./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-name-comparator-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:27:19,710 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:27:19,835 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:27:19,844 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:27:19,849 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:27:19,913 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:27:19,914 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:27:19,914 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:27:19,914 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:27:19,915 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:27:19,915 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:27:19,919 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:27:19,919 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:27:19,920 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:27:19,920 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:27:19,920 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:27:19,920 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:27:19,920 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:27:19,921 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:27:19,921 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:27:19,923 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:27:19,925 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:27:19,926 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:27:19,926 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:27:19,926 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:27:19,926 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:27:19,926 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:27:19,926 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:27:19,926 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:27:19,927 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:27:19,927 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:27:19,927 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:27:19,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:27:19,927 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:27:19,927 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:27:19,927 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:27:19,928 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:27:19,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:27:19,928 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:27:19,928 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:27:19,928 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:27:19,933 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:27:19,933 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 [2024-10-11 14:27:20,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:27:20,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:27:20,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:27:20,307 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:27:20,308 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:27:20,309 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2024-10-11 14:27:21,843 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:27:22,032 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:27:22,033 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2024-10-11 14:27:22,039 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c3e8eded7/7632abe10e3541fca0e409056501e06b/FLAG974fdd14b [2024-10-11 14:27:22,067 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c3e8eded7/7632abe10e3541fca0e409056501e06b [2024-10-11 14:27:22,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:27:22,074 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:27:22,075 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:27:22,075 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:27:22,082 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:27:22,087 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,087 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d5dced1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22, skipping insertion in model container [2024-10-11 14:27:22,087 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,130 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:27:22,362 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-name-comparator-trans.wvr.c[4827,4840] [2024-10-11 14:27:22,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:27:22,386 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:27:22,412 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-name-comparator-trans.wvr.c[4827,4840] [2024-10-11 14:27:22,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:27:22,446 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:27:22,449 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22 WrapperNode [2024-10-11 14:27:22,450 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:27:22,451 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:27:22,451 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:27:22,451 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:27:22,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,480 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,532 INFO L138 Inliner]: procedures = 25, calls = 29, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 304 [2024-10-11 14:27:22,536 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:27:22,537 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:27:22,537 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:27:22,540 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:27:22,557 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,561 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,589 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-11 14:27:22,589 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,589 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,598 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,605 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,606 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,610 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,612 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:27:22,616 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:27:22,616 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:27:22,616 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:27:22,617 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (1/1) ... [2024-10-11 14:27:22,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:27:22,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:22,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:27:22,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:27:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:27:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:27:22,694 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:27:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:27:22,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:27:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 14:27:22,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 14:27:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:27:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:27:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:27:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:27:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:27:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:27:22,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:27:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:27:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:27:22,699 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:27:22,810 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:27:22,812 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:27:23,323 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:27:23,323 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:27:23,895 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:27:23,895 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-11 14:27:23,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:23 BoogieIcfgContainer [2024-10-11 14:27:23,896 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:27:23,897 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:27:23,898 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:27:23,900 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:27:23,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:27:22" (1/3) ... [2024-10-11 14:27:23,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e17158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:23, skipping insertion in model container [2024-10-11 14:27:23,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:22" (2/3) ... [2024-10-11 14:27:23,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e17158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:23, skipping insertion in model container [2024-10-11 14:27:23,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:23" (3/3) ... [2024-10-11 14:27:23,903 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2024-10-11 14:27:23,916 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:27:23,916 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:27:23,916 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:27:23,957 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-11 14:27:23,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 36 transitions, 93 flow [2024-10-11 14:27:24,011 INFO L124 PetriNetUnfolderBase]: 7/33 cut-off events. [2024-10-11 14:27:24,011 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:27:24,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 33 events. 7/33 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-10-11 14:27:24,014 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 36 transitions, 93 flow [2024-10-11 14:27:24,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 32 transitions, 82 flow [2024-10-11 14:27:24,025 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:27:24,030 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;@63cd27d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:27:24,032 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-11 14:27:24,048 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:27:24,049 INFO L124 PetriNetUnfolderBase]: 7/31 cut-off events. [2024-10-11 14:27:24,049 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:27:24,049 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:24,049 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:24,050 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:27:24,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:24,054 INFO L85 PathProgramCache]: Analyzing trace with hash -447705035, now seen corresponding path program 1 times [2024-10-11 14:27:24,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:24,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860335392] [2024-10-11 14:27:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:24,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:27:24,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:24,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860335392] [2024-10-11 14:27:24,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860335392] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:27:24,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:27:24,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:27:24,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663808539] [2024-10-11 14:27:24,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:27:24,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 14:27:24,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:24,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 14:27:24,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 14:27:24,329 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-10-11 14:27:24,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:24,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:24,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-10-11 14:27:24,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:24,584 INFO L124 PetriNetUnfolderBase]: 792/1137 cut-off events. [2024-10-11 14:27:24,585 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-10-11 14:27:24,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2371 conditions, 1137 events. 792/1137 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3706 event pairs, 608 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 2150. Up to 1137 conditions per place. [2024-10-11 14:27:24,592 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 28 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2024-10-11 14:27:24,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 132 flow [2024-10-11 14:27:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 14:27:24,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-11 14:27:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 39 transitions. [2024-10-11 14:27:24,602 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-10-11 14:27:24,603 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 82 flow. Second operand 2 states and 39 transitions. [2024-10-11 14:27:24,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 132 flow [2024-10-11 14:27:24,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 120 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 14:27:24,609 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 64 flow [2024-10-11 14:27:24,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-10-11 14:27:24,617 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2024-10-11 14:27:24,618 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 64 flow [2024-10-11 14:27:24,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:24,618 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:24,618 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:24,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:27:24,618 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:27:24,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:24,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1234612696, now seen corresponding path program 1 times [2024-10-11 14:27:24,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:24,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600291062] [2024-10-11 14:27:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:24,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:27:24,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:24,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600291062] [2024-10-11 14:27:24,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600291062] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:27:24,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:27:24,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:27:24,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116717030] [2024-10-11 14:27:24,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:27:24,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:27:24,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:24,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:27:24,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:27:24,826 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-10-11 14:27:24,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:24,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:24,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-10-11 14:27:24,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:25,059 INFO L124 PetriNetUnfolderBase]: 792/1138 cut-off events. [2024-10-11 14:27:25,059 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-11 14:27:25,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2309 conditions, 1138 events. 792/1138 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3700 event pairs, 608 based on Foata normal form. 0/954 useless extension candidates. Maximal degree in co-relation 2306. Up to 1137 conditions per place. [2024-10-11 14:27:25,067 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 27 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-10-11 14:27:25,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 124 flow [2024-10-11 14:27:25,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:27:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:27:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-10-11 14:27:25,070 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-10-11 14:27:25,070 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 64 flow. Second operand 3 states and 42 transitions. [2024-10-11 14:27:25,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 124 flow [2024-10-11 14:27:25,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:27:25,072 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 76 flow [2024-10-11 14:27:25,072 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-10-11 14:27:25,074 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -2 predicate places. [2024-10-11 14:27:25,074 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 76 flow [2024-10-11 14:27:25,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:25,075 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:25,075 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:25,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:27:25,076 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:27:25,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:25,077 INFO L85 PathProgramCache]: Analyzing trace with hash 321585607, now seen corresponding path program 1 times [2024-10-11 14:27:25,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:25,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496490030] [2024-10-11 14:27:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:25,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:27:25,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:25,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496490030] [2024-10-11 14:27:25,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496490030] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:25,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356562831] [2024-10-11 14:27:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:25,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:25,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:25,267 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:25,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:27:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:25,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 14:27:25,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:27:25,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:27:25,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356562831] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:25,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:25,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 14:27:25,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349953161] [2024-10-11 14:27:25,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:25,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:27:25,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:27:25,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:27:25,448 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-10-11 14:27:25,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:25,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:25,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-10-11 14:27:25,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:25,628 INFO L124 PetriNetUnfolderBase]: 792/1140 cut-off events. [2024-10-11 14:27:25,628 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-11 14:27:25,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2322 conditions, 1140 events. 792/1140 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3700 event pairs, 608 based on Foata normal form. 0/956 useless extension candidates. Maximal degree in co-relation 2317. Up to 1137 conditions per place. [2024-10-11 14:27:25,633 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 27 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-10-11 14:27:25,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 146 flow [2024-10-11 14:27:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:27:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:27:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-10-11 14:27:25,636 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.29444444444444445 [2024-10-11 14:27:25,636 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 76 flow. Second operand 5 states and 53 transitions. [2024-10-11 14:27:25,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 146 flow [2024-10-11 14:27:25,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 142 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:27:25,638 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 98 flow [2024-10-11 14:27:25,638 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-10-11 14:27:25,639 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-10-11 14:27:25,639 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 98 flow [2024-10-11 14:27:25,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:25,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:25,640 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:25,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:25,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:25,841 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:27:25,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:25,842 INFO L85 PathProgramCache]: Analyzing trace with hash 836812775, now seen corresponding path program 2 times [2024-10-11 14:27:25,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:25,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490644074] [2024-10-11 14:27:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:25,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:26,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:26,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490644074] [2024-10-11 14:27:26,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490644074] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:27:26,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:27:26,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:27:26,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524708116] [2024-10-11 14:27:26,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:27:26,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:27:26,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:26,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:27:26,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:27:26,191 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-10-11 14:27:26,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:26,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:26,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-10-11 14:27:26,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:26,454 INFO L124 PetriNetUnfolderBase]: 1435/2062 cut-off events. [2024-10-11 14:27:26,455 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-10-11 14:27:26,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4199 conditions, 2062 events. 1435/2062 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 8255 event pairs, 608 based on Foata normal form. 1/1719 useless extension candidates. Maximal degree in co-relation 4192. Up to 1140 conditions per place. [2024-10-11 14:27:26,463 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 46 selfloop transitions, 2 changer transitions 20/69 dead transitions. [2024-10-11 14:27:26,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 69 transitions, 315 flow [2024-10-11 14:27:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:27:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:27:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2024-10-11 14:27:26,465 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-10-11 14:27:26,465 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 98 flow. Second operand 4 states and 82 transitions. [2024-10-11 14:27:26,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 69 transitions, 315 flow [2024-10-11 14:27:26,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 69 transitions, 305 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-10-11 14:27:26,467 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 102 flow [2024-10-11 14:27:26,467 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-10-11 14:27:26,469 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2024-10-11 14:27:26,469 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 102 flow [2024-10-11 14:27:26,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:26,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:26,470 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:27:26,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:27:26,470 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:27:26,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:26,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1570224414, now seen corresponding path program 1 times [2024-10-11 14:27:26,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:26,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484592799] [2024-10-11 14:27:26,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:26,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:26,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:26,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484592799] [2024-10-11 14:27:26,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484592799] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:27:26,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:27:26,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:27:26,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997035927] [2024-10-11 14:27:26,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:27:26,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:27:26,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:26,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:27:26,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:27:26,788 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-10-11 14:27:26,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:26,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:26,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-10-11 14:27:26,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:27,130 INFO L124 PetriNetUnfolderBase]: 2206/3150 cut-off events. [2024-10-11 14:27:27,131 INFO L125 PetriNetUnfolderBase]: For 695/695 co-relation queries the response was YES. [2024-10-11 14:27:27,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6950 conditions, 3150 events. 2206/3150 cut-off events. For 695/695 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13261 event pairs, 983 based on Foata normal form. 1/2794 useless extension candidates. Maximal degree in co-relation 6940. Up to 1767 conditions per place. [2024-10-11 14:27:27,141 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 47 selfloop transitions, 2 changer transitions 19/69 dead transitions. [2024-10-11 14:27:27,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 69 transitions, 336 flow [2024-10-11 14:27:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:27:27,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:27:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-10-11 14:27:27,143 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2024-10-11 14:27:27,143 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 102 flow. Second operand 4 states and 79 transitions. [2024-10-11 14:27:27,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 69 transitions, 336 flow [2024-10-11 14:27:27,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 69 transitions, 328 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-11 14:27:27,144 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 112 flow [2024-10-11 14:27:27,145 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2024-10-11 14:27:27,145 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 9 predicate places. [2024-10-11 14:27:27,145 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 112 flow [2024-10-11 14:27:27,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:27,146 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:27,146 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-10-11 14:27:27,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:27:27,146 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:27:27,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:27,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1098083635, now seen corresponding path program 1 times [2024-10-11 14:27:27,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:27,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095839189] [2024-10-11 14:27:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:27,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:28,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:28,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095839189] [2024-10-11 14:27:28,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095839189] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:28,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572104927] [2024-10-11 14:27:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:28,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:28,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:28,008 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:28,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:27:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:28,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-11 14:27:28,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:28,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 157 treesize of output 101 [2024-10-11 14:27:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:29,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:30,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:27:30,550 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 195 treesize of output 103 [2024-10-11 14:27:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:30,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572104927] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:30,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:30,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-10-11 14:27:30,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984320382] [2024-10-11 14:27:30,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:30,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-11 14:27:30,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:30,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-11 14:27:30,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-10-11 14:27:30,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-10-11 14:27:30,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 112 flow. Second operand has 28 states, 28 states have (on average 6.964285714285714) internal successors, (195), 28 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:30,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:30,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-10-11 14:27:30,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:40,785 INFO L124 PetriNetUnfolderBase]: 11433/16459 cut-off events. [2024-10-11 14:27:40,786 INFO L125 PetriNetUnfolderBase]: For 3521/3521 co-relation queries the response was YES. [2024-10-11 14:27:40,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38066 conditions, 16459 events. 11433/16459 cut-off events. For 3521/3521 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 92566 event pairs, 622 based on Foata normal form. 11/15534 useless extension candidates. Maximal degree in co-relation 38055. Up to 1987 conditions per place. [2024-10-11 14:27:40,880 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 542 selfloop transitions, 141 changer transitions 98/782 dead transitions. [2024-10-11 14:27:40,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 782 transitions, 3600 flow [2024-10-11 14:27:40,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-10-11 14:27:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-10-11 14:27:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 1037 transitions. [2024-10-11 14:27:40,888 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4500868055555556 [2024-10-11 14:27:40,888 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 112 flow. Second operand 64 states and 1037 transitions. [2024-10-11 14:27:40,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 782 transitions, 3600 flow [2024-10-11 14:27:40,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 782 transitions, 3545 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-10-11 14:27:40,902 INFO L231 Difference]: Finished difference. Result has 145 places, 180 transitions, 1220 flow [2024-10-11 14:27:40,902 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=1220, PETRI_PLACES=145, PETRI_TRANSITIONS=180} [2024-10-11 14:27:40,903 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 110 predicate places. [2024-10-11 14:27:40,903 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 180 transitions, 1220 flow [2024-10-11 14:27:40,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.964285714285714) internal successors, (195), 28 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:40,903 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:40,904 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-10-11 14:27:40,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:41,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:41,109 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:27:41,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:41,110 INFO L85 PathProgramCache]: Analyzing trace with hash 322423495, now seen corresponding path program 2 times [2024-10-11 14:27:41,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:41,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427315420] [2024-10-11 14:27:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:41,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:42,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:42,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427315420] [2024-10-11 14:27:42,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427315420] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:42,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776454370] [2024-10-11 14:27:42,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:27:42,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:42,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:42,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:42,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:27:42,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:27:42,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:42,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-11 14:27:42,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:43,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 85 treesize of output 53 [2024-10-11 14:27:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:43,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:43,807 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:27:43,807 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 135 treesize of output 70 [2024-10-11 14:27:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:43,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776454370] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:43,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:43,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 30 [2024-10-11 14:27:43,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683481165] [2024-10-11 14:27:43,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:43,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-11 14:27:43,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:43,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-11 14:27:43,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2024-10-11 14:27:43,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-10-11 14:27:43,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 180 transitions, 1220 flow. Second operand has 30 states, 30 states have (on average 6.666666666666667) internal successors, (200), 30 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:43,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:43,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-10-11 14:27:43,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:27:53,651 INFO L124 PetriNetUnfolderBase]: 19717/28872 cut-off events. [2024-10-11 14:27:53,652 INFO L125 PetriNetUnfolderBase]: For 523459/523459 co-relation queries the response was YES. [2024-10-11 14:27:53,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135948 conditions, 28872 events. 19717/28872 cut-off events. For 523459/523459 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 181275 event pairs, 4089 based on Foata normal form. 12/28884 useless extension candidates. Maximal degree in co-relation 135897. Up to 7550 conditions per place. [2024-10-11 14:27:54,098 INFO L140 encePairwiseOnDemand]: 22/36 looper letters, 384 selfloop transitions, 357 changer transitions 124/866 dead transitions. [2024-10-11 14:27:54,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 866 transitions, 7617 flow [2024-10-11 14:27:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-10-11 14:27:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-10-11 14:27:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 640 transitions. [2024-10-11 14:27:54,104 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36281179138321995 [2024-10-11 14:27:54,104 INFO L175 Difference]: Start difference. First operand has 145 places, 180 transitions, 1220 flow. Second operand 49 states and 640 transitions. [2024-10-11 14:27:54,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 866 transitions, 7617 flow [2024-10-11 14:27:56,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 866 transitions, 6750 flow, removed 380 selfloop flow, removed 12 redundant places. [2024-10-11 14:27:56,149 INFO L231 Difference]: Finished difference. Result has 213 places, 457 transitions, 4619 flow [2024-10-11 14:27:56,149 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=4619, PETRI_PLACES=213, PETRI_TRANSITIONS=457} [2024-10-11 14:27:56,150 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 178 predicate places. [2024-10-11 14:27:56,150 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 457 transitions, 4619 flow [2024-10-11 14:27:56,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.666666666666667) internal successors, (200), 30 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:56,150 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:27:56,150 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-10-11 14:27:56,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 14:27:56,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:56,352 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:27:56,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:27:56,353 INFO L85 PathProgramCache]: Analyzing trace with hash 392215285, now seen corresponding path program 3 times [2024-10-11 14:27:56,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:27:56,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801153727] [2024-10-11 14:27:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:27:56,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:27:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:27:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:56,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:27:56,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801153727] [2024-10-11 14:27:56,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801153727] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:27:56,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050977134] [2024-10-11 14:27:56,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:27:56,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:27:56,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:27:56,979 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:27:56,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:27:57,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:27:57,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:27:57,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-11 14:27:57,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:27:57,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 112 treesize of output 72 [2024-10-11 14:27:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:57,811 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:27:58,309 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:27:58,310 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 166 treesize of output 94 [2024-10-11 14:27:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:27:58,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050977134] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:27:58,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:27:58,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11] total 28 [2024-10-11 14:27:58,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430425296] [2024-10-11 14:27:58,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:27:58,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-11 14:27:58,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:27:58,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-11 14:27:58,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2024-10-11 14:27:58,660 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-10-11 14:27:58,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 457 transitions, 4619 flow. Second operand has 28 states, 28 states have (on average 6.964285714285714) internal successors, (195), 28 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:27:58,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:27:58,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-10-11 14:27:58,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:07,915 INFO L124 PetriNetUnfolderBase]: 23960/34893 cut-off events. [2024-10-11 14:28:07,915 INFO L125 PetriNetUnfolderBase]: For 1002138/1002138 co-relation queries the response was YES. [2024-10-11 14:28:08,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226447 conditions, 34893 events. 23960/34893 cut-off events. For 1002138/1002138 co-relation queries the response was YES. Maximal size of possible extension queue 1184. Compared 222277 event pairs, 7411 based on Foata normal form. 4/34897 useless extension candidates. Maximal degree in co-relation 226365. Up to 13980 conditions per place. [2024-10-11 14:28:08,537 INFO L140 encePairwiseOnDemand]: 22/36 looper letters, 594 selfloop transitions, 306 changer transitions 43/944 dead transitions. [2024-10-11 14:28:08,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 944 transitions, 13271 flow [2024-10-11 14:28:08,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-11 14:28:08,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-10-11 14:28:08,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 502 transitions. [2024-10-11 14:28:08,541 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3984126984126984 [2024-10-11 14:28:08,541 INFO L175 Difference]: Start difference. First operand has 213 places, 457 transitions, 4619 flow. Second operand 35 states and 502 transitions. [2024-10-11 14:28:08,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 944 transitions, 13271 flow [2024-10-11 14:28:18,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 944 transitions, 10982 flow, removed 1115 selfloop flow, removed 16 redundant places. [2024-10-11 14:28:18,079 INFO L231 Difference]: Finished difference. Result has 233 places, 583 transitions, 6145 flow [2024-10-11 14:28:18,080 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=3819, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6145, PETRI_PLACES=233, PETRI_TRANSITIONS=583} [2024-10-11 14:28:18,080 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 198 predicate places. [2024-10-11 14:28:18,080 INFO L471 AbstractCegarLoop]: Abstraction has has 233 places, 583 transitions, 6145 flow [2024-10-11 14:28:18,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.964285714285714) internal successors, (195), 28 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:18,081 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:18,081 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-10-11 14:28:18,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:28:18,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 14:28:18,284 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:28:18,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash 509241191, now seen corresponding path program 4 times [2024-10-11 14:28:18,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:18,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925123689] [2024-10-11 14:28:18,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:18,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:18,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:18,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925123689] [2024-10-11 14:28:18,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925123689] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:18,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548614347] [2024-10-11 14:28:18,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:28:18,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:18,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:18,959 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:18,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:28:19,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:28:19,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:19,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:28:19,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:19,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 112 treesize of output 72 [2024-10-11 14:28:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:19,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:20,287 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:28:20,288 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 135 treesize of output 70 [2024-10-11 14:28:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:20,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548614347] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:20,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:20,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2024-10-11 14:28:20,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972922702] [2024-10-11 14:28:20,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:20,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:28:20,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:20,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:28:20,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:28:20,367 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-10-11 14:28:20,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 583 transitions, 6145 flow. Second operand has 24 states, 24 states have (on average 7.333333333333333) internal successors, (176), 24 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:20,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:20,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-10-11 14:28:20,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:36,603 INFO L124 PetriNetUnfolderBase]: 35125/51144 cut-off events. [2024-10-11 14:28:36,604 INFO L125 PetriNetUnfolderBase]: For 1676244/1676244 co-relation queries the response was YES. [2024-10-11 14:28:37,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345151 conditions, 51144 events. 35125/51144 cut-off events. For 1676244/1676244 co-relation queries the response was YES. Maximal size of possible extension queue 1739. Compared 343754 event pairs, 5327 based on Foata normal form. 15/51159 useless extension candidates. Maximal degree in co-relation 345068. Up to 9373 conditions per place. [2024-10-11 14:28:37,661 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 805 selfloop transitions, 518 changer transitions 77/1401 dead transitions. [2024-10-11 14:28:37,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1401 transitions, 18523 flow [2024-10-11 14:28:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-11 14:28:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-10-11 14:28:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 699 transitions. [2024-10-11 14:28:37,663 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4045138888888889 [2024-10-11 14:28:37,663 INFO L175 Difference]: Start difference. First operand has 233 places, 583 transitions, 6145 flow. Second operand 48 states and 699 transitions. [2024-10-11 14:28:37,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1401 transitions, 18523 flow [2024-10-11 14:28:47,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1401 transitions, 17500 flow, removed 510 selfloop flow, removed 2 redundant places. [2024-10-11 14:28:47,291 INFO L231 Difference]: Finished difference. Result has 302 places, 817 transitions, 10804 flow [2024-10-11 14:28:47,292 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=5766, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=10804, PETRI_PLACES=302, PETRI_TRANSITIONS=817} [2024-10-11 14:28:47,292 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 267 predicate places. [2024-10-11 14:28:47,292 INFO L471 AbstractCegarLoop]: Abstraction has has 302 places, 817 transitions, 10804 flow [2024-10-11 14:28:47,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.333333333333333) internal successors, (176), 24 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:47,293 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:47,293 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-10-11 14:28:47,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:47,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:47,494 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:28:47,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:47,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1003652085, now seen corresponding path program 5 times [2024-10-11 14:28:47,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:47,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960456403] [2024-10-11 14:28:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:47,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:48,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:48,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960456403] [2024-10-11 14:28:48,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960456403] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:48,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379157830] [2024-10-11 14:28:48,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:28:48,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:48,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:48,166 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:48,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:28:48,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-11 14:28:48,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:48,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 14:28:48,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:48,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 201 treesize of output 129 [2024-10-11 14:28:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:48,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:49,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:28:49,492 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 196 treesize of output 108 [2024-10-11 14:28:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:28:49,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379157830] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:49,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:49,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2024-10-11 14:28:49,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465460500] [2024-10-11 14:28:49,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:49,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:28:49,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:49,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:28:49,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:28:49,708 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-10-11 14:28:49,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 817 transitions, 10804 flow. Second operand has 24 states, 24 states have (on average 7.25) internal successors, (174), 24 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:28:49,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:49,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-10-11 14:28:49,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand