,804 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 23:37:36,804 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 23:37:36,805 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 23:37:36,805 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 23:37:36,806 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 23:37:36,807 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 23:37:36,807 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 23:37:36,807 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 23:37:36,807 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 23:37:36,807 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 23:37:36,808 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 23:37:36,808 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 23:37:36,808 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 23:37:36,808 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 23:37:36,809 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 23:37:36,809 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 23:37:36,809 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 23:37:36,809 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 23:37:36,810 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 23:37:36,810 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 23:37:36,810 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 23:37:36,811 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 23:37:36,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 23:37:36,811 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 23:37:36,811 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 23:37:36,812 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 23:37:36,812 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 23:37:36,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 23:37:36,812 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 23:37:36,812 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 23:37:36,813 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 23:37:36,813 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 23:37:36,813 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 23:37:36,813 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ede09850ec25b369afc0cd16258beff942f9fc7c5304532be31fd5925a934e14 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-22 23:37:37,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 23:37:37,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 23:37:37,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 23:37:37,043 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 23:37:37,043 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 23:37:37,044 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/02_inc_cas.i [2023-11-22 23:37:38,108 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 23:37:38,363 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 23:37:38,363 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/02_inc_cas.i [2023-11-22 23:37:38,375 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52bdb3d59/9c5bb682e8c84220b951fe7c6b77e6f6/FLAG1ad52b85c [2023-11-22 23:37:38,388 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52bdb3d59/9c5bb682e8c84220b951fe7c6b77e6f6 [2023-11-22 23:37:38,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 23:37:38,391 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 23:37:38,394 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 23:37:38,394 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 23:37:38,398 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 23:37:38,399 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:37:38" (1/1) ... [2023-11-22 23:37:38,401 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f6e7020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:37:38, skipping insertion in model container [2023-11-22 23:37:38,401 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:37:38" (1/1) ... [2023-11-22 23:37:38,440 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 23:37:38,591 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-22 23:37:38,716 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-ext/02_inc_cas.i[30873,30886] [2023-11-22 23:37:38,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 23:37:38,732 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 23:37:38,745 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-22 23:37:38,774 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-ext/02_inc_cas.i[30873,30886] [2023-11-22 23:37:38,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 23:37:38,854 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 23:37:38,856 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 23:37:38,856 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 23:37:38,862 INFO L206 MainTranslator]: Completed translation [2023-11-22 23:37:38,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:37:38 WrapperNode [2023-11-22 23:37:38,862 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 23:37:38,863 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 23:37:38,864 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 23:37:38,864 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 23:37:38,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:37:38" (1/1) ... [2023-11-22 23:37:38,899 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:37:38" (1/1) ... [2023-11-22 23:37:38,920 INFO L138 Inliner]: procedures = 171, calls = 29, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2023-11-22 23:37:38,920 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 23:37:38,921 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 23:37:38,921 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 23:37:38,921 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 23:37:38,927 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:37:38" (1/1) ... [2023-11-22 23:37:38,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:37:38" (1/1) ... [2023-11-22 23:37:38,933 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:37:38" (1/1) ... [2023-11-22 23:37:38,933 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:37:38" (1/1) ... [2023-11-22 23:37:38,947 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:37:38" (1/1) ... [2023-11-22 23:37:38,950 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:37:38" (1/1) ... [2023-11-22 23:37:38,955 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:37:38" (1/1) ... [2023-11-22 23:37:38,956 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:37:38" (1/1) ... [2023-11-22 23:37:38,958 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 23:37:38,962 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 23:37:38,962 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 23:37:38,962 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 23:37:38,963 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:37:38" (1/1) ... [2023-11-22 23:37:38,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 23:37:38,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:37:38,990 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) [2023-11-22 23:37:39,010 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 [2023-11-22 23:37:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-22 23:37:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-22 23:37:39,035 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-22 23:37:39,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-22 23:37:39,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-22 23:37:39,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 23:37:39,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 23:37:39,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 23:37:39,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-22 23:37:39,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-22 23:37:39,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 23:37:39,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 23:37:39,039 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-22 23:37:39,135 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 23:37:39,137 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 23:37:39,240 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 23:37:39,355 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 23:37:39,355 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-22 23:37:39,356 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:37:39 BoogieIcfgContainer [2023-11-22 23:37:39,356 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 23:37:39,358 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 23:37:39,359 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 23:37:39,361 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 23:37:39,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 11:37:38" (1/3) ... [2023-11-22 23:37:39,362 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad487f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 11:37:39, skipping insertion in model container [2023-11-22 23:37:39,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:37:38" (2/3) ... [2023-11-22 23:37:39,364 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad487f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 11:37:39, skipping insertion in model container [2023-11-22 23:37:39,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:37:39" (3/3) ... [2023-11-22 23:37:39,366 INFO L112 eAbstractionObserver]: Analyzing ICFG 02_inc_cas.i [2023-11-22 23:37:39,372 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-22 23:37:39,380 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 23:37:39,380 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 23:37:39,380 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-22 23:37:39,408 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-22 23:37:39,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 19 places, 19 transitions, 42 flow [2023-11-22 23:37:39,448 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-11-22 23:37:39,448 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-22 23:37:39,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 21 events. 3/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 42 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 16. Up to 2 conditions per place. [2023-11-22 23:37:39,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 19 places, 19 transitions, 42 flow [2023-11-22 23:37:39,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 19 transitions, 42 flow [2023-11-22 23:37:39,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 23:37:39,467 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;@7cfffb3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 23:37:39,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-22 23:37:39,475 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-22 23:37:39,475 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-11-22 23:37:39,475 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-22 23:37:39,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 23:37:39,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-22 23:37:39,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:37:39,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:37:39,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1940293997, now seen corresponding path program 1 times [2023-11-22 23:37:39,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:37:39,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561186714] [2023-11-22 23:37:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:37:39,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:37:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:37:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 23:37:39,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:37:39,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561186714] [2023-11-22 23:37:39,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561186714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:37:39,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:37:39,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 23:37:39,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319494031] [2023-11-22 23:37:39,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:37:39,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 23:37:39,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:37:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 23:37:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 23:37:39,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-22 23:37:39,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 19 transitions, 42 flow. Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:39,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 23:37:39,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-22 23:37:39,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 23:37:39,748 INFO L124 PetriNetUnfolderBase]: 22/59 cut-off events. [2023-11-22 23:37:39,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-22 23:37:39,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 59 events. 22/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 132 event pairs, 16 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 102. Up to 52 conditions per place. [2023-11-22 23:37:39,750 INFO L140 encePairwiseOnDemand]: 17/19 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-11-22 23:37:39,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 17 transitions, 66 flow [2023-11-22 23:37:39,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 23:37:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-22 23:37:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 22 transitions. [2023-11-22 23:37:39,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2023-11-22 23:37:39,760 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 22 transitions. [2023-11-22 23:37:39,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 22 transitions. [2023-11-22 23:37:39,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 23:37:39,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 22 transitions. [2023-11-22 23:37:39,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:39,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:39,765 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:39,766 INFO L175 Difference]: Start difference. First operand has 19 places, 19 transitions, 42 flow. Second operand 2 states and 22 transitions. [2023-11-22 23:37:39,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 17 transitions, 66 flow [2023-11-22 23:37:39,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 17 transitions, 66 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-22 23:37:39,769 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 38 flow [2023-11-22 23:37:39,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=38, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-11-22 23:37:39,773 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 0 predicate places. [2023-11-22 23:37:39,773 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 38 flow [2023-11-22 23:37:39,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:39,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 23:37:39,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-22 23:37:39,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 23:37:39,774 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:37:39,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:37:39,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1940283994, now seen corresponding path program 1 times [2023-11-22 23:37:39,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:37:39,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680098610] [2023-11-22 23:37:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:37:39,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:37:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 23:37:39,792 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-22 23:37:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 23:37:39,814 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-22 23:37:39,814 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-22 23:37:39,815 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-22 23:37:39,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-22 23:37:39,817 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-22 23:37:39,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 23:37:39,817 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-22 23:37:39,819 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-22 23:37:39,819 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-22 23:37:39,836 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-22 23:37:39,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 33 transitions, 76 flow [2023-11-22 23:37:39,846 INFO L124 PetriNetUnfolderBase]: 6/38 cut-off events. [2023-11-22 23:37:39,848 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-22 23:37:39,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 38 events. 6/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 86 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2023-11-22 23:37:39,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 33 transitions, 76 flow [2023-11-22 23:37:39,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 33 transitions, 76 flow [2023-11-22 23:37:39,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 23:37:39,855 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;@7cfffb3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 23:37:39,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-22 23:37:39,862 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-22 23:37:39,863 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2023-11-22 23:37:39,864 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-22 23:37:39,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 23:37:39,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-22 23:37:39,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-22 23:37:39,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:37:39,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1378019059, now seen corresponding path program 1 times [2023-11-22 23:37:39,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:37:39,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602849061] [2023-11-22 23:37:39,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:37:39,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:37:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:37:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 23:37:39,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:37:39,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602849061] [2023-11-22 23:37:39,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602849061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:37:39,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:37:39,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 23:37:39,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267423073] [2023-11-22 23:37:39,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:37:39,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 23:37:39,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:37:39,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 23:37:39,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 23:37:39,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2023-11-22 23:37:39,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 76 flow. Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:39,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 23:37:39,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2023-11-22 23:37:39,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 23:37:40,069 INFO L124 PetriNetUnfolderBase]: 490/822 cut-off events. [2023-11-22 23:37:40,070 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-22 23:37:40,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1617 conditions, 822 events. 490/822 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3296 event pairs, 376 based on Foata normal form. 0/642 useless extension candidates. Maximal degree in co-relation 1143. Up to 763 conditions per place. [2023-11-22 23:37:40,078 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 25 selfloop transitions, 0 changer transitions 0/30 dead transitions. [2023-11-22 23:37:40,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 120 flow [2023-11-22 23:37:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 23:37:40,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-22 23:37:40,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 38 transitions. [2023-11-22 23:37:40,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2023-11-22 23:37:40,081 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 38 transitions. [2023-11-22 23:37:40,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 38 transitions. [2023-11-22 23:37:40,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 23:37:40,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 38 transitions. [2023-11-22 23:37:40,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:40,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:40,084 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:40,085 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 76 flow. Second operand 2 states and 38 transitions. [2023-11-22 23:37:40,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 120 flow [2023-11-22 23:37:40,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-22 23:37:40,088 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 70 flow [2023-11-22 23:37:40,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-11-22 23:37:40,089 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-11-22 23:37:40,089 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 70 flow [2023-11-22 23:37:40,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:40,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 23:37:40,090 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-22 23:37:40,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 23:37:40,090 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-22 23:37:40,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:37:40,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1950289510, now seen corresponding path program 1 times [2023-11-22 23:37:40,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:37:40,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646663545] [2023-11-22 23:37:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:37:40,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:37:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 23:37:40,127 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-22 23:37:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 23:37:40,150 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-22 23:37:40,153 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-22 23:37:40,154 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-22 23:37:40,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-22 23:37:40,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-22 23:37:40,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-22 23:37:40,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 23:37:40,155 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-22 23:37:40,155 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-22 23:37:40,156 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-22 23:37:40,189 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-22 23:37:40,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 47 transitions, 112 flow [2023-11-22 23:37:40,207 INFO L124 PetriNetUnfolderBase]: 9/55 cut-off events. [2023-11-22 23:37:40,214 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-22 23:37:40,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 55 events. 9/55 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 144 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 4 conditions per place. [2023-11-22 23:37:40,215 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 47 transitions, 112 flow [2023-11-22 23:37:40,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 47 transitions, 112 flow [2023-11-22 23:37:40,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 23:37:40,218 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;@7cfffb3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 23:37:40,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-22 23:37:40,220 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-22 23:37:40,220 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2023-11-22 23:37:40,221 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-22 23:37:40,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 23:37:40,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-22 23:37:40,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-22 23:37:40,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:37:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash 12790656, now seen corresponding path program 1 times [2023-11-22 23:37:40,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:37:40,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045678353] [2023-11-22 23:37:40,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:37:40,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:37:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:37:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 23:37:40,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:37:40,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045678353] [2023-11-22 23:37:40,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045678353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:37:40,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:37:40,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 23:37:40,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318417812] [2023-11-22 23:37:40,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:37:40,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 23:37:40,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:37:40,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 23:37:40,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 23:37:40,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2023-11-22 23:37:40,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 112 flow. Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:40,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 23:37:40,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2023-11-22 23:37:40,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 23:37:40,998 INFO L124 PetriNetUnfolderBase]: 7132/10110 cut-off events. [2023-11-22 23:37:40,999 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2023-11-22 23:37:41,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20059 conditions, 10110 events. 7132/10110 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 50490 event pairs, 5560 based on Foata normal form. 0/7656 useless extension candidates. Maximal degree in co-relation 4545. Up to 9592 conditions per place. [2023-11-22 23:37:41,059 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 36 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-11-22 23:37:41,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 176 flow [2023-11-22 23:37:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 23:37:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-22 23:37:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 54 transitions. [2023-11-22 23:37:41,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2023-11-22 23:37:41,061 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 54 transitions. [2023-11-22 23:37:41,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 54 transitions. [2023-11-22 23:37:41,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 23:37:41,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 54 transitions. [2023-11-22 23:37:41,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:41,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:41,063 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:41,063 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 112 flow. Second operand 2 states and 54 transitions. [2023-11-22 23:37:41,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 176 flow [2023-11-22 23:37:41,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 174 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-22 23:37:41,065 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 102 flow [2023-11-22 23:37:41,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=102, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-11-22 23:37:41,066 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2023-11-22 23:37:41,066 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 102 flow [2023-11-22 23:37:41,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:41,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 23:37:41,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:37:41,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-22 23:37:41,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-22 23:37:41,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:37:41,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1318638203, now seen corresponding path program 1 times [2023-11-22 23:37:41,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:37:41,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037211783] [2023-11-22 23:37:41,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:37:41,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:37:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:37:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 23:37:41,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:37:41,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037211783] [2023-11-22 23:37:41,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037211783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:37:41,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:37:41,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 23:37:41,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110470302] [2023-11-22 23:37:41,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:37:41,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-22 23:37:41,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:37:41,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-22 23:37:41,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-22 23:37:41,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 47 [2023-11-22 23:37:41,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 102 flow. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:41,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 23:37:41,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 47 [2023-11-22 23:37:41,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 23:37:43,826 INFO L124 PetriNetUnfolderBase]: 14098/20676 cut-off events. [2023-11-22 23:37:43,826 INFO L125 PetriNetUnfolderBase]: For 734/734 co-relation queries the response was YES. [2023-11-22 23:37:43,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40379 conditions, 20676 events. 14098/20676 cut-off events. For 734/734 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 126721 event pairs, 1116 based on Foata normal form. 0/16333 useless extension candidates. Maximal degree in co-relation 40373. Up to 5853 conditions per place. [2023-11-22 23:37:43,933 INFO L140 encePairwiseOnDemand]: 29/47 looper letters, 303 selfloop transitions, 74 changer transitions 0/383 dead transitions. [2023-11-22 23:37:43,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 383 transitions, 1631 flow [2023-11-22 23:37:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 23:37:43,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-22 23:37:43,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 469 transitions. [2023-11-22 23:37:43,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6652482269503546 [2023-11-22 23:37:43,937 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 469 transitions. [2023-11-22 23:37:43,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 469 transitions. [2023-11-22 23:37:43,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 23:37:43,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 469 transitions. [2023-11-22 23:37:43,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 31.266666666666666) internal successors, (469), 15 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:43,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 47.0) internal successors, (752), 16 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:43,942 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 47.0) internal successors, (752), 16 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:43,942 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 102 flow. Second operand 15 states and 469 transitions. [2023-11-22 23:37:43,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 383 transitions, 1631 flow [2023-11-22 23:37:43,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 383 transitions, 1631 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-22 23:37:43,947 INFO L231 Difference]: Finished difference. Result has 69 places, 133 transitions, 659 flow [2023-11-22 23:37:43,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=659, PETRI_PLACES=69, PETRI_TRANSITIONS=133} [2023-11-22 23:37:43,948 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2023-11-22 23:37:43,949 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 133 transitions, 659 flow [2023-11-22 23:37:43,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:43,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 23:37:43,949 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-22 23:37:43,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-22 23:37:43,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-22 23:37:43,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:37:43,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1319909625, now seen corresponding path program 1 times [2023-11-22 23:37:43,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:37:43,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760838698] [2023-11-22 23:37:43,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:37:43,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:37:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 23:37:43,965 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-22 23:37:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 23:37:43,983 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-22 23:37:43,985 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-22 23:37:43,985 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-22 23:37:43,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-22 23:37:43,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-22 23:37:43,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-22 23:37:43,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-22 23:37:43,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-22 23:37:43,986 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-22 23:37:43,987 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-22 23:37:43,987 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-22 23:37:44,018 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-22 23:37:44,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 61 transitions, 150 flow [2023-11-22 23:37:44,027 INFO L124 PetriNetUnfolderBase]: 12/72 cut-off events. [2023-11-22 23:37:44,027 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-22 23:37:44,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 72 events. 12/72 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 196 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 67. Up to 5 conditions per place. [2023-11-22 23:37:44,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 61 transitions, 150 flow [2023-11-22 23:37:44,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 61 transitions, 150 flow [2023-11-22 23:37:44,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 23:37:44,036 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;@7cfffb3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 23:37:44,036 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-22 23:37:44,038 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-22 23:37:44,038 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2023-11-22 23:37:44,038 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-22 23:37:44,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 23:37:44,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-22 23:37:44,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-22 23:37:44,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:37:44,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1817781664, now seen corresponding path program 1 times [2023-11-22 23:37:44,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:37:44,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646387205] [2023-11-22 23:37:44,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:37:44,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:37:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:37:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 23:37:44,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:37:44,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646387205] [2023-11-22 23:37:44,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646387205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:37:44,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:37:44,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 23:37:44,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590119553] [2023-11-22 23:37:44,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:37:44,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 23:37:44,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:37:44,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 23:37:44,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 23:37:44,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 61 [2023-11-22 23:37:44,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:44,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 23:37:44,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 61 [2023-11-22 23:37:44,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 23:37:50,477 INFO L124 PetriNetUnfolderBase]: 88780/115578 cut-off events. [2023-11-22 23:37:50,478 INFO L125 PetriNetUnfolderBase]: For 8840/8840 co-relation queries the response was YES. [2023-11-22 23:37:50,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230504 conditions, 115578 events. 88780/115578 cut-off events. For 8840/8840 co-relation queries the response was YES. Maximal size of possible extension queue 2628. Compared 648142 event pairs, 69712 based on Foata normal form. 0/86097 useless extension candidates. Maximal degree in co-relation 20145. Up to 110923 conditions per place. [2023-11-22 23:37:51,178 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 47 selfloop transitions, 0 changer transitions 0/56 dead transitions. [2023-11-22 23:37:51,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 56 transitions, 234 flow [2023-11-22 23:37:51,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 23:37:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-22 23:37:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 70 transitions. [2023-11-22 23:37:51,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5737704918032787 [2023-11-22 23:37:51,181 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 70 transitions. [2023-11-22 23:37:51,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 70 transitions. [2023-11-22 23:37:51,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 23:37:51,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 70 transitions. [2023-11-22 23:37:51,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:51,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:51,184 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:51,184 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 150 flow. Second operand 2 states and 70 transitions. [2023-11-22 23:37:51,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 56 transitions, 234 flow [2023-11-22 23:37:51,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 56 transitions, 228 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-22 23:37:51,191 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 134 flow [2023-11-22 23:37:51,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2023-11-22 23:37:51,193 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 0 predicate places. [2023-11-22 23:37:51,193 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 134 flow [2023-11-22 23:37:51,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:37:51,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 23:37:51,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:37:51,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-22 23:37:51,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-22 23:37:51,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:37:51,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1400406245, now seen corresponding path program 1 times [2023-11-22 23:37:51,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:37:51,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594208181] [2023-11-22 23:37:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:37:51,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:37:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:37:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 23:37:51,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:37:51,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594208181] [2023-11-22 23:37:51,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594208181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:37:51,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:37:51,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-22 23:37:51,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798980848] [2023-11-22 23:37:51,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:37:51,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-22 23:37:51,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:37:51,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-22 23:37:51,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-22 23:37:51,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 61 [2023-11-22 23:37:51,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 134 flow. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 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) [2023-11-22 23:37:51,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 23:37:51,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 61 [2023-11-22 23:37:51,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 23:38:08,869 INFO L124 PetriNetUnfolderBase]: 246217/324466 cut-off events. [2023-11-22 23:38:08,869 INFO L125 PetriNetUnfolderBase]: For 11237/11237 co-relation queries the response was YES. [2023-11-22 23:38:09,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 639832 conditions, 324466 events. 246217/324466 cut-off events. For 11237/11237 co-relation queries the response was YES. Maximal size of possible extension queue 7510. Compared 2130934 event pairs, 38903 based on Foata normal form. 0/250559 useless extension candidates. Maximal degree in co-relation 639825. Up to 133039 conditions per place. [2023-11-22 23:38:10,768 INFO L140 encePairwiseOnDemand]: 43/61 looper letters, 348 selfloop transitions, 70 changer transitions 0/426 dead transitions. [2023-11-22 23:38:10,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 426 transitions, 1875 flow [2023-11-22 23:38:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 23:38:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-22 23:38:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 542 transitions. [2023-11-22 23:38:10,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923497267759563 [2023-11-22 23:38:10,771 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 542 transitions. [2023-11-22 23:38:10,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 542 transitions. [2023-11-22 23:38:10,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 23:38:10,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 542 transitions. [2023-11-22 23:38:10,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 36.13333333333333) internal successors, (542), 15 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:38:10,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 61.0) internal successors, (976), 16 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:38:10,774 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 61.0) internal successors, (976), 16 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:38:10,774 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 134 flow. Second operand 15 states and 542 transitions. [2023-11-22 23:38:10,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 426 transitions, 1875 flow [2023-11-22 23:38:10,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 426 transitions, 1875 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-22 23:38:10,799 INFO L231 Difference]: Finished difference. Result has 84 places, 131 transitions, 599 flow [2023-11-22 23:38:10,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=599, PETRI_PLACES=84, PETRI_TRANSITIONS=131} [2023-11-22 23:38:10,800 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 26 predicate places. [2023-11-22 23:38:10,800 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 131 transitions, 599 flow [2023-11-22 23:38:10,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 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) [2023-11-22 23:38:10,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 23:38:10,800 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:38:10,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-22 23:38:10,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-22 23:38:10,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:38:10,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1532269801, now seen corresponding path program 1 times [2023-11-22 23:38:10,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:38:10,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52289716] [2023-11-22 23:38:10,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:38:10,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:38:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:38:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 23:38:11,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:38:11,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52289716] [2023-11-22 23:38:11,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52289716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 23:38:11,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079854870] [2023-11-22 23:38:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:38:11,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:38:11,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:38:11,117 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) [2023-11-22 23:38:11,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 23:38:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:38:11,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-22 23:38:11,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:38:11,270 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-22 23:38:11,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-22 23:38:11,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-22 23:38:11,320 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 23:38:11,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-22 23:38:11,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-22 23:38:11,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-22 23:38:11,509 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-22 23:38:11,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-22 23:38:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 23:38:11,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 23:38:11,581 WARN L854 $PredicateComparison]: unable to prove that (or (= (mod |c_thr1Thread1of4ForFork0_#t~mem5#1| 4294967296) 0) (forall ((v_ArrVal_108 (Array Int Int))) (< (mod |c_thr1Thread1of4ForFork0_~v~0#1| 4294967296) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_108) |c_~#value~0.base|) |c_~#value~0.offset|) 4294967296)))) is different from false [2023-11-22 23:38:11,589 WARN L854 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_108 (Array Int Int))) (< (mod |c_thr1Thread1of4ForFork0_~v~0#1| 4294967296) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_108) |c_~#value~0.base|) |c_~#value~0.offset|) 4294967296))) (= (mod (select (select |c_#memory_int| |c_thr1Thread1of4ForFork0_~#casret~0#1.base|) |c_thr1Thread1of4ForFork0_~#casret~0#1.offset|) 4294967296) 0)) is different from false [2023-11-22 23:38:11,719 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_~#value~0.base|))) (let ((.cse2 (select .cse1 |c_~#value~0.offset|))) (let ((.cse0 (mod .cse2 4294967296))) (or (forall ((v_DerPreprocessor_1 (Array Int Int)) (v_ArrVal_108 (Array Int Int)) (|thr1Thread1of4ForFork0_~#casret~0#1.offset| Int)) (or (< .cse0 (mod (select (select (store (store (store |c_#memory_int| |c_~#value~0.base| (store .cse1 |c_~#value~0.offset| (+ 1 .cse2))) |c_thr1Thread1of4ForFork0_~#casret~0#1.base| v_DerPreprocessor_1) |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_108) |c_~#value~0.base|) |c_~#value~0.offset|) 4294967296)) (= (mod (select v_DerPreprocessor_1 |thr1Thread1of4ForFork0_~#casret~0#1.offset|) 4294967296) 0))) (= .cse0 4294967295))))) is different from false [2023-11-22 23:38:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 23:38:11,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079854870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 23:38:11,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 23:38:11,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 24 [2023-11-22 23:38:11,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265978823] [2023-11-22 23:38:11,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 23:38:11,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-22 23:38:11,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:38:11,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-22 23:38:11,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=396, Unknown=11, NotChecked=132, Total=650 [2023-11-22 23:38:11,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 61 [2023-11-22 23:38:11,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 131 transitions, 599 flow. Second operand has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 26 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:38:11,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 23:38:11,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 61 [2023-11-22 23:38:11,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 23:38:14,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 23:38:16,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 23:38:18,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]