./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/popl20-prod-cons.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/popl20-prod-cons.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 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:35:00,585 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:35:00,644 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:35:00,649 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:35:00,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:35:00,676 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:35:00,678 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:35:00,679 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:35:00,679 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:35:00,680 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:35:00,680 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:35:00,680 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:35:00,681 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:35:00,683 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:35:00,683 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:35:00,683 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:35:00,684 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:35:00,684 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:35:00,684 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:35:00,684 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:35:00,685 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:35:00,685 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:35:00,688 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:35:00,688 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:35:00,688 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:35:00,689 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:35:00,689 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:35:00,689 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:35:00,689 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:35:00,690 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:35:00,690 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:35:00,690 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:35:00,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:35:00,690 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:35:00,691 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:35:00,691 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:35:00,691 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:35:00,691 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:35:00,691 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:35:00,692 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:35:00,692 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:35:00,693 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:35:00,693 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 [2024-10-11 14:35:00,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:35:00,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:35:00,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:35:00,930 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:35:00,931 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:35:00,932 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2024-10-11 14:35:02,297 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:35:02,479 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:35:02,480 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2024-10-11 14:35:02,489 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/fad2469a3/fcdbfc4c145d40548cd2e76b92933001/FLAG174f165d3 [2024-10-11 14:35:02,505 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/fad2469a3/fcdbfc4c145d40548cd2e76b92933001 [2024-10-11 14:35:02,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:35:02,510 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:35:02,513 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:35:02,513 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:35:02,518 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:35:02,519 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:35:02" (1/1) ... [2024-10-11 14:35:02,520 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60dabbdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:02, skipping insertion in model container [2024-10-11 14:35:02,520 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:35:02" (1/1) ... [2024-10-11 14:35:02,541 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:35:02,712 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/popl20-prod-cons.wvr.c[3095,3108] [2024-10-11 14:35:02,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:35:02,733 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:35:02,779 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/popl20-prod-cons.wvr.c[3095,3108] [2024-10-11 14:35:02,787 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:35:02,813 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:35:02,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:02 WrapperNode [2024-10-11 14:35:02,814 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:35:02,814 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:35:02,815 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:35:02,815 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:35:02,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:02" (1/1) ... [2024-10-11 14:35:02,841 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:02" (1/1) ... [2024-10-11 14:35:02,866 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 156 [2024-10-11 14:35:02,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:35:02,867 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:35:02,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:35:02,867 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:35:02,876 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:02" (1/1) ... [2024-10-11 14:35:02,876 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:02" (1/1) ... [2024-10-11 14:35:02,879 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:02" (1/1) ... [2024-10-11 14:35:02,898 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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 14:35:02,899 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:02" (1/1) ... [2024-10-11 14:35:02,899 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:02" (1/1) ... [2024-10-11 14:35:02,903 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:02" (1/1) ... [2024-10-11 14:35:02,906 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:02" (1/1) ... [2024-10-11 14:35:02,907 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:02" (1/1) ... [2024-10-11 14:35:02,908 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:02" (1/1) ... [2024-10-11 14:35:02,910 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:35:02,911 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:35:02,911 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:35:02,911 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:35:02,912 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:02" (1/1) ... [2024-10-11 14:35:02,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:35:02,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:02,945 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 14:35:02,947 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 14:35:02,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:35:02,988 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:35:02,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:35:02,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:35:02,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:35:02,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 14:35:02,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 14:35:02,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:35:02,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:35:02,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:35:02,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:35:02,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:35:02,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:35:02,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:35:02,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:35:02,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:35:02,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:35:02,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:35:02,992 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 14:35:03,076 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:35:03,078 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:35:03,259 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:35:03,260 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:35:03,411 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:35:03,411 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 14:35:03,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:35:03 BoogieIcfgContainer [2024-10-11 14:35:03,413 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:35:03,414 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:35:03,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:35:03,419 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:35:03,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:35:02" (1/3) ... [2024-10-11 14:35:03,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749953cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:35:03, skipping insertion in model container [2024-10-11 14:35:03,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:02" (2/3) ... [2024-10-11 14:35:03,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749953cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:35:03, skipping insertion in model container [2024-10-11 14:35:03,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:35:03" (3/3) ... [2024-10-11 14:35:03,422 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2024-10-11 14:35:03,437 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:35:03,437 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:35:03,437 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:35:03,501 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-11 14:35:03,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 37 transitions, 95 flow [2024-10-11 14:35:03,557 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2024-10-11 14:35:03,557 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:35:03,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 34 events. 4/34 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-10-11 14:35:03,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 37 transitions, 95 flow [2024-10-11 14:35:03,563 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 33 transitions, 84 flow [2024-10-11 14:35:03,576 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:35:03,585 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;@6a2c2e0f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:35:03,586 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-11 14:35:03,609 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:35:03,609 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-10-11 14:35:03,609 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:35:03,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:03,610 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 14:35:03,611 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 14:35:03,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:03,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1998691310, now seen corresponding path program 1 times [2024-10-11 14:35:03,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:03,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794525658] [2024-10-11 14:35:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:03,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:04,191 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 14:35:04,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:04,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794525658] [2024-10-11 14:35:04,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794525658] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:04,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:04,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:35:04,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553408142] [2024-10-11 14:35:04,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:04,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:35:04,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:04,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:35:04,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:35:04,240 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-10-11 14:35:04,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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 14:35:04,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:04,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-10-11 14:35:04,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:04,535 INFO L124 PetriNetUnfolderBase]: 778/1290 cut-off events. [2024-10-11 14:35:04,535 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-10-11 14:35:04,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2582 conditions, 1290 events. 778/1290 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6682 event pairs, 296 based on Foata normal form. 2/1249 useless extension candidates. Maximal degree in co-relation 2346. Up to 517 conditions per place. [2024-10-11 14:35:04,549 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 46 selfloop transitions, 4 changer transitions 3/62 dead transitions. [2024-10-11 14:35:04,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 62 transitions, 269 flow [2024-10-11 14:35:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:35:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:35:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-10-11 14:35:04,560 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-10-11 14:35:04,561 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 84 flow. Second operand 5 states and 115 transitions. [2024-10-11 14:35:04,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 62 transitions, 269 flow [2024-10-11 14:35:04,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 62 transitions, 243 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 14:35:04,568 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 96 flow [2024-10-11 14:35:04,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-10-11 14:35:04,574 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2024-10-11 14:35:04,574 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 96 flow [2024-10-11 14:35:04,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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 14:35:04,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:04,575 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 14:35:04,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:35:04,575 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 14:35:04,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:04,576 INFO L85 PathProgramCache]: Analyzing trace with hash 832852343, now seen corresponding path program 1 times [2024-10-11 14:35:04,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:04,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550479698] [2024-10-11 14:35:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:04,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:04,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:04,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550479698] [2024-10-11 14:35:04,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550479698] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:04,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:04,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:35:04,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054714609] [2024-10-11 14:35:04,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:04,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:35:04,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:04,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:35:04,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:35:04,696 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-11 14:35:04,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 14:35:04,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:04,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-11 14:35:04,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:04,846 INFO L124 PetriNetUnfolderBase]: 566/1077 cut-off events. [2024-10-11 14:35:04,846 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-10-11 14:35:04,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2077 conditions, 1077 events. 566/1077 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5616 event pairs, 231 based on Foata normal form. 18/1034 useless extension candidates. Maximal degree in co-relation 1223. Up to 614 conditions per place. [2024-10-11 14:35:04,853 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 27 selfloop transitions, 2 changer transitions 7/49 dead transitions. [2024-10-11 14:35:04,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 201 flow [2024-10-11 14:35:04,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:35:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:35:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-10-11 14:35:04,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7117117117117117 [2024-10-11 14:35:04,856 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 96 flow. Second operand 3 states and 79 transitions. [2024-10-11 14:35:04,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 201 flow [2024-10-11 14:35:04,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 197 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:35:04,859 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 104 flow [2024-10-11 14:35:04,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-10-11 14:35:04,860 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2024-10-11 14:35:04,860 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 104 flow [2024-10-11 14:35:04,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 14:35:04,860 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:04,861 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, 1, 1, 1, 1, 1] [2024-10-11 14:35:04,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:35:04,861 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 14:35:04,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:04,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1617767189, now seen corresponding path program 1 times [2024-10-11 14:35:04,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:04,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444724365] [2024-10-11 14:35:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:04,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:04,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:04,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444724365] [2024-10-11 14:35:04,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444724365] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:04,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:04,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:35:04,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870971236] [2024-10-11 14:35:04,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:04,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:35:04,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:04,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:35:04,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:35:04,965 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-11 14:35:04,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:04,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:04,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-11 14:35:04,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:05,118 INFO L124 PetriNetUnfolderBase]: 679/1306 cut-off events. [2024-10-11 14:35:05,119 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-10-11 14:35:05,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2604 conditions, 1306 events. 679/1306 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7777 event pairs, 580 based on Foata normal form. 15/1162 useless extension candidates. Maximal degree in co-relation 1526. Up to 823 conditions per place. [2024-10-11 14:35:05,124 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 2 changer transitions 16/53 dead transitions. [2024-10-11 14:35:05,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 226 flow [2024-10-11 14:35:05,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:35:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:35:05,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-10-11 14:35:05,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-10-11 14:35:05,126 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 104 flow. Second operand 4 states and 96 transitions. [2024-10-11 14:35:05,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 226 flow [2024-10-11 14:35:05,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 53 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:35:05,128 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 116 flow [2024-10-11 14:35:05,128 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-10-11 14:35:05,129 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2024-10-11 14:35:05,129 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 116 flow [2024-10-11 14:35:05,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:05,130 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:05,130 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, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:05,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:35:05,130 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 14:35:05,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:05,131 INFO L85 PathProgramCache]: Analyzing trace with hash -450042783, now seen corresponding path program 1 times [2024-10-11 14:35:05,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:05,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58456374] [2024-10-11 14:35:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:05,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:05,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:05,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58456374] [2024-10-11 14:35:05,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58456374] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:05,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863038337] [2024-10-11 14:35:05,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:05,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:05,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:05,263 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 14:35:05,264 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 14:35:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:05,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 14:35:05,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:05,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:05,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863038337] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:05,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:05,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 9 [2024-10-11 14:35:05,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153102790] [2024-10-11 14:35:05,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:05,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:35:05,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:05,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:35:05,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:35:05,518 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-11 14:35:05,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 116 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 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 14:35:05,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:05,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-11 14:35:05,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:05,862 INFO L124 PetriNetUnfolderBase]: 1618/2611 cut-off events. [2024-10-11 14:35:05,862 INFO L125 PetriNetUnfolderBase]: For 526/526 co-relation queries the response was YES. [2024-10-11 14:35:05,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5792 conditions, 2611 events. 1618/2611 cut-off events. For 526/526 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 12405 event pairs, 89 based on Foata normal form. 0/2499 useless extension candidates. Maximal degree in co-relation 5776. Up to 486 conditions per place. [2024-10-11 14:35:05,873 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 76 selfloop transitions, 9 changer transitions 8/101 dead transitions. [2024-10-11 14:35:05,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 101 transitions, 477 flow [2024-10-11 14:35:05,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:35:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:35:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-10-11 14:35:05,875 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2024-10-11 14:35:05,875 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 116 flow. Second operand 8 states and 168 transitions. [2024-10-11 14:35:05,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 101 transitions, 477 flow [2024-10-11 14:35:05,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 101 transitions, 461 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-10-11 14:35:05,879 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 164 flow [2024-10-11 14:35:05,879 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=164, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2024-10-11 14:35:05,880 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 14 predicate places. [2024-10-11 14:35:05,880 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 164 flow [2024-10-11 14:35:05,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 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 14:35:05,880 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:05,880 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, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:05,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:35:06,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:06,085 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 14:35:06,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:06,086 INFO L85 PathProgramCache]: Analyzing trace with hash -701652849, now seen corresponding path program 2 times [2024-10-11 14:35:06,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:06,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520660694] [2024-10-11 14:35:06,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:06,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:06,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:06,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520660694] [2024-10-11 14:35:06,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520660694] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:06,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254037755] [2024-10-11 14:35:06,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:35:06,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:06,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:06,686 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 14:35:06,687 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 14:35:06,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:35:06,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:06,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-11 14:35:06,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:06,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-11 14:35:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:07,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:08,132 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 40 treesize of output 36 [2024-10-11 14:35:08,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:35:08,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 46 [2024-10-11 14:35:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:08,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254037755] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:08,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:08,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 31 [2024-10-11 14:35:08,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121533297] [2024-10-11 14:35:08,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:08,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-11 14:35:08,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:08,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-11 14:35:08,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-10-11 14:35:08,723 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-10-11 14:35:08,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 164 flow. Second operand has 32 states, 32 states have (on average 10.5625) internal successors, (338), 32 states have internal predecessors, (338), 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 14:35:08,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:08,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-10-11 14:35:08,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:10,819 INFO L124 PetriNetUnfolderBase]: 5468/9059 cut-off events. [2024-10-11 14:35:10,819 INFO L125 PetriNetUnfolderBase]: For 6798/6983 co-relation queries the response was YES. [2024-10-11 14:35:10,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23311 conditions, 9059 events. 5468/9059 cut-off events. For 6798/6983 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 59361 event pairs, 717 based on Foata normal form. 189/8570 useless extension candidates. Maximal degree in co-relation 16017. Up to 2279 conditions per place. [2024-10-11 14:35:10,852 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 154 selfloop transitions, 56 changer transitions 86/303 dead transitions. [2024-10-11 14:35:10,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 303 transitions, 1677 flow [2024-10-11 14:35:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-11 14:35:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-11 14:35:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 497 transitions. [2024-10-11 14:35:10,855 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4974974974974975 [2024-10-11 14:35:10,855 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 164 flow. Second operand 27 states and 497 transitions. [2024-10-11 14:35:10,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 303 transitions, 1677 flow [2024-10-11 14:35:10,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 303 transitions, 1657 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-10-11 14:35:10,892 INFO L231 Difference]: Finished difference. Result has 95 places, 94 transitions, 601 flow [2024-10-11 14:35:10,893 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=601, PETRI_PLACES=95, PETRI_TRANSITIONS=94} [2024-10-11 14:35:10,893 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 56 predicate places. [2024-10-11 14:35:10,894 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 94 transitions, 601 flow [2024-10-11 14:35:10,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 10.5625) internal successors, (338), 32 states have internal predecessors, (338), 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 14:35:10,894 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:10,894 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:10,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:35:11,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:11,097 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 14:35:11,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:11,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1869356829, now seen corresponding path program 3 times [2024-10-11 14:35:11,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:11,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520980282] [2024-10-11 14:35:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:11,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:12,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:12,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520980282] [2024-10-11 14:35:12,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520980282] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:12,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034090497] [2024-10-11 14:35:12,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:35:12,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:12,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:12,021 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 14:35:12,022 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 14:35:12,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:35:12,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:12,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-11 14:35:12,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:12,375 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:12,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:35:12,453 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 28 treesize of output 20 [2024-10-11 14:35:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:35:12,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034090497] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:12,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:12,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2024-10-11 14:35:12,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114687356] [2024-10-11 14:35:12,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:12,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-11 14:35:12,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-11 14:35:12,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-10-11 14:35:12,754 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-10-11 14:35:12,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 94 transitions, 601 flow. Second operand has 30 states, 30 states have (on average 10.8) internal successors, (324), 30 states have internal predecessors, (324), 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 14:35:12,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:12,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-10-11 14:35:12,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:14,710 INFO L124 PetriNetUnfolderBase]: 2877/4873 cut-off events. [2024-10-11 14:35:14,711 INFO L125 PetriNetUnfolderBase]: For 14272/14526 co-relation queries the response was YES. [2024-10-11 14:35:14,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17732 conditions, 4873 events. 2877/4873 cut-off events. For 14272/14526 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 28380 event pairs, 165 based on Foata normal form. 272/5095 useless extension candidates. Maximal degree in co-relation 16143. Up to 868 conditions per place. [2024-10-11 14:35:14,739 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 219 selfloop transitions, 106 changer transitions 56/388 dead transitions. [2024-10-11 14:35:14,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 388 transitions, 2781 flow [2024-10-11 14:35:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-11 14:35:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-10-11 14:35:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 591 transitions. [2024-10-11 14:35:14,742 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4436936936936937 [2024-10-11 14:35:14,742 INFO L175 Difference]: Start difference. First operand has 95 places, 94 transitions, 601 flow. Second operand 36 states and 591 transitions. [2024-10-11 14:35:14,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 388 transitions, 2781 flow [2024-10-11 14:35:14,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 388 transitions, 2633 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-10-11 14:35:14,789 INFO L231 Difference]: Finished difference. Result has 139 places, 152 transitions, 1281 flow [2024-10-11 14:35:14,792 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1281, PETRI_PLACES=139, PETRI_TRANSITIONS=152} [2024-10-11 14:35:14,792 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 100 predicate places. [2024-10-11 14:35:14,792 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 152 transitions, 1281 flow [2024-10-11 14:35:14,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 10.8) internal successors, (324), 30 states have internal predecessors, (324), 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 14:35:14,793 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:14,793 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1] [2024-10-11 14:35:14,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:35:14,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:14,994 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 14:35:14,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:14,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1011252776, now seen corresponding path program 4 times [2024-10-11 14:35:14,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:14,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438225792] [2024-10-11 14:35:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:14,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:15,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:15,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438225792] [2024-10-11 14:35:15,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438225792] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:15,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543788075] [2024-10-11 14:35:15,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:35:15,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:15,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:15,049 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 14:35:15,050 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 14:35:15,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:35:15,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:15,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 14:35:15,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:15,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:15,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543788075] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:15,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:15,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2024-10-11 14:35:15,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718203065] [2024-10-11 14:35:15,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:15,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:35:15,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:15,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:35:15,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:35:15,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-11 14:35:15,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 152 transitions, 1281 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 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 14:35:15,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:15,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-11 14:35:15,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:15,871 INFO L124 PetriNetUnfolderBase]: 2641/5321 cut-off events. [2024-10-11 14:35:15,872 INFO L125 PetriNetUnfolderBase]: For 42282/42642 co-relation queries the response was YES. [2024-10-11 14:35:15,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23737 conditions, 5321 events. 2641/5321 cut-off events. For 42282/42642 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 37495 event pairs, 558 based on Foata normal form. 293/5403 useless extension candidates. Maximal degree in co-relation 22511. Up to 1469 conditions per place. [2024-10-11 14:35:15,937 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 134 selfloop transitions, 20 changer transitions 20/246 dead transitions. [2024-10-11 14:35:15,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 246 transitions, 2391 flow [2024-10-11 14:35:15,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:35:15,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:35:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-10-11 14:35:15,946 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7567567567567568 [2024-10-11 14:35:15,946 INFO L175 Difference]: Start difference. First operand has 139 places, 152 transitions, 1281 flow. Second operand 4 states and 112 transitions. [2024-10-11 14:35:15,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 246 transitions, 2391 flow [2024-10-11 14:35:16,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 246 transitions, 2091 flow, removed 92 selfloop flow, removed 8 redundant places. [2024-10-11 14:35:16,465 INFO L231 Difference]: Finished difference. Result has 136 places, 168 transitions, 1324 flow [2024-10-11 14:35:16,465 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1324, PETRI_PLACES=136, PETRI_TRANSITIONS=168} [2024-10-11 14:35:16,466 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 97 predicate places. [2024-10-11 14:35:16,466 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 168 transitions, 1324 flow [2024-10-11 14:35:16,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 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 14:35:16,466 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:16,466 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:16,481 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 14:35:16,670 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,SelfDestructingSolverStorable6 [2024-10-11 14:35:16,671 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 14:35:16,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:16,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2026861978, now seen corresponding path program 5 times [2024-10-11 14:35:16,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:16,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620932113] [2024-10-11 14:35:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:16,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:35:16,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:16,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620932113] [2024-10-11 14:35:16,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620932113] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:16,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463611987] [2024-10-11 14:35:16,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:35:16,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:16,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:16,832 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 14:35:16,834 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 14:35:16,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-11 14:35:16,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:16,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 14:35:16,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:35:16,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:35:17,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463611987] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:17,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:17,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-11 14:35:17,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331545372] [2024-10-11 14:35:17,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:17,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 14:35:17,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:17,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 14:35:17,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-11 14:35:17,002 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-11 14:35:17,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 168 transitions, 1324 flow. Second operand has 12 states, 12 states have (on average 17.083333333333332) internal successors, (205), 12 states have internal predecessors, (205), 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 14:35:17,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:17,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-11 14:35:17,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:17,405 INFO L124 PetriNetUnfolderBase]: 2106/4367 cut-off events. [2024-10-11 14:35:17,405 INFO L125 PetriNetUnfolderBase]: For 31106/31506 co-relation queries the response was YES. [2024-10-11 14:35:17,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19101 conditions, 4367 events. 2106/4367 cut-off events. For 31106/31506 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 29660 event pairs, 1223 based on Foata normal form. 169/4329 useless extension candidates. Maximal degree in co-relation 18090. Up to 2797 conditions per place. [2024-10-11 14:35:17,436 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 66 selfloop transitions, 3 changer transitions 39/160 dead transitions. [2024-10-11 14:35:17,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 160 transitions, 1383 flow [2024-10-11 14:35:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:35:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:35:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-10-11 14:35:17,437 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5855855855855856 [2024-10-11 14:35:17,437 INFO L175 Difference]: Start difference. First operand has 136 places, 168 transitions, 1324 flow. Second operand 6 states and 130 transitions. [2024-10-11 14:35:17,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 160 transitions, 1383 flow [2024-10-11 14:35:17,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 160 transitions, 1351 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-10-11 14:35:17,563 INFO L231 Difference]: Finished difference. Result has 137 places, 121 transitions, 924 flow [2024-10-11 14:35:17,563 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=924, PETRI_PLACES=137, PETRI_TRANSITIONS=121} [2024-10-11 14:35:17,564 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 98 predicate places. [2024-10-11 14:35:17,564 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 121 transitions, 924 flow [2024-10-11 14:35:17,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.083333333333332) internal successors, (205), 12 states have internal predecessors, (205), 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 14:35:17,564 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:17,564 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 14:35:17,578 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 14:35:17,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:17,765 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 14:35:17,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:17,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1765952700, now seen corresponding path program 6 times [2024-10-11 14:35:17,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:17,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064483302] [2024-10-11 14:35:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:17,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:18,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:18,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064483302] [2024-10-11 14:35:18,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064483302] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:18,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479592750] [2024-10-11 14:35:18,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:35:18,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:18,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:18,686 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 14:35:18,688 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 14:35:18,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-11 14:35:18,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:18,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-11 14:35:18,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:18,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-11 14:35:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:19,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:20,185 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 77 treesize of output 69 [2024-10-11 14:35:20,204 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:35:20,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 139 [2024-10-11 14:35:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:20,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479592750] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:20,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:20,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2024-10-11 14:35:20,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71352314] [2024-10-11 14:35:20,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:20,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-11 14:35:20,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:20,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-11 14:35:20,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2024-10-11 14:35:20,940 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-10-11 14:35:20,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 121 transitions, 924 flow. Second operand has 43 states, 43 states have (on average 13.162790697674419) internal successors, (566), 43 states have internal predecessors, (566), 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 14:35:20,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:20,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-10-11 14:35:20,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:27,992 INFO L124 PetriNetUnfolderBase]: 9412/16637 cut-off events. [2024-10-11 14:35:27,992 INFO L125 PetriNetUnfolderBase]: For 76990/77454 co-relation queries the response was YES. [2024-10-11 14:35:28,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69890 conditions, 16637 events. 9412/16637 cut-off events. For 76990/77454 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 123346 event pairs, 1334 based on Foata normal form. 368/16619 useless extension candidates. Maximal degree in co-relation 69833. Up to 3665 conditions per place. [2024-10-11 14:35:28,260 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 448 selfloop transitions, 234 changer transitions 169/870 dead transitions. [2024-10-11 14:35:28,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 870 transitions, 7332 flow [2024-10-11 14:35:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-10-11 14:35:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2024-10-11 14:35:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 1475 transitions. [2024-10-11 14:35:28,264 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.511088011088011 [2024-10-11 14:35:28,264 INFO L175 Difference]: Start difference. First operand has 137 places, 121 transitions, 924 flow. Second operand 78 states and 1475 transitions. [2024-10-11 14:35:28,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 870 transitions, 7332 flow [2024-10-11 14:35:28,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 870 transitions, 6751 flow, removed 200 selfloop flow, removed 13 redundant places. [2024-10-11 14:35:28,971 INFO L231 Difference]: Finished difference. Result has 221 places, 327 transitions, 3513 flow [2024-10-11 14:35:28,971 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=3513, PETRI_PLACES=221, PETRI_TRANSITIONS=327} [2024-10-11 14:35:28,971 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 182 predicate places. [2024-10-11 14:35:28,972 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 327 transitions, 3513 flow [2024-10-11 14:35:28,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 13.162790697674419) internal successors, (566), 43 states have internal predecessors, (566), 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 14:35:28,972 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:28,972 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 14:35:28,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 14:35:29,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-11 14:35:29,174 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 14:35:29,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:29,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2067970736, now seen corresponding path program 7 times [2024-10-11 14:35:29,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:29,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798650454] [2024-10-11 14:35:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:29,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:30,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:30,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798650454] [2024-10-11 14:35:30,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798650454] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:30,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482250998] [2024-10-11 14:35:30,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:35:30,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:30,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:30,055 INFO L229 MonitoredProcess]: Starting monitored process 8 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 14:35:30,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:35:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:30,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-11 14:35:30,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:30,606 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-10-11 14:35:30,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2024-10-11 14:35:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:30,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:31,144 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-10-11 14:35:31,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 45 [2024-10-11 14:35:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:31,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482250998] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:31,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:31,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2024-10-11 14:35:31,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169989533] [2024-10-11 14:35:31,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:31,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-11 14:35:31,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:31,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-11 14:35:31,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1577, Unknown=0, NotChecked=0, Total=1806 [2024-10-11 14:35:31,838 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-10-11 14:35:31,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 327 transitions, 3513 flow. Second operand has 43 states, 43 states have (on average 13.116279069767442) internal successors, (564), 43 states have internal predecessors, (564), 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 14:35:31,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:31,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-10-11 14:35:31,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:52,309 INFO L124 PetriNetUnfolderBase]: 30914/53711 cut-off events. [2024-10-11 14:35:52,309 INFO L125 PetriNetUnfolderBase]: For 758306/759727 co-relation queries the response was YES. [2024-10-11 14:35:52,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303603 conditions, 53711 events. 30914/53711 cut-off events. For 758306/759727 co-relation queries the response was YES. Maximal size of possible extension queue 1827. Compared 468251 event pairs, 3112 based on Foata normal form. 990/53732 useless extension candidates. Maximal degree in co-relation 291667. Up to 10322 conditions per place. [2024-10-11 14:35:52,989 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 915 selfloop transitions, 1059 changer transitions 532/2525 dead transitions. [2024-10-11 14:35:52,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 2525 transitions, 30450 flow [2024-10-11 14:35:52,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2024-10-11 14:35:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2024-10-11 14:35:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 3156 transitions. [2024-10-11 14:35:52,997 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5232963024374068 [2024-10-11 14:35:52,997 INFO L175 Difference]: Start difference. First operand has 221 places, 327 transitions, 3513 flow. Second operand 163 states and 3156 transitions. [2024-10-11 14:35:52,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 2525 transitions, 30450 flow [2024-10-11 14:36:07,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 2525 transitions, 28282 flow, removed 727 selfloop flow, removed 15 redundant places. [2024-10-11 14:36:07,040 INFO L231 Difference]: Finished difference. Result has 420 places, 1306 transitions, 19615 flow [2024-10-11 14:36:07,041 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=163, PETRI_FLOW=19615, PETRI_PLACES=420, PETRI_TRANSITIONS=1306} [2024-10-11 14:36:07,041 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 381 predicate places. [2024-10-11 14:36:07,041 INFO L471 AbstractCegarLoop]: Abstraction has has 420 places, 1306 transitions, 19615 flow [2024-10-11 14:36:07,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 13.116279069767442) internal successors, (564), 43 states have internal predecessors, (564), 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 14:36:07,042 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:36:07,042 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 14:36:07,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 14:36:07,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:07,242 INFO L396 AbstractCegarLoop]: === Iteration 11 === 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 14:36:07,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:36:07,243 INFO L85 PathProgramCache]: Analyzing trace with hash 238034150, now seen corresponding path program 8 times [2024-10-11 14:36:07,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:36:07,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27844342] [2024-10-11 14:36:07,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:36:07,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:36:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:07,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:36:07,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27844342] [2024-10-11 14:36:07,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27844342] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:36:07,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279915145] [2024-10-11 14:36:07,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:36:07,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:07,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:36:07,972 INFO L229 MonitoredProcess]: Starting monitored process 9 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 14:36:07,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:36:08,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:36:08,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:36:08,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-11 14:36:08,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:08,541 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-10-11 14:36:08,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2024-10-11 14:36:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:08,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:09,080 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-10-11 14:36:09,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 45 [2024-10-11 14:36:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:09,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279915145] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:09,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:09,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2024-10-11 14:36:09,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695040292] [2024-10-11 14:36:09,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:09,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-11 14:36:09,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:09,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-11 14:36:09,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2024-10-11 14:36:09,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-10-11 14:36:09,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 1306 transitions, 19615 flow. Second operand has 43 states, 43 states have (on average 13.069767441860465) internal successors, (562), 43 states have internal predecessors, (562), 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 14:36:09,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:09,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-10-11 14:36:09,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand