./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c -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 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:35:02,890 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:35:02,941 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:35:02,946 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:35:02,948 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:35:02,979 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:35:02,980 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:35:02,980 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:35:02,981 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:35:02,983 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:35:02,983 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:35:02,984 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:35:02,984 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:35:02,985 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:35:02,985 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:35:02,988 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:35:02,989 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:35:02,989 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:35:02,989 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:35:02,989 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:35:02,990 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:35:02,991 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:35:02,991 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:35:02,991 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:35:02,992 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:35:02,992 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:35:02,992 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:35:02,992 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:35:02,993 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:35:02,993 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:35:02,994 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:35:02,994 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:35:02,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:35:02,995 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:35:02,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:35:02,996 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:35:02,996 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:35:02,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:35:02,996 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:35:02,996 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:35:02,997 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:35:02,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:35:02,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2024-10-14 14:35:03,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:35:03,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:35:03,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:35:03,295 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:35:03,296 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:35:03,297 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-10-14 14:35:04,775 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:35:04,974 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:35:04,974 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-10-14 14:35:04,985 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40afecdb4/d75401a572524b0db309b73b65f156ee/FLAG2970a950c [2024-10-14 14:35:05,347 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40afecdb4/d75401a572524b0db309b73b65f156ee [2024-10-14 14:35:05,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:35:05,350 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:35:05,351 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:35:05,351 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:35:05,357 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:35:05,358 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:35:05" (1/1) ... [2024-10-14 14:35:05,361 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@589149b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:05, skipping insertion in model container [2024-10-14 14:35:05,361 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:35:05" (1/1) ... [2024-10-14 14:35:05,385 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:35:05,636 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c[4955,4968] [2024-10-14 14:35:05,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:35:05,662 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:35:05,707 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c[4955,4968] [2024-10-14 14:35:05,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:35:05,749 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:35:05,750 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:05 WrapperNode [2024-10-14 14:35:05,750 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:35:05,751 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:35:05,751 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:35:05,752 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:35:05,758 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:05" (1/1) ... [2024-10-14 14:35:05,772 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:05" (1/1) ... [2024-10-14 14:35:05,819 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 407 [2024-10-14 14:35:05,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:35:05,821 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:35:05,821 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:35:05,821 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:35:05,832 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:05" (1/1) ... [2024-10-14 14:35:05,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:05" (1/1) ... [2024-10-14 14:35:05,836 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:05" (1/1) ... [2024-10-14 14:35:05,861 INFO L175 MemorySlicer]: Split 20 memory accesses to 2 slices as follows [2, 18]. 90 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]. [2024-10-14 14:35:05,862 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:05" (1/1) ... [2024-10-14 14:35:05,862 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:05" (1/1) ... [2024-10-14 14:35:05,880 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:05" (1/1) ... [2024-10-14 14:35:05,887 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:05" (1/1) ... [2024-10-14 14:35:05,889 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:05" (1/1) ... [2024-10-14 14:35:05,892 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:05" (1/1) ... [2024-10-14 14:35:05,896 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:35:05,897 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:35:05,897 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:35:05,897 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:35:05,898 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:05" (1/1) ... [2024-10-14 14:35:05,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:35:05,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:05,935 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) [2024-10-14 14:35:05,940 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 [2024-10-14 14:35:05,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:35:05,988 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 14:35:05,988 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 14:35:05,988 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 14:35:05,988 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 14:35:05,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:35:05,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:35:05,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 14:35:05,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 14:35:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 14:35:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:35:05,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:35:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 14:35:05,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 14:35:05,993 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:35:06,137 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:35:06,140 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:35:06,823 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:35:06,823 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:35:07,460 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:35:07,461 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-14 14:35:07,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:35:07 BoogieIcfgContainer [2024-10-14 14:35:07,462 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:35:07,464 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:35:07,464 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:35:07,467 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:35:07,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:35:05" (1/3) ... [2024-10-14 14:35:07,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534c5bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:35:07, skipping insertion in model container [2024-10-14 14:35:07,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:05" (2/3) ... [2024-10-14 14:35:07,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534c5bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:35:07, skipping insertion in model container [2024-10-14 14:35:07,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:35:07" (3/3) ... [2024-10-14 14:35:07,471 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2024-10-14 14:35:07,489 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:35:07,490 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:35:07,490 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:35:07,575 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 14:35:07,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 34 transitions, 82 flow [2024-10-14 14:35:07,643 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2024-10-14 14:35:07,644 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:35:07,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 8/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 42 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-10-14 14:35:07,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 34 transitions, 82 flow [2024-10-14 14:35:07,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 31 transitions, 74 flow [2024-10-14 14:35:07,658 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:35:07,665 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2380be92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:35:07,666 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-14 14:35:07,710 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:35:07,710 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2024-10-14 14:35:07,711 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:35:07,711 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:07,712 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:07,712 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:07,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:07,717 INFO L85 PathProgramCache]: Analyzing trace with hash 423359638, now seen corresponding path program 1 times [2024-10-14 14:35:07,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:07,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297844379] [2024-10-14 14:35:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:07,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:35:08,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:08,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297844379] [2024-10-14 14:35:08,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297844379] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:35:08,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:35:08,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:35:08,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093718852] [2024-10-14 14:35:08,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:35:08,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:35:08,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:08,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:35:08,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:35:08,235 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:08,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:08,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:08,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:08,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:08,454 INFO L124 PetriNetUnfolderBase]: 202/329 cut-off events. [2024-10-14 14:35:08,455 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-10-14 14:35:08,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 329 events. 202/329 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1001 event pairs, 138 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 620. Up to 327 conditions per place. [2024-10-14 14:35:08,462 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 26 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2024-10-14 14:35:08,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 134 flow [2024-10-14 14:35:08,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:35:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:35:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2024-10-14 14:35:08,476 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4215686274509804 [2024-10-14 14:35:08,478 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 74 flow. Second operand 3 states and 43 transitions. [2024-10-14 14:35:08,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 134 flow [2024-10-14 14:35:08,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 14:35:08,484 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 84 flow [2024-10-14 14:35:08,486 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2024-10-14 14:35:08,491 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2024-10-14 14:35:08,492 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 84 flow [2024-10-14 14:35:08,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:08,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:08,492 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:08,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:35:08,493 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:08,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:08,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1120329308, now seen corresponding path program 1 times [2024-10-14 14:35:08,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:08,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834507223] [2024-10-14 14:35:08,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:08,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:35:08,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:08,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834507223] [2024-10-14 14:35:08,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834507223] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:08,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644141035] [2024-10-14 14:35:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:08,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:08,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:08,725 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) [2024-10-14 14:35:08,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 14:35:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:08,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 14:35:08,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:35:08,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:35:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:35:09,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644141035] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:35:09,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:35:09,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-10-14 14:35:09,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476406936] [2024-10-14 14:35:09,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:35:09,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 14:35:09,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:09,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 14:35:09,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-10-14 14:35:09,032 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:09,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 84 flow. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:09,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:09,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:09,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:09,229 INFO L124 PetriNetUnfolderBase]: 202/335 cut-off events. [2024-10-14 14:35:09,229 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-14 14:35:09,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 335 events. 202/335 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 999 event pairs, 138 based on Foata normal form. 3/275 useless extension candidates. Maximal degree in co-relation 666. Up to 327 conditions per place. [2024-10-14 14:35:09,234 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 26 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2024-10-14 14:35:09,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 37 transitions, 180 flow [2024-10-14 14:35:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:35:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:35:09,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-10-14 14:35:09,239 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2024-10-14 14:35:09,239 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 84 flow. Second operand 6 states and 60 transitions. [2024-10-14 14:35:09,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 37 transitions, 180 flow [2024-10-14 14:35:09,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:35:09,241 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 146 flow [2024-10-14 14:35:09,242 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2024-10-14 14:35:09,243 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-10-14 14:35:09,243 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 146 flow [2024-10-14 14:35:09,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:09,244 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:09,244 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:09,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 14:35:09,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:09,449 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:09,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:09,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1411407270, now seen corresponding path program 2 times [2024-10-14 14:35:09,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:09,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443918899] [2024-10-14 14:35:09,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:09,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 14:35:09,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:09,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443918899] [2024-10-14 14:35:09,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443918899] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:09,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625367312] [2024-10-14 14:35:09,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:35:09,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:09,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:09,785 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:09,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 14:35:09,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 14:35:09,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:35:09,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-14 14:35:09,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-14 14:35:10,823 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:35:10,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625367312] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:35:10,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:35:10,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-10-14 14:35:10,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693837347] [2024-10-14 14:35:10,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:35:10,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:35:10,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:10,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:35:10,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-10-14 14:35:10,825 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:10,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:10,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:10,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:10,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:11,180 INFO L124 PetriNetUnfolderBase]: 244/430 cut-off events. [2024-10-14 14:35:11,181 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-14 14:35:11,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 430 events. 244/430 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1540 event pairs, 138 based on Foata normal form. 1/363 useless extension candidates. Maximal degree in co-relation 848. Up to 319 conditions per place. [2024-10-14 14:35:11,185 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 45 selfloop transitions, 1 changer transitions 9/56 dead transitions. [2024-10-14 14:35:11,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 299 flow [2024-10-14 14:35:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:35:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:35:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2024-10-14 14:35:11,186 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4485294117647059 [2024-10-14 14:35:11,187 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 146 flow. Second operand 4 states and 61 transitions. [2024-10-14 14:35:11,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 299 flow [2024-10-14 14:35:11,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 283 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-14 14:35:11,189 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 139 flow [2024-10-14 14:35:11,191 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2024-10-14 14:35:11,192 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-10-14 14:35:11,192 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 139 flow [2024-10-14 14:35:11,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:11,193 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:11,193 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:11,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 14:35:11,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-14 14:35:11,394 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:11,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:11,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1556262304, now seen corresponding path program 3 times [2024-10-14 14:35:11,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:11,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552021339] [2024-10-14 14:35:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:11,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 14:35:11,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:11,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552021339] [2024-10-14 14:35:11,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552021339] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:11,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870304978] [2024-10-14 14:35:11,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:35:11,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:11,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:11,637 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:11,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 14:35:11,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-14 14:35:11,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:35:11,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-14 14:35:11,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-14 14:35:12,260 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:35:12,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870304978] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:35:12,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:35:12,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-10-14 14:35:12,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870388309] [2024-10-14 14:35:12,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:35:12,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:35:12,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:12,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:35:12,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-10-14 14:35:12,261 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:12,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:12,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:12,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:12,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:12,512 INFO L124 PetriNetUnfolderBase]: 268/487 cut-off events. [2024-10-14 14:35:12,513 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-10-14 14:35:12,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1070 conditions, 487 events. 268/487 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1774 event pairs, 181 based on Foata normal form. 5/436 useless extension candidates. Maximal degree in co-relation 1048. Up to 393 conditions per place. [2024-10-14 14:35:12,515 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 45 selfloop transitions, 1 changer transitions 7/54 dead transitions. [2024-10-14 14:35:12,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 288 flow [2024-10-14 14:35:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:35:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:35:12,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2024-10-14 14:35:12,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4338235294117647 [2024-10-14 14:35:12,517 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 139 flow. Second operand 4 states and 59 transitions. [2024-10-14 14:35:12,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 288 flow [2024-10-14 14:35:12,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 282 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-14 14:35:12,521 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 145 flow [2024-10-14 14:35:12,522 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-10-14 14:35:12,523 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-10-14 14:35:12,523 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 145 flow [2024-10-14 14:35:12,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:12,523 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:12,523 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:12,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 14:35:12,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:12,724 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:12,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2075253266, now seen corresponding path program 1 times [2024-10-14 14:35:12,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:12,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796679669] [2024-10-14 14:35:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:12,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-14 14:35:12,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:12,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796679669] [2024-10-14 14:35:12,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796679669] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:35:12,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:35:12,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:35:12,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836134635] [2024-10-14 14:35:12,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:35:12,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:35:12,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:12,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:35:12,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:35:12,881 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:12,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:12,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:12,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:12,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:13,018 INFO L124 PetriNetUnfolderBase]: 192/347 cut-off events. [2024-10-14 14:35:13,019 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2024-10-14 14:35:13,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 347 events. 192/347 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1052 event pairs, 73 based on Foata normal form. 21/336 useless extension candidates. Maximal degree in co-relation 777. Up to 271 conditions per place. [2024-10-14 14:35:13,021 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 39 selfloop transitions, 2 changer transitions 5/47 dead transitions. [2024-10-14 14:35:13,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 263 flow [2024-10-14 14:35:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:35:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:35:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-10-14 14:35:13,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-10-14 14:35:13,023 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 145 flow. Second operand 3 states and 49 transitions. [2024-10-14 14:35:13,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 263 flow [2024-10-14 14:35:13,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 260 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-14 14:35:13,027 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 148 flow [2024-10-14 14:35:13,028 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-10-14 14:35:13,028 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-10-14 14:35:13,029 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 148 flow [2024-10-14 14:35:13,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:13,030 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:13,031 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:13,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 14:35:13,031 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:13,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:13,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1291654264, now seen corresponding path program 1 times [2024-10-14 14:35:13,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:13,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024516336] [2024-10-14 14:35:13,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:13,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 14:35:13,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:13,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024516336] [2024-10-14 14:35:13,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024516336] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:13,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022203163] [2024-10-14 14:35:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:13,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:13,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:13,235 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:13,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 14:35:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:13,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 14:35:13,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 14:35:13,473 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:35:13,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 14:35:13,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022203163] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:35:13,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:35:13,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-10-14 14:35:13,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847811362] [2024-10-14 14:35:13,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:35:13,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 14:35:13,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:13,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 14:35:13,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2024-10-14 14:35:13,548 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:13,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 148 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:13,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:13,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:13,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:13,728 INFO L124 PetriNetUnfolderBase]: 171/306 cut-off events. [2024-10-14 14:35:13,729 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-10-14 14:35:13,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 306 events. 171/306 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 834 event pairs, 128 based on Foata normal form. 1/275 useless extension candidates. Maximal degree in co-relation 667. Up to 296 conditions per place. [2024-10-14 14:35:13,732 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 26 selfloop transitions, 12 changer transitions 0/39 dead transitions. [2024-10-14 14:35:13,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 236 flow [2024-10-14 14:35:13,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 14:35:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-14 14:35:13,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 59 transitions. [2024-10-14 14:35:13,733 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.24789915966386555 [2024-10-14 14:35:13,734 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 148 flow. Second operand 7 states and 59 transitions. [2024-10-14 14:35:13,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 236 flow [2024-10-14 14:35:13,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 228 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-10-14 14:35:13,735 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 186 flow [2024-10-14 14:35:13,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-10-14 14:35:13,736 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-10-14 14:35:13,738 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 186 flow [2024-10-14 14:35:13,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:13,738 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:13,739 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:13,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 14:35:13,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:13,939 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:13,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:13,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1270998506, now seen corresponding path program 2 times [2024-10-14 14:35:13,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:13,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019047389] [2024-10-14 14:35:13,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:13,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:14,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:14,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019047389] [2024-10-14 14:35:14,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019047389] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:35:14,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:35:14,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:35:14,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093695055] [2024-10-14 14:35:14,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:35:14,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:35:14,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:14,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:35:14,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:35:14,132 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:14,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:14,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:14,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:14,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:14,280 INFO L124 PetriNetUnfolderBase]: 240/423 cut-off events. [2024-10-14 14:35:14,280 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-10-14 14:35:14,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 423 events. 240/423 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1309 event pairs, 139 based on Foata normal form. 16/386 useless extension candidates. Maximal degree in co-relation 885. Up to 306 conditions per place. [2024-10-14 14:35:14,283 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 47 selfloop transitions, 3 changer transitions 1/52 dead transitions. [2024-10-14 14:35:14,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 317 flow [2024-10-14 14:35:14,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:35:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:35:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-10-14 14:35:14,287 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-10-14 14:35:14,287 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 186 flow. Second operand 3 states and 49 transitions. [2024-10-14 14:35:14,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 317 flow [2024-10-14 14:35:14,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 293 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-14 14:35:14,290 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 177 flow [2024-10-14 14:35:14,292 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-10-14 14:35:14,293 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2024-10-14 14:35:14,293 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 177 flow [2024-10-14 14:35:14,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:14,293 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:14,293 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:14,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-14 14:35:14,293 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:14,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:14,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1017083656, now seen corresponding path program 1 times [2024-10-14 14:35:14,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:14,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170696112] [2024-10-14 14:35:14,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:14,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-14 14:35:14,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:14,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170696112] [2024-10-14 14:35:14,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170696112] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:35:14,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:35:14,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:35:14,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443858855] [2024-10-14 14:35:14,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:35:14,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:35:14,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:14,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:35:14,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:35:14,552 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:14,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:14,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:14,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:14,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:14,745 INFO L124 PetriNetUnfolderBase]: 333/579 cut-off events. [2024-10-14 14:35:14,745 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2024-10-14 14:35:14,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 579 events. 333/579 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1979 event pairs, 191 based on Foata normal form. 21/558 useless extension candidates. Maximal degree in co-relation 1313. Up to 423 conditions per place. [2024-10-14 14:35:14,749 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 48 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2024-10-14 14:35:14,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 320 flow [2024-10-14 14:35:14,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:35:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:35:14,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-10-14 14:35:14,750 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-10-14 14:35:14,750 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 177 flow. Second operand 3 states and 48 transitions. [2024-10-14 14:35:14,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 320 flow [2024-10-14 14:35:14,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 315 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:35:14,752 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 189 flow [2024-10-14 14:35:14,752 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-10-14 14:35:14,753 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2024-10-14 14:35:14,753 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 189 flow [2024-10-14 14:35:14,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:14,753 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:14,753 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:14,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 14:35:14,754 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:14,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:14,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1297553171, now seen corresponding path program 1 times [2024-10-14 14:35:14,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:14,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904273022] [2024-10-14 14:35:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:14,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:35:25,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:25,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904273022] [2024-10-14 14:35:25,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904273022] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:25,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635719505] [2024-10-14 14:35:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:25,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:25,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:25,840 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:25,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 14:35:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:26,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-14 14:35:26,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:27,834 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:35:27,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 276 [2024-10-14 14:35:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:29,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:35:31,919 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-10-14 14:35:31,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 393 treesize of output 356 [2024-10-14 14:35:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:33,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635719505] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:35:33,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:35:33,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8, 8] total 34 [2024-10-14 14:35:33,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787342337] [2024-10-14 14:35:33,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:35:33,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-14 14:35:33,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:33,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-14 14:35:33,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2024-10-14 14:35:33,328 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:33,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 189 flow. Second operand has 34 states, 34 states have (on average 5.470588235294118) internal successors, (186), 34 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:33,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:33,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:33,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:37,358 INFO L124 PetriNetUnfolderBase]: 746/1296 cut-off events. [2024-10-14 14:35:37,358 INFO L125 PetriNetUnfolderBase]: For 420/420 co-relation queries the response was YES. [2024-10-14 14:35:37,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3158 conditions, 1296 events. 746/1296 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5840 event pairs, 139 based on Foata normal form. 2/1298 useless extension candidates. Maximal degree in co-relation 3092. Up to 270 conditions per place. [2024-10-14 14:35:37,365 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 114 selfloop transitions, 42 changer transitions 23/180 dead transitions. [2024-10-14 14:35:37,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 180 transitions, 945 flow [2024-10-14 14:35:37,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-14 14:35:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-14 14:35:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 252 transitions. [2024-10-14 14:35:37,368 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.27450980392156865 [2024-10-14 14:35:37,368 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 189 flow. Second operand 27 states and 252 transitions. [2024-10-14 14:35:37,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 180 transitions, 945 flow [2024-10-14 14:35:37,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 180 transitions, 928 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:35:37,372 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 433 flow [2024-10-14 14:35:37,372 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=433, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-10-14 14:35:37,373 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2024-10-14 14:35:37,373 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 433 flow [2024-10-14 14:35:37,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.470588235294118) internal successors, (186), 34 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:37,374 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:37,374 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:37,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 14:35:37,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:37,575 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:37,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash 552162979, now seen corresponding path program 2 times [2024-10-14 14:35:37,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:37,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163814293] [2024-10-14 14:35:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:37,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:35:45,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163814293] [2024-10-14 14:35:45,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163814293] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740809771] [2024-10-14 14:35:45,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:35:45,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:45,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:45,072 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:45,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 14:35:45,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:35:45,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:35:45,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-10-14 14:35:45,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:45,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2024-10-14 14:35:45,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 14:35:45,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 14:35:45,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2024-10-14 14:35:45,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 14:35:45,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 60 [2024-10-14 14:35:45,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 14:35:45,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 14:35:45,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2024-10-14 14:35:45,684 INFO L349 Elim1Store]: treesize reduction 76, result has 28.3 percent of original size [2024-10-14 14:35:45,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 69 [2024-10-14 14:35:45,939 INFO L349 Elim1Store]: treesize reduction 76, result has 28.3 percent of original size [2024-10-14 14:35:45,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 69 [2024-10-14 14:35:46,149 INFO L349 Elim1Store]: treesize reduction 76, result has 28.3 percent of original size [2024-10-14 14:35:46,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 69 [2024-10-14 14:35:47,949 INFO L349 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2024-10-14 14:35:47,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 375 treesize of output 315 [2024-10-14 14:35:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 14:35:49,053 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:35:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:53,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740809771] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:35:53,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:35:53,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 10] total 47 [2024-10-14 14:35:53,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501824635] [2024-10-14 14:35:53,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:35:53,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-14 14:35:53,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:53,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-14 14:35:53,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2024-10-14 14:35:53,026 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:53,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 433 flow. Second operand has 47 states, 47 states have (on average 5.042553191489362) internal successors, (237), 47 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:53,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:53,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:53,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:59,572 INFO L124 PetriNetUnfolderBase]: 1061/1822 cut-off events. [2024-10-14 14:35:59,573 INFO L125 PetriNetUnfolderBase]: For 1712/1712 co-relation queries the response was YES. [2024-10-14 14:35:59,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5071 conditions, 1822 events. 1061/1822 cut-off events. For 1712/1712 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9080 event pairs, 315 based on Foata normal form. 2/1824 useless extension candidates. Maximal degree in co-relation 5044. Up to 880 conditions per place. [2024-10-14 14:35:59,585 INFO L140 encePairwiseOnDemand]: 17/34 looper letters, 117 selfloop transitions, 86 changer transitions 26/230 dead transitions. [2024-10-14 14:35:59,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 230 transitions, 1445 flow [2024-10-14 14:35:59,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-14 14:35:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-10-14 14:35:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 314 transitions. [2024-10-14 14:35:59,588 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.24960254372019078 [2024-10-14 14:35:59,588 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 433 flow. Second operand 37 states and 314 transitions. [2024-10-14 14:35:59,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 230 transitions, 1445 flow [2024-10-14 14:35:59,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 230 transitions, 1322 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-10-14 14:35:59,609 INFO L231 Difference]: Finished difference. Result has 118 places, 128 transitions, 953 flow [2024-10-14 14:35:59,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=953, PETRI_PLACES=118, PETRI_TRANSITIONS=128} [2024-10-14 14:35:59,610 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-10-14 14:35:59,611 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 128 transitions, 953 flow [2024-10-14 14:35:59,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 5.042553191489362) internal successors, (237), 47 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:59,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:59,612 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:59,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 14:35:59,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:59,813 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:59,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:59,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1158489181, now seen corresponding path program 3 times [2024-10-14 14:35:59,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:59,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759002510] [2024-10-14 14:35:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:59,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:05,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:05,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759002510] [2024-10-14 14:36:05,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759002510] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:05,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273519599] [2024-10-14 14:36:05,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:36:05,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:05,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:05,176 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:05,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 14:36:05,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 14:36:05,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:05,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-10-14 14:36:05,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:06,504 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:36:06,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 325 treesize of output 269 [2024-10-14 14:36:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:36:07,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:08,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:36:08,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 417 treesize of output 395 [2024-10-14 14:36:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:36:10,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273519599] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:36:10,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:36:10,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 8] total 38 [2024-10-14 14:36:10,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436481036] [2024-10-14 14:36:10,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:36:10,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-14 14:36:10,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:10,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-14 14:36:10,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2024-10-14 14:36:10,563 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:10,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 128 transitions, 953 flow. Second operand has 38 states, 38 states have (on average 5.421052631578948) internal successors, (206), 38 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:10,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:10,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:10,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand