./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-4.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_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme --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 bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:40:55,890 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:40:56,004 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:40:56,010 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:40:56,011 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:40:56,038 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:40:56,039 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:40:56,040 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:40:56,040 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:40:56,041 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:40:56,042 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:40:56,043 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:40:56,044 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:40:56,044 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:40:56,045 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:40:56,046 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:40:56,046 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:40:56,047 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:40:56,047 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:40:56,048 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:40:56,048 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:40:56,049 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:40:56,050 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:40:56,050 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:40:56,051 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:40:56,051 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:40:56,051 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:40:56,052 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:40:56,053 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:40:56,053 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:40:56,054 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:40:56,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:40:56,054 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:40:56,055 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:40:56,055 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:40:56,055 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:40:56,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:40:56,056 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:40:56,056 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:40:56,057 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:40:56,057 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:40:56,057 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:40:56,058 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_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd [2023-11-26 10:40:56,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:40:56,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:40:56,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:40:56,441 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:40:56,441 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:40:56,443 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/unroll-4.wvr.c [2023-11-26 10:40:59,607 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:40:59,854 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:40:59,854 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/sv-benchmarks/c/weaver/unroll-4.wvr.c [2023-11-26 10:40:59,865 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/data/e5831bd4f/4ac5c6cc7f3a492486f18d2693968f14/FLAG8c5e58e93 [2023-11-26 10:40:59,884 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/data/e5831bd4f/4ac5c6cc7f3a492486f18d2693968f14 [2023-11-26 10:40:59,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:40:59,895 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:40:59,899 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:40:59,899 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:40:59,905 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:40:59,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:40:59" (1/1) ... [2023-11-26 10:40:59,907 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29386927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:59, skipping insertion in model container [2023-11-26 10:40:59,907 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:40:59" (1/1) ... [2023-11-26 10:40:59,937 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:41:00,156 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_08515e13-1e97-4de9-b1d9-289186321b12/sv-benchmarks/c/weaver/unroll-4.wvr.c[2598,2611] [2023-11-26 10:41:00,195 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:41:00,208 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:41:00,265 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_08515e13-1e97-4de9-b1d9-289186321b12/sv-benchmarks/c/weaver/unroll-4.wvr.c[2598,2611] [2023-11-26 10:41:00,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:41:00,286 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:41:00,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:00 WrapperNode [2023-11-26 10:41:00,287 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:41:00,288 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:41:00,288 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:41:00,288 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:41:00,297 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:00" (1/1) ... [2023-11-26 10:41:00,308 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:00" (1/1) ... [2023-11-26 10:41:00,342 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 159 [2023-11-26 10:41:00,342 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:41:00,343 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:41:00,343 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:41:00,343 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:41:00,355 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:00" (1/1) ... [2023-11-26 10:41:00,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:00" (1/1) ... [2023-11-26 10:41:00,360 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:00" (1/1) ... [2023-11-26 10:41:00,378 INFO L175 MemorySlicer]: Split 12 memory accesses to 4 slices as follows [2, 6, 2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-26 10:41:00,378 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:00" (1/1) ... [2023-11-26 10:41:00,379 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:00" (1/1) ... [2023-11-26 10:41:00,390 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:00" (1/1) ... [2023-11-26 10:41:00,395 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:00" (1/1) ... [2023-11-26 10:41:00,398 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:00" (1/1) ... [2023-11-26 10:41:00,400 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:00" (1/1) ... [2023-11-26 10:41:00,404 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:41:00,405 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:41:00,405 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:41:00,405 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:41:00,406 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:00" (1/1) ... [2023-11-26 10:41:00,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:41:00,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:00,454 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:41:00,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:41:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:41:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 10:41:00,514 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 10:41:00,514 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 10:41:00,514 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 10:41:00,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:41:00,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:41:00,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:41:00,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:41:00,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:41:00,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:41:00,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:41:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:41:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:41:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:41:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:41:00,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:41:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:41:00,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:41:00,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:41:00,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:41:00,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:41:00,524 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:41:00,711 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:41:00,714 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:41:01,117 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:41:01,497 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:41:01,498 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 10:41:01,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:41:01 BoogieIcfgContainer [2023-11-26 10:41:01,498 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:41:01,501 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:41:01,502 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:41:01,508 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:41:01,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:40:59" (1/3) ... [2023-11-26 10:41:01,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@364d52c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:41:01, skipping insertion in model container [2023-11-26 10:41:01,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:00" (2/3) ... [2023-11-26 10:41:01,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@364d52c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:41:01, skipping insertion in model container [2023-11-26 10:41:01,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:41:01" (3/3) ... [2023-11-26 10:41:01,511 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2023-11-26 10:41:01,521 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 10:41:01,534 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:41:01,534 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:41:01,534 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:41:01,584 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 10:41:01,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2023-11-26 10:41:01,656 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-26 10:41:01,656 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:41:01,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-26 10:41:01,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2023-11-26 10:41:01,664 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2023-11-26 10:41:01,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:41:01,683 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;@62e5b618, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:41:01,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 10:41:01,694 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:41:01,694 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-26 10:41:01,695 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:41:01,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:01,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:01,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:41:01,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:01,702 INFO L85 PathProgramCache]: Analyzing trace with hash 241863047, now seen corresponding path program 1 times [2023-11-26 10:41:01,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:01,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219553306] [2023-11-26 10:41:01,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:01,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:02,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:02,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219553306] [2023-11-26 10:41:02,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219553306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:02,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:02,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:41:02,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851753801] [2023-11-26 10:41:02,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:02,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:02,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:02,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:02,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:02,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 10:41:02,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:02,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:02,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 10:41:02,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:02,409 INFO L124 PetriNetUnfolderBase]: 75/137 cut-off events. [2023-11-26 10:41:02,410 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-26 10:41:02,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 137 events. 75/137 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 353 event pairs, 24 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-26 10:41:02,418 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 25 selfloop transitions, 3 changer transitions 1/30 dead transitions. [2023-11-26 10:41:02,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 139 flow [2023-11-26 10:41:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:41:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:41:02,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2023-11-26 10:41:02,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2023-11-26 10:41:02,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 39 transitions. [2023-11-26 10:41:02,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 39 transitions. [2023-11-26 10:41:02,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:02,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 39 transitions. [2023-11-26 10:41:02,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-26 10:41:02,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:02,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:02,453 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 39 transitions. [2023-11-26 10:41:02,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 139 flow [2023-11-26 10:41:02,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 30 transitions, 125 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 10:41:02,461 INFO L231 Difference]: Finished difference. Result has 21 places, 20 transitions, 59 flow [2023-11-26 10:41:02,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2023-11-26 10:41:02,471 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-11-26 10:41:02,472 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 59 flow [2023-11-26 10:41:02,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:02,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:02,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:02,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:41:02,473 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:41:02,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:02,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1615350276, now seen corresponding path program 1 times [2023-11-26 10:41:02,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:02,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116870838] [2023-11-26 10:41:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:02,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:02,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:02,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116870838] [2023-11-26 10:41:02,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116870838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:02,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:02,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:41:02,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028582689] [2023-11-26 10:41:02,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:02,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:02,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:02,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:02,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:02,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 10:41:02,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:02,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:02,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 10:41:02,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:02,940 INFO L124 PetriNetUnfolderBase]: 75/138 cut-off events. [2023-11-26 10:41:02,940 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-26 10:41:02,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 138 events. 75/138 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 338 event pairs, 48 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 120. Up to 137 conditions per place. [2023-11-26 10:41:02,945 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 18 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-26 10:41:02,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 101 flow [2023-11-26 10:41:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:41:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:41:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2023-11-26 10:41:02,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-26 10:41:02,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 28 transitions. [2023-11-26 10:41:02,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 28 transitions. [2023-11-26 10:41:02,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:02,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 28 transitions. [2023-11-26 10:41:02,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:02,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:02,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:02,958 INFO L175 Difference]: Start difference. First operand has 21 places, 20 transitions, 59 flow. Second operand 3 states and 28 transitions. [2023-11-26 10:41:02,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 101 flow [2023-11-26 10:41:02,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:02,963 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 68 flow [2023-11-26 10:41:02,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-26 10:41:02,965 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-11-26 10:41:02,970 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 68 flow [2023-11-26 10:41:02,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:02,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:02,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:02,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:41:02,972 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:41:02,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:02,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1075635653, now seen corresponding path program 1 times [2023-11-26 10:41:02,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:02,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340658261] [2023-11-26 10:41:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:02,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:03,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:03,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340658261] [2023-11-26 10:41:03,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340658261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:03,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008592102] [2023-11-26 10:41:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:03,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:03,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:03,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:03,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:41:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:03,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:41:03,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:03,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:03,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008592102] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:03,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:03,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-26 10:41:03,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374729084] [2023-11-26 10:41:03,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:03,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:41:03,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:03,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:41:03,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:41:03,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 10:41:03,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:03,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:03,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 10:41:03,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:03,830 INFO L124 PetriNetUnfolderBase]: 83/152 cut-off events. [2023-11-26 10:41:03,831 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-26 10:41:03,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 152 events. 83/152 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 415 event pairs, 24 based on Foata normal form. 6/157 useless extension candidates. Maximal degree in co-relation 348. Up to 78 conditions per place. [2023-11-26 10:41:03,833 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 31 selfloop transitions, 4 changer transitions 1/37 dead transitions. [2023-11-26 10:41:03,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 37 transitions, 180 flow [2023-11-26 10:41:03,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:41:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:41:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 48 transitions. [2023-11-26 10:41:03,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-26 10:41:03,836 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 48 transitions. [2023-11-26 10:41:03,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 48 transitions. [2023-11-26 10:41:03,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:03,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 48 transitions. [2023-11-26 10:41:03,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.0) internal successors, (48), 4 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) [2023-11-26 10:41:03,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:03,839 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:03,839 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 68 flow. Second operand 4 states and 48 transitions. [2023-11-26 10:41:03,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 37 transitions, 180 flow [2023-11-26 10:41:03,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 37 transitions, 176 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:03,843 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 90 flow [2023-11-26 10:41:03,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-11-26 10:41:03,844 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2023-11-26 10:41:03,844 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 90 flow [2023-11-26 10:41:03,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:03,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:03,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:03,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:41:04,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:04,052 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:41:04,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:04,053 INFO L85 PathProgramCache]: Analyzing trace with hash -417484849, now seen corresponding path program 1 times [2023-11-26 10:41:04,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:04,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394796055] [2023-11-26 10:41:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:04,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:04,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:04,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394796055] [2023-11-26 10:41:04,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394796055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:04,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:04,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:41:04,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679380914] [2023-11-26 10:41:04,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:04,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:41:04,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:04,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:41:04,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:41:04,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 10:41:04,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:04,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:04,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 10:41:04,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:04,452 INFO L124 PetriNetUnfolderBase]: 93/186 cut-off events. [2023-11-26 10:41:04,452 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-11-26 10:41:04,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 186 events. 93/186 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 628 event pairs, 26 based on Foata normal form. 12/197 useless extension candidates. Maximal degree in co-relation 492. Up to 101 conditions per place. [2023-11-26 10:41:04,455 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 33 selfloop transitions, 4 changer transitions 8/46 dead transitions. [2023-11-26 10:41:04,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 46 transitions, 255 flow [2023-11-26 10:41:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:41:04,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:41:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2023-11-26 10:41:04,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-26 10:41:04,458 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 56 transitions. [2023-11-26 10:41:04,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 56 transitions. [2023-11-26 10:41:04,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:04,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 56 transitions. [2023-11-26 10:41:04,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:04,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:04,461 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:04,461 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 90 flow. Second operand 5 states and 56 transitions. [2023-11-26 10:41:04,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 46 transitions, 255 flow [2023-11-26 10:41:04,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 250 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:04,465 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 117 flow [2023-11-26 10:41:04,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-11-26 10:41:04,467 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2023-11-26 10:41:04,467 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 117 flow [2023-11-26 10:41:04,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:04,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:04,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:04,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:41:04,468 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:41:04,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:04,469 INFO L85 PathProgramCache]: Analyzing trace with hash 946720349, now seen corresponding path program 2 times [2023-11-26 10:41:04,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:04,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089604888] [2023-11-26 10:41:04,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:04,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:04,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:04,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089604888] [2023-11-26 10:41:04,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089604888] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51008507] [2023-11-26 10:41:04,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:41:04,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:04,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:04,633 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:04,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:41:04,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:41:04,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:41:04,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:41:04,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:04,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:04,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51008507] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:04,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:04,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-26 10:41:04,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896061851] [2023-11-26 10:41:04,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:04,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:41:04,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:04,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:41:04,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:41:04,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 10:41:04,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 117 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:04,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:04,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 10:41:04,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:05,017 INFO L124 PetriNetUnfolderBase]: 93/181 cut-off events. [2023-11-26 10:41:05,017 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2023-11-26 10:41:05,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 181 events. 93/181 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 553 event pairs, 28 based on Foata normal form. 4/184 useless extension candidates. Maximal degree in co-relation 590. Up to 114 conditions per place. [2023-11-26 10:41:05,022 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 29 selfloop transitions, 4 changer transitions 4/38 dead transitions. [2023-11-26 10:41:05,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 242 flow [2023-11-26 10:41:05,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:41:05,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:41:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2023-11-26 10:41:05,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-11-26 10:41:05,025 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 46 transitions. [2023-11-26 10:41:05,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 46 transitions. [2023-11-26 10:41:05,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:05,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 46 transitions. [2023-11-26 10:41:05,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:05,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:05,028 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:05,028 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 117 flow. Second operand 4 states and 46 transitions. [2023-11-26 10:41:05,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 242 flow [2023-11-26 10:41:05,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 229 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-26 10:41:05,035 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 136 flow [2023-11-26 10:41:05,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-11-26 10:41:05,037 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-11-26 10:41:05,038 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 136 flow [2023-11-26 10:41:05,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:05,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:05,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:05,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:05,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:05,245 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:41:05,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:05,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1250643471, now seen corresponding path program 2 times [2023-11-26 10:41:05,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:05,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414078628] [2023-11-26 10:41:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:05,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:05,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:05,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414078628] [2023-11-26 10:41:05,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414078628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:05,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:05,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:41:05,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741864427] [2023-11-26 10:41:05,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:05,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:41:05,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:05,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:41:05,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:41:05,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 10:41:05,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:05,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:05,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 10:41:05,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:05,564 INFO L124 PetriNetUnfolderBase]: 103/204 cut-off events. [2023-11-26 10:41:05,565 INFO L125 PetriNetUnfolderBase]: For 306/306 co-relation queries the response was YES. [2023-11-26 10:41:05,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 204 events. 103/204 cut-off events. For 306/306 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 695 event pairs, 26 based on Foata normal form. 2/205 useless extension candidates. Maximal degree in co-relation 684. Up to 107 conditions per place. [2023-11-26 10:41:05,567 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 33 selfloop transitions, 9 changer transitions 10/53 dead transitions. [2023-11-26 10:41:05,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 355 flow [2023-11-26 10:41:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:41:05,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:41:05,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2023-11-26 10:41:05,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-26 10:41:05,569 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 63 transitions. [2023-11-26 10:41:05,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 63 transitions. [2023-11-26 10:41:05,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:05,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 63 transitions. [2023-11-26 10:41:05,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:05,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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) [2023-11-26 10:41:05,572 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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) [2023-11-26 10:41:05,572 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 136 flow. Second operand 6 states and 63 transitions. [2023-11-26 10:41:05,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 355 flow [2023-11-26 10:41:05,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:05,577 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 193 flow [2023-11-26 10:41:05,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-11-26 10:41:05,578 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 19 predicate places. [2023-11-26 10:41:05,578 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 193 flow [2023-11-26 10:41:05,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:05,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:05,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:05,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:41:05,579 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:41:05,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:05,580 INFO L85 PathProgramCache]: Analyzing trace with hash -483068471, now seen corresponding path program 3 times [2023-11-26 10:41:05,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:05,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378410182] [2023-11-26 10:41:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:05,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:05,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:05,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378410182] [2023-11-26 10:41:05,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378410182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:05,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324213395] [2023-11-26 10:41:05,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:41:05,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:05,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:05,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:05,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:41:05,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 10:41:05,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:41:05,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:41:05,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:05,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:06,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324213395] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:06,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:41:06,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-26 10:41:06,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366206693] [2023-11-26 10:41:06,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:06,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:41:06,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:06,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:41:06,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:41:06,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 10:41:06,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 193 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:06,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:06,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 10:41:06,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:06,211 INFO L124 PetriNetUnfolderBase]: 114/225 cut-off events. [2023-11-26 10:41:06,211 INFO L125 PetriNetUnfolderBase]: For 489/489 co-relation queries the response was YES. [2023-11-26 10:41:06,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 891 conditions, 225 events. 114/225 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 735 event pairs, 38 based on Foata normal form. 6/230 useless extension candidates. Maximal degree in co-relation 866. Up to 145 conditions per place. [2023-11-26 10:41:06,215 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 36 selfloop transitions, 13 changer transitions 4/54 dead transitions. [2023-11-26 10:41:06,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 419 flow [2023-11-26 10:41:06,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:41:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:41:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2023-11-26 10:41:06,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2023-11-26 10:41:06,217 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 57 transitions. [2023-11-26 10:41:06,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 57 transitions. [2023-11-26 10:41:06,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:06,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 57 transitions. [2023-11-26 10:41:06,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:06,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:06,221 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:06,221 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 193 flow. Second operand 5 states and 57 transitions. [2023-11-26 10:41:06,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 419 flow [2023-11-26 10:41:06,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 397 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-26 10:41:06,227 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 277 flow [2023-11-26 10:41:06,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-11-26 10:41:06,228 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-11-26 10:41:06,229 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 277 flow [2023-11-26 10:41:06,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:06,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:06,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:06,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:06,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:06,436 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:41:06,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:06,437 INFO L85 PathProgramCache]: Analyzing trace with hash -356751507, now seen corresponding path program 3 times [2023-11-26 10:41:06,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:06,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108117776] [2023-11-26 10:41:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:06,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:06,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:06,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108117776] [2023-11-26 10:41:06,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108117776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:06,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221990835] [2023-11-26 10:41:06,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:41:06,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:06,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:06,662 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:06,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:41:06,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 10:41:06,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:41:06,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:41:06,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:06,830 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:41:06,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221990835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:06,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:41:06,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-26 10:41:06,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306345481] [2023-11-26 10:41:06,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:06,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:41:06,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:06,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:41:06,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:41:06,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 10:41:06,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:06,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:06,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 10:41:06,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:06,977 INFO L124 PetriNetUnfolderBase]: 114/218 cut-off events. [2023-11-26 10:41:06,978 INFO L125 PetriNetUnfolderBase]: For 628/628 co-relation queries the response was YES. [2023-11-26 10:41:06,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 218 events. 114/218 cut-off events. For 628/628 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 712 event pairs, 34 based on Foata normal form. 4/221 useless extension candidates. Maximal degree in co-relation 956. Up to 149 conditions per place. [2023-11-26 10:41:06,982 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 31 selfloop transitions, 13 changer transitions 4/49 dead transitions. [2023-11-26 10:41:06,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 437 flow [2023-11-26 10:41:06,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:41:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:41:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2023-11-26 10:41:06,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-11-26 10:41:06,986 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 51 transitions. [2023-11-26 10:41:06,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 51 transitions. [2023-11-26 10:41:06,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:06,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 51 transitions. [2023-11-26 10:41:06,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:06,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:06,989 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:06,990 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 277 flow. Second operand 5 states and 51 transitions. [2023-11-26 10:41:06,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 437 flow [2023-11-26 10:41:06,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 418 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:06,996 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 306 flow [2023-11-26 10:41:06,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-11-26 10:41:06,999 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 27 predicate places. [2023-11-26 10:41:06,999 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 306 flow [2023-11-26 10:41:06,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:07,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:07,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:07,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:07,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:07,207 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:41:07,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:07,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1810524049, now seen corresponding path program 4 times [2023-11-26 10:41:07,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:07,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60115031] [2023-11-26 10:41:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:07,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:07,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:07,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60115031] [2023-11-26 10:41:07,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60115031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:07,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:07,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:41:07,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925277182] [2023-11-26 10:41:07,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:07,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:41:07,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:07,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:41:07,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:41:07,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 10:41:07,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:07,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:07,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 10:41:07,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:07,478 INFO L124 PetriNetUnfolderBase]: 100/182 cut-off events. [2023-11-26 10:41:07,478 INFO L125 PetriNetUnfolderBase]: For 748/748 co-relation queries the response was YES. [2023-11-26 10:41:07,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 182 events. 100/182 cut-off events. For 748/748 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 512 event pairs, 31 based on Foata normal form. 4/185 useless extension candidates. Maximal degree in co-relation 833. Up to 130 conditions per place. [2023-11-26 10:41:07,481 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 32 selfloop transitions, 9 changer transitions 4/46 dead transitions. [2023-11-26 10:41:07,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 441 flow [2023-11-26 10:41:07,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:41:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:41:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2023-11-26 10:41:07,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-26 10:41:07,483 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 45 transitions. [2023-11-26 10:41:07,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 45 transitions. [2023-11-26 10:41:07,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:07,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 45 transitions. [2023-11-26 10:41:07,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:07,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:07,485 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:07,485 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 306 flow. Second operand 5 states and 45 transitions. [2023-11-26 10:41:07,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 441 flow [2023-11-26 10:41:07,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 407 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-26 10:41:07,491 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 309 flow [2023-11-26 10:41:07,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2023-11-26 10:41:07,492 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 28 predicate places. [2023-11-26 10:41:07,492 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 309 flow [2023-11-26 10:41:07,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:07,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:07,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:07,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:41:07,493 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 10:41:07,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:07,494 INFO L85 PathProgramCache]: Analyzing trace with hash 680522526, now seen corresponding path program 1 times [2023-11-26 10:41:07,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:07,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930917112] [2023-11-26 10:41:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:07,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:41:07,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:07,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930917112] [2023-11-26 10:41:07,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930917112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:07,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173907172] [2023-11-26 10:41:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:07,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:07,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:07,654 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:07,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08515e13-1e97-4de9-b1d9-289186321b12/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:41:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:07,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-26 10:41:07,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:07,856 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 [2023-11-26 10:41:08,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:41:08,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 44 [2023-11-26 10:41:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:08,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:08,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 155 [2023-11-26 10:41:08,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:41:08,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 1265 treesize of output 989