./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:08:20,977 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:08:21,042 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:08:21,047 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:08:21,047 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:08:21,071 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:08:21,071 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:08:21,072 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:08:21,072 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:08:21,073 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:08:21,074 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:08:21,074 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:08:21,075 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:08:21,075 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:08:21,076 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:08:21,077 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:08:21,077 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:08:21,078 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:08:21,078 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:08:21,079 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:08:21,079 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:08:21,080 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:08:21,080 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:08:21,081 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:08:21,081 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:08:21,082 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:08:21,082 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:08:21,083 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:08:21,083 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:08:21,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:08:21,084 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:08:21,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:08:21,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:08:21,085 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:08:21,085 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:08:21,085 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:08:21,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:08:21,085 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:08:21,086 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:08:21,086 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:08:21,086 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:08:21,086 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:08:21,086 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2023-11-29 02:08:21,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:08:21,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:08:21,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:08:21,347 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:08:21,348 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:08:21,349 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2023-11-29 02:08:24,120 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:08:24,295 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:08:24,296 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2023-11-29 02:08:24,305 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/data/bf56a5ad7/f0953c1808c8416a9e9dfa0b6939f533/FLAG8d2513e4f [2023-11-29 02:08:24,319 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/data/bf56a5ad7/f0953c1808c8416a9e9dfa0b6939f533 [2023-11-29 02:08:24,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:08:24,323 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:08:24,325 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:08:24,325 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:08:24,330 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:08:24,330 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:08:24" (1/1) ... [2023-11-29 02:08:24,331 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b3c8c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:08:24, skipping insertion in model container [2023-11-29 02:08:24,332 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:08:24" (1/1) ... [2023-11-29 02:08:24,361 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:08:24,565 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c[4955,4968] [2023-11-29 02:08:24,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:08:24,586 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:08:24,619 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c[4955,4968] [2023-11-29 02:08:24,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:08:24,638 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:08:24,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:08:24 WrapperNode [2023-11-29 02:08:24,638 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:08:24,639 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:08:24,639 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:08:24,639 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:08:24,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:08:24" (1/1) ... [2023-11-29 02:08:24,655 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:08:24" (1/1) ... [2023-11-29 02:08:24,695 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 409 [2023-11-29 02:08:24,695 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:08:24,696 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:08:24,696 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:08:24,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:08:24,708 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:08:24" (1/1) ... [2023-11-29 02:08:24,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:08:24" (1/1) ... [2023-11-29 02:08:24,712 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:08:24" (1/1) ... [2023-11-29 02:08:24,729 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 18, 2, 2]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 2, 1, 1]. [2023-11-29 02:08:24,729 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:08:24" (1/1) ... [2023-11-29 02:08:24,729 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:08:24" (1/1) ... [2023-11-29 02:08:24,742 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:08:24" (1/1) ... [2023-11-29 02:08:24,746 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:08:24" (1/1) ... [2023-11-29 02:08:24,749 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:08:24" (1/1) ... [2023-11-29 02:08:24,751 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:08:24" (1/1) ... [2023-11-29 02:08:24,757 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:08:24,758 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:08:24,758 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:08:24,758 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:08:24,759 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:08:24" (1/1) ... [2023-11-29 02:08:24,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:08:24,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:08:24,803 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:08:24,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:08:24,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:08:24,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:08:24,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:08:24,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:08:24,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:08:24,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 02:08:24,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:08:24,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:08:24,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:08:24,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 02:08:24,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 02:08:24,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 02:08:24,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 02:08:24,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 02:08:24,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:08:24,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:08:24,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:08:24,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 02:08:24,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 02:08:24,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:08:24,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:08:24,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:08:24,852 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 02:08:24,991 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:08:24,994 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:08:25,586 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:08:26,223 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:08:26,223 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 02:08:26,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:08:26 BoogieIcfgContainer [2023-11-29 02:08:26,224 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:08:26,226 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:08:26,226 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:08:26,229 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:08:26,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:08:24" (1/3) ... [2023-11-29 02:08:26,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55327b6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:08:26, skipping insertion in model container [2023-11-29 02:08:26,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:08:24" (2/3) ... [2023-11-29 02:08:26,230 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55327b6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:08:26, skipping insertion in model container [2023-11-29 02:08:26,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:08:26" (3/3) ... [2023-11-29 02:08:26,231 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2023-11-29 02:08:26,239 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 02:08:26,247 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:08:26,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:08:26,247 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:08:26,338 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 02:08:26,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 35 transitions, 84 flow [2023-11-29 02:08:26,405 INFO L124 PetriNetUnfolderBase]: 8/33 cut-off events. [2023-11-29 02:08:26,405 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:08:26,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 8/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 46 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2023-11-29 02:08:26,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 35 transitions, 84 flow [2023-11-29 02:08:26,412 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 32 transitions, 76 flow [2023-11-29 02:08:26,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:08:26,429 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@50e47103, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:08:26,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 02:08:26,446 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:08:26,446 INFO L124 PetriNetUnfolderBase]: 8/31 cut-off events. [2023-11-29 02:08:26,446 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:08:26,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:08:26,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:08:26,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:08:26,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:26,453 INFO L85 PathProgramCache]: Analyzing trace with hash -704617220, now seen corresponding path program 1 times [2023-11-29 02:08:26,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:26,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124442210] [2023-11-29 02:08:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:26,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:26,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:26,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124442210] [2023-11-29 02:08:26,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124442210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:08:26,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:08:26,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:08:26,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857025895] [2023-11-29 02:08:26,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:08:26,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:08:26,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:26,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:08:26,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:08:26,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:08:26,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:26,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:08:26,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:08:26,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:08:27,130 INFO L124 PetriNetUnfolderBase]: 163/281 cut-off events. [2023-11-29 02:08:27,130 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-29 02:08:27,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 281 events. 163/281 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 912 event pairs, 105 based on Foata normal form. 28/250 useless extension candidates. Maximal degree in co-relation 486. Up to 265 conditions per place. [2023-11-29 02:08:27,136 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 25 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2023-11-29 02:08:27,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 134 flow [2023-11-29 02:08:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:08:27,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:08:27,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2023-11-29 02:08:27,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2023-11-29 02:08:27,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 48 transitions. [2023-11-29 02:08:27,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 48 transitions. [2023-11-29 02:08:27,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:08:27,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 48 transitions. [2023-11-29 02:08:27,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:27,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:27,160 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:27,162 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 76 flow. Second operand 3 states and 48 transitions. [2023-11-29 02:08:27,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 134 flow [2023-11-29 02:08:27,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 02:08:27,168 INFO L231 Difference]: Finished difference. Result has 30 places, 32 transitions, 86 flow [2023-11-29 02:08:27,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=30, PETRI_TRANSITIONS=32} [2023-11-29 02:08:27,173 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2023-11-29 02:08:27,174 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 32 transitions, 86 flow [2023-11-29 02:08:27,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:27,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:08:27,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:08:27,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:08:27,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:08:27,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:27,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1658001116, now seen corresponding path program 1 times [2023-11-29 02:08:27,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:27,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896493207] [2023-11-29 02:08:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:27,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:08:27,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:27,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896493207] [2023-11-29 02:08:27,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896493207] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:08:27,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301829288] [2023-11-29 02:08:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:27,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:27,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:08:27,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:08:27,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:08:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:27,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:08:27,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:08:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:08:27,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:08:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:08:27,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301829288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:08:27,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:08:27,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-29 02:08:27,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384263075] [2023-11-29 02:08:27,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:08:27,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 02:08:27,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:27,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 02:08:27,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:08:27,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:08:27,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 32 transitions, 86 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:27,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:08:27,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:08:27,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:08:27,852 INFO L124 PetriNetUnfolderBase]: 163/287 cut-off events. [2023-11-29 02:08:27,852 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 02:08:27,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 287 events. 163/287 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 913 event pairs, 105 based on Foata normal form. 3/232 useless extension candidates. Maximal degree in co-relation 555. Up to 265 conditions per place. [2023-11-29 02:08:27,855 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 25 selfloop transitions, 10 changer transitions 0/38 dead transitions. [2023-11-29 02:08:27,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 180 flow [2023-11-29 02:08:27,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:08:27,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:08:27,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2023-11-29 02:08:27,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3380952380952381 [2023-11-29 02:08:27,858 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 71 transitions. [2023-11-29 02:08:27,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 71 transitions. [2023-11-29 02:08:27,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:08:27,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 71 transitions. [2023-11-29 02:08:27,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:27,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:27,861 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:27,861 INFO L175 Difference]: Start difference. First operand has 30 places, 32 transitions, 86 flow. Second operand 6 states and 71 transitions. [2023-11-29 02:08:27,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 180 flow [2023-11-29 02:08:27,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 38 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:08:27,863 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 148 flow [2023-11-29 02:08:27,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2023-11-29 02:08:27,864 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-11-29 02:08:27,865 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 148 flow [2023-11-29 02:08:27,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:27,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:08:27,865 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:08:27,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:08:28,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:28,068 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:08:28,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2039820346, now seen corresponding path program 2 times [2023-11-29 02:08:28,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:28,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75589398] [2023-11-29 02:08:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:08:28,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:28,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75589398] [2023-11-29 02:08:28,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75589398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:08:28,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218938760] [2023-11-29 02:08:28,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:08:28,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:28,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:08:28,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:08:28,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:08:28,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:08:28,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:08:28,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:08:28,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:08:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 02:08:29,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:08:29,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218938760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:08:29,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:08:29,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-11-29 02:08:29,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249235880] [2023-11-29 02:08:29,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:08:29,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:08:29,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:29,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:08:29,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:08:29,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:08:29,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:29,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:08:29,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:08:29,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:08:29,611 INFO L124 PetriNetUnfolderBase]: 207/383 cut-off events. [2023-11-29 02:08:29,612 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 02:08:29,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804 conditions, 383 events. 207/383 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1456 event pairs, 105 based on Foata normal form. 1/318 useless extension candidates. Maximal degree in co-relation 743. Up to 259 conditions per place. [2023-11-29 02:08:29,615 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 44 selfloop transitions, 1 changer transitions 10/58 dead transitions. [2023-11-29 02:08:29,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 58 transitions, 303 flow [2023-11-29 02:08:29,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:08:29,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:08:29,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2023-11-29 02:08:29,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2023-11-29 02:08:29,617 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 69 transitions. [2023-11-29 02:08:29,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 69 transitions. [2023-11-29 02:08:29,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:08:29,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 69 transitions. [2023-11-29 02:08:29,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:29,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:29,620 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:29,620 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 148 flow. Second operand 4 states and 69 transitions. [2023-11-29 02:08:29,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 58 transitions, 303 flow [2023-11-29 02:08:29,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 58 transitions, 287 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-29 02:08:29,624 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 141 flow [2023-11-29 02:08:29,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-11-29 02:08:29,625 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2023-11-29 02:08:29,625 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 141 flow [2023-11-29 02:08:29,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:29,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:08:29,626 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:08:29,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:08:29,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:29,826 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:08:29,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:29,827 INFO L85 PathProgramCache]: Analyzing trace with hash -685775356, now seen corresponding path program 3 times [2023-11-29 02:08:29,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:29,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137924529] [2023-11-29 02:08:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:29,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:08:30,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:30,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137924529] [2023-11-29 02:08:30,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137924529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:08:30,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424477627] [2023-11-29 02:08:30,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:08:30,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:30,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:08:30,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:08:30,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:08:30,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 02:08:30,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:08:30,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:08:30,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:08:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 02:08:30,649 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:08:30,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424477627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:08:30,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:08:30,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-11-29 02:08:30,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447935587] [2023-11-29 02:08:30,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:08:30,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:08:30,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:30,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:08:30,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:08:30,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:08:30,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:30,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:08:30,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:08:30,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:08:30,980 INFO L124 PetriNetUnfolderBase]: 227/434 cut-off events. [2023-11-29 02:08:30,980 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-11-29 02:08:30,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 434 events. 227/434 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1702 event pairs, 145 based on Foata normal form. 5/381 useless extension candidates. Maximal degree in co-relation 927. Up to 333 conditions per place. [2023-11-29 02:08:30,984 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 44 selfloop transitions, 1 changer transitions 8/56 dead transitions. [2023-11-29 02:08:30,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 292 flow [2023-11-29 02:08:30,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:08:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:08:30,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2023-11-29 02:08:30,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2023-11-29 02:08:30,986 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 67 transitions. [2023-11-29 02:08:30,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 67 transitions. [2023-11-29 02:08:30,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:08:30,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 67 transitions. [2023-11-29 02:08:30,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:30,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:30,988 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:30,988 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 141 flow. Second operand 4 states and 67 transitions. [2023-11-29 02:08:30,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 292 flow [2023-11-29 02:08:30,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 286 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-29 02:08:30,992 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 147 flow [2023-11-29 02:08:30,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-29 02:08:30,993 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2023-11-29 02:08:30,993 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 147 flow [2023-11-29 02:08:30,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:30,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:08:30,993 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:08:31,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:08:31,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:31,196 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:08:31,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:31,196 INFO L85 PathProgramCache]: Analyzing trace with hash -474829898, now seen corresponding path program 1 times [2023-11-29 02:08:31,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:31,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86499353] [2023-11-29 02:08:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:31,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 02:08:31,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:31,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86499353] [2023-11-29 02:08:31,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86499353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:08:31,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:08:31,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:08:31,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496068633] [2023-11-29 02:08:31,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:08:31,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:08:31,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:31,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:08:31,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:08:31,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:08:31,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:31,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:08:31,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:08:31,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:08:31,469 INFO L124 PetriNetUnfolderBase]: 157/307 cut-off events. [2023-11-29 02:08:31,469 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-11-29 02:08:31,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 307 events. 157/307 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1018 event pairs, 61 based on Foata normal form. 18/296 useless extension candidates. Maximal degree in co-relation 677. Up to 212 conditions per place. [2023-11-29 02:08:31,472 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 38 selfloop transitions, 2 changer transitions 6/49 dead transitions. [2023-11-29 02:08:31,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 267 flow [2023-11-29 02:08:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:08:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:08:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-29 02:08:31,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2023-11-29 02:08:31,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-29 02:08:31,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-29 02:08:31,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:08:31,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-29 02:08:31,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:31,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:31,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:31,475 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 147 flow. Second operand 3 states and 55 transitions. [2023-11-29 02:08:31,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 267 flow [2023-11-29 02:08:31,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 264 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-29 02:08:31,478 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 150 flow [2023-11-29 02:08:31,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-29 02:08:31,479 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2023-11-29 02:08:31,479 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 150 flow [2023-11-29 02:08:31,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:31,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:08:31,480 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:08:31,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:08:31,480 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:08:31,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:31,481 INFO L85 PathProgramCache]: Analyzing trace with hash -595105902, now seen corresponding path program 1 times [2023-11-29 02:08:31,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:31,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052444667] [2023-11-29 02:08:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:31,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:08:31,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:31,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052444667] [2023-11-29 02:08:31,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052444667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:08:31,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694815685] [2023-11-29 02:08:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:31,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:31,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:08:31,656 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:08:31,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:08:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:31,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:08:31,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:08:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:08:31,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:08:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:08:31,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694815685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:08:31,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:08:31,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 02:08:31,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037645726] [2023-11-29 02:08:31,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:08:31,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:08:31,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:31,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:08:31,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:08:31,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:08:31,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:31,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:08:31,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:08:31,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:08:32,088 INFO L124 PetriNetUnfolderBase]: 135/259 cut-off events. [2023-11-29 02:08:32,088 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2023-11-29 02:08:32,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 259 events. 135/259 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 743 event pairs, 97 based on Foata normal form. 1/230 useless extension candidates. Maximal degree in co-relation 554. Up to 237 conditions per place. [2023-11-29 02:08:32,091 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 25 selfloop transitions, 12 changer transitions 0/40 dead transitions. [2023-11-29 02:08:32,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 236 flow [2023-11-29 02:08:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:08:32,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 02:08:32,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2023-11-29 02:08:32,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2938775510204082 [2023-11-29 02:08:32,093 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 72 transitions. [2023-11-29 02:08:32,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 72 transitions. [2023-11-29 02:08:32,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:08:32,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 72 transitions. [2023-11-29 02:08:32,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:32,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:32,095 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:32,095 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 150 flow. Second operand 7 states and 72 transitions. [2023-11-29 02:08:32,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 236 flow [2023-11-29 02:08:32,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 228 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-29 02:08:32,098 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 188 flow [2023-11-29 02:08:32,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-11-29 02:08:32,099 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 15 predicate places. [2023-11-29 02:08:32,099 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 188 flow [2023-11-29 02:08:32,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:32,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:08:32,100 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:08:32,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:08:32,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 02:08:32,301 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:08:32,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:32,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1689468220, now seen corresponding path program 2 times [2023-11-29 02:08:32,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:32,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784204736] [2023-11-29 02:08:32,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:32,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:08:32,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:32,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784204736] [2023-11-29 02:08:32,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784204736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:08:32,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:08:32,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:08:32,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741798988] [2023-11-29 02:08:32,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:08:32,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:08:32,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:08:32,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:08:32,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:08:32,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:32,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:08:32,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:08:32,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:08:32,652 INFO L124 PetriNetUnfolderBase]: 175/332 cut-off events. [2023-11-29 02:08:32,652 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-29 02:08:32,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 332 events. 175/332 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1092 event pairs, 97 based on Foata normal form. 14/299 useless extension candidates. Maximal degree in co-relation 679. Up to 247 conditions per place. [2023-11-29 02:08:32,655 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 44 selfloop transitions, 3 changer transitions 1/51 dead transitions. [2023-11-29 02:08:32,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 309 flow [2023-11-29 02:08:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:08:32,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:08:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2023-11-29 02:08:32,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2023-11-29 02:08:32,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 52 transitions. [2023-11-29 02:08:32,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 52 transitions. [2023-11-29 02:08:32,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:08:32,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 52 transitions. [2023-11-29 02:08:32,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:32,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:32,659 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:32,659 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 188 flow. Second operand 3 states and 52 transitions. [2023-11-29 02:08:32,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 309 flow [2023-11-29 02:08:32,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 285 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-29 02:08:32,662 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 179 flow [2023-11-29 02:08:32,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-11-29 02:08:32,663 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2023-11-29 02:08:32,663 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 179 flow [2023-11-29 02:08:32,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:32,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:08:32,664 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:08:32,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 02:08:32,664 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:08:32,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:32,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1165883678, now seen corresponding path program 1 times [2023-11-29 02:08:32,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:32,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173568874] [2023-11-29 02:08:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:32,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 02:08:32,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:32,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173568874] [2023-11-29 02:08:32,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173568874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:08:32,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:08:32,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:08:32,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898743594] [2023-11-29 02:08:32,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:08:32,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:08:32,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:32,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:08:32,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:08:32,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:08:32,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:32,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:08:32,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:08:32,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:08:33,066 INFO L124 PetriNetUnfolderBase]: 227/437 cut-off events. [2023-11-29 02:08:33,066 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2023-11-29 02:08:33,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1031 conditions, 437 events. 227/437 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1686 event pairs, 133 based on Foata normal form. 18/415 useless extension candidates. Maximal degree in co-relation 966. Up to 315 conditions per place. [2023-11-29 02:08:33,069 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 46 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-11-29 02:08:33,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 316 flow [2023-11-29 02:08:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:08:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:08:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2023-11-29 02:08:33,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2023-11-29 02:08:33,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 52 transitions. [2023-11-29 02:08:33,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 52 transitions. [2023-11-29 02:08:33,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:08:33,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 52 transitions. [2023-11-29 02:08:33,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:33,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:33,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:33,072 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 179 flow. Second operand 3 states and 52 transitions. [2023-11-29 02:08:33,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 316 flow [2023-11-29 02:08:33,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:08:33,075 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 191 flow [2023-11-29 02:08:33,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-11-29 02:08:33,076 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2023-11-29 02:08:33,077 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 191 flow [2023-11-29 02:08:33,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:33,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:08:33,077 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:08:33,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 02:08:33,078 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:08:33,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:33,078 INFO L85 PathProgramCache]: Analyzing trace with hash -79656149, now seen corresponding path program 1 times [2023-11-29 02:08:33,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:33,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219276466] [2023-11-29 02:08:33,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:33,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:08:38,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:38,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219276466] [2023-11-29 02:08:38,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219276466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:08:38,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906430941] [2023-11-29 02:08:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:38,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:38,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:08:38,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:08:38,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:08:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:38,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 02:08:38,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:08:40,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:08:40,222 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 326 treesize of output 274 [2023-11-29 02:08:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:08:41,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:08:44,966 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:08:44,966 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 335 treesize of output 308 [2023-11-29 02:08:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:08:46,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906430941] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:08:46,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:08:46,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-11-29 02:08:46,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815583693] [2023-11-29 02:08:46,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:08:46,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 02:08:46,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:46,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 02:08:46,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:08:46,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:08:46,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 191 flow. Second operand has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:46,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:08:46,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:08:46,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:08:49,565 INFO L124 PetriNetUnfolderBase]: 477/905 cut-off events. [2023-11-29 02:08:49,565 INFO L125 PetriNetUnfolderBase]: For 430/430 co-relation queries the response was YES. [2023-11-29 02:08:49,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2209 conditions, 905 events. 477/905 cut-off events. For 430/430 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4442 event pairs, 69 based on Foata normal form. 1/904 useless extension candidates. Maximal degree in co-relation 2143. Up to 178 conditions per place. [2023-11-29 02:08:49,571 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 99 selfloop transitions, 32 changer transitions 19/153 dead transitions. [2023-11-29 02:08:49,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 153 transitions, 823 flow [2023-11-29 02:08:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:08:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 02:08:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 225 transitions. [2023-11-29 02:08:49,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2023-11-29 02:08:49,574 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 225 transitions. [2023-11-29 02:08:49,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 225 transitions. [2023-11-29 02:08:49,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:08:49,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 225 transitions. [2023-11-29 02:08:49,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 12.5) internal successors, (225), 18 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:49,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:49,578 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:49,579 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 191 flow. Second operand 18 states and 225 transitions. [2023-11-29 02:08:49,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 153 transitions, 823 flow [2023-11-29 02:08:49,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 153 transitions, 808 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:08:49,583 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 403 flow [2023-11-29 02:08:49,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=403, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2023-11-29 02:08:49,584 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2023-11-29 02:08:49,584 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 403 flow [2023-11-29 02:08:49,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:49,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:08:49,585 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:08:49,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:08:49,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:49,788 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:08:49,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:49,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1966457009, now seen corresponding path program 2 times [2023-11-29 02:08:49,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:49,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975846179] [2023-11-29 02:08:49,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:49,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:08:55,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:55,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975846179] [2023-11-29 02:08:55,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975846179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:08:55,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780473616] [2023-11-29 02:08:55,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:08:55,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:55,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:08:55,073 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:08:55,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:08:55,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:08:55,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:08:55,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-29 02:08:55,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:08:57,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:08:57,044 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 322 treesize of output 266 [2023-11-29 02:08:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:08:58,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:09:01,384 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:09:01,385 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 411 treesize of output 389 [2023-11-29 02:09:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:09:03,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780473616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:09:03,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:09:03,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-11-29 02:09:03,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754494578] [2023-11-29 02:09:03,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:09:03,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 02:09:03,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:03,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 02:09:03,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:09:03,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:09:03,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 403 flow. Second operand has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:03,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:09:03,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:09:03,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:09:06,645 INFO L124 PetriNetUnfolderBase]: 797/1580 cut-off events. [2023-11-29 02:09:06,645 INFO L125 PetriNetUnfolderBase]: For 2318/2318 co-relation queries the response was YES. [2023-11-29 02:09:06,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4460 conditions, 1580 events. 797/1580 cut-off events. For 2318/2318 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9221 event pairs, 115 based on Foata normal form. 3/1577 useless extension candidates. Maximal degree in co-relation 4411. Up to 306 conditions per place. [2023-11-29 02:09:06,655 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 118 selfloop transitions, 50 changer transitions 26/197 dead transitions. [2023-11-29 02:09:06,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 197 transitions, 1284 flow [2023-11-29 02:09:06,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 02:09:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 02:09:06,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 263 transitions. [2023-11-29 02:09:06,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3578231292517007 [2023-11-29 02:09:06,658 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 263 transitions. [2023-11-29 02:09:06,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 263 transitions. [2023-11-29 02:09:06,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:09:06,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 263 transitions. [2023-11-29 02:09:06,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 12.523809523809524) internal successors, (263), 21 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:06,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:06,662 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:06,662 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 403 flow. Second operand 21 states and 263 transitions. [2023-11-29 02:09:06,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 197 transitions, 1284 flow [2023-11-29 02:09:06,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 197 transitions, 1197 flow, removed 35 selfloop flow, removed 5 redundant places. [2023-11-29 02:09:06,676 INFO L231 Difference]: Finished difference. Result has 90 places, 95 transitions, 706 flow [2023-11-29 02:09:06,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=706, PETRI_PLACES=90, PETRI_TRANSITIONS=95} [2023-11-29 02:09:06,677 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 59 predicate places. [2023-11-29 02:09:06,677 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 95 transitions, 706 flow [2023-11-29 02:09:06,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:06,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:09:06,677 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:09:06,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:09:06,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:09:06,878 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:09:06,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:06,878 INFO L85 PathProgramCache]: Analyzing trace with hash -658111185, now seen corresponding path program 3 times [2023-11-29 02:09:06,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:06,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665680983] [2023-11-29 02:09:06,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:06,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:09:10,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:10,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665680983] [2023-11-29 02:09:10,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665680983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:09:10,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483779589] [2023-11-29 02:09:10,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:09:10,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:10,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:10,530 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:10,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:09:10,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:09:10,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:09:10,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 02:09:10,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:11,991 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:09:11,991 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 326 treesize of output 274 [2023-11-29 02:09:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:09:13,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:09:15,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:09:15,896 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 378 treesize of output 356 [2023-11-29 02:09:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:09:17,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483779589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:09:17,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:09:17,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-11-29 02:09:17,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416464161] [2023-11-29 02:09:17,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:09:17,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:09:17,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:09:17,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:09:17,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:09:17,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 95 transitions, 706 flow. Second operand has 24 states, 24 states have (on average 7.833333333333333) internal successors, (188), 24 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:17,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:09:17,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:09:17,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:09:19,660 INFO L124 PetriNetUnfolderBase]: 851/1676 cut-off events. [2023-11-29 02:09:19,660 INFO L125 PetriNetUnfolderBase]: For 5087/5087 co-relation queries the response was YES. [2023-11-29 02:09:19,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5372 conditions, 1676 events. 851/1676 cut-off events. For 5087/5087 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9967 event pairs, 163 based on Foata normal form. 2/1674 useless extension candidates. Maximal degree in co-relation 5300. Up to 454 conditions per place. [2023-11-29 02:09:19,670 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 105 selfloop transitions, 49 changer transitions 28/185 dead transitions. [2023-11-29 02:09:19,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 185 transitions, 1426 flow [2023-11-29 02:09:19,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 02:09:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 02:09:19,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 238 transitions. [2023-11-29 02:09:19,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34 [2023-11-29 02:09:19,672 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 238 transitions. [2023-11-29 02:09:19,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 238 transitions. [2023-11-29 02:09:19,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:09:19,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 238 transitions. [2023-11-29 02:09:19,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 11.9) internal successors, (238), 20 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:19,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 35.0) internal successors, (735), 21 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:19,675 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 35.0) internal successors, (735), 21 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:19,675 INFO L175 Difference]: Start difference. First operand has 90 places, 95 transitions, 706 flow. Second operand 20 states and 238 transitions. [2023-11-29 02:09:19,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 185 transitions, 1426 flow [2023-11-29 02:09:19,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 185 transitions, 1361 flow, removed 31 selfloop flow, removed 4 redundant places. [2023-11-29 02:09:19,693 INFO L231 Difference]: Finished difference. Result has 108 places, 102 transitions, 840 flow [2023-11-29 02:09:19,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=840, PETRI_PLACES=108, PETRI_TRANSITIONS=102} [2023-11-29 02:09:19,694 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2023-11-29 02:09:19,694 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 102 transitions, 840 flow [2023-11-29 02:09:19,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.833333333333333) internal successors, (188), 24 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:19,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:09:19,694 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:09:19,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 02:09:19,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:19,895 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:09:19,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:19,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1795760981, now seen corresponding path program 4 times [2023-11-29 02:09:19,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:19,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645668396] [2023-11-29 02:09:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:19,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:09:23,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:23,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645668396] [2023-11-29 02:09:23,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645668396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:09:23,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586836223] [2023-11-29 02:09:23,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:09:23,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:23,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:23,495 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:23,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:09:23,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:09:23,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:09:23,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 02:09:23,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:24,891 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:09:24,892 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 326 treesize of output 274 [2023-11-29 02:09:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:09:26,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:09:29,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:09:29,158 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 378 treesize of output 356 [2023-11-29 02:09:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:09:30,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586836223] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:09:30,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:09:30,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-11-29 02:09:30,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609117908] [2023-11-29 02:09:30,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:09:30,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 02:09:30,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:30,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 02:09:30,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:09:30,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:09:30,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 102 transitions, 840 flow. Second operand has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:30,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:09:30,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:09:30,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:09:32,715 INFO L124 PetriNetUnfolderBase]: 981/1933 cut-off events. [2023-11-29 02:09:32,716 INFO L125 PetriNetUnfolderBase]: For 8829/8829 co-relation queries the response was YES. [2023-11-29 02:09:32,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6633 conditions, 1933 events. 981/1933 cut-off events. For 8829/8829 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12095 event pairs, 273 based on Foata normal form. 2/1919 useless extension candidates. Maximal degree in co-relation 6552. Up to 716 conditions per place. [2023-11-29 02:09:32,734 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 123 selfloop transitions, 58 changer transitions 29/213 dead transitions. [2023-11-29 02:09:32,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 213 transitions, 1808 flow [2023-11-29 02:09:32,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 02:09:32,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 02:09:32,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 236 transitions. [2023-11-29 02:09:32,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33714285714285713 [2023-11-29 02:09:32,736 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 236 transitions. [2023-11-29 02:09:32,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 236 transitions. [2023-11-29 02:09:32,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:09:32,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 236 transitions. [2023-11-29 02:09:32,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 11.8) internal successors, (236), 20 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:32,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 35.0) internal successors, (735), 21 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:32,739 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 35.0) internal successors, (735), 21 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:32,739 INFO L175 Difference]: Start difference. First operand has 108 places, 102 transitions, 840 flow. Second operand 20 states and 236 transitions. [2023-11-29 02:09:32,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 213 transitions, 1808 flow [2023-11-29 02:09:32,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 213 transitions, 1697 flow, removed 28 selfloop flow, removed 13 redundant places. [2023-11-29 02:09:32,778 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 1146 flow [2023-11-29 02:09:32,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1146, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2023-11-29 02:09:32,779 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 88 predicate places. [2023-11-29 02:09:32,779 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 1146 flow [2023-11-29 02:09:32,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:32,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:09:32,779 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:09:32,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:09:32,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:32,981 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:09:32,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:32,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1579390353, now seen corresponding path program 5 times [2023-11-29 02:09:32,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:32,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397737215] [2023-11-29 02:09:32,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:32,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:09:36,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397737215] [2023-11-29 02:09:36,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397737215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:09:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298098441] [2023-11-29 02:09:36,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:09:36,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:36,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:36,887 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:36,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:09:37,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:09:37,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:09:37,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 02:09:37,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:39,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:09:39,176 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 367 treesize of output 295 [2023-11-29 02:09:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:09:40,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:09:42,653 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:09:42,654 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 373 treesize of output 344 [2023-11-29 02:09:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:09:44,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298098441] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:09:44,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:09:44,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-11-29 02:09:44,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670264214] [2023-11-29 02:09:44,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:09:44,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 02:09:44,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:44,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 02:09:44,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:09:44,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:09:44,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 1146 flow. Second operand has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:44,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:09:44,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:09:44,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:09:46,496 INFO L124 PetriNetUnfolderBase]: 1255/2489 cut-off events. [2023-11-29 02:09:46,496 INFO L125 PetriNetUnfolderBase]: For 16560/16560 co-relation queries the response was YES. [2023-11-29 02:09:46,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9231 conditions, 2489 events. 1255/2489 cut-off events. For 16560/16560 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16594 event pairs, 319 based on Foata normal form. 1/2484 useless extension candidates. Maximal degree in co-relation 9146. Up to 530 conditions per place. [2023-11-29 02:09:46,520 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 142 selfloop transitions, 64 changer transitions 12/221 dead transitions. [2023-11-29 02:09:46,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 221 transitions, 2196 flow [2023-11-29 02:09:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:09:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 02:09:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 189 transitions. [2023-11-29 02:09:46,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2023-11-29 02:09:46,523 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 189 transitions. [2023-11-29 02:09:46,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 189 transitions. [2023-11-29 02:09:46,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:09:46,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 189 transitions. [2023-11-29 02:09:46,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 12.6) internal successors, (189), 15 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:46,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:46,526 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:46,526 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 1146 flow. Second operand 15 states and 189 transitions. [2023-11-29 02:09:46,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 221 transitions, 2196 flow [2023-11-29 02:09:46,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 221 transitions, 1985 flow, removed 89 selfloop flow, removed 8 redundant places. [2023-11-29 02:09:46,598 INFO L231 Difference]: Finished difference. Result has 130 places, 141 transitions, 1422 flow [2023-11-29 02:09:46,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1422, PETRI_PLACES=130, PETRI_TRANSITIONS=141} [2023-11-29 02:09:46,600 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 99 predicate places. [2023-11-29 02:09:46,600 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 141 transitions, 1422 flow [2023-11-29 02:09:46,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:46,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:09:46,601 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:09:46,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:09:46,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:46,804 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:09:46,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:46,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2057185189, now seen corresponding path program 6 times [2023-11-29 02:09:46,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:46,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571921030] [2023-11-29 02:09:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:46,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:09:50,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:50,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571921030] [2023-11-29 02:09:50,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571921030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:09:50,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472250852] [2023-11-29 02:09:50,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:09:50,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:50,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:50,125 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:50,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:09:50,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 02:09:50,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:09:50,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 02:09:50,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:51,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:09:51,652 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 346 treesize of output 286 [2023-11-29 02:09:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:09:52,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:09:55,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:09:55,787 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 376 treesize of output 354 [2023-11-29 02:09:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:09:56,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472250852] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:09:56,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:09:56,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-11-29 02:09:56,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826263055] [2023-11-29 02:09:56,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:09:56,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 02:09:56,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:56,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 02:09:56,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:09:56,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:09:56,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 141 transitions, 1422 flow. Second operand has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:56,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:09:57,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:09:57,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:09:58,789 INFO L124 PetriNetUnfolderBase]: 1345/2707 cut-off events. [2023-11-29 02:09:58,789 INFO L125 PetriNetUnfolderBase]: For 18848/18848 co-relation queries the response was YES. [2023-11-29 02:09:58,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10075 conditions, 2707 events. 1345/2707 cut-off events. For 18848/18848 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18383 event pairs, 401 based on Foata normal form. 2/2703 useless extension candidates. Maximal degree in co-relation 9986. Up to 980 conditions per place. [2023-11-29 02:09:58,811 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 159 selfloop transitions, 62 changer transitions 11/235 dead transitions. [2023-11-29 02:09:58,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 235 transitions, 2365 flow [2023-11-29 02:09:58,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:09:58,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 02:09:58,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 189 transitions. [2023-11-29 02:09:58,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2023-11-29 02:09:58,813 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 189 transitions. [2023-11-29 02:09:58,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 189 transitions. [2023-11-29 02:09:58,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:09:58,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 189 transitions. [2023-11-29 02:09:58,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:58,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 35.0) internal successors, (525), 15 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:58,816 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 35.0) internal successors, (525), 15 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:58,816 INFO L175 Difference]: Start difference. First operand has 130 places, 141 transitions, 1422 flow. Second operand 14 states and 189 transitions. [2023-11-29 02:09:58,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 235 transitions, 2365 flow [2023-11-29 02:09:58,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 235 transitions, 2246 flow, removed 46 selfloop flow, removed 4 redundant places. [2023-11-29 02:09:58,874 INFO L231 Difference]: Finished difference. Result has 143 places, 150 transitions, 1603 flow [2023-11-29 02:09:58,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1603, PETRI_PLACES=143, PETRI_TRANSITIONS=150} [2023-11-29 02:09:58,875 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 112 predicate places. [2023-11-29 02:09:58,875 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 150 transitions, 1603 flow [2023-11-29 02:09:58,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:58,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:09:58,876 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:09:58,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:09:59,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:59,076 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:09:59,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:59,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2054434735, now seen corresponding path program 7 times [2023-11-29 02:09:59,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:59,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350872307] [2023-11-29 02:09:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:59,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:02,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:02,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350872307] [2023-11-29 02:10:02,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350872307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:02,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219327222] [2023-11-29 02:10:02,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:10:02,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:02,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:02,466 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:02,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:10:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:02,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 02:10:02,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:04,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:10:04,080 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 326 treesize of output 274 [2023-11-29 02:10:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:05,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:08,626 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:10:08,626 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 334 treesize of output 303 [2023-11-29 02:10:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:09,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219327222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:09,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:10:09,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-11-29 02:10:09,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040109060] [2023-11-29 02:10:09,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:09,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 02:10:09,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:09,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 02:10:09,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:10:09,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:10:09,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 150 transitions, 1603 flow. Second operand has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:09,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:10:09,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:10:09,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:10:12,696 INFO L124 PetriNetUnfolderBase]: 1361/2748 cut-off events. [2023-11-29 02:10:12,697 INFO L125 PetriNetUnfolderBase]: For 16162/16162 co-relation queries the response was YES. [2023-11-29 02:10:12,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10129 conditions, 2748 events. 1361/2748 cut-off events. For 16162/16162 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18812 event pairs, 343 based on Foata normal form. 1/2741 useless extension candidates. Maximal degree in co-relation 10036. Up to 635 conditions per place. [2023-11-29 02:10:12,743 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 139 selfloop transitions, 76 changer transitions 20/238 dead transitions. [2023-11-29 02:10:12,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 238 transitions, 2467 flow [2023-11-29 02:10:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:10:12,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 02:10:12,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 218 transitions. [2023-11-29 02:10:12,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.346031746031746 [2023-11-29 02:10:12,744 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 218 transitions. [2023-11-29 02:10:12,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 218 transitions. [2023-11-29 02:10:12,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:10:12,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 218 transitions. [2023-11-29 02:10:12,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 12.11111111111111) internal successors, (218), 18 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:12,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:12,747 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:12,747 INFO L175 Difference]: Start difference. First operand has 143 places, 150 transitions, 1603 flow. Second operand 18 states and 218 transitions. [2023-11-29 02:10:12,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 238 transitions, 2467 flow [2023-11-29 02:10:12,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 238 transitions, 2382 flow, removed 28 selfloop flow, removed 5 redundant places. [2023-11-29 02:10:12,787 INFO L231 Difference]: Finished difference. Result has 157 places, 152 transitions, 1729 flow [2023-11-29 02:10:12,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1729, PETRI_PLACES=157, PETRI_TRANSITIONS=152} [2023-11-29 02:10:12,788 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 126 predicate places. [2023-11-29 02:10:12,788 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 152 transitions, 1729 flow [2023-11-29 02:10:12,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:12,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:10:12,789 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:10:12,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:10:12,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:12,989 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:10:12,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:12,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1738974457, now seen corresponding path program 8 times [2023-11-29 02:10:12,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:12,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376076799] [2023-11-29 02:10:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:12,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:14,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:14,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376076799] [2023-11-29 02:10:14,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376076799] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:14,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909687853] [2023-11-29 02:10:14,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:10:14,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:14,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:14,722 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:14,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:10:14,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:10:14,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:10:14,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:10:14,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:15,531 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:10:15,532 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 161 treesize of output 133 [2023-11-29 02:10:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:15,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:16,384 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:10:16,385 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 44 treesize of output 75 [2023-11-29 02:10:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:16,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909687853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:16,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:10:16,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-29 02:10:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197335490] [2023-11-29 02:10:16,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:16,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 02:10:16,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 02:10:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:10:16,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:10:16,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 152 transitions, 1729 flow. Second operand has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:16,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:10:16,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:10:16,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:10:18,084 INFO L124 PetriNetUnfolderBase]: 1403/2823 cut-off events. [2023-11-29 02:10:18,084 INFO L125 PetriNetUnfolderBase]: For 19357/19357 co-relation queries the response was YES. [2023-11-29 02:10:18,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10738 conditions, 2823 events. 1403/2823 cut-off events. For 19357/19357 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19541 event pairs, 231 based on Foata normal form. 16/2839 useless extension candidates. Maximal degree in co-relation 10642. Up to 566 conditions per place. [2023-11-29 02:10:18,105 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 148 selfloop transitions, 84 changer transitions 11/246 dead transitions. [2023-11-29 02:10:18,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 246 transitions, 2858 flow [2023-11-29 02:10:18,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 02:10:18,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 02:10:18,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 213 transitions. [2023-11-29 02:10:18,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35798319327731093 [2023-11-29 02:10:18,107 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 213 transitions. [2023-11-29 02:10:18,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 213 transitions. [2023-11-29 02:10:18,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:10:18,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 213 transitions. [2023-11-29 02:10:18,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 12.529411764705882) internal successors, (213), 17 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:18,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 35.0) internal successors, (630), 18 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:18,109 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 35.0) internal successors, (630), 18 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:18,109 INFO L175 Difference]: Start difference. First operand has 157 places, 152 transitions, 1729 flow. Second operand 17 states and 213 transitions. [2023-11-29 02:10:18,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 246 transitions, 2858 flow [2023-11-29 02:10:18,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 246 transitions, 2668 flow, removed 19 selfloop flow, removed 13 redundant places. [2023-11-29 02:10:18,163 INFO L231 Difference]: Finished difference. Result has 161 places, 162 transitions, 1907 flow [2023-11-29 02:10:18,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1907, PETRI_PLACES=161, PETRI_TRANSITIONS=162} [2023-11-29 02:10:18,164 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 130 predicate places. [2023-11-29 02:10:18,164 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 162 transitions, 1907 flow [2023-11-29 02:10:18,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:18,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:10:18,164 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:10:18,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:10:18,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:18,365 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:10:18,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:18,365 INFO L85 PathProgramCache]: Analyzing trace with hash -322941151, now seen corresponding path program 9 times [2023-11-29 02:10:18,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:18,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089405176] [2023-11-29 02:10:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:18,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:20,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:20,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089405176] [2023-11-29 02:10:20,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089405176] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:20,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589187037] [2023-11-29 02:10:20,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:10:20,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:20,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:20,102 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:20,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:10:20,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:10:20,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:10:20,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:10:20,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:20,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:21,485 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:10:21,485 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 44 treesize of output 75 [2023-11-29 02:10:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:21,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589187037] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:21,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:10:21,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-29 02:10:21,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178198482] [2023-11-29 02:10:21,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:21,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:10:21,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:21,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:10:21,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:10:21,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:10:21,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 162 transitions, 1907 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:21,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:10:21,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:10:21,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:10:23,132 INFO L124 PetriNetUnfolderBase]: 1511/3031 cut-off events. [2023-11-29 02:10:23,132 INFO L125 PetriNetUnfolderBase]: For 21114/21114 co-relation queries the response was YES. [2023-11-29 02:10:23,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11895 conditions, 3031 events. 1511/3031 cut-off events. For 21114/21114 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21389 event pairs, 281 based on Foata normal form. 16/3047 useless extension candidates. Maximal degree in co-relation 11799. Up to 1183 conditions per place. [2023-11-29 02:10:23,152 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 146 selfloop transitions, 73 changer transitions 11/233 dead transitions. [2023-11-29 02:10:23,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 233 transitions, 2907 flow [2023-11-29 02:10:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:10:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 02:10:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 177 transitions. [2023-11-29 02:10:23,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33714285714285713 [2023-11-29 02:10:23,153 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 177 transitions. [2023-11-29 02:10:23,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 177 transitions. [2023-11-29 02:10:23,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:10:23,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 177 transitions. [2023-11-29 02:10:23,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 11.8) internal successors, (177), 15 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:23,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:23,155 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:23,155 INFO L175 Difference]: Start difference. First operand has 161 places, 162 transitions, 1907 flow. Second operand 15 states and 177 transitions. [2023-11-29 02:10:23,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 233 transitions, 2907 flow [2023-11-29 02:10:23,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 233 transitions, 2796 flow, removed 41 selfloop flow, removed 4 redundant places. [2023-11-29 02:10:23,211 INFO L231 Difference]: Finished difference. Result has 173 places, 173 transitions, 2189 flow [2023-11-29 02:10:23,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2189, PETRI_PLACES=173, PETRI_TRANSITIONS=173} [2023-11-29 02:10:23,211 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 142 predicate places. [2023-11-29 02:10:23,212 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 173 transitions, 2189 flow [2023-11-29 02:10:23,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:23,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:10:23,212 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:10:23,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:10:23,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:10:23,413 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:10:23,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:23,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1499699801, now seen corresponding path program 10 times [2023-11-29 02:10:23,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:23,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174258010] [2023-11-29 02:10:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:23,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:10:25,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:25,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174258010] [2023-11-29 02:10:25,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174258010] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:25,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029341814] [2023-11-29 02:10:25,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:10:25,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:25,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:25,505 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:25,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:10:25,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:10:25,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:10:25,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 02:10:25,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:26,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:10:26,316 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 157 treesize of output 137 [2023-11-29 02:10:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:26,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:27,581 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:10:27,582 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 44 treesize of output 75 [2023-11-29 02:10:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:27,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029341814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:27,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:10:27,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 8] total 28 [2023-11-29 02:10:27,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354484435] [2023-11-29 02:10:27,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:27,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 02:10:27,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 02:10:27,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:10:27,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:10:27,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 173 transitions, 2189 flow. Second operand has 28 states, 28 states have (on average 7.285714285714286) internal successors, (204), 28 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:27,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:10:27,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:10:27,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:10:31,200 INFO L124 PetriNetUnfolderBase]: 1799/3643 cut-off events. [2023-11-29 02:10:31,200 INFO L125 PetriNetUnfolderBase]: For 28765/28765 co-relation queries the response was YES. [2023-11-29 02:10:31,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14766 conditions, 3643 events. 1799/3643 cut-off events. For 28765/28765 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 26701 event pairs, 149 based on Foata normal form. 24/3667 useless extension candidates. Maximal degree in co-relation 14668. Up to 576 conditions per place. [2023-11-29 02:10:31,225 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 212 selfloop transitions, 154 changer transitions 27/396 dead transitions. [2023-11-29 02:10:31,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 396 transitions, 4389 flow [2023-11-29 02:10:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 02:10:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-29 02:10:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 478 transitions. [2023-11-29 02:10:31,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3414285714285714 [2023-11-29 02:10:31,227 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 478 transitions. [2023-11-29 02:10:31,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 478 transitions. [2023-11-29 02:10:31,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:10:31,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 478 transitions. [2023-11-29 02:10:31,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 11.95) internal successors, (478), 40 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:31,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 35.0) internal successors, (1435), 41 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:31,231 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 35.0) internal successors, (1435), 41 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:31,231 INFO L175 Difference]: Start difference. First operand has 173 places, 173 transitions, 2189 flow. Second operand 40 states and 478 transitions. [2023-11-29 02:10:31,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 396 transitions, 4389 flow [2023-11-29 02:10:31,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 396 transitions, 4268 flow, removed 28 selfloop flow, removed 8 redundant places. [2023-11-29 02:10:31,309 INFO L231 Difference]: Finished difference. Result has 214 places, 209 transitions, 3160 flow [2023-11-29 02:10:31,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3160, PETRI_PLACES=214, PETRI_TRANSITIONS=209} [2023-11-29 02:10:31,309 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 183 predicate places. [2023-11-29 02:10:31,310 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 209 transitions, 3160 flow [2023-11-29 02:10:31,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.285714285714286) internal successors, (204), 28 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:31,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:10:31,310 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:10:31,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:10:31,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:10:31,511 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:10:31,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:31,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2014297749, now seen corresponding path program 11 times [2023-11-29 02:10:31,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:31,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014331669] [2023-11-29 02:10:31,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:31,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:33,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:33,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014331669] [2023-11-29 02:10:33,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014331669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:33,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331386963] [2023-11-29 02:10:33,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:10:33,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:33,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:33,108 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:33,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:10:33,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:10:33,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:10:33,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:10:33,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:33,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:10:33,876 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 157 treesize of output 137 [2023-11-29 02:10:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:34,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:34,853 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:10:34,853 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 51 treesize of output 95 [2023-11-29 02:10:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:34,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331386963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:34,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:10:34,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-29 02:10:34,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710350092] [2023-11-29 02:10:34,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:34,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:10:34,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:10:34,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:10:34,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:10:34,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 209 transitions, 3160 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:34,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:10:34,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:10:34,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:10:36,800 INFO L124 PetriNetUnfolderBase]: 1931/3888 cut-off events. [2023-11-29 02:10:36,800 INFO L125 PetriNetUnfolderBase]: For 44554/44554 co-relation queries the response was YES. [2023-11-29 02:10:36,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17379 conditions, 3888 events. 1931/3888 cut-off events. For 44554/44554 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28843 event pairs, 413 based on Foata normal form. 10/3894 useless extension candidates. Maximal degree in co-relation 17264. Up to 990 conditions per place. [2023-11-29 02:10:36,831 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 178 selfloop transitions, 119 changer transitions 12/312 dead transitions. [2023-11-29 02:10:36,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 312 transitions, 4594 flow [2023-11-29 02:10:36,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 02:10:36,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 02:10:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 235 transitions. [2023-11-29 02:10:36,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3533834586466165 [2023-11-29 02:10:36,833 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 235 transitions. [2023-11-29 02:10:36,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 235 transitions. [2023-11-29 02:10:36,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:10:36,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 235 transitions. [2023-11-29 02:10:36,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.368421052631579) internal successors, (235), 19 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:36,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:36,836 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:36,836 INFO L175 Difference]: Start difference. First operand has 214 places, 209 transitions, 3160 flow. Second operand 19 states and 235 transitions. [2023-11-29 02:10:36,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 312 transitions, 4594 flow [2023-11-29 02:10:37,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 312 transitions, 3993 flow, removed 147 selfloop flow, removed 29 redundant places. [2023-11-29 02:10:37,045 INFO L231 Difference]: Finished difference. Result has 209 places, 224 transitions, 3268 flow [2023-11-29 02:10:37,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2636, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3268, PETRI_PLACES=209, PETRI_TRANSITIONS=224} [2023-11-29 02:10:37,046 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 178 predicate places. [2023-11-29 02:10:37,046 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 224 transitions, 3268 flow [2023-11-29 02:10:37,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:37,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:10:37,047 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:10:37,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:10:37,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:37,247 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:10:37,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:37,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1095176463, now seen corresponding path program 12 times [2023-11-29 02:10:37,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:37,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316719321] [2023-11-29 02:10:37,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:37,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:38,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:38,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316719321] [2023-11-29 02:10:38,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316719321] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:38,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454637184] [2023-11-29 02:10:38,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:10:38,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:38,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:38,823 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:38,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:10:39,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 02:10:39,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:10:39,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:10:39,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:39,775 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:10:39,775 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 124 treesize of output 108 [2023-11-29 02:10:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:40,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:40,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:10:40,537 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 168 treesize of output 194 [2023-11-29 02:10:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:41,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454637184] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:41,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:10:41,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-29 02:10:41,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778621403] [2023-11-29 02:10:41,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:41,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:10:41,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:41,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:10:41,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:10:41,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:10:41,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 224 transitions, 3268 flow. Second operand has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:41,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:10:41,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:10:41,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:10:42,700 INFO L124 PetriNetUnfolderBase]: 1905/3843 cut-off events. [2023-11-29 02:10:42,700 INFO L125 PetriNetUnfolderBase]: For 38975/38975 co-relation queries the response was YES. [2023-11-29 02:10:42,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16388 conditions, 3843 events. 1905/3843 cut-off events. For 38975/38975 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 28486 event pairs, 423 based on Foata normal form. 8/3843 useless extension candidates. Maximal degree in co-relation 16279. Up to 1030 conditions per place. [2023-11-29 02:10:42,731 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 168 selfloop transitions, 116 changer transitions 10/297 dead transitions. [2023-11-29 02:10:42,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 297 transitions, 4244 flow [2023-11-29 02:10:42,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:10:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 02:10:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 193 transitions. [2023-11-29 02:10:42,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3676190476190476 [2023-11-29 02:10:42,733 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 193 transitions. [2023-11-29 02:10:42,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 193 transitions. [2023-11-29 02:10:42,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:10:42,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 193 transitions. [2023-11-29 02:10:42,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 12.866666666666667) internal successors, (193), 15 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:42,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:42,735 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:42,735 INFO L175 Difference]: Start difference. First operand has 209 places, 224 transitions, 3268 flow. Second operand 15 states and 193 transitions. [2023-11-29 02:10:42,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 297 transitions, 4244 flow [2023-11-29 02:10:42,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 297 transitions, 4052 flow, removed 73 selfloop flow, removed 7 redundant places. [2023-11-29 02:10:42,894 INFO L231 Difference]: Finished difference. Result has 216 places, 220 transitions, 3254 flow [2023-11-29 02:10:42,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3049, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3254, PETRI_PLACES=216, PETRI_TRANSITIONS=220} [2023-11-29 02:10:42,894 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 185 predicate places. [2023-11-29 02:10:42,894 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 220 transitions, 3254 flow [2023-11-29 02:10:42,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:42,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:10:42,895 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:10:42,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:10:43,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:43,095 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:10:43,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:43,096 INFO L85 PathProgramCache]: Analyzing trace with hash 968649539, now seen corresponding path program 13 times [2023-11-29 02:10:43,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:43,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988542880] [2023-11-29 02:10:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:43,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:44,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:44,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988542880] [2023-11-29 02:10:44,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988542880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:44,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796007500] [2023-11-29 02:10:44,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:10:44,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:44,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:44,820 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:44,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:10:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:45,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:10:45,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:45,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:10:45,562 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 157 treesize of output 137 [2023-11-29 02:10:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:45,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:46,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:10:46,607 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 51 treesize of output 95 [2023-11-29 02:10:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:46,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796007500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:46,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:10:46,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-29 02:10:46,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880725984] [2023-11-29 02:10:46,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:46,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:10:46,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:46,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:10:46,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:10:46,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:10:46,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 220 transitions, 3254 flow. Second operand has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:46,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:10:46,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:10:46,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:10:48,451 INFO L124 PetriNetUnfolderBase]: 1845/3713 cut-off events. [2023-11-29 02:10:48,451 INFO L125 PetriNetUnfolderBase]: For 37456/37456 co-relation queries the response was YES. [2023-11-29 02:10:48,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16145 conditions, 3713 events. 1845/3713 cut-off events. For 37456/37456 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27417 event pairs, 403 based on Foata normal form. 8/3717 useless extension candidates. Maximal degree in co-relation 16036. Up to 970 conditions per place. [2023-11-29 02:10:48,481 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 170 selfloop transitions, 108 changer transitions 9/290 dead transitions. [2023-11-29 02:10:48,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 290 transitions, 4201 flow [2023-11-29 02:10:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:10:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 02:10:48,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 197 transitions. [2023-11-29 02:10:48,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3517857142857143 [2023-11-29 02:10:48,483 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 197 transitions. [2023-11-29 02:10:48,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 197 transitions. [2023-11-29 02:10:48,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:10:48,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 197 transitions. [2023-11-29 02:10:48,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.3125) internal successors, (197), 16 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:48,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 35.0) internal successors, (595), 17 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:48,484 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 35.0) internal successors, (595), 17 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:48,485 INFO L175 Difference]: Start difference. First operand has 216 places, 220 transitions, 3254 flow. Second operand 16 states and 197 transitions. [2023-11-29 02:10:48,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 290 transitions, 4201 flow [2023-11-29 02:10:48,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 290 transitions, 4000 flow, removed 4 selfloop flow, removed 11 redundant places. [2023-11-29 02:10:48,611 INFO L231 Difference]: Finished difference. Result has 218 places, 216 transitions, 3211 flow [2023-11-29 02:10:48,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3012, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3211, PETRI_PLACES=218, PETRI_TRANSITIONS=216} [2023-11-29 02:10:48,611 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 187 predicate places. [2023-11-29 02:10:48,612 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 216 transitions, 3211 flow [2023-11-29 02:10:48,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:48,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:10:48,612 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:10:48,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 02:10:48,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:48,813 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:10:48,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:48,813 INFO L85 PathProgramCache]: Analyzing trace with hash -986617977, now seen corresponding path program 14 times [2023-11-29 02:10:48,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:48,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950103849] [2023-11-29 02:10:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:48,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:50,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:50,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950103849] [2023-11-29 02:10:50,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950103849] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:50,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458151698] [2023-11-29 02:10:50,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:10:50,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:50,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:50,551 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:50,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:10:50,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:10:50,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:10:50,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:10:50,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:51,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:10:51,545 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 124 treesize of output 108 [2023-11-29 02:10:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:51,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:52,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:10:52,337 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 168 treesize of output 194 [2023-11-29 02:10:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:52,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458151698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:52,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:10:52,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-29 02:10:52,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301897513] [2023-11-29 02:10:52,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:52,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:10:52,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:52,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:10:52,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:10:52,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:10:52,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 216 transitions, 3211 flow. Second operand has 20 states, 20 states have (on average 8.1) internal successors, (162), 20 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:52,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:10:52,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:10:52,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:10:54,624 INFO L124 PetriNetUnfolderBase]: 1825/3668 cut-off events. [2023-11-29 02:10:54,624 INFO L125 PetriNetUnfolderBase]: For 37286/37286 co-relation queries the response was YES. [2023-11-29 02:10:54,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16031 conditions, 3668 events. 1825/3668 cut-off events. For 37286/37286 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 26923 event pairs, 377 based on Foata normal form. 6/3666 useless extension candidates. Maximal degree in co-relation 15923. Up to 938 conditions per place. [2023-11-29 02:10:54,652 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 156 selfloop transitions, 121 changer transitions 15/295 dead transitions. [2023-11-29 02:10:54,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 295 transitions, 4181 flow [2023-11-29 02:10:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 02:10:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 02:10:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 213 transitions. [2023-11-29 02:10:54,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35798319327731093 [2023-11-29 02:10:54,653 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 213 transitions. [2023-11-29 02:10:54,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 213 transitions. [2023-11-29 02:10:54,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:10:54,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 213 transitions. [2023-11-29 02:10:54,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 12.529411764705882) internal successors, (213), 17 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:54,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 35.0) internal successors, (630), 18 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:54,655 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 35.0) internal successors, (630), 18 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:54,655 INFO L175 Difference]: Start difference. First operand has 218 places, 216 transitions, 3211 flow. Second operand 17 states and 213 transitions. [2023-11-29 02:10:54,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 295 transitions, 4181 flow [2023-11-29 02:10:54,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 295 transitions, 4094 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-11-29 02:10:54,775 INFO L231 Difference]: Finished difference. Result has 222 places, 215 transitions, 3351 flow [2023-11-29 02:10:54,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3109, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3351, PETRI_PLACES=222, PETRI_TRANSITIONS=215} [2023-11-29 02:10:54,776 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 191 predicate places. [2023-11-29 02:10:54,776 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 215 transitions, 3351 flow [2023-11-29 02:10:54,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.1) internal successors, (162), 20 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:54,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:10:54,776 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:10:54,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:10:54,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 02:10:54,976 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:10:54,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:54,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1440381801, now seen corresponding path program 15 times [2023-11-29 02:10:54,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:54,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333805008] [2023-11-29 02:10:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:54,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:56,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:56,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333805008] [2023-11-29 02:10:56,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333805008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:56,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966089769] [2023-11-29 02:10:56,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:10:56,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:56,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:56,696 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:56,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:10:57,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:10:57,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:10:57,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 02:10:57,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:57,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:58,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:10:58,570 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 51 treesize of output 95 [2023-11-29 02:10:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:10:58,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966089769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:58,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:10:58,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2023-11-29 02:10:58,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053781540] [2023-11-29 02:10:58,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:58,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:10:58,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:58,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:10:58,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:10:58,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:10:58,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 215 transitions, 3351 flow. Second operand has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:58,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:10:58,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:10:58,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:11:00,882 INFO L124 PetriNetUnfolderBase]: 1857/3708 cut-off events. [2023-11-29 02:11:00,882 INFO L125 PetriNetUnfolderBase]: For 41440/41440 co-relation queries the response was YES. [2023-11-29 02:11:00,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16798 conditions, 3708 events. 1857/3708 cut-off events. For 41440/41440 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 27372 event pairs, 417 based on Foata normal form. 32/3734 useless extension candidates. Maximal degree in co-relation 16690. Up to 978 conditions per place. [2023-11-29 02:11:00,914 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 175 selfloop transitions, 115 changer transitions 19/312 dead transitions. [2023-11-29 02:11:00,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 312 transitions, 4468 flow [2023-11-29 02:11:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:11:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 02:11:00,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 261 transitions. [2023-11-29 02:11:00,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33896103896103896 [2023-11-29 02:11:00,915 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 261 transitions. [2023-11-29 02:11:00,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 261 transitions. [2023-11-29 02:11:00,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:11:00,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 261 transitions. [2023-11-29 02:11:00,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 11.863636363636363) internal successors, (261), 22 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:00,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 35.0) internal successors, (805), 23 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:00,917 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 35.0) internal successors, (805), 23 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:00,917 INFO L175 Difference]: Start difference. First operand has 222 places, 215 transitions, 3351 flow. Second operand 22 states and 261 transitions. [2023-11-29 02:11:00,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 312 transitions, 4468 flow [2023-11-29 02:11:01,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 312 transitions, 4360 flow, removed 1 selfloop flow, removed 13 redundant places. [2023-11-29 02:11:01,032 INFO L231 Difference]: Finished difference. Result has 231 places, 220 transitions, 3582 flow [2023-11-29 02:11:01,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3162, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3582, PETRI_PLACES=231, PETRI_TRANSITIONS=220} [2023-11-29 02:11:01,032 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 200 predicate places. [2023-11-29 02:11:01,033 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 220 transitions, 3582 flow [2023-11-29 02:11:01,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:01,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:11:01,033 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:11:01,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:11:01,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 02:11:01,233 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:11:01,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:11:01,234 INFO L85 PathProgramCache]: Analyzing trace with hash -562169839, now seen corresponding path program 16 times [2023-11-29 02:11:01,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:11:01,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219180093] [2023-11-29 02:11:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:11:01,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:11:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:02,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:11:02,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219180093] [2023-11-29 02:11:02,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219180093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:11:02,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873191612] [2023-11-29 02:11:02,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:11:02,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:02,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:11:02,764 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:11:02,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:11:03,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:11:03,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:11:03,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 02:11:03,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:11:03,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:11:03,793 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 127 treesize of output 115 [2023-11-29 02:11:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:03,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:11:04,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:11:04,552 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 168 treesize of output 194 [2023-11-29 02:11:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:05,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873191612] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:11:05,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:11:05,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2023-11-29 02:11:05,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203708401] [2023-11-29 02:11:05,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:11:05,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:11:05,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:11:05,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:11:05,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:11:05,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:11:05,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 220 transitions, 3582 flow. Second operand has 21 states, 21 states have (on average 7.571428571428571) internal successors, (159), 21 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:05,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:11:05,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:11:05,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:11:06,638 INFO L124 PetriNetUnfolderBase]: 1835/3651 cut-off events. [2023-11-29 02:11:06,639 INFO L125 PetriNetUnfolderBase]: For 44107/44107 co-relation queries the response was YES. [2023-11-29 02:11:06,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17013 conditions, 3651 events. 1835/3651 cut-off events. For 44107/44107 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 26812 event pairs, 587 based on Foata normal form. 4/3645 useless extension candidates. Maximal degree in co-relation 16904. Up to 1843 conditions per place. [2023-11-29 02:11:06,666 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 167 selfloop transitions, 70 changer transitions 20/260 dead transitions. [2023-11-29 02:11:06,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 260 transitions, 4374 flow [2023-11-29 02:11:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:11:06,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 02:11:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2023-11-29 02:11:06,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34285714285714286 [2023-11-29 02:11:06,667 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 132 transitions. [2023-11-29 02:11:06,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 132 transitions. [2023-11-29 02:11:06,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:11:06,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 132 transitions. [2023-11-29 02:11:06,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.0) internal successors, (132), 11 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:06,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:06,668 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:06,668 INFO L175 Difference]: Start difference. First operand has 231 places, 220 transitions, 3582 flow. Second operand 11 states and 132 transitions. [2023-11-29 02:11:06,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 260 transitions, 4374 flow [2023-11-29 02:11:06,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 260 transitions, 4314 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-11-29 02:11:06,786 INFO L231 Difference]: Finished difference. Result has 232 places, 218 transitions, 3635 flow [2023-11-29 02:11:06,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3635, PETRI_PLACES=232, PETRI_TRANSITIONS=218} [2023-11-29 02:11:06,786 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 201 predicate places. [2023-11-29 02:11:06,787 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 218 transitions, 3635 flow [2023-11-29 02:11:06,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.571428571428571) internal successors, (159), 21 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:06,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:11:06,787 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:11:06,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 02:11:06,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 02:11:06,987 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:11:06,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:11:06,988 INFO L85 PathProgramCache]: Analyzing trace with hash -667872600, now seen corresponding path program 17 times [2023-11-29 02:11:06,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:11:06,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679153949] [2023-11-29 02:11:06,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:11:06,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:11:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:08,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:11:08,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679153949] [2023-11-29 02:11:08,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679153949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:11:08,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970142474] [2023-11-29 02:11:08,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:11:08,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:08,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:11:08,537 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:11:08,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:11:08,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:11:08,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:11:08,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 02:11:08,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:11:09,749 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:11:09,749 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 124 treesize of output 108 [2023-11-29 02:11:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:10,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:11:10,678 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:11:10,678 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 164 treesize of output 177 [2023-11-29 02:11:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:11,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970142474] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:11:11,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:11:11,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-29 02:11:11,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787769986] [2023-11-29 02:11:11,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:11:11,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:11:11,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:11:11,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:11:11,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:11:11,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:11:11,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 218 transitions, 3635 flow. Second operand has 20 states, 20 states have (on average 8.0) internal successors, (160), 20 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:11,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:11:11,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:11:11,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:11:12,944 INFO L124 PetriNetUnfolderBase]: 1881/3739 cut-off events. [2023-11-29 02:11:12,944 INFO L125 PetriNetUnfolderBase]: For 46893/46893 co-relation queries the response was YES. [2023-11-29 02:11:12,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17612 conditions, 3739 events. 1881/3739 cut-off events. For 46893/46893 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27526 event pairs, 487 based on Foata normal form. 8/3745 useless extension candidates. Maximal degree in co-relation 17502. Up to 1248 conditions per place. [2023-11-29 02:11:12,974 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 198 selfloop transitions, 91 changer transitions 9/301 dead transitions. [2023-11-29 02:11:12,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 301 transitions, 4735 flow [2023-11-29 02:11:12,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:11:12,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 02:11:12,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 207 transitions. [2023-11-29 02:11:12,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36964285714285716 [2023-11-29 02:11:12,975 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 207 transitions. [2023-11-29 02:11:12,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 207 transitions. [2023-11-29 02:11:12,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:11:12,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 207 transitions. [2023-11-29 02:11:12,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.9375) internal successors, (207), 16 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:12,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 35.0) internal successors, (595), 17 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:12,976 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 35.0) internal successors, (595), 17 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:12,976 INFO L175 Difference]: Start difference. First operand has 232 places, 218 transitions, 3635 flow. Second operand 16 states and 207 transitions. [2023-11-29 02:11:12,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 301 transitions, 4735 flow [2023-11-29 02:11:13,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 301 transitions, 4611 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-11-29 02:11:13,127 INFO L231 Difference]: Finished difference. Result has 238 places, 220 transitions, 3731 flow [2023-11-29 02:11:13,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3731, PETRI_PLACES=238, PETRI_TRANSITIONS=220} [2023-11-29 02:11:13,127 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 207 predicate places. [2023-11-29 02:11:13,127 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 220 transitions, 3731 flow [2023-11-29 02:11:13,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.0) internal successors, (160), 20 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:13,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:11:13,128 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:11:13,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:11:13,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 02:11:13,328 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:11:13,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:11:13,328 INFO L85 PathProgramCache]: Analyzing trace with hash -80108516, now seen corresponding path program 18 times [2023-11-29 02:11:13,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:11:13,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210943077] [2023-11-29 02:11:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:11:13,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:11:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:15,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:11:15,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210943077] [2023-11-29 02:11:15,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210943077] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:11:15,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084248936] [2023-11-29 02:11:15,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:11:15,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:15,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:11:15,022 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:11:15,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:11:15,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 02:11:15,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:11:15,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 02:11:15,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:11:16,214 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:11:16,214 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 110 treesize of output 94 [2023-11-29 02:11:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:16,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:11:16,891 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:11:16,891 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 164 treesize of output 177 [2023-11-29 02:11:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:17,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084248936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:11:17,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:11:17,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2023-11-29 02:11:17,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865482955] [2023-11-29 02:11:17,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:11:17,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:11:17,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:11:17,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:11:17,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:11:17,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:11:17,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 220 transitions, 3731 flow. Second operand has 19 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:17,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:11:17,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:11:17,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:11:19,000 INFO L124 PetriNetUnfolderBase]: 1887/3768 cut-off events. [2023-11-29 02:11:19,000 INFO L125 PetriNetUnfolderBase]: For 46284/46284 co-relation queries the response was YES. [2023-11-29 02:11:19,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17917 conditions, 3768 events. 1887/3768 cut-off events. For 46284/46284 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 27747 event pairs, 405 based on Foata normal form. 6/3772 useless extension candidates. Maximal degree in co-relation 17807. Up to 892 conditions per place. [2023-11-29 02:11:19,028 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 174 selfloop transitions, 93 changer transitions 18/288 dead transitions. [2023-11-29 02:11:19,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 288 transitions, 4708 flow [2023-11-29 02:11:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:11:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 02:11:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 179 transitions. [2023-11-29 02:11:19,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34095238095238095 [2023-11-29 02:11:19,029 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 179 transitions. [2023-11-29 02:11:19,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 179 transitions. [2023-11-29 02:11:19,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:11:19,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 179 transitions. [2023-11-29 02:11:19,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 11.933333333333334) internal successors, (179), 15 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:19,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:19,030 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:19,030 INFO L175 Difference]: Start difference. First operand has 238 places, 220 transitions, 3731 flow. Second operand 15 states and 179 transitions. [2023-11-29 02:11:19,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 288 transitions, 4708 flow [2023-11-29 02:11:19,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 288 transitions, 4523 flow, removed 10 selfloop flow, removed 10 redundant places. [2023-11-29 02:11:19,165 INFO L231 Difference]: Finished difference. Result has 243 places, 225 transitions, 3914 flow [2023-11-29 02:11:19,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3549, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3914, PETRI_PLACES=243, PETRI_TRANSITIONS=225} [2023-11-29 02:11:19,166 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 212 predicate places. [2023-11-29 02:11:19,166 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 225 transitions, 3914 flow [2023-11-29 02:11:19,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:19,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:11:19,166 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:11:19,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 02:11:19,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 02:11:19,367 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:11:19,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:11:19,367 INFO L85 PathProgramCache]: Analyzing trace with hash 737791132, now seen corresponding path program 19 times [2023-11-29 02:11:19,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:11:19,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019764906] [2023-11-29 02:11:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:11:19,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:11:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:21,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:11:21,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019764906] [2023-11-29 02:11:21,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019764906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:11:21,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645603807] [2023-11-29 02:11:21,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:11:21,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:21,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:11:21,026 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:11:21,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 02:11:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:21,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 02:11:21,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:11:22,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:11:22,185 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 124 treesize of output 108 [2023-11-29 02:11:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:22,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:11:23,113 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:11:23,113 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 164 treesize of output 177 [2023-11-29 02:11:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:23,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645603807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:11:23,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:11:23,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2023-11-29 02:11:23,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719175002] [2023-11-29 02:11:23,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:11:23,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:11:23,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:11:23,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:11:23,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:11:23,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:11:23,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 225 transitions, 3914 flow. Second operand has 21 states, 21 states have (on average 7.809523809523809) internal successors, (164), 21 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:23,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:11:23,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:11:23,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:11:26,463 INFO L124 PetriNetUnfolderBase]: 1821/3613 cut-off events. [2023-11-29 02:11:26,463 INFO L125 PetriNetUnfolderBase]: For 44617/44617 co-relation queries the response was YES. [2023-11-29 02:11:26,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17501 conditions, 3613 events. 1821/3613 cut-off events. For 44617/44617 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 26321 event pairs, 257 based on Foata normal form. 12/3617 useless extension candidates. Maximal degree in co-relation 17390. Up to 714 conditions per place. [2023-11-29 02:11:26,492 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 198 selfloop transitions, 127 changer transitions 29/357 dead transitions. [2023-11-29 02:11:26,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 357 transitions, 5025 flow [2023-11-29 02:11:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 02:11:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 02:11:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 363 transitions. [2023-11-29 02:11:26,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32410714285714287 [2023-11-29 02:11:26,494 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 363 transitions. [2023-11-29 02:11:26,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 363 transitions. [2023-11-29 02:11:26,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:11:26,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 363 transitions. [2023-11-29 02:11:26,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 11.34375) internal successors, (363), 32 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:26,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 35.0) internal successors, (1155), 33 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:26,498 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 35.0) internal successors, (1155), 33 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:26,498 INFO L175 Difference]: Start difference. First operand has 243 places, 225 transitions, 3914 flow. Second operand 32 states and 363 transitions. [2023-11-29 02:11:26,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 357 transitions, 5025 flow [2023-11-29 02:11:26,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 357 transitions, 4897 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-11-29 02:11:26,645 INFO L231 Difference]: Finished difference. Result has 266 places, 223 transitions, 4012 flow [2023-11-29 02:11:26,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3756, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4012, PETRI_PLACES=266, PETRI_TRANSITIONS=223} [2023-11-29 02:11:26,646 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 235 predicate places. [2023-11-29 02:11:26,646 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 223 transitions, 4012 flow [2023-11-29 02:11:26,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.809523809523809) internal successors, (164), 21 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:26,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:11:26,646 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:11:26,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 02:11:26,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 02:11:26,847 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:11:26,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:11:26,847 INFO L85 PathProgramCache]: Analyzing trace with hash 673264860, now seen corresponding path program 20 times [2023-11-29 02:11:26,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:11:26,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547696988] [2023-11-29 02:11:26,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:11:26,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:11:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:28,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:11:28,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547696988] [2023-11-29 02:11:28,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547696988] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:11:28,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140133763] [2023-11-29 02:11:28,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:11:28,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:28,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:11:28,476 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:11:28,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 02:11:28,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:11:28,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:11:28,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 02:11:28,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:11:29,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:11:29,568 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 127 treesize of output 115 [2023-11-29 02:11:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:29,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:11:30,371 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:11:30,372 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 164 treesize of output 177 [2023-11-29 02:11:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:30,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140133763] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:11:30,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:11:30,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-29 02:11:30,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736510525] [2023-11-29 02:11:30,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:11:30,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:11:30,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:11:30,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:11:30,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:11:30,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:11:30,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 223 transitions, 4012 flow. Second operand has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:30,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:11:30,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:11:30,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:11:33,053 INFO L124 PetriNetUnfolderBase]: 1765/3519 cut-off events. [2023-11-29 02:11:33,053 INFO L125 PetriNetUnfolderBase]: For 41534/41534 co-relation queries the response was YES. [2023-11-29 02:11:33,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17161 conditions, 3519 events. 1765/3519 cut-off events. For 41534/41534 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25575 event pairs, 543 based on Foata normal form. 12/3529 useless extension candidates. Maximal degree in co-relation 17054. Up to 1248 conditions per place. [2023-11-29 02:11:33,081 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 168 selfloop transitions, 76 changer transitions 22/269 dead transitions. [2023-11-29 02:11:33,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 269 transitions, 4613 flow [2023-11-29 02:11:33,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:11:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 02:11:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 153 transitions. [2023-11-29 02:11:33,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2023-11-29 02:11:33,083 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 153 transitions. [2023-11-29 02:11:33,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 153 transitions. [2023-11-29 02:11:33,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:11:33,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 153 transitions. [2023-11-29 02:11:33,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:33,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 35.0) internal successors, (455), 13 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:33,085 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 35.0) internal successors, (455), 13 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:33,085 INFO L175 Difference]: Start difference. First operand has 266 places, 223 transitions, 4012 flow. Second operand 12 states and 153 transitions. [2023-11-29 02:11:33,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 269 transitions, 4613 flow [2023-11-29 02:11:33,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 269 transitions, 4143 flow, removed 19 selfloop flow, removed 27 redundant places. [2023-11-29 02:11:33,200 INFO L231 Difference]: Finished difference. Result has 244 places, 216 transitions, 3574 flow [2023-11-29 02:11:33,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3483, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3574, PETRI_PLACES=244, PETRI_TRANSITIONS=216} [2023-11-29 02:11:33,201 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 213 predicate places. [2023-11-29 02:11:33,201 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 216 transitions, 3574 flow [2023-11-29 02:11:33,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:33,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:11:33,201 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:11:33,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 02:11:33,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 02:11:33,402 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:11:33,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:11:33,402 INFO L85 PathProgramCache]: Analyzing trace with hash 432181422, now seen corresponding path program 21 times [2023-11-29 02:11:33,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:11:33,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428285754] [2023-11-29 02:11:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:11:33,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:11:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:34,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:11:34,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428285754] [2023-11-29 02:11:34,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428285754] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:11:34,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655318547] [2023-11-29 02:11:34,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:11:34,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:34,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:11:34,871 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:11:34,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 02:11:35,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:11:35,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:11:35,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:11:35,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:11:36,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:11:36,044 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 124 treesize of output 112 [2023-11-29 02:11:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:36,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:11:36,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:11:36,933 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 51 treesize of output 95 [2023-11-29 02:11:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:37,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655318547] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:11:37,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:11:37,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-29 02:11:37,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874939402] [2023-11-29 02:11:37,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:11:37,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:11:37,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:11:37,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:11:37,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:11:37,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:11:37,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 216 transitions, 3574 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:37,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:11:37,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:11:37,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:11:38,383 INFO L124 PetriNetUnfolderBase]: 1777/3550 cut-off events. [2023-11-29 02:11:38,383 INFO L125 PetriNetUnfolderBase]: For 34703/34703 co-relation queries the response was YES. [2023-11-29 02:11:38,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16682 conditions, 3550 events. 1777/3550 cut-off events. For 34703/34703 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25799 event pairs, 541 based on Foata normal form. 12/3558 useless extension candidates. Maximal degree in co-relation 16576. Up to 1242 conditions per place. [2023-11-29 02:11:38,410 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 164 selfloop transitions, 88 changer transitions 7/262 dead transitions. [2023-11-29 02:11:38,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 262 transitions, 4360 flow [2023-11-29 02:11:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:11:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 02:11:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2023-11-29 02:11:38,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35064935064935066 [2023-11-29 02:11:38,411 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 135 transitions. [2023-11-29 02:11:38,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 135 transitions. [2023-11-29 02:11:38,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:11:38,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 135 transitions. [2023-11-29 02:11:38,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:38,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:38,412 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:38,412 INFO L175 Difference]: Start difference. First operand has 244 places, 216 transitions, 3574 flow. Second operand 11 states and 135 transitions. [2023-11-29 02:11:38,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 262 transitions, 4360 flow [2023-11-29 02:11:38,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 262 transitions, 4182 flow, removed 23 selfloop flow, removed 9 redundant places. [2023-11-29 02:11:38,508 INFO L231 Difference]: Finished difference. Result has 239 places, 221 transitions, 3681 flow [2023-11-29 02:11:38,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3418, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3681, PETRI_PLACES=239, PETRI_TRANSITIONS=221} [2023-11-29 02:11:38,509 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 208 predicate places. [2023-11-29 02:11:38,509 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 221 transitions, 3681 flow [2023-11-29 02:11:38,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:38,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:11:38,509 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:11:38,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 02:11:38,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 02:11:38,710 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:11:38,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:11:38,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1375300438, now seen corresponding path program 22 times [2023-11-29 02:11:38,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:11:38,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420559349] [2023-11-29 02:11:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:11:38,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:11:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:40,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:11:40,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420559349] [2023-11-29 02:11:40,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420559349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:11:40,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963863708] [2023-11-29 02:11:40,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:11:40,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:40,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:11:40,235 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:11:40,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 02:11:40,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:11:40,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:11:40,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 02:11:40,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:11:41,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:11:41,191 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 157 treesize of output 137 [2023-11-29 02:11:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:41,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:11:42,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:11:42,572 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 51 treesize of output 95 [2023-11-29 02:11:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:42,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963863708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:11:42,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:11:42,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2023-11-29 02:11:42,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88374627] [2023-11-29 02:11:42,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:11:42,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:11:42,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:11:42,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:11:42,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:11:42,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:11:42,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 221 transitions, 3681 flow. Second operand has 21 states, 21 states have (on average 7.761904761904762) internal successors, (163), 21 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:42,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:11:42,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:11:42,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:11:45,094 INFO L124 PetriNetUnfolderBase]: 1977/3977 cut-off events. [2023-11-29 02:11:45,094 INFO L125 PetriNetUnfolderBase]: For 37216/37216 co-relation queries the response was YES. [2023-11-29 02:11:45,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18502 conditions, 3977 events. 1977/3977 cut-off events. For 37216/37216 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29555 event pairs, 271 based on Foata normal form. 22/3989 useless extension candidates. Maximal degree in co-relation 18397. Up to 782 conditions per place. [2023-11-29 02:11:45,124 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 192 selfloop transitions, 162 changer transitions 21/378 dead transitions. [2023-11-29 02:11:45,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 378 transitions, 5277 flow [2023-11-29 02:11:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 02:11:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 02:11:45,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 353 transitions. [2023-11-29 02:11:45,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3361904761904762 [2023-11-29 02:11:45,125 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 353 transitions. [2023-11-29 02:11:45,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 353 transitions. [2023-11-29 02:11:45,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:11:45,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 353 transitions. [2023-11-29 02:11:45,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 11.766666666666667) internal successors, (353), 30 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:45,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 35.0) internal successors, (1085), 31 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:45,127 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 35.0) internal successors, (1085), 31 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:45,127 INFO L175 Difference]: Start difference. First operand has 239 places, 221 transitions, 3681 flow. Second operand 30 states and 353 transitions. [2023-11-29 02:11:45,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 378 transitions, 5277 flow [2023-11-29 02:11:45,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 378 transitions, 5190 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-11-29 02:11:45,229 INFO L231 Difference]: Finished difference. Result has 271 places, 249 transitions, 4567 flow [2023-11-29 02:11:45,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3605, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4567, PETRI_PLACES=271, PETRI_TRANSITIONS=249} [2023-11-29 02:11:45,229 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 240 predicate places. [2023-11-29 02:11:45,229 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 249 transitions, 4567 flow [2023-11-29 02:11:45,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.761904761904762) internal successors, (163), 21 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:45,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:11:45,230 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:11:45,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 02:11:45,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:45,430 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:11:45,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:11:45,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1157114849, now seen corresponding path program 23 times [2023-11-29 02:11:45,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:11:45,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008167447] [2023-11-29 02:11:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:11:45,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:11:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:46,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:11:46,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008167447] [2023-11-29 02:11:46,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008167447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:11:46,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747383513] [2023-11-29 02:11:46,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:11:46,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:46,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:11:46,961 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:11:46,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 02:11:47,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:11:47,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:11:47,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 02:11:47,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:11:48,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:11:48,079 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 159 treesize of output 139 [2023-11-29 02:11:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:48,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:11:48,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:11:48,908 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 168 treesize of output 194 [2023-11-29 02:11:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:49,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747383513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:11:49,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:11:49,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-29 02:11:49,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122930533] [2023-11-29 02:11:49,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:11:49,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 02:11:49,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:11:49,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 02:11:49,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:11:49,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:11:49,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 249 transitions, 4567 flow. Second operand has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:49,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:11:49,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:11:49,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:11:50,869 INFO L124 PetriNetUnfolderBase]: 2041/4105 cut-off events. [2023-11-29 02:11:50,869 INFO L125 PetriNetUnfolderBase]: For 48053/48053 co-relation queries the response was YES. [2023-11-29 02:11:50,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20169 conditions, 4105 events. 2041/4105 cut-off events. For 48053/48053 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 31172 event pairs, 1217 based on Foata normal form. 10/4109 useless extension candidates. Maximal degree in co-relation 20056. Up to 3073 conditions per place. [2023-11-29 02:11:50,904 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 241 selfloop transitions, 44 changer transitions 6/294 dead transitions. [2023-11-29 02:11:50,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 294 transitions, 5416 flow [2023-11-29 02:11:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:11:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 02:11:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2023-11-29 02:11:50,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3742857142857143 [2023-11-29 02:11:50,906 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 131 transitions. [2023-11-29 02:11:50,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 131 transitions. [2023-11-29 02:11:50,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:11:50,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 131 transitions. [2023-11-29 02:11:50,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:50,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:50,907 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:50,907 INFO L175 Difference]: Start difference. First operand has 271 places, 249 transitions, 4567 flow. Second operand 10 states and 131 transitions. [2023-11-29 02:11:50,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 294 transitions, 5416 flow [2023-11-29 02:11:51,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 294 transitions, 5186 flow, removed 51 selfloop flow, removed 12 redundant places. [2023-11-29 02:11:51,141 INFO L231 Difference]: Finished difference. Result has 269 places, 251 transitions, 4496 flow [2023-11-29 02:11:51,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4342, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4496, PETRI_PLACES=269, PETRI_TRANSITIONS=251} [2023-11-29 02:11:51,142 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 238 predicate places. [2023-11-29 02:11:51,142 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 251 transitions, 4496 flow [2023-11-29 02:11:51,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:51,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:11:51,142 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:11:51,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 02:11:51,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:51,343 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:11:51,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:11:51,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1178842955, now seen corresponding path program 24 times [2023-11-29 02:11:51,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:11:51,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712788883] [2023-11-29 02:11:51,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:11:51,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:11:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:53,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:11:53,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712788883] [2023-11-29 02:11:53,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712788883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:11:53,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136916406] [2023-11-29 02:11:53,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:11:53,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:53,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:11:53,109 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:11:53,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 02:11:53,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 02:11:53,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:11:53,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 02:11:53,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:11:54,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:11:54,130 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 157 treesize of output 137 [2023-11-29 02:11:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:54,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:11:55,422 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:11:55,422 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 51 treesize of output 95 [2023-11-29 02:11:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:55,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136916406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:11:55,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:11:55,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-29 02:11:55,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967384541] [2023-11-29 02:11:55,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:11:55,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:11:55,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:11:55,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:11:55,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:11:55,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:11:55,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 251 transitions, 4496 flow. Second operand has 20 states, 20 states have (on average 8.05) internal successors, (161), 20 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:55,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:11:55,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:11:55,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:11:57,382 INFO L124 PetriNetUnfolderBase]: 2161/4358 cut-off events. [2023-11-29 02:11:57,382 INFO L125 PetriNetUnfolderBase]: For 48094/48094 co-relation queries the response was YES. [2023-11-29 02:11:57,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21301 conditions, 4358 events. 2161/4358 cut-off events. For 48094/48094 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 33293 event pairs, 707 based on Foata normal form. 10/4362 useless extension candidates. Maximal degree in co-relation 21188. Up to 1878 conditions per place. [2023-11-29 02:11:57,418 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 229 selfloop transitions, 94 changer transitions 8/334 dead transitions. [2023-11-29 02:11:57,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 334 transitions, 5776 flow [2023-11-29 02:11:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:11:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 02:11:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 185 transitions. [2023-11-29 02:11:57,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2023-11-29 02:11:57,419 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 185 transitions. [2023-11-29 02:11:57,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 185 transitions. [2023-11-29 02:11:57,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:11:57,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 185 transitions. [2023-11-29 02:11:57,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 13.214285714285714) internal successors, (185), 14 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:57,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 35.0) internal successors, (525), 15 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:57,421 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 35.0) internal successors, (525), 15 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:57,421 INFO L175 Difference]: Start difference. First operand has 269 places, 251 transitions, 4496 flow. Second operand 14 states and 185 transitions. [2023-11-29 02:11:57,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 334 transitions, 5776 flow [2023-11-29 02:11:57,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 334 transitions, 5694 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-11-29 02:11:57,585 INFO L231 Difference]: Finished difference. Result has 276 places, 259 transitions, 4833 flow [2023-11-29 02:11:57,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4414, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4833, PETRI_PLACES=276, PETRI_TRANSITIONS=259} [2023-11-29 02:11:57,586 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 245 predicate places. [2023-11-29 02:11:57,586 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 259 transitions, 4833 flow [2023-11-29 02:11:57,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.05) internal successors, (161), 20 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:57,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:11:57,586 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:11:57,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 02:11:57,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 02:11:57,787 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:11:57,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:11:57,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1519426507, now seen corresponding path program 25 times [2023-11-29 02:11:57,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:11:57,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911684677] [2023-11-29 02:11:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:11:57,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:11:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:11:59,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:11:59,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911684677] [2023-11-29 02:11:59,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911684677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:11:59,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462673297] [2023-11-29 02:11:59,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:11:59,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:59,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:11:59,604 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:11:59,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 02:11:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:59,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 02:11:59,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:12:00,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:12:00,674 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 122 treesize of output 106 [2023-11-29 02:12:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:00,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:12:01,499 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:12:01,499 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 164 treesize of output 177 [2023-11-29 02:12:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:02,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462673297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:12:02,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:12:02,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2023-11-29 02:12:02,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85549879] [2023-11-29 02:12:02,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:12:02,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:12:02,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:12:02,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:12:02,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:12:02,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:12:02,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 259 transitions, 4833 flow. Second operand has 21 states, 21 states have (on average 7.904761904761905) internal successors, (166), 21 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:02,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:12:02,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:12:02,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:12:05,243 INFO L124 PetriNetUnfolderBase]: 2205/4421 cut-off events. [2023-11-29 02:12:05,243 INFO L125 PetriNetUnfolderBase]: For 54400/54400 co-relation queries the response was YES. [2023-11-29 02:12:05,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22190 conditions, 4421 events. 2205/4421 cut-off events. For 54400/54400 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 33817 event pairs, 511 based on Foata normal form. 14/4413 useless extension candidates. Maximal degree in co-relation 22076. Up to 938 conditions per place. [2023-11-29 02:12:05,282 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 214 selfloop transitions, 154 changer transitions 18/389 dead transitions. [2023-11-29 02:12:05,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 389 transitions, 6428 flow [2023-11-29 02:12:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 02:12:05,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 02:12:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 311 transitions. [2023-11-29 02:12:05,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554285714285714 [2023-11-29 02:12:05,284 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 311 transitions. [2023-11-29 02:12:05,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 311 transitions. [2023-11-29 02:12:05,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:12:05,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 311 transitions. [2023-11-29 02:12:05,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 12.44) internal successors, (311), 25 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:05,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 35.0) internal successors, (910), 26 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:05,286 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 35.0) internal successors, (910), 26 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:05,286 INFO L175 Difference]: Start difference. First operand has 276 places, 259 transitions, 4833 flow. Second operand 25 states and 311 transitions. [2023-11-29 02:12:05,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 389 transitions, 6428 flow [2023-11-29 02:12:05,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 389 transitions, 6230 flow, removed 50 selfloop flow, removed 12 redundant places. [2023-11-29 02:12:05,466 INFO L231 Difference]: Finished difference. Result has 294 places, 269 transitions, 5244 flow [2023-11-29 02:12:05,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4606, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5244, PETRI_PLACES=294, PETRI_TRANSITIONS=269} [2023-11-29 02:12:05,467 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 263 predicate places. [2023-11-29 02:12:05,467 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 269 transitions, 5244 flow [2023-11-29 02:12:05,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.904761904761905) internal successors, (166), 21 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:05,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:12:05,468 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:12:05,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 02:12:05,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:05,668 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:12:05,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:12:05,669 INFO L85 PathProgramCache]: Analyzing trace with hash 680047433, now seen corresponding path program 26 times [2023-11-29 02:12:05,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:12:05,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431238915] [2023-11-29 02:12:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:05,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:12:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:07,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:12:07,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431238915] [2023-11-29 02:12:07,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431238915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:12:07,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991382517] [2023-11-29 02:12:07,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:12:07,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:07,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:12:07,267 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:12:07,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 02:12:07,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:12:07,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:12:07,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 02:12:07,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:12:08,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:12:08,353 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 124 treesize of output 108 [2023-11-29 02:12:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:08,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:12:09,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:12:09,201 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 168 treesize of output 194 [2023-11-29 02:12:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:09,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991382517] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:12:09,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:12:09,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2023-11-29 02:12:09,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638842227] [2023-11-29 02:12:09,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:12:09,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 02:12:09,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:12:09,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 02:12:09,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:12:09,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:12:09,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 269 transitions, 5244 flow. Second operand has 22 states, 22 states have (on average 7.590909090909091) internal successors, (167), 22 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:09,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:12:09,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:12:09,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:12:12,340 INFO L124 PetriNetUnfolderBase]: 2231/4488 cut-off events. [2023-11-29 02:12:12,340 INFO L125 PetriNetUnfolderBase]: For 58846/58846 co-relation queries the response was YES. [2023-11-29 02:12:12,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23199 conditions, 4488 events. 2231/4488 cut-off events. For 58846/58846 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 34200 event pairs, 397 based on Foata normal form. 4/4482 useless extension candidates. Maximal degree in co-relation 23085. Up to 1042 conditions per place. [2023-11-29 02:12:12,384 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 213 selfloop transitions, 144 changer transitions 21/381 dead transitions. [2023-11-29 02:12:12,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 381 transitions, 6510 flow [2023-11-29 02:12:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 02:12:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 02:12:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 302 transitions. [2023-11-29 02:12:12,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31957671957671957 [2023-11-29 02:12:12,386 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 302 transitions. [2023-11-29 02:12:12,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 302 transitions. [2023-11-29 02:12:12,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:12:12,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 302 transitions. [2023-11-29 02:12:12,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 11.185185185185185) internal successors, (302), 27 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:12,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 35.0) internal successors, (980), 28 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:12,389 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 35.0) internal successors, (980), 28 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:12,389 INFO L175 Difference]: Start difference. First operand has 294 places, 269 transitions, 5244 flow. Second operand 27 states and 302 transitions. [2023-11-29 02:12:12,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 381 transitions, 6510 flow [2023-11-29 02:12:12,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 381 transitions, 6163 flow, removed 67 selfloop flow, removed 18 redundant places. [2023-11-29 02:12:12,591 INFO L231 Difference]: Finished difference. Result has 302 places, 273 transitions, 5341 flow [2023-11-29 02:12:12,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4906, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5341, PETRI_PLACES=302, PETRI_TRANSITIONS=273} [2023-11-29 02:12:12,591 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 271 predicate places. [2023-11-29 02:12:12,591 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 273 transitions, 5341 flow [2023-11-29 02:12:12,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.590909090909091) internal successors, (167), 22 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:12,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:12:12,592 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:12:12,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 02:12:12,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 02:12:12,792 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:12:12,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:12:12,793 INFO L85 PathProgramCache]: Analyzing trace with hash -177815519, now seen corresponding path program 27 times [2023-11-29 02:12:12,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:12:12,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832220930] [2023-11-29 02:12:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:12,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:12:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:14,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:12:14,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832220930] [2023-11-29 02:12:14,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832220930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:12:14,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141673277] [2023-11-29 02:12:14,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:12:14,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:14,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:12:14,481 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:12:14,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 02:12:15,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:12:15,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:12:15,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 02:12:15,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:12:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:15,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:12:16,829 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:12:16,830 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 51 treesize of output 95 [2023-11-29 02:12:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:16,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141673277] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:12:16,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:12:16,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 22 [2023-11-29 02:12:16,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151646353] [2023-11-29 02:12:16,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:12:16,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 02:12:16,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:12:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 02:12:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:12:16,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:12:16,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 273 transitions, 5341 flow. Second operand has 22 states, 22 states have (on average 7.7727272727272725) internal successors, (171), 22 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:16,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:12:16,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:12:16,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:12:19,316 INFO L124 PetriNetUnfolderBase]: 2251/4529 cut-off events. [2023-11-29 02:12:19,316 INFO L125 PetriNetUnfolderBase]: For 60267/60267 co-relation queries the response was YES. [2023-11-29 02:12:19,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23518 conditions, 4529 events. 2251/4529 cut-off events. For 60267/60267 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 34962 event pairs, 393 based on Foata normal form. 32/4531 useless extension candidates. Maximal degree in co-relation 23405. Up to 1480 conditions per place. [2023-11-29 02:12:19,354 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 206 selfloop transitions, 153 changer transitions 14/376 dead transitions. [2023-11-29 02:12:19,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 376 transitions, 6595 flow [2023-11-29 02:12:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 02:12:19,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 02:12:19,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 258 transitions. [2023-11-29 02:12:19,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36857142857142855 [2023-11-29 02:12:19,355 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 258 transitions. [2023-11-29 02:12:19,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 258 transitions. [2023-11-29 02:12:19,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:12:19,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 258 transitions. [2023-11-29 02:12:19,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 12.9) internal successors, (258), 20 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:19,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 35.0) internal successors, (735), 21 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:19,358 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 35.0) internal successors, (735), 21 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:19,358 INFO L175 Difference]: Start difference. First operand has 302 places, 273 transitions, 5341 flow. Second operand 20 states and 258 transitions. [2023-11-29 02:12:19,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 376 transitions, 6595 flow [2023-11-29 02:12:19,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 376 transitions, 6447 flow, removed 4 selfloop flow, removed 18 redundant places. [2023-11-29 02:12:19,556 INFO L231 Difference]: Finished difference. Result has 304 places, 282 transitions, 5733 flow [2023-11-29 02:12:19,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5120, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5733, PETRI_PLACES=304, PETRI_TRANSITIONS=282} [2023-11-29 02:12:19,557 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 273 predicate places. [2023-11-29 02:12:19,557 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 282 transitions, 5733 flow [2023-11-29 02:12:19,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.7727272727272725) internal successors, (171), 22 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:19,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:12:19,558 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:12:19,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 02:12:19,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:19,758 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:12:19,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:12:19,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1245371657, now seen corresponding path program 28 times [2023-11-29 02:12:19,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:12:19,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895034349] [2023-11-29 02:12:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:19,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:12:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:21,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:12:21,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895034349] [2023-11-29 02:12:21,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895034349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:12:21,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002758620] [2023-11-29 02:12:21,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:12:21,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:21,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:12:21,303 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:12:21,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 02:12:21,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:12:21,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:12:21,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 02:12:21,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:12:22,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:12:22,563 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 162 treesize of output 146 [2023-11-29 02:12:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:22,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:12:23,502 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:12:23,503 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 206 treesize of output 226 [2023-11-29 02:12:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:24,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002758620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:12:24,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:12:24,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2023-11-29 02:12:24,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181201340] [2023-11-29 02:12:24,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:12:24,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:12:24,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:12:24,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:12:24,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:12:24,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:12:24,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 282 transitions, 5733 flow. Second operand has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:24,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:12:24,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:12:24,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:12:25,932 INFO L124 PetriNetUnfolderBase]: 2217/4413 cut-off events. [2023-11-29 02:12:25,932 INFO L125 PetriNetUnfolderBase]: For 64008/64008 co-relation queries the response was YES. [2023-11-29 02:12:25,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23625 conditions, 4413 events. 2217/4413 cut-off events. For 64008/64008 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 33595 event pairs, 465 based on Foata normal form. 4/4407 useless extension candidates. Maximal degree in co-relation 23511. Up to 1260 conditions per place. [2023-11-29 02:12:25,991 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 184 selfloop transitions, 133 changer transitions 18/338 dead transitions. [2023-11-29 02:12:25,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 338 transitions, 6501 flow [2023-11-29 02:12:25,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:12:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 02:12:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 198 transitions. [2023-11-29 02:12:25,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3142857142857143 [2023-11-29 02:12:25,993 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 198 transitions. [2023-11-29 02:12:25,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 198 transitions. [2023-11-29 02:12:25,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:12:25,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 198 transitions. [2023-11-29 02:12:25,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 11.0) internal successors, (198), 18 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:25,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:25,995 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:25,995 INFO L175 Difference]: Start difference. First operand has 304 places, 282 transitions, 5733 flow. Second operand 18 states and 198 transitions. [2023-11-29 02:12:25,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 338 transitions, 6501 flow [2023-11-29 02:12:26,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 338 transitions, 6345 flow, removed 13 selfloop flow, removed 9 redundant places. [2023-11-29 02:12:26,209 INFO L231 Difference]: Finished difference. Result has 312 places, 277 transitions, 5728 flow [2023-11-29 02:12:26,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5498, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5728, PETRI_PLACES=312, PETRI_TRANSITIONS=277} [2023-11-29 02:12:26,210 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 281 predicate places. [2023-11-29 02:12:26,210 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 277 transitions, 5728 flow [2023-11-29 02:12:26,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:26,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:12:26,210 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:12:26,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 02:12:26,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:26,411 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:12:26,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:12:26,411 INFO L85 PathProgramCache]: Analyzing trace with hash -77196821, now seen corresponding path program 29 times [2023-11-29 02:12:26,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:12:26,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220411489] [2023-11-29 02:12:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:26,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:12:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:28,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:12:28,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220411489] [2023-11-29 02:12:28,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220411489] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:12:28,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027528943] [2023-11-29 02:12:28,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:12:28,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:28,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:12:28,109 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:12:28,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 02:12:28,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:12:28,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:12:28,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 02:12:28,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:12:29,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:12:29,009 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 157 treesize of output 137 [2023-11-29 02:12:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:29,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:12:30,102 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:12:30,102 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 51 treesize of output 95 [2023-11-29 02:12:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:30,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027528943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:12:30,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:12:30,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-29 02:12:30,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723983963] [2023-11-29 02:12:30,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:12:30,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:12:30,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:12:30,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:12:30,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:12:30,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:12:30,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 277 transitions, 5728 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:30,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:12:30,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:12:30,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:12:32,069 INFO L124 PetriNetUnfolderBase]: 2161/4341 cut-off events. [2023-11-29 02:12:32,069 INFO L125 PetriNetUnfolderBase]: For 63800/63800 co-relation queries the response was YES. [2023-11-29 02:12:32,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23465 conditions, 4341 events. 2161/4341 cut-off events. For 63800/63800 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 33329 event pairs, 757 based on Foata normal form. 4/4339 useless extension candidates. Maximal degree in co-relation 23352. Up to 2342 conditions per place. [2023-11-29 02:12:32,105 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 204 selfloop transitions, 110 changer transitions 17/334 dead transitions. [2023-11-29 02:12:32,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 334 transitions, 6647 flow [2023-11-29 02:12:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:12:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 02:12:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 163 transitions. [2023-11-29 02:12:32,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35824175824175825 [2023-11-29 02:12:32,106 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 163 transitions. [2023-11-29 02:12:32,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 163 transitions. [2023-11-29 02:12:32,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:12:32,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 163 transitions. [2023-11-29 02:12:32,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 12.538461538461538) internal successors, (163), 13 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:32,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 35.0) internal successors, (490), 14 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:32,108 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 35.0) internal successors, (490), 14 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:32,108 INFO L175 Difference]: Start difference. First operand has 312 places, 277 transitions, 5728 flow. Second operand 13 states and 163 transitions. [2023-11-29 02:12:32,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 334 transitions, 6647 flow [2023-11-29 02:12:32,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 334 transitions, 6302 flow, removed 7 selfloop flow, removed 15 redundant places. [2023-11-29 02:12:32,279 INFO L231 Difference]: Finished difference. Result has 303 places, 276 transitions, 5620 flow [2023-11-29 02:12:32,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5362, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5620, PETRI_PLACES=303, PETRI_TRANSITIONS=276} [2023-11-29 02:12:32,279 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 272 predicate places. [2023-11-29 02:12:32,279 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 276 transitions, 5620 flow [2023-11-29 02:12:32,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:32,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:12:32,280 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:12:32,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 02:12:32,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:32,480 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:12:32,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:12:32,481 INFO L85 PathProgramCache]: Analyzing trace with hash 858284299, now seen corresponding path program 30 times [2023-11-29 02:12:32,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:12:32,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531589600] [2023-11-29 02:12:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:32,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:12:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:34,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:12:34,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531589600] [2023-11-29 02:12:34,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531589600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:12:34,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528943495] [2023-11-29 02:12:34,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:12:34,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:34,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:12:34,223 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:12:34,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 02:12:34,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 02:12:34,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:12:34,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 02:12:34,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:12:35,580 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:12:35,580 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 184 treesize of output 156 [2023-11-29 02:12:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:35,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:12:36,437 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:12:36,437 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 164 treesize of output 177 [2023-11-29 02:12:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:36,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528943495] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:12:36,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:12:36,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-29 02:12:36,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498398596] [2023-11-29 02:12:36,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:12:36,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:12:36,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:12:36,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:12:36,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:12:36,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:12:36,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 276 transitions, 5620 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:36,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:12:36,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:12:36,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:12:39,159 INFO L124 PetriNetUnfolderBase]: 2121/4222 cut-off events. [2023-11-29 02:12:39,159 INFO L125 PetriNetUnfolderBase]: For 59763/59763 co-relation queries the response was YES. [2023-11-29 02:12:39,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22626 conditions, 4222 events. 2121/4222 cut-off events. For 59763/59763 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 32103 event pairs, 615 based on Foata normal form. 4/4220 useless extension candidates. Maximal degree in co-relation 22514. Up to 1038 conditions per place. [2023-11-29 02:12:39,196 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 204 selfloop transitions, 128 changer transitions 12/347 dead transitions. [2023-11-29 02:12:39,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 347 transitions, 6624 flow [2023-11-29 02:12:39,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:12:39,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 02:12:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 201 transitions. [2023-11-29 02:12:39,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35892857142857143 [2023-11-29 02:12:39,198 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 201 transitions. [2023-11-29 02:12:39,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 201 transitions. [2023-11-29 02:12:39,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:12:39,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 201 transitions. [2023-11-29 02:12:39,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.5625) internal successors, (201), 16 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:39,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 35.0) internal successors, (595), 17 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:39,199 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 35.0) internal successors, (595), 17 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:39,199 INFO L175 Difference]: Start difference. First operand has 303 places, 276 transitions, 5620 flow. Second operand 16 states and 201 transitions. [2023-11-29 02:12:39,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 347 transitions, 6624 flow [2023-11-29 02:12:39,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 347 transitions, 6283 flow, removed 9 selfloop flow, removed 12 redundant places. [2023-11-29 02:12:39,372 INFO L231 Difference]: Finished difference. Result has 304 places, 273 transitions, 5488 flow [2023-11-29 02:12:39,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5251, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5488, PETRI_PLACES=304, PETRI_TRANSITIONS=273} [2023-11-29 02:12:39,373 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 273 predicate places. [2023-11-29 02:12:39,373 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 273 transitions, 5488 flow [2023-11-29 02:12:39,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:39,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:12:39,373 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:12:39,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 02:12:39,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:39,574 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:12:39,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:12:39,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1423608523, now seen corresponding path program 31 times [2023-11-29 02:12:39,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:12:39,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063189846] [2023-11-29 02:12:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:39,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:12:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:41,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:12:41,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063189846] [2023-11-29 02:12:41,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063189846] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:12:41,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623408989] [2023-11-29 02:12:41,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:12:41,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:41,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:12:41,157 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:12:41,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 02:12:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:41,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 02:12:41,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:12:42,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:12:42,382 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 107 treesize of output 91 [2023-11-29 02:12:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:42,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:12:43,212 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:12:43,212 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 202 treesize of output 209 [2023-11-29 02:12:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:43,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623408989] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:12:43,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:12:43,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-11-29 02:12:43,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396957622] [2023-11-29 02:12:43,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:12:43,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:12:43,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:12:43,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:12:43,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:12:43,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:12:43,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 273 transitions, 5488 flow. Second operand has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:43,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:12:43,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:12:43,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:12:46,064 INFO L124 PetriNetUnfolderBase]: 2109/4179 cut-off events. [2023-11-29 02:12:46,064 INFO L125 PetriNetUnfolderBase]: For 57423/57423 co-relation queries the response was YES. [2023-11-29 02:12:46,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22339 conditions, 4179 events. 2109/4179 cut-off events. For 57423/57423 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 31448 event pairs, 301 based on Foata normal form. 4/4175 useless extension candidates. Maximal degree in co-relation 22228. Up to 718 conditions per place. [2023-11-29 02:12:46,100 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 142 selfloop transitions, 184 changer transitions 22/351 dead transitions. [2023-11-29 02:12:46,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 351 transitions, 6474 flow [2023-11-29 02:12:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:12:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 02:12:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 244 transitions. [2023-11-29 02:12:46,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3168831168831169 [2023-11-29 02:12:46,101 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 244 transitions. [2023-11-29 02:12:46,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 244 transitions. [2023-11-29 02:12:46,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:12:46,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 244 transitions. [2023-11-29 02:12:46,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 11.090909090909092) internal successors, (244), 22 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:46,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 35.0) internal successors, (805), 23 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:46,102 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 35.0) internal successors, (805), 23 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:46,102 INFO L175 Difference]: Start difference. First operand has 304 places, 273 transitions, 5488 flow. Second operand 22 states and 244 transitions. [2023-11-29 02:12:46,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 351 transitions, 6474 flow [2023-11-29 02:12:46,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 351 transitions, 6235 flow, removed 3 selfloop flow, removed 13 redundant places. [2023-11-29 02:12:46,260 INFO L231 Difference]: Finished difference. Result has 310 places, 272 transitions, 5620 flow [2023-11-29 02:12:46,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5229, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5620, PETRI_PLACES=310, PETRI_TRANSITIONS=272} [2023-11-29 02:12:46,260 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 279 predicate places. [2023-11-29 02:12:46,260 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 272 transitions, 5620 flow [2023-11-29 02:12:46,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:46,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:12:46,261 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:12:46,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 02:12:46,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:46,461 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:12:46,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:12:46,462 INFO L85 PathProgramCache]: Analyzing trace with hash -131617887, now seen corresponding path program 32 times [2023-11-29 02:12:46,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:12:46,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430712448] [2023-11-29 02:12:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:46,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:12:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:48,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:12:48,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430712448] [2023-11-29 02:12:48,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430712448] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:12:48,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425416960] [2023-11-29 02:12:48,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:12:48,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:48,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:12:48,175 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:12:48,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 02:12:48,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:12:48,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:12:48,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 02:12:48,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:12:49,261 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:12:49,261 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 92 treesize of output 84 [2023-11-29 02:12:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:49,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:12:50,038 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:12:50,038 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 164 treesize of output 177 [2023-11-29 02:12:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:50,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425416960] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:12:50,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:12:50,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2023-11-29 02:12:50,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014537254] [2023-11-29 02:12:50,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:12:50,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:12:50,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:12:50,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:12:50,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:12:50,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:12:50,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 272 transitions, 5620 flow. Second operand has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:50,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:12:50,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:12:50,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:12:52,558 INFO L124 PetriNetUnfolderBase]: 2059/4070 cut-off events. [2023-11-29 02:12:52,558 INFO L125 PetriNetUnfolderBase]: For 58240/58240 co-relation queries the response was YES. [2023-11-29 02:12:52,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22203 conditions, 4070 events. 2059/4070 cut-off events. For 58240/58240 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 30399 event pairs, 289 based on Foata normal form. 4/4066 useless extension candidates. Maximal degree in co-relation 22093. Up to 718 conditions per place. [2023-11-29 02:12:52,600 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 135 selfloop transitions, 179 changer transitions 19/336 dead transitions. [2023-11-29 02:12:52,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 336 transitions, 6430 flow [2023-11-29 02:12:52,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 02:12:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 02:12:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 214 transitions. [2023-11-29 02:12:52,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3218045112781955 [2023-11-29 02:12:52,601 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 214 transitions. [2023-11-29 02:12:52,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 214 transitions. [2023-11-29 02:12:52,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:12:52,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 214 transitions. [2023-11-29 02:12:52,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 11.263157894736842) internal successors, (214), 19 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:52,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:52,603 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:52,603 INFO L175 Difference]: Start difference. First operand has 310 places, 272 transitions, 5620 flow. Second operand 19 states and 214 transitions. [2023-11-29 02:12:52,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 336 transitions, 6430 flow [2023-11-29 02:12:52,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 336 transitions, 6265 flow, removed 12 selfloop flow, removed 17 redundant places. [2023-11-29 02:12:52,767 INFO L231 Difference]: Finished difference. Result has 305 places, 265 transitions, 5653 flow [2023-11-29 02:12:52,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5373, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5653, PETRI_PLACES=305, PETRI_TRANSITIONS=265} [2023-11-29 02:12:52,768 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 274 predicate places. [2023-11-29 02:12:52,768 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 265 transitions, 5653 flow [2023-11-29 02:12:52,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:52,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:12:52,768 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:12:52,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 02:12:52,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:52,969 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:12:52,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:12:52,969 INFO L85 PathProgramCache]: Analyzing trace with hash 690430354, now seen corresponding path program 33 times [2023-11-29 02:12:52,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:12:52,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317960087] [2023-11-29 02:12:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:52,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:12:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:54,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:12:54,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317960087] [2023-11-29 02:12:54,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317960087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:12:54,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663420176] [2023-11-29 02:12:54,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:12:54,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:54,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:12:54,915 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:12:54,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 02:12:55,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:12:55,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:12:55,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 02:12:55,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:12:55,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:12:55,992 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 161 treesize of output 133 [2023-11-29 02:12:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:56,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:12:56,832 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:12:56,832 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 44 treesize of output 75 [2023-11-29 02:12:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:12:56,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663420176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:12:56,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:12:56,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-29 02:12:56,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010184251] [2023-11-29 02:12:56,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:12:56,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 02:12:56,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:12:56,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 02:12:56,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:12:56,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:12:56,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 265 transitions, 5653 flow. Second operand has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 18 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:56,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:12:56,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:12:56,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:12:58,946 INFO L124 PetriNetUnfolderBase]: 2105/4181 cut-off events. [2023-11-29 02:12:58,946 INFO L125 PetriNetUnfolderBase]: For 62652/62652 co-relation queries the response was YES. [2023-11-29 02:12:58,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23131 conditions, 4181 events. 2105/4181 cut-off events. For 62652/62652 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 31469 event pairs, 201 based on Foata normal form. 16/4193 useless extension candidates. Maximal degree in co-relation 23033. Up to 872 conditions per place. [2023-11-29 02:12:58,979 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 158 selfloop transitions, 167 changer transitions 11/339 dead transitions. [2023-11-29 02:12:58,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 339 transitions, 6833 flow [2023-11-29 02:12:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:12:58,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 02:12:58,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 189 transitions. [2023-11-29 02:12:58,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3375 [2023-11-29 02:12:58,981 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 189 transitions. [2023-11-29 02:12:58,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 189 transitions. [2023-11-29 02:12:58,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:12:58,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 189 transitions. [2023-11-29 02:12:58,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:58,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 35.0) internal successors, (595), 17 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:58,982 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 35.0) internal successors, (595), 17 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:58,982 INFO L175 Difference]: Start difference. First operand has 305 places, 265 transitions, 5653 flow. Second operand 16 states and 189 transitions. [2023-11-29 02:12:58,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 339 transitions, 6833 flow [2023-11-29 02:12:59,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 339 transitions, 6468 flow, removed 2 selfloop flow, removed 19 redundant places. [2023-11-29 02:12:59,122 INFO L231 Difference]: Finished difference. Result has 298 places, 273 transitions, 5828 flow [2023-11-29 02:12:59,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5283, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5828, PETRI_PLACES=298, PETRI_TRANSITIONS=273} [2023-11-29 02:12:59,122 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 267 predicate places. [2023-11-29 02:12:59,122 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 273 transitions, 5828 flow [2023-11-29 02:12:59,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 18 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:59,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:12:59,123 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:12:59,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-29 02:12:59,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:59,323 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:12:59,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:12:59,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1054471810, now seen corresponding path program 34 times [2023-11-29 02:12:59,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:12:59,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706975234] [2023-11-29 02:12:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:59,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:12:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:00,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:13:00,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706975234] [2023-11-29 02:13:00,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706975234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:13:00,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030765035] [2023-11-29 02:13:00,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:13:00,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:13:00,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:13:00,793 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:13:00,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 02:13:01,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:13:01,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:13:01,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:13:01,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:13:01,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:01,691 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 157 treesize of output 137 [2023-11-29 02:13:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:02,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:13:02,722 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:02,723 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 51 treesize of output 95 [2023-11-29 02:13:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:02,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030765035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:13:02,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:13:02,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2023-11-29 02:13:02,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841356556] [2023-11-29 02:13:02,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:13:02,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:13:02,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:13:02,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:13:02,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:13:02,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:13:02,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 273 transitions, 5828 flow. Second operand has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:02,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:13:02,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:13:02,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:13:04,965 INFO L124 PetriNetUnfolderBase]: 2285/4505 cut-off events. [2023-11-29 02:13:04,965 INFO L125 PetriNetUnfolderBase]: For 67957/67957 co-relation queries the response was YES. [2023-11-29 02:13:05,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24760 conditions, 4505 events. 2285/4505 cut-off events. For 67957/67957 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 34452 event pairs, 827 based on Foata normal form. 8/4499 useless extension candidates. Maximal degree in co-relation 24657. Up to 2060 conditions per place. [2023-11-29 02:13:05,017 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 247 selfloop transitions, 111 changer transitions 11/372 dead transitions. [2023-11-29 02:13:05,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 372 transitions, 7267 flow [2023-11-29 02:13:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 02:13:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 02:13:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 231 transitions. [2023-11-29 02:13:05,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3473684210526316 [2023-11-29 02:13:05,019 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 231 transitions. [2023-11-29 02:13:05,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 231 transitions. [2023-11-29 02:13:05,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:13:05,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 231 transitions. [2023-11-29 02:13:05,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.157894736842104) internal successors, (231), 19 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:05,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:05,021 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:05,021 INFO L175 Difference]: Start difference. First operand has 298 places, 273 transitions, 5828 flow. Second operand 19 states and 231 transitions. [2023-11-29 02:13:05,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 372 transitions, 7267 flow [2023-11-29 02:13:05,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 372 transitions, 7053 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-11-29 02:13:05,192 INFO L231 Difference]: Finished difference. Result has 314 places, 292 transitions, 6408 flow [2023-11-29 02:13:05,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5614, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6408, PETRI_PLACES=314, PETRI_TRANSITIONS=292} [2023-11-29 02:13:05,193 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 283 predicate places. [2023-11-29 02:13:05,193 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 292 transitions, 6408 flow [2023-11-29 02:13:05,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:05,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:13:05,194 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:13:05,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 02:13:05,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:13:05,394 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:13:05,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:13:05,395 INFO L85 PathProgramCache]: Analyzing trace with hash 170539266, now seen corresponding path program 35 times [2023-11-29 02:13:05,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:13:05,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591914617] [2023-11-29 02:13:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:13:05,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:13:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:06,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:13:06,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591914617] [2023-11-29 02:13:06,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591914617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:13:06,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875883126] [2023-11-29 02:13:06,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:13:06,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:13:06,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:13:06,958 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:13:06,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 02:13:07,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:13:07,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:13:07,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 02:13:07,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:13:08,146 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:08,147 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 159 treesize of output 139 [2023-11-29 02:13:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:08,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:13:08,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:08,965 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 168 treesize of output 194 [2023-11-29 02:13:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:09,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875883126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:13:09,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:13:09,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-29 02:13:09,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49802135] [2023-11-29 02:13:09,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:13:09,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:13:09,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:13:09,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:13:09,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:13:09,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:13:09,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 292 transitions, 6408 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:09,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:13:09,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:13:09,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:13:11,699 INFO L124 PetriNetUnfolderBase]: 2357/4665 cut-off events. [2023-11-29 02:13:11,699 INFO L125 PetriNetUnfolderBase]: For 71945/71945 co-relation queries the response was YES. [2023-11-29 02:13:11,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26036 conditions, 4665 events. 2357/4665 cut-off events. For 71945/71945 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 35955 event pairs, 859 based on Foata normal form. 8/4659 useless extension candidates. Maximal degree in co-relation 25926. Up to 2170 conditions per place. [2023-11-29 02:13:11,742 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 244 selfloop transitions, 120 changer transitions 13/380 dead transitions. [2023-11-29 02:13:11,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 380 transitions, 7551 flow [2023-11-29 02:13:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:13:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 02:13:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 226 transitions. [2023-11-29 02:13:11,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35873015873015873 [2023-11-29 02:13:11,744 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 226 transitions. [2023-11-29 02:13:11,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 226 transitions. [2023-11-29 02:13:11,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:13:11,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 226 transitions. [2023-11-29 02:13:11,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 12.555555555555555) internal successors, (226), 18 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:11,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:11,745 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:11,745 INFO L175 Difference]: Start difference. First operand has 314 places, 292 transitions, 6408 flow. Second operand 18 states and 226 transitions. [2023-11-29 02:13:11,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 380 transitions, 7551 flow [2023-11-29 02:13:11,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 380 transitions, 7403 flow, removed 23 selfloop flow, removed 8 redundant places. [2023-11-29 02:13:11,922 INFO L231 Difference]: Finished difference. Result has 325 places, 297 transitions, 6682 flow [2023-11-29 02:13:11,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6268, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6682, PETRI_PLACES=325, PETRI_TRANSITIONS=297} [2023-11-29 02:13:11,923 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 294 predicate places. [2023-11-29 02:13:11,923 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 297 transitions, 6682 flow [2023-11-29 02:13:11,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:11,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:13:11,923 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:13:11,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 02:13:12,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-29 02:13:12,124 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:13:12,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:13:12,124 INFO L85 PathProgramCache]: Analyzing trace with hash -967801812, now seen corresponding path program 36 times [2023-11-29 02:13:12,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:13:12,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971725698] [2023-11-29 02:13:12,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:13:12,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:13:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:13:14,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:13:14,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971725698] [2023-11-29 02:13:14,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971725698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:13:14,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402615436] [2023-11-29 02:13:14,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:13:14,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:13:14,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:13:14,146 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:13:14,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 02:13:14,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 02:13:14,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:13:14,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 02:13:14,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:13:15,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:15,301 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 157 treesize of output 137 [2023-11-29 02:13:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:15,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:13:16,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:16,533 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 51 treesize of output 95 [2023-11-29 02:13:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:16,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402615436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:13:16,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:13:16,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 8] total 28 [2023-11-29 02:13:16,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655930138] [2023-11-29 02:13:16,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:13:16,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 02:13:16,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:13:16,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 02:13:16,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:13:16,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:13:16,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 297 transitions, 6682 flow. Second operand has 28 states, 28 states have (on average 7.392857142857143) internal successors, (207), 28 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:16,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:13:16,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:13:16,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:13:18,740 INFO L124 PetriNetUnfolderBase]: 2249/4422 cut-off events. [2023-11-29 02:13:18,740 INFO L125 PetriNetUnfolderBase]: For 72506/72506 co-relation queries the response was YES. [2023-11-29 02:13:18,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25240 conditions, 4422 events. 2249/4422 cut-off events. For 72506/72506 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 33890 event pairs, 961 based on Foata normal form. 12/4408 useless extension candidates. Maximal degree in co-relation 25128. Up to 2180 conditions per place. [2023-11-29 02:13:18,781 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 232 selfloop transitions, 97 changer transitions 15/347 dead transitions. [2023-11-29 02:13:18,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 347 transitions, 7385 flow [2023-11-29 02:13:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:13:18,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 02:13:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 199 transitions. [2023-11-29 02:13:18,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31587301587301586 [2023-11-29 02:13:18,782 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 199 transitions. [2023-11-29 02:13:18,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 199 transitions. [2023-11-29 02:13:18,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:13:18,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 199 transitions. [2023-11-29 02:13:18,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 11.055555555555555) internal successors, (199), 18 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:18,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:18,784 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:18,784 INFO L175 Difference]: Start difference. First operand has 325 places, 297 transitions, 6682 flow. Second operand 18 states and 199 transitions. [2023-11-29 02:13:18,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 347 transitions, 7385 flow [2023-11-29 02:13:18,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 347 transitions, 7288 flow, removed 3 selfloop flow, removed 11 redundant places. [2023-11-29 02:13:19,006 INFO L231 Difference]: Finished difference. Result has 331 places, 290 transitions, 6562 flow [2023-11-29 02:13:19,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6401, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6562, PETRI_PLACES=331, PETRI_TRANSITIONS=290} [2023-11-29 02:13:19,006 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 300 predicate places. [2023-11-29 02:13:19,007 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 290 transitions, 6562 flow [2023-11-29 02:13:19,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.392857142857143) internal successors, (207), 28 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:19,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:13:19,007 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:13:19,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 02:13:19,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-29 02:13:19,207 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:13:19,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:13:19,208 INFO L85 PathProgramCache]: Analyzing trace with hash -154245296, now seen corresponding path program 37 times [2023-11-29 02:13:19,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:13:19,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194889826] [2023-11-29 02:13:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:13:19,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:13:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:20,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:13:20,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194889826] [2023-11-29 02:13:20,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194889826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:13:20,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377871943] [2023-11-29 02:13:20,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:13:20,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:13:20,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:13:20,678 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:13:20,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 02:13:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:21,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 02:13:21,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:13:21,795 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:21,796 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 159 treesize of output 143 [2023-11-29 02:13:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:21,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:13:22,853 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:22,854 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 51 treesize of output 95 [2023-11-29 02:13:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:22,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377871943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:13:22,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:13:22,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 22 [2023-11-29 02:13:22,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563117079] [2023-11-29 02:13:22,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:13:22,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 02:13:22,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:13:22,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 02:13:22,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:13:22,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:13:22,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 290 transitions, 6562 flow. Second operand has 22 states, 22 states have (on average 7.590909090909091) internal successors, (167), 22 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:22,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:13:22,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:13:22,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:13:25,297 INFO L124 PetriNetUnfolderBase]: 2283/4465 cut-off events. [2023-11-29 02:13:25,297 INFO L125 PetriNetUnfolderBase]: For 77264/77264 co-relation queries the response was YES. [2023-11-29 02:13:25,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25787 conditions, 4465 events. 2283/4465 cut-off events. For 77264/77264 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34073 event pairs, 893 based on Foata normal form. 24/4475 useless extension candidates. Maximal degree in co-relation 25668. Up to 2172 conditions per place. [2023-11-29 02:13:25,347 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 235 selfloop transitions, 113 changer transitions 18/369 dead transitions. [2023-11-29 02:13:25,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 369 transitions, 7651 flow [2023-11-29 02:13:25,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 02:13:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 02:13:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 237 transitions. [2023-11-29 02:13:25,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3224489795918367 [2023-11-29 02:13:25,349 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 237 transitions. [2023-11-29 02:13:25,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 237 transitions. [2023-11-29 02:13:25,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:13:25,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 237 transitions. [2023-11-29 02:13:25,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 11.285714285714286) internal successors, (237), 21 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:25,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:25,351 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:25,351 INFO L175 Difference]: Start difference. First operand has 331 places, 290 transitions, 6562 flow. Second operand 21 states and 237 transitions. [2023-11-29 02:13:25,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 369 transitions, 7651 flow [2023-11-29 02:13:25,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 369 transitions, 7455 flow, removed 4 selfloop flow, removed 16 redundant places. [2023-11-29 02:13:25,606 INFO L231 Difference]: Finished difference. Result has 334 places, 298 transitions, 6774 flow [2023-11-29 02:13:25,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6249, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6774, PETRI_PLACES=334, PETRI_TRANSITIONS=298} [2023-11-29 02:13:25,607 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 303 predicate places. [2023-11-29 02:13:25,607 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 298 transitions, 6774 flow [2023-11-29 02:13:25,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.590909090909091) internal successors, (167), 22 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:25,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:13:25,607 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:13:25,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-29 02:13:25,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 02:13:25,808 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:13:25,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:13:25,808 INFO L85 PathProgramCache]: Analyzing trace with hash 860472540, now seen corresponding path program 38 times [2023-11-29 02:13:25,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:13:25,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756139789] [2023-11-29 02:13:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:13:25,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:13:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:27,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:13:27,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756139789] [2023-11-29 02:13:27,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756139789] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:13:27,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207722183] [2023-11-29 02:13:27,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:13:27,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:13:27,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:13:27,581 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:13:27,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 02:13:28,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:13:28,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:13:28,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:13:28,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:13:28,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:28,704 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 124 treesize of output 108 [2023-11-29 02:13:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:28,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:13:29,394 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:29,394 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 168 treesize of output 194 [2023-11-29 02:13:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:29,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207722183] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:13:29,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:13:29,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-29 02:13:29,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593053273] [2023-11-29 02:13:29,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:13:29,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:13:29,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:13:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:13:29,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:13:29,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:13:29,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 298 transitions, 6774 flow. Second operand has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:29,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:13:29,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:13:29,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:13:31,991 INFO L124 PetriNetUnfolderBase]: 2229/4364 cut-off events. [2023-11-29 02:13:31,991 INFO L125 PetriNetUnfolderBase]: For 75275/75275 co-relation queries the response was YES. [2023-11-29 02:13:32,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25375 conditions, 4364 events. 2229/4364 cut-off events. For 75275/75275 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 33360 event pairs, 843 based on Foata normal form. 6/4344 useless extension candidates. Maximal degree in co-relation 25264. Up to 2114 conditions per place. [2023-11-29 02:13:32,028 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 241 selfloop transitions, 110 changer transitions 14/368 dead transitions. [2023-11-29 02:13:32,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 368 transitions, 7648 flow [2023-11-29 02:13:32,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:13:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 02:13:32,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 193 transitions. [2023-11-29 02:13:32,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3676190476190476 [2023-11-29 02:13:32,029 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 193 transitions. [2023-11-29 02:13:32,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 193 transitions. [2023-11-29 02:13:32,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:13:32,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 193 transitions. [2023-11-29 02:13:32,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 12.866666666666667) internal successors, (193), 15 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:32,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:32,030 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:32,030 INFO L175 Difference]: Start difference. First operand has 334 places, 298 transitions, 6774 flow. Second operand 15 states and 193 transitions. [2023-11-29 02:13:32,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 368 transitions, 7648 flow [2023-11-29 02:13:32,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 368 transitions, 7570 flow, removed 11 selfloop flow, removed 10 redundant places. [2023-11-29 02:13:32,204 INFO L231 Difference]: Finished difference. Result has 338 places, 294 transitions, 6780 flow [2023-11-29 02:13:32,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6589, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6780, PETRI_PLACES=338, PETRI_TRANSITIONS=294} [2023-11-29 02:13:32,205 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 307 predicate places. [2023-11-29 02:13:32,205 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 294 transitions, 6780 flow [2023-11-29 02:13:32,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:32,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:13:32,205 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:13:32,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 02:13:32,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 02:13:32,406 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:13:32,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:13:32,406 INFO L85 PathProgramCache]: Analyzing trace with hash 2096803480, now seen corresponding path program 39 times [2023-11-29 02:13:32,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:13:32,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326209718] [2023-11-29 02:13:32,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:13:32,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:13:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:33,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:13:33,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326209718] [2023-11-29 02:13:33,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326209718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:13:33,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428895122] [2023-11-29 02:13:33,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:13:33,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:13:33,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:13:33,889 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:13:33,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 02:13:34,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:13:34,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:13:34,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:13:34,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:13:35,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:35,154 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 92 treesize of output 84 [2023-11-29 02:13:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:35,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:13:35,806 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:35,807 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 168 treesize of output 194 [2023-11-29 02:13:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:36,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428895122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:13:36,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:13:36,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-29 02:13:36,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307241766] [2023-11-29 02:13:36,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:13:36,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:13:36,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:13:36,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:13:36,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:13:36,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:13:36,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 294 transitions, 6780 flow. Second operand has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:36,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:13:36,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:13:36,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:13:38,322 INFO L124 PetriNetUnfolderBase]: 2189/4273 cut-off events. [2023-11-29 02:13:38,322 INFO L125 PetriNetUnfolderBase]: For 77198/77198 co-relation queries the response was YES. [2023-11-29 02:13:38,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25323 conditions, 4273 events. 2189/4273 cut-off events. For 77198/77198 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32431 event pairs, 857 based on Foata normal form. 6/4253 useless extension candidates. Maximal degree in co-relation 25212. Up to 2114 conditions per place. [2023-11-29 02:13:38,371 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 221 selfloop transitions, 98 changer transitions 18/340 dead transitions. [2023-11-29 02:13:38,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 340 transitions, 7564 flow [2023-11-29 02:13:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:13:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 02:13:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2023-11-29 02:13:38,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2023-11-29 02:13:38,372 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 148 transitions. [2023-11-29 02:13:38,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 148 transitions. [2023-11-29 02:13:38,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:13:38,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 148 transitions. [2023-11-29 02:13:38,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 12.333333333333334) internal successors, (148), 12 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:38,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 35.0) internal successors, (455), 13 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:38,373 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 35.0) internal successors, (455), 13 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:38,373 INFO L175 Difference]: Start difference. First operand has 338 places, 294 transitions, 6780 flow. Second operand 12 states and 148 transitions. [2023-11-29 02:13:38,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 340 transitions, 7564 flow [2023-11-29 02:13:38,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 340 transitions, 7429 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-29 02:13:38,583 INFO L231 Difference]: Finished difference. Result has 337 places, 290 transitions, 6721 flow [2023-11-29 02:13:38,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6581, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6721, PETRI_PLACES=337, PETRI_TRANSITIONS=290} [2023-11-29 02:13:38,584 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 306 predicate places. [2023-11-29 02:13:38,584 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 290 transitions, 6721 flow [2023-11-29 02:13:38,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:38,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:13:38,584 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:13:38,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-29 02:13:38,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 02:13:38,784 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:13:38,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:13:38,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1099760718, now seen corresponding path program 40 times [2023-11-29 02:13:38,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:13:38,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030824639] [2023-11-29 02:13:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:13:38,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:13:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:40,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:13:40,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030824639] [2023-11-29 02:13:40,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030824639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:13:40,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738763585] [2023-11-29 02:13:40,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:13:40,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:13:40,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:13:40,730 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:13:40,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 02:13:41,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:13:41,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:13:41,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 02:13:41,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:13:41,775 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:41,775 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 161 treesize of output 133 [2023-11-29 02:13:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:41,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:13:42,574 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:13:42,574 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 44 treesize of output 75 [2023-11-29 02:13:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:42,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738763585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:13:42,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:13:42,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2023-11-29 02:13:42,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497949537] [2023-11-29 02:13:42,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:13:42,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:13:42,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:13:42,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:13:42,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:13:42,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:13:42,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 290 transitions, 6721 flow. Second operand has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:42,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:13:42,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:13:42,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:13:45,073 INFO L124 PetriNetUnfolderBase]: 2213/4332 cut-off events. [2023-11-29 02:13:45,073 INFO L125 PetriNetUnfolderBase]: For 80193/80193 co-relation queries the response was YES. [2023-11-29 02:13:45,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25705 conditions, 4332 events. 2213/4332 cut-off events. For 80193/80193 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32908 event pairs, 499 based on Foata normal form. 12/4340 useless extension candidates. Maximal degree in co-relation 25594. Up to 1986 conditions per place. [2023-11-29 02:13:45,120 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 239 selfloop transitions, 95 changer transitions 10/347 dead transitions. [2023-11-29 02:13:45,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 347 transitions, 7742 flow [2023-11-29 02:13:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:13:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 02:13:45,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 173 transitions. [2023-11-29 02:13:45,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3295238095238095 [2023-11-29 02:13:45,121 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 173 transitions. [2023-11-29 02:13:45,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 173 transitions. [2023-11-29 02:13:45,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:13:45,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 173 transitions. [2023-11-29 02:13:45,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 11.533333333333333) internal successors, (173), 15 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:45,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:45,122 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:45,122 INFO L175 Difference]: Start difference. First operand has 337 places, 290 transitions, 6721 flow. Second operand 15 states and 173 transitions. [2023-11-29 02:13:45,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 347 transitions, 7742 flow [2023-11-29 02:13:45,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 347 transitions, 7526 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-11-29 02:13:45,334 INFO L231 Difference]: Finished difference. Result has 339 places, 295 transitions, 6856 flow [2023-11-29 02:13:45,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6478, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6856, PETRI_PLACES=339, PETRI_TRANSITIONS=295} [2023-11-29 02:13:45,335 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 308 predicate places. [2023-11-29 02:13:45,335 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 295 transitions, 6856 flow [2023-11-29 02:13:45,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:45,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:13:45,335 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:13:45,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-29 02:13:45,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-29 02:13:45,536 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:13:45,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:13:45,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1053685016, now seen corresponding path program 41 times [2023-11-29 02:13:45,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:13:45,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266169818] [2023-11-29 02:13:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:13:45,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:13:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:47,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:13:47,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266169818] [2023-11-29 02:13:47,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266169818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:13:47,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390576766] [2023-11-29 02:13:47,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:13:47,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:13:47,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:13:47,215 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:13:47,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 02:13:47,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:13:47,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:13:47,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 02:13:47,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:13:48,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:48,476 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 157 treesize of output 137 [2023-11-29 02:13:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:48,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:13:49,723 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:13:49,723 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 44 treesize of output 75 [2023-11-29 02:13:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:49,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390576766] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:13:49,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:13:49,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2023-11-29 02:13:49,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106146863] [2023-11-29 02:13:49,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:13:49,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:13:49,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:13:49,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:13:49,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:13:49,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:13:49,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 295 transitions, 6856 flow. Second operand has 19 states, 19 states have (on average 7.7368421052631575) internal successors, (147), 19 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:49,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:13:49,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:13:49,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:13:52,092 INFO L124 PetriNetUnfolderBase]: 2289/4498 cut-off events. [2023-11-29 02:13:52,092 INFO L125 PetriNetUnfolderBase]: For 82207/82207 co-relation queries the response was YES. [2023-11-29 02:13:52,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26621 conditions, 4498 events. 2289/4498 cut-off events. For 82207/82207 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34552 event pairs, 357 based on Foata normal form. 8/4502 useless extension candidates. Maximal degree in co-relation 26508. Up to 1416 conditions per place. [2023-11-29 02:13:52,142 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 240 selfloop transitions, 120 changer transitions 10/373 dead transitions. [2023-11-29 02:13:52,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 373 transitions, 8027 flow [2023-11-29 02:13:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:13:52,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 02:13:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 197 transitions. [2023-11-29 02:13:52,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3517857142857143 [2023-11-29 02:13:52,144 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 197 transitions. [2023-11-29 02:13:52,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 197 transitions. [2023-11-29 02:13:52,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:13:52,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 197 transitions. [2023-11-29 02:13:52,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.3125) internal successors, (197), 16 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:52,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 35.0) internal successors, (595), 17 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:52,145 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 35.0) internal successors, (595), 17 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:52,145 INFO L175 Difference]: Start difference. First operand has 339 places, 295 transitions, 6856 flow. Second operand 16 states and 197 transitions. [2023-11-29 02:13:52,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 373 transitions, 8027 flow [2023-11-29 02:13:52,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 373 transitions, 7825 flow, removed 5 selfloop flow, removed 17 redundant places. [2023-11-29 02:13:52,365 INFO L231 Difference]: Finished difference. Result has 339 places, 299 transitions, 7016 flow [2023-11-29 02:13:52,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6538, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7016, PETRI_PLACES=339, PETRI_TRANSITIONS=299} [2023-11-29 02:13:52,365 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 308 predicate places. [2023-11-29 02:13:52,366 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 299 transitions, 7016 flow [2023-11-29 02:13:52,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.7368421052631575) internal successors, (147), 19 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:52,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:13:52,366 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:13:52,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 02:13:52,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-29 02:13:52,566 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:13:52,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:13:52,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1489960856, now seen corresponding path program 42 times [2023-11-29 02:13:52,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:13:52,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965617895] [2023-11-29 02:13:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:13:52,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:13:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:54,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:13:54,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965617895] [2023-11-29 02:13:54,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965617895] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:13:54,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831358726] [2023-11-29 02:13:54,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:13:54,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:13:54,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:13:54,189 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:13:54,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 02:13:55,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 02:13:55,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:13:55,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:13:55,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:13:55,510 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:55,510 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 157 treesize of output 137 [2023-11-29 02:13:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:55,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:13:56,621 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:13:56,622 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 44 treesize of output 75 [2023-11-29 02:13:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:13:56,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831358726] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:13:56,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:13:56,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2023-11-29 02:13:56,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395754827] [2023-11-29 02:13:56,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:13:56,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:13:56,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:13:56,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:13:56,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:13:56,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:13:56,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 299 transitions, 7016 flow. Second operand has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:56,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:13:56,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:13:56,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:13:58,776 INFO L124 PetriNetUnfolderBase]: 2235/4396 cut-off events. [2023-11-29 02:13:58,776 INFO L125 PetriNetUnfolderBase]: For 80819/80819 co-relation queries the response was YES. [2023-11-29 02:13:58,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26298 conditions, 4396 events. 2235/4396 cut-off events. For 80819/80819 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 33798 event pairs, 491 based on Foata normal form. 6/4398 useless extension candidates. Maximal degree in co-relation 26188. Up to 1938 conditions per place. [2023-11-29 02:13:58,821 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 232 selfloop transitions, 97 changer transitions 14/346 dead transitions. [2023-11-29 02:13:58,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 346 transitions, 7806 flow [2023-11-29 02:13:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:13:58,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 02:13:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2023-11-29 02:13:58,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3326530612244898 [2023-11-29 02:13:58,822 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 163 transitions. [2023-11-29 02:13:58,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 163 transitions. [2023-11-29 02:13:58,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:13:58,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 163 transitions. [2023-11-29 02:13:58,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 11.642857142857142) internal successors, (163), 14 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:58,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 35.0) internal successors, (525), 15 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:58,823 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 35.0) internal successors, (525), 15 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:58,823 INFO L175 Difference]: Start difference. First operand has 339 places, 299 transitions, 7016 flow. Second operand 14 states and 163 transitions. [2023-11-29 02:13:58,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 346 transitions, 7806 flow [2023-11-29 02:13:59,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 346 transitions, 7675 flow, removed 11 selfloop flow, removed 12 redundant places. [2023-11-29 02:13:59,025 INFO L231 Difference]: Finished difference. Result has 340 places, 294 transitions, 6939 flow [2023-11-29 02:13:59,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6775, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6939, PETRI_PLACES=340, PETRI_TRANSITIONS=294} [2023-11-29 02:13:59,025 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 309 predicate places. [2023-11-29 02:13:59,026 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 294 transitions, 6939 flow [2023-11-29 02:13:59,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:59,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:13:59,026 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:13:59,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 02:13:59,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-29 02:13:59,226 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:13:59,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:13:59,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1164300131, now seen corresponding path program 43 times [2023-11-29 02:13:59,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:13:59,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618601251] [2023-11-29 02:13:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:13:59,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:13:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 02:14:01,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:14:01,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618601251] [2023-11-29 02:14:01,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618601251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:14:01,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854160271] [2023-11-29 02:14:01,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:14:01,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:14:01,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:14:01,194 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:14:01,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 02:14:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:01,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 02:14:01,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:14:02,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:14:02,273 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 157 treesize of output 137 [2023-11-29 02:14:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 02:14:02,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:14:03,677 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 02:14:03,677 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 44 treesize of output 75 [2023-11-29 02:14:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:14:03,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854160271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:14:03,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:14:03,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2023-11-29 02:14:03,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421600634] [2023-11-29 02:14:03,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:14:03,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:14:03,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:14:03,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:14:03,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:14:03,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:14:03,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 294 transitions, 6939 flow. Second operand has 21 states, 21 states have (on average 7.904761904761905) internal successors, (166), 21 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:03,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:14:03,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:14:03,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:14:05,958 INFO L124 PetriNetUnfolderBase]: 2177/4253 cut-off events. [2023-11-29 02:14:05,959 INFO L125 PetriNetUnfolderBase]: For 79648/79648 co-relation queries the response was YES. [2023-11-29 02:14:05,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25968 conditions, 4253 events. 2177/4253 cut-off events. For 79648/79648 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32436 event pairs, 397 based on Foata normal form. 4/4257 useless extension candidates. Maximal degree in co-relation 25872. Up to 912 conditions per place. [2023-11-29 02:14:06,001 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 182 selfloop transitions, 160 changer transitions 16/361 dead transitions. [2023-11-29 02:14:06,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 361 transitions, 7814 flow [2023-11-29 02:14:06,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:14:06,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 02:14:06,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 215 transitions. [2023-11-29 02:14:06,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2023-11-29 02:14:06,002 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 215 transitions. [2023-11-29 02:14:06,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 215 transitions. [2023-11-29 02:14:06,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:14:06,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 215 transitions. [2023-11-29 02:14:06,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 11.944444444444445) internal successors, (215), 18 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:06,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:06,004 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:06,004 INFO L175 Difference]: Start difference. First operand has 340 places, 294 transitions, 6939 flow. Second operand 18 states and 215 transitions. [2023-11-29 02:14:06,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 361 transitions, 7814 flow [2023-11-29 02:14:06,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 361 transitions, 7714 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-11-29 02:14:06,194 INFO L231 Difference]: Finished difference. Result has 339 places, 289 transitions, 7029 flow [2023-11-29 02:14:06,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6738, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7029, PETRI_PLACES=339, PETRI_TRANSITIONS=289} [2023-11-29 02:14:06,195 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 308 predicate places. [2023-11-29 02:14:06,195 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 289 transitions, 7029 flow [2023-11-29 02:14:06,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.904761904761905) internal successors, (166), 21 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:06,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:14:06,195 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:14:06,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-29 02:14:06,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:14:06,396 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:14:06,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:14:06,396 INFO L85 PathProgramCache]: Analyzing trace with hash 586951450, now seen corresponding path program 44 times [2023-11-29 02:14:06,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:14:06,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147334678] [2023-11-29 02:14:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:14:06,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:14:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:14:11,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:14:11,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147334678] [2023-11-29 02:14:11,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147334678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:14:11,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459028469] [2023-11-29 02:14:11,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:14:11,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:14:11,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:14:11,152 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:14:11,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-29 02:14:11,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:14:11,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:14:11,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 02:14:11,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:14:14,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:14:14,097 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 357 treesize of output 293 [2023-11-29 02:14:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:14:15,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:14:19,127 INFO L349 Elim1Store]: treesize reduction 13, result has 81.2 percent of original size [2023-11-29 02:14:19,127 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 389 treesize of output 342 [2023-11-29 02:14:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:14:20,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459028469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:14:20,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:14:20,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2023-11-29 02:14:20,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40149579] [2023-11-29 02:14:20,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:14:20,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 02:14:20,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:14:20,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 02:14:20,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:14:20,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:14:20,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 289 transitions, 7029 flow. Second operand has 28 states, 28 states have (on average 7.5) internal successors, (210), 28 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:20,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:14:20,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:14:20,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:14:27,817 INFO L124 PetriNetUnfolderBase]: 3643/7178 cut-off events. [2023-11-29 02:14:27,817 INFO L125 PetriNetUnfolderBase]: For 147091/147091 co-relation queries the response was YES. [2023-11-29 02:14:27,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43797 conditions, 7178 events. 3643/7178 cut-off events. For 147091/147091 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 59252 event pairs, 749 based on Foata normal form. 25/7201 useless extension candidates. Maximal degree in co-relation 43690. Up to 1140 conditions per place. [2023-11-29 02:14:27,897 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 320 selfloop transitions, 218 changer transitions 64/605 dead transitions. [2023-11-29 02:14:27,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 605 transitions, 12860 flow [2023-11-29 02:14:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 02:14:27,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-29 02:14:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 440 transitions. [2023-11-29 02:14:27,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35918367346938773 [2023-11-29 02:14:27,899 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 440 transitions. [2023-11-29 02:14:27,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 440 transitions. [2023-11-29 02:14:27,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:14:27,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 440 transitions. [2023-11-29 02:14:27,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 12.571428571428571) internal successors, (440), 35 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:27,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 35.0) internal successors, (1260), 36 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:27,901 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 35.0) internal successors, (1260), 36 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:27,901 INFO L175 Difference]: Start difference. First operand has 339 places, 289 transitions, 7029 flow. Second operand 35 states and 440 transitions. [2023-11-29 02:14:27,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 605 transitions, 12860 flow [2023-11-29 02:14:28,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 605 transitions, 12610 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-29 02:14:28,264 INFO L231 Difference]: Finished difference. Result has 372 places, 369 transitions, 9619 flow [2023-11-29 02:14:28,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6843, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9619, PETRI_PLACES=372, PETRI_TRANSITIONS=369} [2023-11-29 02:14:28,265 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 341 predicate places. [2023-11-29 02:14:28,265 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 369 transitions, 9619 flow [2023-11-29 02:14:28,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.5) internal successors, (210), 28 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:28,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:14:28,265 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:14:28,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-29 02:14:28,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:14:28,466 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:14:28,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:14:28,466 INFO L85 PathProgramCache]: Analyzing trace with hash -699633902, now seen corresponding path program 45 times [2023-11-29 02:14:28,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:14:28,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73169817] [2023-11-29 02:14:28,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:14:28,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:14:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:14:32,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:14:32,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73169817] [2023-11-29 02:14:32,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73169817] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:14:32,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432847893] [2023-11-29 02:14:32,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:14:32,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:14:32,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:14:32,760 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:14:32,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-29 02:14:33,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:14:33,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:14:33,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 02:14:33,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:14:34,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:14:34,840 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 326 treesize of output 274 [2023-11-29 02:14:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:14:36,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:14:39,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:14:39,623 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 384 treesize of output 362 [2023-11-29 02:14:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:14:41,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432847893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:14:41,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:14:41,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2023-11-29 02:14:41,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995028034] [2023-11-29 02:14:41,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:14:41,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:14:41,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:14:41,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:14:41,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:14:41,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:14:41,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 369 transitions, 9619 flow. Second operand has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:41,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:14:41,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:14:41,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:14:46,024 INFO L124 PetriNetUnfolderBase]: 3553/6907 cut-off events. [2023-11-29 02:14:46,024 INFO L125 PetriNetUnfolderBase]: For 156061/156061 co-relation queries the response was YES. [2023-11-29 02:14:46,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43887 conditions, 6907 events. 3553/6907 cut-off events. For 156061/156061 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 56349 event pairs, 1079 based on Foata normal form. 3/6904 useless extension candidates. Maximal degree in co-relation 43766. Up to 2710 conditions per place. [2023-11-29 02:14:46,099 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 250 selfloop transitions, 190 changer transitions 24/467 dead transitions. [2023-11-29 02:14:46,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 467 transitions, 11175 flow [2023-11-29 02:14:46,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 02:14:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 02:14:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 253 transitions. [2023-11-29 02:14:46,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3442176870748299 [2023-11-29 02:14:46,100 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 253 transitions. [2023-11-29 02:14:46,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 253 transitions. [2023-11-29 02:14:46,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:14:46,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 253 transitions. [2023-11-29 02:14:46,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 12.047619047619047) internal successors, (253), 21 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:46,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:46,102 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:46,102 INFO L175 Difference]: Start difference. First operand has 372 places, 369 transitions, 9619 flow. Second operand 21 states and 253 transitions. [2023-11-29 02:14:46,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 467 transitions, 11175 flow [2023-11-29 02:14:46,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 467 transitions, 10844 flow, removed 93 selfloop flow, removed 14 redundant places. [2023-11-29 02:14:46,572 INFO L231 Difference]: Finished difference. Result has 380 places, 380 transitions, 9989 flow [2023-11-29 02:14:46,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=9300, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9989, PETRI_PLACES=380, PETRI_TRANSITIONS=380} [2023-11-29 02:14:46,573 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 349 predicate places. [2023-11-29 02:14:46,573 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 380 transitions, 9989 flow [2023-11-29 02:14:46,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:46,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:14:46,573 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:14:46,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-29 02:14:46,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-29 02:14:46,774 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:14:46,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:14:46,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1229444206, now seen corresponding path program 46 times [2023-11-29 02:14:46,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:14:46,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641431802] [2023-11-29 02:14:46,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:14:46,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:14:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:14:51,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:14:51,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641431802] [2023-11-29 02:14:51,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641431802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:14:51,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129779824] [2023-11-29 02:14:51,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:14:51,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:14:51,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:14:51,442 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:14:51,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-29 02:14:52,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:14:52,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:14:52,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 02:14:52,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:14:54,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:14:54,061 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 382 treesize of output 314 [2023-11-29 02:14:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:14:55,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:14:58,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:14:58,794 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 430 treesize of output 402 [2023-11-29 02:15:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:15:01,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129779824] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:15:01,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:15:01,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2023-11-29 02:15:01,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982930314] [2023-11-29 02:15:01,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:15:01,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:15:01,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:15:01,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:15:01,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:15:01,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:15:01,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 380 transitions, 9989 flow. Second operand has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:01,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:15:01,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:15:01,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:15:09,758 INFO L124 PetriNetUnfolderBase]: 4113/8089 cut-off events. [2023-11-29 02:15:09,758 INFO L125 PetriNetUnfolderBase]: For 191769/191769 co-relation queries the response was YES. [2023-11-29 02:15:09,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50520 conditions, 8089 events. 4113/8089 cut-off events. For 191769/191769 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 67390 event pairs, 1071 based on Foata normal form. 31/8114 useless extension candidates. Maximal degree in co-relation 50398. Up to 2734 conditions per place. [2023-11-29 02:15:09,848 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 332 selfloop transitions, 236 changer transitions 61/632 dead transitions. [2023-11-29 02:15:09,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 632 transitions, 13884 flow [2023-11-29 02:15:09,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 02:15:09,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-29 02:15:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 484 transitions. [2023-11-29 02:15:09,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3545787545787546 [2023-11-29 02:15:09,849 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 484 transitions. [2023-11-29 02:15:09,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 484 transitions. [2023-11-29 02:15:09,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:15:09,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 484 transitions. [2023-11-29 02:15:09,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 12.41025641025641) internal successors, (484), 39 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:09,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 35.0) internal successors, (1400), 40 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:09,851 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 35.0) internal successors, (1400), 40 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:09,852 INFO L175 Difference]: Start difference. First operand has 380 places, 380 transitions, 9989 flow. Second operand 39 states and 484 transitions. [2023-11-29 02:15:09,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 632 transitions, 13884 flow [2023-11-29 02:15:10,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 632 transitions, 13561 flow, removed 43 selfloop flow, removed 11 redundant places. [2023-11-29 02:15:10,360 INFO L231 Difference]: Finished difference. Result has 421 places, 435 transitions, 11801 flow [2023-11-29 02:15:10,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=9685, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=11801, PETRI_PLACES=421, PETRI_TRANSITIONS=435} [2023-11-29 02:15:10,361 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 390 predicate places. [2023-11-29 02:15:10,361 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 435 transitions, 11801 flow [2023-11-29 02:15:10,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:10,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:15:10,361 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:15:10,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-29 02:15:10,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-29 02:15:10,562 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:15:10,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:15:10,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1707325208, now seen corresponding path program 47 times [2023-11-29 02:15:10,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:15:10,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903812577] [2023-11-29 02:15:10,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:15:10,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:15:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:15:14,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:15:14,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903812577] [2023-11-29 02:15:14,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903812577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:15:14,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682410507] [2023-11-29 02:15:14,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:15:14,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:15:14,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:15:14,858 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:15:14,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-29 02:15:15,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:15:15,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:15:15,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 02:15:15,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:15:17,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:15:17,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 325 treesize of output 269 [2023-11-29 02:15:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:15:18,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:15:20,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:15:20,780 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 419 treesize of output 397 [2023-11-29 02:15:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:15:22,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682410507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:15:22,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:15:22,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 26 [2023-11-29 02:15:22,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638695473] [2023-11-29 02:15:22,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:15:22,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 02:15:22,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:15:22,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 02:15:22,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:15:22,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:15:22,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 435 transitions, 11801 flow. Second operand has 26 states, 26 states have (on average 7.461538461538462) internal successors, (194), 26 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:22,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:15:22,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:15:22,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:15:28,837 INFO L124 PetriNetUnfolderBase]: 4223/8266 cut-off events. [2023-11-29 02:15:28,837 INFO L125 PetriNetUnfolderBase]: For 216933/216933 co-relation queries the response was YES. [2023-11-29 02:15:28,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53243 conditions, 8266 events. 4223/8266 cut-off events. For 216933/216933 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 68747 event pairs, 1569 based on Foata normal form. 3/8245 useless extension candidates. Maximal degree in co-relation 53107. Up to 4440 conditions per place. [2023-11-29 02:15:28,945 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 371 selfloop transitions, 201 changer transitions 40/615 dead transitions. [2023-11-29 02:15:28,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 615 transitions, 14641 flow [2023-11-29 02:15:28,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 02:15:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 02:15:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 383 transitions. [2023-11-29 02:15:28,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3647619047619048 [2023-11-29 02:15:28,947 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 383 transitions. [2023-11-29 02:15:28,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 383 transitions. [2023-11-29 02:15:28,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:15:28,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 383 transitions. [2023-11-29 02:15:28,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 12.766666666666667) internal successors, (383), 30 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:28,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 35.0) internal successors, (1085), 31 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:28,949 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 35.0) internal successors, (1085), 31 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:28,949 INFO L175 Difference]: Start difference. First operand has 421 places, 435 transitions, 11801 flow. Second operand 30 states and 383 transitions. [2023-11-29 02:15:28,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 615 transitions, 14641 flow [2023-11-29 02:15:29,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 615 transitions, 14042 flow, removed 259 selfloop flow, removed 17 redundant places. [2023-11-29 02:15:29,845 INFO L231 Difference]: Finished difference. Result has 433 places, 459 transitions, 12438 flow [2023-11-29 02:15:29,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=11272, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=12438, PETRI_PLACES=433, PETRI_TRANSITIONS=459} [2023-11-29 02:15:29,846 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 402 predicate places. [2023-11-29 02:15:29,846 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 459 transitions, 12438 flow [2023-11-29 02:15:29,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.461538461538462) internal successors, (194), 26 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:29,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:15:29,846 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:15:29,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-29 02:15:30,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:15:30,047 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:15:30,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:15:30,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1779164756, now seen corresponding path program 48 times [2023-11-29 02:15:30,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:15:30,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685569648] [2023-11-29 02:15:30,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:15:30,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:15:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:15:34,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:15:34,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685569648] [2023-11-29 02:15:34,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685569648] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:15:34,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472353314] [2023-11-29 02:15:34,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:15:34,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:15:34,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:15:34,685 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:15:34,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-29 02:15:35,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 02:15:35,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:15:35,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 02:15:35,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:15:36,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:15:36,764 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 326 treesize of output 274 [2023-11-29 02:15:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:15:38,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:15:41,427 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:15:41,427 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 394 treesize of output 365 [2023-11-29 02:15:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:15:42,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472353314] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:15:42,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:15:42,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2023-11-29 02:15:42,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739269638] [2023-11-29 02:15:42,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:15:42,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:15:42,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:15:42,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:15:42,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:15:42,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:15:42,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 459 transitions, 12438 flow. Second operand has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:42,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:15:42,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:15:42,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:15:50,082 INFO L124 PetriNetUnfolderBase]: 4495/8913 cut-off events. [2023-11-29 02:15:50,083 INFO L125 PetriNetUnfolderBase]: For 231855/231855 co-relation queries the response was YES. [2023-11-29 02:15:50,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56357 conditions, 8913 events. 4495/8913 cut-off events. For 231855/231855 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 75277 event pairs, 1277 based on Foata normal form. 6/8911 useless extension candidates. Maximal degree in co-relation 56224. Up to 3126 conditions per place. [2023-11-29 02:15:50,192 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 366 selfloop transitions, 216 changer transitions 54/639 dead transitions. [2023-11-29 02:15:50,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 639 transitions, 15071 flow [2023-11-29 02:15:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 02:15:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-29 02:15:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 415 transitions. [2023-11-29 02:15:50,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33877551020408164 [2023-11-29 02:15:50,193 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 415 transitions. [2023-11-29 02:15:50,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 415 transitions. [2023-11-29 02:15:50,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:15:50,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 415 transitions. [2023-11-29 02:15:50,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 11.857142857142858) internal successors, (415), 35 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:50,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 35.0) internal successors, (1260), 36 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:50,195 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 35.0) internal successors, (1260), 36 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:50,195 INFO L175 Difference]: Start difference. First operand has 433 places, 459 transitions, 12438 flow. Second operand 35 states and 415 transitions. [2023-11-29 02:15:50,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 639 transitions, 15071 flow [2023-11-29 02:15:50,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 639 transitions, 14797 flow, removed 93 selfloop flow, removed 15 redundant places. [2023-11-29 02:15:50,949 INFO L231 Difference]: Finished difference. Result has 467 places, 482 transitions, 13282 flow [2023-11-29 02:15:50,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=12168, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13282, PETRI_PLACES=467, PETRI_TRANSITIONS=482} [2023-11-29 02:15:50,949 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 436 predicate places. [2023-11-29 02:15:50,949 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 482 transitions, 13282 flow [2023-11-29 02:15:50,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:50,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:15:50,950 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:15:50,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-11-29 02:15:51,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:15:51,150 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:15:51,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:15:51,151 INFO L85 PathProgramCache]: Analyzing trace with hash -115573542, now seen corresponding path program 49 times [2023-11-29 02:15:51,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:15:51,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836892820] [2023-11-29 02:15:51,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:15:51,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:15:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:15:55,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:15:55,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836892820] [2023-11-29 02:15:55,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836892820] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:15:55,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338566775] [2023-11-29 02:15:55,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:15:55,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:15:55,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:15:55,725 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:15:55,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-29 02:15:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:56,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 02:15:56,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:15:57,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:15:57,592 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 326 treesize of output 274 [2023-11-29 02:15:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:15:58,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:16:01,768 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:16:01,768 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 376 treesize of output 354 [2023-11-29 02:16:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:16:03,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338566775] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:16:03,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:16:03,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2023-11-29 02:16:03,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367323801] [2023-11-29 02:16:03,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:16:03,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:16:03,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:03,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:16:03,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:16:03,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:16:03,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 482 transitions, 13282 flow. Second operand has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:03,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:16:03,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:16:03,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:16:09,568 INFO L124 PetriNetUnfolderBase]: 4803/9498 cut-off events. [2023-11-29 02:16:09,568 INFO L125 PetriNetUnfolderBase]: For 271494/271494 co-relation queries the response was YES. [2023-11-29 02:16:09,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61664 conditions, 9498 events. 4803/9498 cut-off events. For 271494/271494 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 80842 event pairs, 1849 based on Foata normal form. 6/9494 useless extension candidates. Maximal degree in co-relation 61517. Up to 3874 conditions per place. [2023-11-29 02:16:09,729 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 463 selfloop transitions, 163 changer transitions 27/656 dead transitions. [2023-11-29 02:16:09,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 656 transitions, 16601 flow [2023-11-29 02:16:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 02:16:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 02:16:09,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 348 transitions. [2023-11-29 02:16:09,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3551020408163265 [2023-11-29 02:16:09,730 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 348 transitions. [2023-11-29 02:16:09,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 348 transitions. [2023-11-29 02:16:09,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:16:09,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 348 transitions. [2023-11-29 02:16:09,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 12.428571428571429) internal successors, (348), 28 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:09,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 35.0) internal successors, (1015), 29 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:09,732 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 35.0) internal successors, (1015), 29 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:09,732 INFO L175 Difference]: Start difference. First operand has 467 places, 482 transitions, 13282 flow. Second operand 28 states and 348 transitions. [2023-11-29 02:16:09,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 656 transitions, 16601 flow [2023-11-29 02:16:10,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 656 transitions, 16344 flow, removed 98 selfloop flow, removed 16 redundant places. [2023-11-29 02:16:10,705 INFO L231 Difference]: Finished difference. Result has 483 places, 515 transitions, 14463 flow [2023-11-29 02:16:10,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=13049, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=14463, PETRI_PLACES=483, PETRI_TRANSITIONS=515} [2023-11-29 02:16:10,706 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 452 predicate places. [2023-11-29 02:16:10,706 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 515 transitions, 14463 flow [2023-11-29 02:16:10,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:10,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:16:10,706 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:16:10,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-11-29 02:16:10,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-11-29 02:16:10,907 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:16:10,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:10,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1994063610, now seen corresponding path program 50 times [2023-11-29 02:16:10,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:10,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074461647] [2023-11-29 02:16:10,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:10,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:16:15,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:15,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074461647] [2023-11-29 02:16:15,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074461647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:16:15,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341871258] [2023-11-29 02:16:15,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:16:15,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:15,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:15,188 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:15,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-29 02:16:15,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:16:15,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:16:15,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 02:16:15,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:17,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:16:17,181 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 326 treesize of output 274 [2023-11-29 02:16:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:16:18,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:16:21,352 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:16:21,352 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 385 treesize of output 357 [2023-11-29 02:16:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:16:23,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341871258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:16:23,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:16:23,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2023-11-29 02:16:23,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003115612] [2023-11-29 02:16:23,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:16:23,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:16:23,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:23,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:16:23,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:16:23,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:16:23,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 515 transitions, 14463 flow. Second operand has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:23,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:16:23,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:16:23,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:16:30,741 INFO L124 PetriNetUnfolderBase]: 5103/10101 cut-off events. [2023-11-29 02:16:30,741 INFO L125 PetriNetUnfolderBase]: For 310734/310734 co-relation queries the response was YES. [2023-11-29 02:16:30,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66530 conditions, 10101 events. 5103/10101 cut-off events. For 310734/310734 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 87247 event pairs, 1815 based on Foata normal form. 4/10093 useless extension candidates. Maximal degree in co-relation 66378. Up to 4008 conditions per place. [2023-11-29 02:16:30,892 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 466 selfloop transitions, 190 changer transitions 40/699 dead transitions. [2023-11-29 02:16:30,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 699 transitions, 17886 flow [2023-11-29 02:16:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 02:16:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 02:16:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 384 transitions. [2023-11-29 02:16:30,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34285714285714286 [2023-11-29 02:16:30,894 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 384 transitions. [2023-11-29 02:16:30,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 384 transitions. [2023-11-29 02:16:30,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:16:30,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 384 transitions. [2023-11-29 02:16:30,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 12.0) internal successors, (384), 32 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:30,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 35.0) internal successors, (1155), 33 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:30,895 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 35.0) internal successors, (1155), 33 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:30,895 INFO L175 Difference]: Start difference. First operand has 483 places, 515 transitions, 14463 flow. Second operand 32 states and 384 transitions. [2023-11-29 02:16:30,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 699 transitions, 17886 flow [2023-11-29 02:16:32,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 699 transitions, 17583 flow, removed 139 selfloop flow, removed 9 redundant places. [2023-11-29 02:16:32,142 INFO L231 Difference]: Finished difference. Result has 514 places, 544 transitions, 15655 flow [2023-11-29 02:16:32,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=14176, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=15655, PETRI_PLACES=514, PETRI_TRANSITIONS=544} [2023-11-29 02:16:32,143 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 483 predicate places. [2023-11-29 02:16:32,143 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 544 transitions, 15655 flow [2023-11-29 02:16:32,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:32,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:16:32,143 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:16:32,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-11-29 02:16:32,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:32,344 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:16:32,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:32,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1408442914, now seen corresponding path program 51 times [2023-11-29 02:16:32,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:32,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677091709] [2023-11-29 02:16:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:32,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:16:37,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:37,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677091709] [2023-11-29 02:16:37,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677091709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:16:37,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948946240] [2023-11-29 02:16:37,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:16:37,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:37,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:37,110 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:37,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-29 02:16:37,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:16:37,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:16:37,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 02:16:37,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:39,460 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:16:39,460 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 339 treesize of output 287 [2023-11-29 02:16:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:16:40,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:16:44,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:16:44,333 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 398 treesize of output 376 [2023-11-29 02:16:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:16:46,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948946240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:16:46,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:16:46,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2023-11-29 02:16:46,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572098065] [2023-11-29 02:16:46,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:16:46,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:16:46,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:16:46,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:16:46,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:16:46,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 544 transitions, 15655 flow. Second operand has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:46,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:16:46,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:16:46,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:16:56,839 INFO L124 PetriNetUnfolderBase]: 5637/11188 cut-off events. [2023-11-29 02:16:56,839 INFO L125 PetriNetUnfolderBase]: For 374725/374725 co-relation queries the response was YES. [2023-11-29 02:16:56,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75039 conditions, 11188 events. 5637/11188 cut-off events. For 374725/374725 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 98818 event pairs, 1923 based on Foata normal form. 5/11171 useless extension candidates. Maximal degree in co-relation 74877. Up to 4493 conditions per place. [2023-11-29 02:16:57,004 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 483 selfloop transitions, 234 changer transitions 36/756 dead transitions. [2023-11-29 02:16:57,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 756 transitions, 20116 flow [2023-11-29 02:16:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 02:16:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-29 02:16:57,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 401 transitions. [2023-11-29 02:16:57,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3471861471861472 [2023-11-29 02:16:57,006 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 401 transitions. [2023-11-29 02:16:57,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 401 transitions. [2023-11-29 02:16:57,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:16:57,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 401 transitions. [2023-11-29 02:16:57,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 12.151515151515152) internal successors, (401), 33 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:57,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 35.0) internal successors, (1190), 34 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:57,008 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 35.0) internal successors, (1190), 34 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:57,008 INFO L175 Difference]: Start difference. First operand has 514 places, 544 transitions, 15655 flow. Second operand 33 states and 401 transitions. [2023-11-29 02:16:57,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 756 transitions, 20116 flow [2023-11-29 02:16:58,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 756 transitions, 19796 flow, removed 126 selfloop flow, removed 15 redundant places. [2023-11-29 02:16:58,693 INFO L231 Difference]: Finished difference. Result has 538 places, 601 transitions, 17944 flow [2023-11-29 02:16:58,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=15355, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=17944, PETRI_PLACES=538, PETRI_TRANSITIONS=601} [2023-11-29 02:16:58,694 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 507 predicate places. [2023-11-29 02:16:58,694 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 601 transitions, 17944 flow [2023-11-29 02:16:58,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:58,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:16:58,694 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:16:58,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-11-29 02:16:58,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:58,895 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:16:58,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:58,895 INFO L85 PathProgramCache]: Analyzing trace with hash 231024443, now seen corresponding path program 52 times [2023-11-29 02:16:58,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:58,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867659648] [2023-11-29 02:16:58,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:58,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 02:17:00,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:00,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867659648] [2023-11-29 02:17:00,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867659648] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:17:00,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047536699] [2023-11-29 02:17:00,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:17:00,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:00,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:17:00,834 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:17:00,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-29 02:17:01,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:17:01,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:17:01,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 02:17:01,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:17:02,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:17:02,057 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 157 treesize of output 137 [2023-11-29 02:17:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 02:17:02,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:17:03,228 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:17:03,229 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 51 treesize of output 95 [2023-11-29 02:17:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 02:17:03,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047536699] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:17:03,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:17:03,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-29 02:17:03,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560128396] [2023-11-29 02:17:03,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:17:03,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:17:03,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:17:03,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:17:03,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:17:03,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:17:03,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 601 transitions, 17944 flow. Second operand has 20 states, 20 states have (on average 7.6) internal successors, (152), 20 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:17:03,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:17:03,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:17:03,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:17:08,639 INFO L124 PetriNetUnfolderBase]: 5527/11008 cut-off events. [2023-11-29 02:17:08,639 INFO L125 PetriNetUnfolderBase]: For 386220/386220 co-relation queries the response was YES. [2023-11-29 02:17:08,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74973 conditions, 11008 events. 5527/11008 cut-off events. For 386220/386220 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 96737 event pairs, 1745 based on Foata normal form. 6/11006 useless extension candidates. Maximal degree in co-relation 74856. Up to 4058 conditions per place. [2023-11-29 02:17:08,845 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 396 selfloop transitions, 233 changer transitions 13/645 dead transitions. [2023-11-29 02:17:08,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 645 transitions, 19289 flow [2023-11-29 02:17:08,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:17:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 02:17:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 159 transitions. [2023-11-29 02:17:08,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34945054945054943 [2023-11-29 02:17:08,846 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 159 transitions. [2023-11-29 02:17:08,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 159 transitions. [2023-11-29 02:17:08,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:17:08,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 159 transitions. [2023-11-29 02:17:08,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 12.23076923076923) internal successors, (159), 13 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:17:08,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 35.0) internal successors, (490), 14 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:17:08,848 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 35.0) internal successors, (490), 14 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:17:08,848 INFO L175 Difference]: Start difference. First operand has 538 places, 601 transitions, 17944 flow. Second operand 13 states and 159 transitions. [2023-11-29 02:17:08,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 645 transitions, 19289 flow [2023-11-29 02:17:10,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 645 transitions, 18656 flow, removed 188 selfloop flow, removed 21 redundant places. [2023-11-29 02:17:10,441 INFO L231 Difference]: Finished difference. Result has 524 places, 596 transitions, 17653 flow [2023-11-29 02:17:10,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=17222, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17653, PETRI_PLACES=524, PETRI_TRANSITIONS=596} [2023-11-29 02:17:10,442 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 493 predicate places. [2023-11-29 02:17:10,442 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 596 transitions, 17653 flow [2023-11-29 02:17:10,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.6) internal successors, (152), 20 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:17:10,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:17:10,442 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:17:10,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-11-29 02:17:10,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-29 02:17:10,643 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:17:10,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:10,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1096688786, now seen corresponding path program 53 times [2023-11-29 02:17:10,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:10,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566029747] [2023-11-29 02:17:10,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:10,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:17:15,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:15,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566029747] [2023-11-29 02:17:15,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566029747] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:17:15,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259165057] [2023-11-29 02:17:15,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:17:15,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:15,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:17:15,122 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:17:15,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-29 02:17:15,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:17:15,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:17:15,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 02:17:15,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:17:15,849 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 15 treesize of output 1 [2023-11-29 02:17:17,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:17:17,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 325 treesize of output 269 [2023-11-29 02:17:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:17:18,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:17:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:17:27,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259165057] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:17:27,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:17:27,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2023-11-29 02:17:27,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821656842] [2023-11-29 02:17:27,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:17:27,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:17:27,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:17:27,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:17:27,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:17:27,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:17:27,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 596 transitions, 17653 flow. Second operand has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:17:27,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:17:27,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:17:27,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:17:49,489 INFO L124 PetriNetUnfolderBase]: 5769/11415 cut-off events. [2023-11-29 02:17:49,489 INFO L125 PetriNetUnfolderBase]: For 411626/411626 co-relation queries the response was YES. [2023-11-29 02:17:49,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78022 conditions, 11415 events. 5769/11415 cut-off events. For 411626/411626 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 101054 event pairs, 2271 based on Foata normal form. 3/11380 useless extension candidates. Maximal degree in co-relation 77907. Up to 5576 conditions per place. [2023-11-29 02:17:49,671 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 509 selfloop transitions, 224 changer transitions 41/777 dead transitions. [2023-11-29 02:17:49,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 777 transitions, 21175 flow [2023-11-29 02:17:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 02:17:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 02:17:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 380 transitions. [2023-11-29 02:17:49,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2023-11-29 02:17:49,672 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 380 transitions. [2023-11-29 02:17:49,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 380 transitions. [2023-11-29 02:17:49,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:17:49,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 380 transitions. [2023-11-29 02:17:49,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 11.875) internal successors, (380), 32 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:17:49,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 35.0) internal successors, (1155), 33 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:17:49,674 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 35.0) internal successors, (1155), 33 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:17:49,674 INFO L175 Difference]: Start difference. First operand has 524 places, 596 transitions, 17653 flow. Second operand 32 states and 380 transitions. [2023-11-29 02:17:49,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 777 transitions, 21175 flow [2023-11-29 02:17:51,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 777 transitions, 20535 flow, removed 4 selfloop flow, removed 13 redundant places. [2023-11-29 02:17:51,197 INFO L231 Difference]: Finished difference. Result has 544 places, 622 transitions, 18492 flow [2023-11-29 02:17:51,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=17041, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=18492, PETRI_PLACES=544, PETRI_TRANSITIONS=622} [2023-11-29 02:17:51,198 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 513 predicate places. [2023-11-29 02:17:51,198 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 622 transitions, 18492 flow [2023-11-29 02:17:51,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:17:51,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:17:51,198 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:17:51,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-11-29 02:17:51,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:51,399 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:17:51,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:51,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1571145724, now seen corresponding path program 54 times [2023-11-29 02:17:51,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:51,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171189295] [2023-11-29 02:17:51,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:51,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:17:55,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:55,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171189295] [2023-11-29 02:17:55,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171189295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:17:55,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752974583] [2023-11-29 02:17:55,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:17:55,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:55,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:17:55,772 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:17:55,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-29 02:17:56,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 02:17:56,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:17:56,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 02:17:56,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:17:58,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:17:58,599 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 379 treesize of output 311 [2023-11-29 02:17:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:17:59,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:18:03,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:18:03,474 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 454 treesize of output 414 [2023-11-29 02:18:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:18:05,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752974583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:18:05,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:18:05,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2023-11-29 02:18:05,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012778540] [2023-11-29 02:18:05,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:18:05,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 02:18:05,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:18:05,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 02:18:05,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:18:05,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:18:05,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 622 transitions, 18492 flow. Second operand has 28 states, 28 states have (on average 7.464285714285714) internal successors, (209), 28 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:18:05,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:18:05,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:18:05,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:18:16,946 INFO L124 PetriNetUnfolderBase]: 6491/12894 cut-off events. [2023-11-29 02:18:16,946 INFO L125 PetriNetUnfolderBase]: For 497005/497005 co-relation queries the response was YES. [2023-11-29 02:18:17,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89820 conditions, 12894 events. 6491/12894 cut-off events. For 497005/497005 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 116130 event pairs, 2149 based on Foata normal form. 22/12886 useless extension candidates. Maximal degree in co-relation 89694. Up to 4865 conditions per place. [2023-11-29 02:18:17,197 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 542 selfloop transitions, 286 changer transitions 51/882 dead transitions. [2023-11-29 02:18:17,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 882 transitions, 24705 flow [2023-11-29 02:18:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 02:18:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 02:18:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 450 transitions. [2023-11-29 02:18:17,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3474903474903475 [2023-11-29 02:18:17,198 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 450 transitions. [2023-11-29 02:18:17,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 450 transitions. [2023-11-29 02:18:17,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:18:17,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 450 transitions. [2023-11-29 02:18:17,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 12.162162162162161) internal successors, (450), 37 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:18:17,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 35.0) internal successors, (1330), 38 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:18:17,200 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 35.0) internal successors, (1330), 38 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:18:17,200 INFO L175 Difference]: Start difference. First operand has 544 places, 622 transitions, 18492 flow. Second operand 37 states and 450 transitions. [2023-11-29 02:18:17,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 882 transitions, 24705 flow [2023-11-29 02:18:19,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 882 transitions, 24213 flow, removed 199 selfloop flow, removed 14 redundant places. [2023-11-29 02:18:19,206 INFO L231 Difference]: Finished difference. Result has 576 places, 699 transitions, 21782 flow [2023-11-29 02:18:19,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=18022, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=21782, PETRI_PLACES=576, PETRI_TRANSITIONS=699} [2023-11-29 02:18:19,207 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 545 predicate places. [2023-11-29 02:18:19,207 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 699 transitions, 21782 flow [2023-11-29 02:18:19,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.464285714285714) internal successors, (209), 28 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:18:19,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:18:19,207 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:18:19,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-11-29 02:18:19,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:18:19,408 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:18:19,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:18:19,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2138148002, now seen corresponding path program 55 times [2023-11-29 02:18:19,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:18:19,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123789375] [2023-11-29 02:18:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:18:19,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:18:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:18:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:18:23,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:18:23,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123789375] [2023-11-29 02:18:23,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123789375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:18:23,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091233905] [2023-11-29 02:18:23,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:18:23,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:18:23,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:18:23,857 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:18:23,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-29 02:18:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:18:24,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 02:18:24,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:18:25,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:18:25,767 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 326 treesize of output 274 [2023-11-29 02:18:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:18:27,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:18:30,270 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:18:30,270 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 394 treesize of output 365 [2023-11-29 02:18:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:18:31,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091233905] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:18:31,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:18:31,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2023-11-29 02:18:31,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809629077] [2023-11-29 02:18:31,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:18:31,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:18:31,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:18:31,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:18:31,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:18:31,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:18:31,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 699 transitions, 21782 flow. Second operand has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:18:31,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:18:31,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:18:31,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:18:41,585 INFO L124 PetriNetUnfolderBase]: 6643/13174 cut-off events. [2023-11-29 02:18:41,585 INFO L125 PetriNetUnfolderBase]: For 542056/542056 co-relation queries the response was YES. [2023-11-29 02:18:41,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94019 conditions, 13174 events. 6643/13174 cut-off events. For 542056/542056 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 119051 event pairs, 2511 based on Foata normal form. 6/13142 useless extension candidates. Maximal degree in co-relation 93883. Up to 6160 conditions per place. [2023-11-29 02:18:41,827 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 598 selfloop transitions, 239 changer transitions 56/896 dead transitions. [2023-11-29 02:18:41,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 896 transitions, 25849 flow [2023-11-29 02:18:41,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 02:18:41,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 02:18:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 429 transitions. [2023-11-29 02:18:41,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3312741312741313 [2023-11-29 02:18:41,828 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 429 transitions. [2023-11-29 02:18:41,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 429 transitions. [2023-11-29 02:18:41,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:18:41,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 429 transitions. [2023-11-29 02:18:41,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 11.594594594594595) internal successors, (429), 37 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:18:41,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 35.0) internal successors, (1330), 38 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:18:41,830 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 35.0) internal successors, (1330), 38 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:18:41,830 INFO L175 Difference]: Start difference. First operand has 576 places, 699 transitions, 21782 flow. Second operand 37 states and 429 transitions. [2023-11-29 02:18:41,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 896 transitions, 25849 flow [2023-11-29 02:18:44,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 896 transitions, 24835 flow, removed 439 selfloop flow, removed 23 redundant places. [2023-11-29 02:18:44,314 INFO L231 Difference]: Finished difference. Result has 597 places, 725 transitions, 22477 flow [2023-11-29 02:18:44,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=20870, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=22477, PETRI_PLACES=597, PETRI_TRANSITIONS=725} [2023-11-29 02:18:44,315 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 566 predicate places. [2023-11-29 02:18:44,315 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 725 transitions, 22477 flow [2023-11-29 02:18:44,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:18:44,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:18:44,315 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:18:44,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-11-29 02:18:44,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:18:44,515 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:18:44,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:18:44,516 INFO L85 PathProgramCache]: Analyzing trace with hash -243737532, now seen corresponding path program 56 times [2023-11-29 02:18:44,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:18:44,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470980954] [2023-11-29 02:18:44,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:18:44,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:18:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:18:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:18:48,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:18:48,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470980954] [2023-11-29 02:18:48,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470980954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:18:48,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347861881] [2023-11-29 02:18:48,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:18:48,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:18:48,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:18:48,915 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:18:48,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-29 02:18:49,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:18:49,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:18:49,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 02:18:49,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:18:50,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:18:50,904 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 346 treesize of output 286 [2023-11-29 02:18:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:18:52,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:18:54,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:18:54,916 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 376 treesize of output 354 [2023-11-29 02:18:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:18:56,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347861881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:18:56,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:18:56,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2023-11-29 02:18:56,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615749612] [2023-11-29 02:18:56,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:18:56,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 02:18:56,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:18:56,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 02:18:56,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:18:56,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:18:56,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 725 transitions, 22477 flow. Second operand has 28 states, 28 states have (on average 7.5) internal successors, (210), 28 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:18:56,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:18:56,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:18:56,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:19:05,071 INFO L124 PetriNetUnfolderBase]: 7019/13960 cut-off events. [2023-11-29 02:19:05,071 INFO L125 PetriNetUnfolderBase]: For 587605/587605 co-relation queries the response was YES. [2023-11-29 02:19:05,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99488 conditions, 13960 events. 7019/13960 cut-off events. For 587605/587605 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 127409 event pairs, 3063 based on Foata normal form. 6/13956 useless extension candidates. Maximal degree in co-relation 99351. Up to 6422 conditions per place. [2023-11-29 02:19:05,350 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 704 selfloop transitions, 162 changer transitions 35/904 dead transitions. [2023-11-29 02:19:05,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 904 transitions, 27478 flow [2023-11-29 02:19:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 02:19:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 02:19:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 301 transitions. [2023-11-29 02:19:05,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3739130434782609 [2023-11-29 02:19:05,351 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 301 transitions. [2023-11-29 02:19:05,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 301 transitions. [2023-11-29 02:19:05,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:19:05,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 301 transitions. [2023-11-29 02:19:05,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 13.08695652173913) internal successors, (301), 23 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:05,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 35.0) internal successors, (840), 24 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:05,353 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 35.0) internal successors, (840), 24 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:05,353 INFO L175 Difference]: Start difference. First operand has 597 places, 725 transitions, 22477 flow. Second operand 23 states and 301 transitions. [2023-11-29 02:19:05,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 904 transitions, 27478 flow [2023-11-29 02:19:07,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 904 transitions, 26855 flow, removed 262 selfloop flow, removed 20 redundant places. [2023-11-29 02:19:07,883 INFO L231 Difference]: Finished difference. Result has 605 places, 760 transitions, 23751 flow [2023-11-29 02:19:07,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=21870, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=23751, PETRI_PLACES=605, PETRI_TRANSITIONS=760} [2023-11-29 02:19:07,884 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 574 predicate places. [2023-11-29 02:19:07,884 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 760 transitions, 23751 flow [2023-11-29 02:19:07,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.5) internal successors, (210), 28 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:07,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:19:07,884 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:19:07,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-11-29 02:19:08,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:08,085 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:19:08,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:08,085 INFO L85 PathProgramCache]: Analyzing trace with hash 609611550, now seen corresponding path program 57 times [2023-11-29 02:19:08,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:08,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463479496] [2023-11-29 02:19:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:08,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:19:12,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:12,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463479496] [2023-11-29 02:19:12,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463479496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:12,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966359] [2023-11-29 02:19:12,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:19:12,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:12,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:12,479 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:12,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-29 02:19:13,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 02:19:13,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:19:13,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 02:19:13,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:15,279 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:19:15,279 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 364 treesize of output 300 [2023-11-29 02:19:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:19:16,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:19:19,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:19:19,578 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 380 treesize of output 364 [2023-11-29 02:19:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:19:21,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:19:21,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:19:21,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2023-11-29 02:19:21,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259039061] [2023-11-29 02:19:21,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:19:21,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:19:21,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:21,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:19:21,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:19:21,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:19:21,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 760 transitions, 23751 flow. Second operand has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:21,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:19:21,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:19:21,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:19:33,208 INFO L124 PetriNetUnfolderBase]: 7247/14486 cut-off events. [2023-11-29 02:19:33,208 INFO L125 PetriNetUnfolderBase]: For 625478/625478 co-relation queries the response was YES. [2023-11-29 02:19:33,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103509 conditions, 14486 events. 7247/14486 cut-off events. For 625478/625478 co-relation queries the response was YES. Maximal size of possible extension queue 862. Compared 133423 event pairs, 1795 based on Foata normal form. 3/14443 useless extension candidates. Maximal degree in co-relation 103366. Up to 4972 conditions per place. [2023-11-29 02:19:33,523 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 584 selfloop transitions, 351 changer transitions 48/986 dead transitions. [2023-11-29 02:19:33,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 986 transitions, 28476 flow [2023-11-29 02:19:33,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 02:19:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-29 02:19:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 471 transitions. [2023-11-29 02:19:33,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3364285714285714 [2023-11-29 02:19:33,525 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 471 transitions. [2023-11-29 02:19:33,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 471 transitions. [2023-11-29 02:19:33,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:19:33,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 471 transitions. [2023-11-29 02:19:33,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 11.775) internal successors, (471), 40 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:33,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 35.0) internal successors, (1435), 41 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:33,527 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 35.0) internal successors, (1435), 41 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:33,527 INFO L175 Difference]: Start difference. First operand has 605 places, 760 transitions, 23751 flow. Second operand 40 states and 471 transitions. [2023-11-29 02:19:33,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 986 transitions, 28476 flow [2023-11-29 02:19:36,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 986 transitions, 27592 flow, removed 283 selfloop flow, removed 10 redundant places. [2023-11-29 02:19:36,733 INFO L231 Difference]: Finished difference. Result has 645 places, 794 transitions, 25200 flow [2023-11-29 02:19:36,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=22881, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=25200, PETRI_PLACES=645, PETRI_TRANSITIONS=794} [2023-11-29 02:19:36,734 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 614 predicate places. [2023-11-29 02:19:36,734 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 794 transitions, 25200 flow [2023-11-29 02:19:36,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:36,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:19:36,734 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:19:36,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-11-29 02:19:36,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:36,935 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:19:36,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:36,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1558814690, now seen corresponding path program 58 times [2023-11-29 02:19:36,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:36,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525508494] [2023-11-29 02:19:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:36,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:19:41,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:41,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525508494] [2023-11-29 02:19:41,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525508494] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:41,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740176620] [2023-11-29 02:19:41,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:19:41,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:41,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:41,849 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:41,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-29 02:19:42,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:19:42,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:19:42,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 02:19:42,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:43,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:19:43,984 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 326 treesize of output 274 [2023-11-29 02:19:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:19:45,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:19:48,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:19:48,343 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 384 treesize of output 362 [2023-11-29 02:19:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:19:50,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740176620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:19:50,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:19:50,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2023-11-29 02:19:50,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000692892] [2023-11-29 02:19:50,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:19:50,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:19:50,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:50,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:19:50,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:19:50,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:19:50,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 794 transitions, 25200 flow. Second operand has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:50,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:19:50,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:19:50,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:20:01,028 INFO L124 PetriNetUnfolderBase]: 7553/15053 cut-off events. [2023-11-29 02:20:01,028 INFO L125 PetriNetUnfolderBase]: For 686840/686840 co-relation queries the response was YES. [2023-11-29 02:20:01,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109478 conditions, 15053 events. 7553/15053 cut-off events. For 686840/686840 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 139490 event pairs, 3217 based on Foata normal form. 6/15021 useless extension candidates. Maximal degree in co-relation 109325. Up to 6770 conditions per place. [2023-11-29 02:20:01,391 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 757 selfloop transitions, 184 changer transitions 34/978 dead transitions. [2023-11-29 02:20:01,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 978 transitions, 29959 flow [2023-11-29 02:20:01,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 02:20:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 02:20:01,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 339 transitions. [2023-11-29 02:20:01,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37252747252747254 [2023-11-29 02:20:01,392 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 339 transitions. [2023-11-29 02:20:01,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 339 transitions. [2023-11-29 02:20:01,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:20:01,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 339 transitions. [2023-11-29 02:20:01,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 13.038461538461538) internal successors, (339), 26 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:01,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 35.0) internal successors, (945), 27 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:01,395 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 35.0) internal successors, (945), 27 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:01,395 INFO L175 Difference]: Start difference. First operand has 645 places, 794 transitions, 25200 flow. Second operand 26 states and 339 transitions. [2023-11-29 02:20:01,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 978 transitions, 29959 flow [2023-11-29 02:20:04,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 978 transitions, 29188 flow, removed 323 selfloop flow, removed 18 redundant places. [2023-11-29 02:20:05,000 INFO L231 Difference]: Finished difference. Result has 657 places, 820 transitions, 26048 flow [2023-11-29 02:20:05,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=24447, PETRI_DIFFERENCE_MINUEND_PLACES=625, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=26048, PETRI_PLACES=657, PETRI_TRANSITIONS=820} [2023-11-29 02:20:05,001 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 626 predicate places. [2023-11-29 02:20:05,001 INFO L495 AbstractCegarLoop]: Abstraction has has 657 places, 820 transitions, 26048 flow [2023-11-29 02:20:05,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:05,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:20:05,002 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:05,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-11-29 02:20:05,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-11-29 02:20:05,202 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:20:05,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:05,203 INFO L85 PathProgramCache]: Analyzing trace with hash 897699460, now seen corresponding path program 59 times [2023-11-29 02:20:05,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:05,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441260679] [2023-11-29 02:20:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:05,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:20:09,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:09,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441260679] [2023-11-29 02:20:09,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441260679] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:09,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437580687] [2023-11-29 02:20:09,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:20:09,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:09,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:20:09,840 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:20:09,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-29 02:20:10,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:20:10,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:20:10,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 02:20:10,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:12,619 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:20:12,620 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 357 treesize of output 297 [2023-11-29 02:20:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 02:20:13,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:20:17,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:20:17,561 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 446 treesize of output 411 [2023-11-29 02:20:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:20:20,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437580687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:20:20,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:20:20,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 29 [2023-11-29 02:20:20,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240039432] [2023-11-29 02:20:20,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:20:20,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:20:20,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:20,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:20:20,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:20:20,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:20:20,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 657 places, 820 transitions, 26048 flow. Second operand has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:20,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:20:20,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:20:20,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:20:38,651 INFO L124 PetriNetUnfolderBase]: 8131/16342 cut-off events. [2023-11-29 02:20:38,652 INFO L125 PetriNetUnfolderBase]: For 775499/775499 co-relation queries the response was YES. [2023-11-29 02:20:39,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119067 conditions, 16342 events. 8131/16342 cut-off events. For 775499/775499 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 153286 event pairs, 953 based on Foata normal form. 21/16321 useless extension candidates. Maximal degree in co-relation 118910. Up to 2808 conditions per place. [2023-11-29 02:20:39,084 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 468 selfloop transitions, 617 changer transitions 64/1152 dead transitions. [2023-11-29 02:20:39,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 1152 transitions, 32953 flow [2023-11-29 02:20:39,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-29 02:20:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-11-29 02:20:39,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 658 transitions. [2023-11-29 02:20:39,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3298245614035088 [2023-11-29 02:20:39,086 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 658 transitions. [2023-11-29 02:20:39,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 658 transitions. [2023-11-29 02:20:39,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:20:39,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 658 transitions. [2023-11-29 02:20:39,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 11.543859649122806) internal successors, (658), 57 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:39,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 35.0) internal successors, (2030), 58 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:39,089 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 35.0) internal successors, (2030), 58 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:39,089 INFO L175 Difference]: Start difference. First operand has 657 places, 820 transitions, 26048 flow. Second operand 57 states and 658 transitions. [2023-11-29 02:20:39,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 1152 transitions, 32953 flow [2023-11-29 02:20:43,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 1152 transitions, 32310 flow, removed 278 selfloop flow, removed 13 redundant places. [2023-11-29 02:20:43,082 INFO L231 Difference]: Finished difference. Result has 710 places, 889 transitions, 29716 flow [2023-11-29 02:20:43,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=25421, PETRI_DIFFERENCE_MINUEND_PLACES=644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=558, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=29716, PETRI_PLACES=710, PETRI_TRANSITIONS=889} [2023-11-29 02:20:43,083 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 679 predicate places. [2023-11-29 02:20:43,083 INFO L495 AbstractCegarLoop]: Abstraction has has 710 places, 889 transitions, 29716 flow [2023-11-29 02:20:43,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:43,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:20:43,083 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:43,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-11-29 02:20:43,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-11-29 02:20:43,284 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:20:43,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:43,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1228186812, now seen corresponding path program 60 times [2023-11-29 02:20:43,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:43,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101212523] [2023-11-29 02:20:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:43,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:20:47,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:47,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101212523] [2023-11-29 02:20:47,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101212523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:47,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963497387] [2023-11-29 02:20:47,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:20:47,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:47,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:20:47,437 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:20:47,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-11-29 02:20:48,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 02:20:48,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:20:48,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 02:20:48,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:49,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:20:49,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 272 [2023-11-29 02:20:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:20:50,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:20:54,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:20:54,191 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 411 treesize of output 389 [2023-11-29 02:20:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:20:56,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963497387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:20:56,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:20:56,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2023-11-29 02:20:56,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968132212] [2023-11-29 02:20:56,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:20:56,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:20:56,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:56,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:20:56,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:20:56,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:20:56,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 889 transitions, 29716 flow. Second operand has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:56,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:20:56,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:20:56,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:09,490 INFO L124 PetriNetUnfolderBase]: 8537/17048 cut-off events. [2023-11-29 02:21:09,490 INFO L125 PetriNetUnfolderBase]: For 883656/883656 co-relation queries the response was YES. [2023-11-29 02:21:09,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129612 conditions, 17048 events. 8537/17048 cut-off events. For 883656/883656 co-relation queries the response was YES. Maximal size of possible extension queue 1005. Compared 160542 event pairs, 2955 based on Foata normal form. 4/17010 useless extension candidates. Maximal degree in co-relation 129445. Up to 6059 conditions per place. [2023-11-29 02:21:09,962 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 770 selfloop transitions, 315 changer transitions 46/1134 dead transitions. [2023-11-29 02:21:09,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 739 places, 1134 transitions, 36226 flow [2023-11-29 02:21:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 02:21:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-29 02:21:09,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 433 transitions. [2023-11-29 02:21:09,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3638655462184874 [2023-11-29 02:21:09,964 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 433 transitions. [2023-11-29 02:21:09,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 433 transitions. [2023-11-29 02:21:09,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:09,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 433 transitions. [2023-11-29 02:21:09,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 12.735294117647058) internal successors, (433), 34 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:09,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 35.0) internal successors, (1225), 35 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:09,965 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 35.0) internal successors, (1225), 35 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:09,965 INFO L175 Difference]: Start difference. First operand has 710 places, 889 transitions, 29716 flow. Second operand 34 states and 433 transitions. [2023-11-29 02:21:09,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 739 places, 1134 transitions, 36226 flow [2023-11-29 02:21:14,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 722 places, 1134 transitions, 34396 flow, removed 648 selfloop flow, removed 17 redundant places. [2023-11-29 02:21:14,341 INFO L231 Difference]: Finished difference. Result has 735 places, 935 transitions, 30916 flow [2023-11-29 02:21:14,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=27990, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=30916, PETRI_PLACES=735, PETRI_TRANSITIONS=935} [2023-11-29 02:21:14,342 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 704 predicate places. [2023-11-29 02:21:14,342 INFO L495 AbstractCegarLoop]: Abstraction has has 735 places, 935 transitions, 30916 flow [2023-11-29 02:21:14,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:14,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:21:14,343 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:14,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-11-29 02:21:14,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-11-29 02:21:14,544 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:21:14,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash 311498756, now seen corresponding path program 61 times [2023-11-29 02:21:14,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:14,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351336193] [2023-11-29 02:21:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:14,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:21:18,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:18,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351336193] [2023-11-29 02:21:18,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351336193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:18,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874982481] [2023-11-29 02:21:18,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:21:18,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:18,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:18,870 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:18,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_335a8fc6-6b58-43df-a7a0-b1effd0a1e19/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-11-29 02:21:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:19,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 02:21:19,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:21,174 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:21:21,174 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 360 treesize of output 300 [2023-11-29 02:21:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:21:22,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:26,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:21:26,073 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 439 treesize of output 405 [2023-11-29 02:21:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:21:28,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874982481] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:21:28,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:21:28,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2023-11-29 02:21:28,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830919943] [2023-11-29 02:21:28,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:28,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 02:21:28,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:28,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 02:21:28,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2023-11-29 02:21:28,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 02:21:28,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 935 transitions, 30916 flow. Second operand has 27 states, 27 states have (on average 7.555555555555555) internal successors, (204), 27 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:28,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:21:28,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 02:21:28,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:21:42,951 INFO L124 PetriNetUnfolderBase]: 9247/18489 cut-off events. [2023-11-29 02:21:42,952 INFO L125 PetriNetUnfolderBase]: For 973245/973245 co-relation queries the response was YES. [2023-11-29 02:21:43,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140471 conditions, 18489 events. 9247/18489 cut-off events. For 973245/973245 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 175688 event pairs, 2775 based on Foata normal form. 16/18463 useless extension candidates. Maximal degree in co-relation 140298. Up to 5589 conditions per place. [2023-11-29 02:21:43,430 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 733 selfloop transitions, 427 changer transitions 50/1213 dead transitions. [2023-11-29 02:21:43,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 1213 transitions, 39140 flow [2023-11-29 02:21:43,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 02:21:43,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-29 02:21:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 438 transitions. [2023-11-29 02:21:43,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37922077922077924 [2023-11-29 02:21:43,432 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 438 transitions. [2023-11-29 02:21:43,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 438 transitions. [2023-11-29 02:21:43,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:21:43,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 438 transitions. [2023-11-29 02:21:43,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 13.272727272727273) internal successors, (438), 33 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:43,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 35.0) internal successors, (1190), 34 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:43,435 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 35.0) internal successors, (1190), 34 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:43,435 INFO L175 Difference]: Start difference. First operand has 735 places, 935 transitions, 30916 flow. Second operand 33 states and 438 transitions. [2023-11-29 02:21:43,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 765 places, 1213 transitions, 39140 flow