./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f 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/31_simple_loop5_vs.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 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:08:59,743 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:08:59,806 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:08:59,811 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:08:59,812 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:08:59,836 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:08:59,837 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:08:59,837 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:08:59,838 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:08:59,840 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:08:59,841 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:08:59,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:08:59,842 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:08:59,843 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:08:59,843 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:08:59,843 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:08:59,843 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:08:59,843 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:08:59,844 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:08:59,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:08:59,844 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:08:59,844 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:08:59,845 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:08:59,845 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:08:59,845 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:08:59,845 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:08:59,845 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:08:59,846 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:08:59,846 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:08:59,846 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:08:59,847 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:08:59,847 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:08:59,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:08:59,847 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:08:59,848 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:08:59,848 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:08:59,848 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:08:59,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:08:59,848 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:08:59,849 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:08:59,849 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:08:59,849 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:08:59,849 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:08:59,849 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f [2024-01-27 15:09:00,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:09:00,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:09:00,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:09:00,094 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:09:00,094 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:09:00,095 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2024-01-27 15:09:01,176 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:09:01,339 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:09:01,339 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2024-01-27 15:09:01,351 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6da15b013/701d6326b705459c99a179d508324e56/FLAG35119ebef [2024-01-27 15:09:01,363 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6da15b013/701d6326b705459c99a179d508324e56 [2024-01-27 15:09:01,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:09:01,366 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:09:01,367 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:09:01,367 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:09:01,371 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:09:01,371 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:09:01" (1/1) ... [2024-01-27 15:09:01,372 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a5fe5a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:01, skipping insertion in model container [2024-01-27 15:09:01,372 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:09:01" (1/1) ... [2024-01-27 15:09:01,398 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:09:01,669 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2024-01-27 15:09:01,681 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:09:01,692 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:09:01,730 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2024-01-27 15:09:01,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:09:01,767 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:09:01,767 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:01 WrapperNode [2024-01-27 15:09:01,768 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:09:01,769 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:09:01,770 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:09:01,770 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:09:01,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:01" (1/1) ... [2024-01-27 15:09:01,800 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:01" (1/1) ... [2024-01-27 15:09:01,823 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 82 [2024-01-27 15:09:01,823 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:09:01,824 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:09:01,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:09:01,824 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:09:01,832 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:01" (1/1) ... [2024-01-27 15:09:01,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:01" (1/1) ... [2024-01-27 15:09:01,843 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:01" (1/1) ... [2024-01-27 15:09:01,864 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-01-27 15:09:01,867 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:01" (1/1) ... [2024-01-27 15:09:01,867 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:01" (1/1) ... [2024-01-27 15:09:01,873 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:01" (1/1) ... [2024-01-27 15:09:01,876 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:01" (1/1) ... [2024-01-27 15:09:01,880 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:01" (1/1) ... [2024-01-27 15:09:01,881 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:01" (1/1) ... [2024-01-27 15:09:01,885 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:09:01,888 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:09:01,888 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:09:01,889 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:09:01,889 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:01" (1/1) ... [2024-01-27 15:09:01,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:09:01,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:09:01,915 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:09:01,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:09:01,993 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-01-27 15:09:01,993 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-01-27 15:09:01,993 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-27 15:09:01,993 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-27 15:09:01,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:09:01,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:09:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:09:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:09:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:09:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:09:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:09:01,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:09:01,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:09:01,997 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:09:02,096 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:09:02,098 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:09:02,212 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:09:02,212 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:09:02,295 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:09:02,296 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:09:02,296 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:09:02 BoogieIcfgContainer [2024-01-27 15:09:02,296 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:09:02,298 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:09:02,298 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:09:02,300 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:09:02,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:09:01" (1/3) ... [2024-01-27 15:09:02,301 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0b11b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:09:02, skipping insertion in model container [2024-01-27 15:09:02,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:09:01" (2/3) ... [2024-01-27 15:09:02,301 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0b11b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:09:02, skipping insertion in model container [2024-01-27 15:09:02,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:09:02" (3/3) ... [2024-01-27 15:09:02,302 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2024-01-27 15:09:02,308 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:09:02,316 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:09:02,316 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:09:02,316 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:09:02,353 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:09:02,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 24 transitions, 56 flow [2024-01-27 15:09:02,398 INFO L124 PetriNetUnfolderBase]: 3/25 cut-off events. [2024-01-27 15:09:02,405 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:09:02,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 25 events. 3/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 51 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-01-27 15:09:02,408 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 24 transitions, 56 flow [2024-01-27 15:09:02,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 23 transitions, 53 flow [2024-01-27 15:09:02,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:09:02,442 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;@62a3fb5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:09:02,442 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:09:02,448 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:09:02,448 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-01-27 15:09:02,448 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:09:02,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:02,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:02,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:09:02,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:02,454 INFO L85 PathProgramCache]: Analyzing trace with hash 32344680, now seen corresponding path program 1 times [2024-01-27 15:09:02,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:02,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105742634] [2024-01-27 15:09:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:02,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:02,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:02,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105742634] [2024-01-27 15:09:02,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105742634] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:02,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:02,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:09:02,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079233420] [2024-01-27 15:09:02,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:02,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:09:02,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:02,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:09:02,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:09:02,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 24 [2024-01-27 15:09:02,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:02,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:02,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 24 [2024-01-27 15:09:02,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:02,865 INFO L124 PetriNetUnfolderBase]: 99/199 cut-off events. [2024-01-27 15:09:02,866 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:09:02,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 199 events. 99/199 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 750 event pairs, 27 based on Foata normal form. 72/264 useless extension candidates. Maximal degree in co-relation 363. Up to 106 conditions per place. [2024-01-27 15:09:02,873 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 16 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2024-01-27 15:09:02,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 25 transitions, 93 flow [2024-01-27 15:09:02,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:09:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:09:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-01-27 15:09:02,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-01-27 15:09:02,884 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 53 flow. Second operand 3 states and 50 transitions. [2024-01-27 15:09:02,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 25 transitions, 93 flow [2024-01-27 15:09:02,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 25 transitions, 92 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:09:02,889 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 56 flow [2024-01-27 15:09:02,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-01-27 15:09:02,896 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2024-01-27 15:09:02,896 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 56 flow [2024-01-27 15:09:02,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:02,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:02,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:02,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:09:02,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:09:02,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:02,899 INFO L85 PathProgramCache]: Analyzing trace with hash 177235350, now seen corresponding path program 1 times [2024-01-27 15:09:02,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:02,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116486742] [2024-01-27 15:09:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:02,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:02,926 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:09:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:02,951 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:09:02,953 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:09:02,954 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-01-27 15:09:02,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-01-27 15:09:02,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-01-27 15:09:02,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-01-27 15:09:02,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:09:02,956 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-27 15:09:02,959 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:09:02,959 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-27 15:09:02,981 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:09:02,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 41 transitions, 102 flow [2024-01-27 15:09:02,992 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2024-01-27 15:09:02,994 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:09:02,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 35 events. 4/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 42. Up to 3 conditions per place. [2024-01-27 15:09:02,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 41 transitions, 102 flow [2024-01-27 15:09:02,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 30 transitions, 73 flow [2024-01-27 15:09:02,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:09:02,998 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;@62a3fb5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:09:02,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 15:09:03,001 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:09:03,002 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2024-01-27 15:09:03,002 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:09:03,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:03,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:03,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:09:03,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:03,003 INFO L85 PathProgramCache]: Analyzing trace with hash -557996121, now seen corresponding path program 1 times [2024-01-27 15:09:03,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:03,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378464509] [2024-01-27 15:09:03,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:03,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:03,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:03,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378464509] [2024-01-27 15:09:03,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378464509] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:03,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:03,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:09:03,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440088504] [2024-01-27 15:09:03,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:03,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:09:03,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:03,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:09:03,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:09:03,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-01-27 15:09:03,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:03,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:03,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-01-27 15:09:03,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:03,200 INFO L124 PetriNetUnfolderBase]: 693/1119 cut-off events. [2024-01-27 15:09:03,204 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-01-27 15:09:03,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158 conditions, 1119 events. 693/1119 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5467 event pairs, 138 based on Foata normal form. 443/1540 useless extension candidates. Maximal degree in co-relation 2147. Up to 814 conditions per place. [2024-01-27 15:09:03,213 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 22 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2024-01-27 15:09:03,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 136 flow [2024-01-27 15:09:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:09:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:09:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-01-27 15:09:03,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-01-27 15:09:03,217 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 73 flow. Second operand 3 states and 77 transitions. [2024-01-27 15:09:03,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 136 flow [2024-01-27 15:09:03,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:09:03,221 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 81 flow [2024-01-27 15:09:03,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2024-01-27 15:09:03,222 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2024-01-27 15:09:03,222 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 81 flow [2024-01-27 15:09:03,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:03,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:03,222 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:03,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:09:03,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:09:03,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:03,223 INFO L85 PathProgramCache]: Analyzing trace with hash -749585487, now seen corresponding path program 1 times [2024-01-27 15:09:03,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:03,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545186819] [2024-01-27 15:09:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:03,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:03,262 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:09:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:03,273 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:09:03,273 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:09:03,273 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-01-27 15:09:03,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-01-27 15:09:03,274 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2024-01-27 15:09:03,274 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-01-27 15:09:03,274 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-01-27 15:09:03,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:09:03,274 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-27 15:09:03,275 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:09:03,275 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-27 15:09:03,305 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:09:03,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 58 transitions, 152 flow [2024-01-27 15:09:03,319 INFO L124 PetriNetUnfolderBase]: 5/45 cut-off events. [2024-01-27 15:09:03,319 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-27 15:09:03,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 45 events. 5/45 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 92 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2024-01-27 15:09:03,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 58 transitions, 152 flow [2024-01-27 15:09:03,320 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 37 transitions, 95 flow [2024-01-27 15:09:03,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:09:03,326 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;@62a3fb5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:09:03,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-01-27 15:09:03,329 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:09:03,329 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2024-01-27 15:09:03,329 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:09:03,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:03,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:03,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-01-27 15:09:03,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:03,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1565831264, now seen corresponding path program 1 times [2024-01-27 15:09:03,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:03,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83287587] [2024-01-27 15:09:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:03,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:03,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:03,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83287587] [2024-01-27 15:09:03,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83287587] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:03,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:03,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:09:03,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326684588] [2024-01-27 15:09:03,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:03,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:09:03,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:03,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:09:03,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:09:03,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2024-01-27 15:09:03,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:03,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:03,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2024-01-27 15:09:03,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:03,826 INFO L124 PetriNetUnfolderBase]: 3801/5475 cut-off events. [2024-01-27 15:09:03,826 INFO L125 PetriNetUnfolderBase]: For 515/515 co-relation queries the response was YES. [2024-01-27 15:09:03,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10739 conditions, 5475 events. 3801/5475 cut-off events. For 515/515 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29397 event pairs, 723 based on Foata normal form. 2292/7695 useless extension candidates. Maximal degree in co-relation 10727. Up to 4510 conditions per place. [2024-01-27 15:09:03,856 INFO L140 encePairwiseOnDemand]: 47/58 looper letters, 28 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-01-27 15:09:03,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 43 transitions, 183 flow [2024-01-27 15:09:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:09:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:09:03,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-01-27 15:09:03,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977011494252874 [2024-01-27 15:09:03,860 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 95 flow. Second operand 3 states and 104 transitions. [2024-01-27 15:09:03,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 43 transitions, 183 flow [2024-01-27 15:09:03,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 178 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-27 15:09:03,863 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 106 flow [2024-01-27 15:09:03,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-01-27 15:09:03,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2024-01-27 15:09:03,865 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 106 flow [2024-01-27 15:09:03,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:03,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:03,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:03,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:09:03,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-01-27 15:09:03,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:03,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1917220104, now seen corresponding path program 1 times [2024-01-27 15:09:03,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:03,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664085153] [2024-01-27 15:09:03,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:03,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:03,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:03,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664085153] [2024-01-27 15:09:03,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664085153] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:03,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:03,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:09:03,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184661785] [2024-01-27 15:09:03,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:03,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:09:03,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:03,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:09:03,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:09:03,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 58 [2024-01-27 15:09:03,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:03,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:03,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 58 [2024-01-27 15:09:03,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:04,062 INFO L124 PetriNetUnfolderBase]: 459/974 cut-off events. [2024-01-27 15:09:04,062 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-01-27 15:09:04,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2135 conditions, 974 events. 459/974 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5262 event pairs, 87 based on Foata normal form. 691/1622 useless extension candidates. Maximal degree in co-relation 2121. Up to 608 conditions per place. [2024-01-27 15:09:04,068 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 20 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2024-01-27 15:09:04,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 187 flow [2024-01-27 15:09:04,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:09:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:09:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-01-27 15:09:04,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2024-01-27 15:09:04,071 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 106 flow. Second operand 3 states and 98 transitions. [2024-01-27 15:09:04,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 187 flow [2024-01-27 15:09:04,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:09:04,074 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 118 flow [2024-01-27 15:09:04,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2024-01-27 15:09:04,077 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2024-01-27 15:09:04,077 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 118 flow [2024-01-27 15:09:04,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:04,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:04,077 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:04,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:09:04,078 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-01-27 15:09:04,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:04,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1943065003, now seen corresponding path program 1 times [2024-01-27 15:09:04,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:04,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824960159] [2024-01-27 15:09:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:04,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:04,099 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:09:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:04,116 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:09:04,116 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:09:04,117 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-01-27 15:09:04,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-01-27 15:09:04,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-01-27 15:09:04,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-01-27 15:09:04,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-01-27 15:09:04,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-01-27 15:09:04,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:09:04,121 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-01-27 15:09:04,121 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:09:04,121 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-27 15:09:04,154 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:09:04,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 75 transitions, 206 flow [2024-01-27 15:09:04,161 INFO L124 PetriNetUnfolderBase]: 6/55 cut-off events. [2024-01-27 15:09:04,161 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-27 15:09:04,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 55 events. 6/55 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 105 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 71. Up to 5 conditions per place. [2024-01-27 15:09:04,162 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 75 transitions, 206 flow [2024-01-27 15:09:04,162 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 44 transitions, 119 flow [2024-01-27 15:09:04,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:09:04,167 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;@62a3fb5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:09:04,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-01-27 15:09:04,169 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:09:04,169 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2024-01-27 15:09:04,169 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:09:04,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:04,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:04,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:09:04,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:04,170 INFO L85 PathProgramCache]: Analyzing trace with hash 2108859539, now seen corresponding path program 1 times [2024-01-27 15:09:04,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:04,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898251711] [2024-01-27 15:09:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:04,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:04,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:04,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898251711] [2024-01-27 15:09:04,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898251711] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:04,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:04,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:09:04,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234982569] [2024-01-27 15:09:04,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:04,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:09:04,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:04,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:09:04,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:09:04,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 75 [2024-01-27 15:09:04,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:04,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:04,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 75 [2024-01-27 15:09:04,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:05,909 INFO L124 PetriNetUnfolderBase]: 19029/25539 cut-off events. [2024-01-27 15:09:05,909 INFO L125 PetriNetUnfolderBase]: For 3395/3395 co-relation queries the response was YES. [2024-01-27 15:09:05,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50616 conditions, 25539 events. 19029/25539 cut-off events. For 3395/3395 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 144641 event pairs, 3960 based on Foata normal form. 11087/36401 useless extension candidates. Maximal degree in co-relation 50603. Up to 22390 conditions per place. [2024-01-27 15:09:06,066 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 34 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2024-01-27 15:09:06,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 234 flow [2024-01-27 15:09:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:09:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:09:06,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-01-27 15:09:06,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822222222222222 [2024-01-27 15:09:06,068 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 119 flow. Second operand 3 states and 131 transitions. [2024-01-27 15:09:06,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 234 flow [2024-01-27 15:09:06,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 221 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-27 15:09:06,072 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 131 flow [2024-01-27 15:09:06,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-01-27 15:09:06,073 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2024-01-27 15:09:06,073 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 131 flow [2024-01-27 15:09:06,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:06,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:06,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:06,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:09:06,074 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:09:06,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:06,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1991174929, now seen corresponding path program 1 times [2024-01-27 15:09:06,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:06,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204436836] [2024-01-27 15:09:06,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:06,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:06,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:06,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204436836] [2024-01-27 15:09:06,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204436836] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:06,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:06,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:09:06,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951116010] [2024-01-27 15:09:06,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:06,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:09:06,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:06,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:09:06,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:09:06,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 75 [2024-01-27 15:09:06,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:06,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:06,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 75 [2024-01-27 15:09:06,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:06,301 INFO L124 PetriNetUnfolderBase]: 1176/2367 cut-off events. [2024-01-27 15:09:06,301 INFO L125 PetriNetUnfolderBase]: For 503/503 co-relation queries the response was YES. [2024-01-27 15:09:06,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5235 conditions, 2367 events. 1176/2367 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14756 event pairs, 214 based on Foata normal form. 2343/4619 useless extension candidates. Maximal degree in co-relation 5220. Up to 1539 conditions per place. [2024-01-27 15:09:06,313 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 24 selfloop transitions, 10 changer transitions 0/48 dead transitions. [2024-01-27 15:09:06,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 48 transitions, 231 flow [2024-01-27 15:09:06,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:09:06,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:09:06,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-01-27 15:09:06,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-01-27 15:09:06,315 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 131 flow. Second operand 3 states and 125 transitions. [2024-01-27 15:09:06,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 48 transitions, 231 flow [2024-01-27 15:09:06,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:09:06,317 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 146 flow [2024-01-27 15:09:06,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-01-27 15:09:06,318 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2024-01-27 15:09:06,318 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 146 flow [2024-01-27 15:09:06,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:06,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:06,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:06,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:09:06,319 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:09:06,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:06,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1689741336, now seen corresponding path program 1 times [2024-01-27 15:09:06,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:06,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193272484] [2024-01-27 15:09:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:06,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:06,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:06,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193272484] [2024-01-27 15:09:06,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193272484] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:06,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:06,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:09:06,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991041811] [2024-01-27 15:09:06,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:06,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:09:06,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:06,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:09:06,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:09:06,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 75 [2024-01-27 15:09:06,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:06,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:06,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 75 [2024-01-27 15:09:06,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:06,725 INFO L124 PetriNetUnfolderBase]: 1852/3652 cut-off events. [2024-01-27 15:09:06,725 INFO L125 PetriNetUnfolderBase]: For 1083/1116 co-relation queries the response was YES. [2024-01-27 15:09:06,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9531 conditions, 3652 events. 1852/3652 cut-off events. For 1083/1116 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 25053 event pairs, 85 based on Foata normal form. 36/3672 useless extension candidates. Maximal degree in co-relation 9516. Up to 2321 conditions per place. [2024-01-27 15:09:06,745 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 49 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-01-27 15:09:06,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 392 flow [2024-01-27 15:09:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:09:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:09:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2024-01-27 15:09:06,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433333333333333 [2024-01-27 15:09:06,746 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 146 flow. Second operand 4 states and 163 transitions. [2024-01-27 15:09:06,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 392 flow [2024-01-27 15:09:06,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:09:06,750 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 188 flow [2024-01-27 15:09:06,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2024-01-27 15:09:06,751 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-01-27 15:09:06,751 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 188 flow [2024-01-27 15:09:06,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:06,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:06,752 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:06,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-27 15:09:06,752 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:09:06,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1318144147, now seen corresponding path program 1 times [2024-01-27 15:09:06,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:06,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368320995] [2024-01-27 15:09:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:06,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:06,763 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:09:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:06,771 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:09:06,771 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:09:06,771 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-01-27 15:09:06,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-01-27 15:09:06,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2024-01-27 15:09:06,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-01-27 15:09:06,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-01-27 15:09:06,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-01-27 15:09:06,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-01-27 15:09:06,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-27 15:09:06,772 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-01-27 15:09:06,773 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:09:06,773 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-01-27 15:09:06,795 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:09:06,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 92 transitions, 264 flow [2024-01-27 15:09:06,800 INFO L124 PetriNetUnfolderBase]: 7/65 cut-off events. [2024-01-27 15:09:06,800 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-27 15:09:06,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 65 events. 7/65 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 132 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2024-01-27 15:09:06,801 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 92 transitions, 264 flow [2024-01-27 15:09:06,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 51 transitions, 145 flow [2024-01-27 15:09:06,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:09:06,802 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;@62a3fb5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:09:06,802 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-01-27 15:09:06,803 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:09:06,803 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2024-01-27 15:09:06,804 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:09:06,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:06,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:06,804 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-01-27 15:09:06,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:06,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1036733724, now seen corresponding path program 1 times [2024-01-27 15:09:06,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:06,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590481915] [2024-01-27 15:09:06,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:06,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:06,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:06,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590481915] [2024-01-27 15:09:06,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590481915] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:06,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:06,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:09:06,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669442691] [2024-01-27 15:09:06,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:06,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:09:06,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:06,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:09:06,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:09:06,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 92 [2024-01-27 15:09:06,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:06,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:06,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 92 [2024-01-27 15:09:06,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:13,959 INFO L124 PetriNetUnfolderBase]: 91293/116751 cut-off events. [2024-01-27 15:09:13,960 INFO L125 PetriNetUnfolderBase]: For 19847/19847 co-relation queries the response was YES. [2024-01-27 15:09:14,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233065 conditions, 116751 events. 91293/116751 cut-off events. For 19847/19847 co-relation queries the response was YES. Maximal size of possible extension queue 3851. Compared 682770 event pairs, 21477 based on Foata normal form. 51884/167991 useless extension candidates. Maximal degree in co-relation 233051. Up to 105970 conditions per place. [2024-01-27 15:09:14,897 INFO L140 encePairwiseOnDemand]: 77/92 looper letters, 40 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-01-27 15:09:14,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 289 flow [2024-01-27 15:09:14,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:09:14,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:09:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2024-01-27 15:09:14,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572463768115942 [2024-01-27 15:09:14,898 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 145 flow. Second operand 3 states and 158 transitions. [2024-01-27 15:09:14,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 289 flow [2024-01-27 15:09:14,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 264 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-01-27 15:09:14,903 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 156 flow [2024-01-27 15:09:14,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-01-27 15:09:14,903 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -5 predicate places. [2024-01-27 15:09:14,903 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 156 flow [2024-01-27 15:09:14,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:14,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:14,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:14,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-27 15:09:14,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-01-27 15:09:14,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:14,905 INFO L85 PathProgramCache]: Analyzing trace with hash 413531057, now seen corresponding path program 1 times [2024-01-27 15:09:14,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:14,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491975451] [2024-01-27 15:09:14,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:14,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:14,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:14,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491975451] [2024-01-27 15:09:14,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491975451] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:14,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:14,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:09:14,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884871490] [2024-01-27 15:09:14,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:14,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:09:14,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:14,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:09:14,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:09:14,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 92 [2024-01-27 15:09:14,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:14,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:14,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 92 [2024-01-27 15:09:14,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:15,262 INFO L124 PetriNetUnfolderBase]: 2865/5542 cut-off events. [2024-01-27 15:09:15,262 INFO L125 PetriNetUnfolderBase]: For 1439/1439 co-relation queries the response was YES. [2024-01-27 15:09:15,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12335 conditions, 5542 events. 2865/5542 cut-off events. For 1439/1439 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 38934 event pairs, 523 based on Foata normal form. 7138/12493 useless extension candidates. Maximal degree in co-relation 12319. Up to 3714 conditions per place. [2024-01-27 15:09:15,291 INFO L140 encePairwiseOnDemand]: 80/92 looper letters, 28 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2024-01-27 15:09:15,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 275 flow [2024-01-27 15:09:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:09:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:09:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2024-01-27 15:09:15,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2024-01-27 15:09:15,293 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 156 flow. Second operand 3 states and 152 transitions. [2024-01-27 15:09:15,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 275 flow [2024-01-27 15:09:15,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:09:15,297 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 174 flow [2024-01-27 15:09:15,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-01-27 15:09:15,298 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2024-01-27 15:09:15,298 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 174 flow [2024-01-27 15:09:15,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:15,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:15,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:15,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-27 15:09:15,299 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-01-27 15:09:15,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:15,299 INFO L85 PathProgramCache]: Analyzing trace with hash -2017108118, now seen corresponding path program 1 times [2024-01-27 15:09:15,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:15,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446668178] [2024-01-27 15:09:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:15,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:15,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:15,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446668178] [2024-01-27 15:09:15,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446668178] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:15,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:15,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:09:15,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11636161] [2024-01-27 15:09:15,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:15,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:09:15,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:15,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:09:15,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:09:15,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 92 [2024-01-27 15:09:15,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:15,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:15,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 92 [2024-01-27 15:09:15,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:15,907 INFO L124 PetriNetUnfolderBase]: 4277/8114 cut-off events. [2024-01-27 15:09:15,907 INFO L125 PetriNetUnfolderBase]: For 2275/2338 co-relation queries the response was YES. [2024-01-27 15:09:15,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21474 conditions, 8114 events. 4277/8114 cut-off events. For 2275/2338 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 60795 event pairs, 161 based on Foata normal form. 57/8151 useless extension candidates. Maximal degree in co-relation 21458. Up to 5809 conditions per place. [2024-01-27 15:09:15,959 INFO L140 encePairwiseOnDemand]: 85/92 looper letters, 58 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2024-01-27 15:09:15,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 472 flow [2024-01-27 15:09:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:09:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:09:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 198 transitions. [2024-01-27 15:09:15,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380434782608695 [2024-01-27 15:09:15,961 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 174 flow. Second operand 4 states and 198 transitions. [2024-01-27 15:09:15,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 472 flow [2024-01-27 15:09:15,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 84 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:09:15,969 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 226 flow [2024-01-27 15:09:15,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-01-27 15:09:15,971 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2024-01-27 15:09:15,971 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 226 flow [2024-01-27 15:09:15,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:15,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:15,972 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:15,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-27 15:09:15,972 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-01-27 15:09:15,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:15,972 INFO L85 PathProgramCache]: Analyzing trace with hash -749236377, now seen corresponding path program 2 times [2024-01-27 15:09:15,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:15,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406273841] [2024-01-27 15:09:15,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:15,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:16,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:16,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406273841] [2024-01-27 15:09:16,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406273841] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:09:16,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352958219] [2024-01-27 15:09:16,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:09:16,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:09:16,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:09:16,069 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) [2024-01-27 15:09:16,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:09:16,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:09:16,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:09:16,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:09:16,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:09:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:16,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:09:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:16,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352958219] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:09:16,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:09:16,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-01-27 15:09:16,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965765642] [2024-01-27 15:09:16,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:09:16,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:09:16,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:16,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:09:16,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:09:16,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 92 [2024-01-27 15:09:16,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 226 flow. Second operand has 11 states, 11 states have (on average 35.54545454545455) internal successors, (391), 11 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:16,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:16,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 92 [2024-01-27 15:09:16,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:18,155 INFO L124 PetriNetUnfolderBase]: 10547/20010 cut-off events. [2024-01-27 15:09:18,156 INFO L125 PetriNetUnfolderBase]: For 8600/8999 co-relation queries the response was YES. [2024-01-27 15:09:18,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50172 conditions, 20010 events. 10547/20010 cut-off events. For 8600/8999 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 173177 event pairs, 2022 based on Foata normal form. 183/20131 useless extension candidates. Maximal degree in co-relation 50153. Up to 6603 conditions per place. [2024-01-27 15:09:18,266 INFO L140 encePairwiseOnDemand]: 85/92 looper letters, 59 selfloop transitions, 26 changer transitions 0/100 dead transitions. [2024-01-27 15:09:18,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 598 flow [2024-01-27 15:09:18,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:09:18,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:09:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 236 transitions. [2024-01-27 15:09:18,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130434782608696 [2024-01-27 15:09:18,268 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 226 flow. Second operand 5 states and 236 transitions. [2024-01-27 15:09:18,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 598 flow [2024-01-27 15:09:18,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 576 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-01-27 15:09:18,275 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 333 flow [2024-01-27 15:09:18,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2024-01-27 15:09:18,275 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2024-01-27 15:09:18,275 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 333 flow [2024-01-27 15:09:18,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.54545454545455) internal successors, (391), 11 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:18,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:18,276 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:18,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:09:18,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:09:18,485 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-01-27 15:09:18,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:18,485 INFO L85 PathProgramCache]: Analyzing trace with hash -866430764, now seen corresponding path program 1 times [2024-01-27 15:09:18,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:18,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140594768] [2024-01-27 15:09:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:18,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:18,514 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:09:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:18,546 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:09:18,546 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:09:18,546 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-01-27 15:09:18,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2024-01-27 15:09:18,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2024-01-27 15:09:18,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2024-01-27 15:09:18,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2024-01-27 15:09:18,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-01-27 15:09:18,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-01-27 15:09:18,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-01-27 15:09:18,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-01-27 15:09:18,548 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2024-01-27 15:09:18,548 WARN L234 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:09:18,548 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-01-27 15:09:18,578 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:09:18,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 109 transitions, 326 flow [2024-01-27 15:09:18,583 INFO L124 PetriNetUnfolderBase]: 8/75 cut-off events. [2024-01-27 15:09:18,584 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-01-27 15:09:18,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 75 events. 8/75 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 141 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 104. Up to 7 conditions per place. [2024-01-27 15:09:18,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 109 transitions, 326 flow [2024-01-27 15:09:18,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 58 transitions, 173 flow [2024-01-27 15:09:18,586 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:09:18,586 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;@62a3fb5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:09:18,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-01-27 15:09:18,587 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:09:18,587 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2024-01-27 15:09:18,587 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:09:18,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:18,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:18,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-27 15:09:18,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:18,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1633368691, now seen corresponding path program 1 times [2024-01-27 15:09:18,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:18,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42543224] [2024-01-27 15:09:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:18,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:18,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:18,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42543224] [2024-01-27 15:09:18,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42543224] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:18,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:18,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:09:18,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53373244] [2024-01-27 15:09:18,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:18,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:09:18,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:18,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:09:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:09:18,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 109 [2024-01-27 15:09:18,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:18,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:18,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 109 [2024-01-27 15:09:18,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand