./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:49:44,124 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:49:44,185 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:49:44,189 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:49:44,189 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:49:44,212 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:49:44,213 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:49:44,213 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:49:44,214 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:49:44,215 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:49:44,215 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:49:44,216 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:49:44,216 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:49:44,217 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:49:44,217 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:49:44,218 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:49:44,218 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:49:44,219 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:49:44,219 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:49:44,220 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:49:44,220 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:49:44,222 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:49:44,222 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:49:44,223 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:49:44,223 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:49:44,223 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:49:44,224 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:49:44,224 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:49:44,224 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:49:44,225 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:49:44,225 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:49:44,225 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:49:44,226 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:49:44,226 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:49:44,226 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:49:44,227 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:49:44,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:49:44,227 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:49:44,229 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:49:44,229 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:49:44,229 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:49:44,229 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:49:44,230 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_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2023-11-29 04:49:44,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:49:44,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:49:44,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:49:44,455 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:49:44,455 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:49:44,456 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-29 04:49:47,172 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:49:47,346 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:49:47,347 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-29 04:49:47,355 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/data/48cdb3c94/d7d401a8661b48fba066360bf895de9e/FLAG08ee3f18f [2023-11-29 04:49:47,370 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/data/48cdb3c94/d7d401a8661b48fba066360bf895de9e [2023-11-29 04:49:47,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:49:47,373 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:49:47,374 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:49:47,374 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:49:47,379 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:49:47,379 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:49:47" (1/1) ... [2023-11-29 04:49:47,380 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e76f6cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:49:47, skipping insertion in model container [2023-11-29 04:49:47,381 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:49:47" (1/1) ... [2023-11-29 04:49:47,403 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:49:47,554 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_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2820,2833] [2023-11-29 04:49:47,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:49:47,575 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:49:47,600 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_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2820,2833] [2023-11-29 04:49:47,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:49:47,618 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:49:47,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:49:47 WrapperNode [2023-11-29 04:49:47,618 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:49:47,619 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:49:47,619 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:49:47,619 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:49:47,625 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:49:47" (1/1) ... [2023-11-29 04:49:47,634 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:49:47" (1/1) ... [2023-11-29 04:49:47,666 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 292 [2023-11-29 04:49:47,666 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:49:47,667 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:49:47,667 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:49:47,667 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:49:47,678 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:49:47" (1/1) ... [2023-11-29 04:49:47,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:49:47" (1/1) ... [2023-11-29 04:49:47,684 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:49:47" (1/1) ... [2023-11-29 04:49:47,704 INFO L175 MemorySlicer]: Split 23 memory accesses to 5 slices as follows [2, 2, 2, 2, 15]. 65 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 1, 3]. [2023-11-29 04:49:47,704 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:49:47" (1/1) ... [2023-11-29 04:49:47,704 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:49:47" (1/1) ... [2023-11-29 04:49:47,717 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:49:47" (1/1) ... [2023-11-29 04:49:47,722 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:49:47" (1/1) ... [2023-11-29 04:49:47,725 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:49:47" (1/1) ... [2023-11-29 04:49:47,728 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:49:47" (1/1) ... [2023-11-29 04:49:47,732 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:49:47,733 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:49:47,734 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:49:47,734 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:49:47,735 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:49:47" (1/1) ... [2023-11-29 04:49:47,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:49:47,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:49:47,762 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:49:47,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:49:47,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:49:47,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:49:47,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:49:47,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:49:47,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 04:49:47,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 04:49:47,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 04:49:47,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:49:47,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:49:47,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 04:49:47,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 04:49:47,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 04:49:47,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 04:49:47,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 04:49:47,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 04:49:47,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 04:49:47,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 04:49:47,803 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 04:49:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:49:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:49:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 04:49:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 04:49:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 04:49:47,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 04:49:47,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:49:47,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:49:47,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:49:47,805 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 04:49:47,914 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:49:47,915 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:49:48,325 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:49:48,683 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:49:48,684 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 04:49:48,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:49:48 BoogieIcfgContainer [2023-11-29 04:49:48,684 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:49:48,687 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:49:48,687 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:49:48,690 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:49:48,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:49:47" (1/3) ... [2023-11-29 04:49:48,691 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cdf487b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:49:48, skipping insertion in model container [2023-11-29 04:49:48,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:49:47" (2/3) ... [2023-11-29 04:49:48,691 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cdf487b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:49:48, skipping insertion in model container [2023-11-29 04:49:48,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:49:48" (3/3) ... [2023-11-29 04:49:48,693 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2023-11-29 04:49:48,702 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 04:49:48,722 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:49:48,723 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:49:48,723 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 04:49:48,785 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 04:49:48,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 42 transitions, 105 flow [2023-11-29 04:49:48,855 INFO L124 PetriNetUnfolderBase]: 9/39 cut-off events. [2023-11-29 04:49:48,855 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 04:49:48,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 39 events. 9/39 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-29 04:49:48,859 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 42 transitions, 105 flow [2023-11-29 04:49:48,862 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 94 flow [2023-11-29 04:49:48,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:49:48,879 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;@29b67490, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:49:48,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 04:49:48,897 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 04:49:48,897 INFO L124 PetriNetUnfolderBase]: 9/37 cut-off events. [2023-11-29 04:49:48,897 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 04:49:48,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:49:48,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:49:48,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:49:48,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:49:48,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1310840306, now seen corresponding path program 1 times [2023-11-29 04:49:48,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:49:48,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403810179] [2023-11-29 04:49:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:49:48,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:49:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:49:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:49:49,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:49:49,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403810179] [2023-11-29 04:49:49,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403810179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:49:49,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:49:49,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:49:49,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819764867] [2023-11-29 04:49:49,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:49:49,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:49:49,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:49:49,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:49:49,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:49:49,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:49:49,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 94 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 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) [2023-11-29 04:49:49,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:49:49,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:49:49,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:49:50,905 INFO L124 PetriNetUnfolderBase]: 2963/4045 cut-off events. [2023-11-29 04:49:50,905 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2023-11-29 04:49:50,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8312 conditions, 4045 events. 2963/4045 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16424 event pairs, 268 based on Foata normal form. 1/2916 useless extension candidates. Maximal degree in co-relation 4518. Up to 1349 conditions per place. [2023-11-29 04:49:50,933 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 16 changer transitions 1/142 dead transitions. [2023-11-29 04:49:50,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 142 transitions, 632 flow [2023-11-29 04:49:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:49:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 04:49:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2023-11-29 04:49:50,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-29 04:49:50,947 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 182 transitions. [2023-11-29 04:49:50,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 182 transitions. [2023-11-29 04:49:50,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:49:50,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 182 transitions. [2023-11-29 04:49:50,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:50,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:50,957 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:50,958 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 94 flow. Second operand 10 states and 182 transitions. [2023-11-29 04:49:50,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 142 transitions, 632 flow [2023-11-29 04:49:50,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 142 transitions, 588 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 04:49:50,969 INFO L231 Difference]: Finished difference. Result has 46 places, 54 transitions, 182 flow [2023-11-29 04:49:50,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=182, PETRI_PLACES=46, PETRI_TRANSITIONS=54} [2023-11-29 04:49:50,974 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2023-11-29 04:49:50,974 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 54 transitions, 182 flow [2023-11-29 04:49:50,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 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) [2023-11-29 04:49:50,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:49:50,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:49:50,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:49:50,976 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:49:50,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:49:50,976 INFO L85 PathProgramCache]: Analyzing trace with hash 223476662, now seen corresponding path program 2 times [2023-11-29 04:49:50,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:49:50,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83306183] [2023-11-29 04:49:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:49:50,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:49:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:49:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:49:51,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:49:51,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83306183] [2023-11-29 04:49:51,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83306183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:49:51,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:49:51,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:49:51,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902234037] [2023-11-29 04:49:51,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:49:51,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:49:51,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:49:51,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:49:51,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:49:51,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:49:51,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 54 transitions, 182 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 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) [2023-11-29 04:49:51,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:49:51,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:49:51,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:49:52,274 INFO L124 PetriNetUnfolderBase]: 3361/4649 cut-off events. [2023-11-29 04:49:52,275 INFO L125 PetriNetUnfolderBase]: For 643/643 co-relation queries the response was YES. [2023-11-29 04:49:52,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10220 conditions, 4649 events. 3361/4649 cut-off events. For 643/643 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19798 event pairs, 1194 based on Foata normal form. 1/3818 useless extension candidates. Maximal degree in co-relation 10196. Up to 1985 conditions per place. [2023-11-29 04:49:52,298 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 116 selfloop transitions, 14 changer transitions 1/132 dead transitions. [2023-11-29 04:49:52,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 132 transitions, 627 flow [2023-11-29 04:49:52,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:49:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 04:49:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2023-11-29 04:49:52,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2023-11-29 04:49:52,301 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 164 transitions. [2023-11-29 04:49:52,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 164 transitions. [2023-11-29 04:49:52,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:49:52,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 164 transitions. [2023-11-29 04:49:52,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 18.22222222222222) internal successors, (164), 9 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:52,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:52,305 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:52,305 INFO L175 Difference]: Start difference. First operand has 46 places, 54 transitions, 182 flow. Second operand 9 states and 164 transitions. [2023-11-29 04:49:52,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 132 transitions, 627 flow [2023-11-29 04:49:52,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 132 transitions, 621 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-29 04:49:52,311 INFO L231 Difference]: Finished difference. Result has 55 places, 57 transitions, 227 flow [2023-11-29 04:49:52,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=227, PETRI_PLACES=55, PETRI_TRANSITIONS=57} [2023-11-29 04:49:52,312 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 16 predicate places. [2023-11-29 04:49:52,312 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 57 transitions, 227 flow [2023-11-29 04:49:52,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 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) [2023-11-29 04:49:52,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:49:52,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:49:52,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:49:52,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:49:52,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:49:52,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1310299412, now seen corresponding path program 1 times [2023-11-29 04:49:52,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:49:52,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298990273] [2023-11-29 04:49:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:49:52,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:49:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:49:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:49:52,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:49:52,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298990273] [2023-11-29 04:49:52,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298990273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:49:52,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144184169] [2023-11-29 04:49:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:49:52,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:49:52,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:49:52,470 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:49:52,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:49:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:49:52,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:49:52,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:49:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:49:52,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:49:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:49:52,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144184169] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:49:52,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:49:52,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-11-29 04:49:52,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110452357] [2023-11-29 04:49:52,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:49:52,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:49:52,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:49:52,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:49:52,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:49:52,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:49:52,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 57 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:52,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:49:52,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:49:52,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:49:53,692 INFO L124 PetriNetUnfolderBase]: 4810/6659 cut-off events. [2023-11-29 04:49:53,692 INFO L125 PetriNetUnfolderBase]: For 1906/1906 co-relation queries the response was YES. [2023-11-29 04:49:53,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15462 conditions, 6659 events. 4810/6659 cut-off events. For 1906/1906 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 30023 event pairs, 2572 based on Foata normal form. 1/5505 useless extension candidates. Maximal degree in co-relation 15428. Up to 3223 conditions per place. [2023-11-29 04:49:53,739 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 128 selfloop transitions, 8 changer transitions 7/144 dead transitions. [2023-11-29 04:49:53,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 144 transitions, 756 flow [2023-11-29 04:49:53,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:49:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 04:49:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2023-11-29 04:49:53,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2023-11-29 04:49:53,742 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 155 transitions. [2023-11-29 04:49:53,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 155 transitions. [2023-11-29 04:49:53,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:49:53,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 155 transitions. [2023-11-29 04:49:53,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:53,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:53,745 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:53,745 INFO L175 Difference]: Start difference. First operand has 55 places, 57 transitions, 227 flow. Second operand 6 states and 155 transitions. [2023-11-29 04:49:53,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 144 transitions, 756 flow [2023-11-29 04:49:53,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 144 transitions, 738 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 04:49:53,759 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 244 flow [2023-11-29 04:49:53,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2023-11-29 04:49:53,760 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2023-11-29 04:49:53,760 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 244 flow [2023-11-29 04:49:53,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:53,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:49:53,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:49:53,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:49:53,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 04:49:53,962 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:49:53,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:49:53,962 INFO L85 PathProgramCache]: Analyzing trace with hash 56937492, now seen corresponding path program 1 times [2023-11-29 04:49:53,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:49:53,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018891441] [2023-11-29 04:49:53,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:49:53,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:49:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:49:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:49:54,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:49:54,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018891441] [2023-11-29 04:49:54,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018891441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:49:54,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:49:54,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:49:54,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114702358] [2023-11-29 04:49:54,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:49:54,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:49:54,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:49:54,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:49:54,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:49:54,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:49:54,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 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) [2023-11-29 04:49:54,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:49:54,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:49:54,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:49:54,669 INFO L124 PetriNetUnfolderBase]: 3995/5695 cut-off events. [2023-11-29 04:49:54,670 INFO L125 PetriNetUnfolderBase]: For 1713/1713 co-relation queries the response was YES. [2023-11-29 04:49:54,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13486 conditions, 5695 events. 3995/5695 cut-off events. For 1713/1713 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26677 event pairs, 1336 based on Foata normal form. 0/5091 useless extension candidates. Maximal degree in co-relation 11780. Up to 3496 conditions per place. [2023-11-29 04:49:54,696 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 98 selfloop transitions, 8 changer transitions 0/107 dead transitions. [2023-11-29 04:49:54,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 107 transitions, 590 flow [2023-11-29 04:49:54,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:49:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:49:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2023-11-29 04:49:54,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2023-11-29 04:49:54,698 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 108 transitions. [2023-11-29 04:49:54,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 108 transitions. [2023-11-29 04:49:54,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:49:54,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 108 transitions. [2023-11-29 04:49:54,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:54,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:54,701 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:54,701 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 244 flow. Second operand 5 states and 108 transitions. [2023-11-29 04:49:54,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 107 transitions, 590 flow [2023-11-29 04:49:54,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 107 transitions, 566 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-29 04:49:54,709 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 237 flow [2023-11-29 04:49:54,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2023-11-29 04:49:54,710 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2023-11-29 04:49:54,710 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 237 flow [2023-11-29 04:49:54,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 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) [2023-11-29 04:49:54,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:49:54,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:49:54,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 04:49:54,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:49:54,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:49:54,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1846353436, now seen corresponding path program 1 times [2023-11-29 04:49:54,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:49:54,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316881050] [2023-11-29 04:49:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:49:54,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:49:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:49:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:49:55,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:49:55,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316881050] [2023-11-29 04:49:55,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316881050] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:49:55,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610660899] [2023-11-29 04:49:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:49:55,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:49:55,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:49:55,082 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:49:55,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:49:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:49:55,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:49:55,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:49:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:49:55,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:49:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:49:55,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610660899] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:49:55,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:49:55,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2023-11-29 04:49:55,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514326028] [2023-11-29 04:49:55,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:49:55,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:49:55,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:49:55,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:49:55,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:49:55,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:49:55,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 237 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:55,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:49:55,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:49:55,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:49:56,739 INFO L124 PetriNetUnfolderBase]: 4365/6218 cut-off events. [2023-11-29 04:49:56,739 INFO L125 PetriNetUnfolderBase]: For 2946/2946 co-relation queries the response was YES. [2023-11-29 04:49:56,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15034 conditions, 6218 events. 4365/6218 cut-off events. For 2946/2946 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 30004 event pairs, 672 based on Foata normal form. 1/5553 useless extension candidates. Maximal degree in co-relation 13511. Up to 2699 conditions per place. [2023-11-29 04:49:56,773 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 158 selfloop transitions, 17 changer transitions 4/180 dead transitions. [2023-11-29 04:49:56,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 180 transitions, 937 flow [2023-11-29 04:49:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 04:49:56,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 04:49:56,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2023-11-29 04:49:56,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2023-11-29 04:49:56,775 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 216 transitions. [2023-11-29 04:49:56,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 216 transitions. [2023-11-29 04:49:56,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:49:56,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 216 transitions. [2023-11-29 04:49:56,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 19.636363636363637) internal successors, (216), 11 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:56,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 42.0) internal successors, (504), 12 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:56,778 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 42.0) internal successors, (504), 12 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:56,779 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 237 flow. Second operand 11 states and 216 transitions. [2023-11-29 04:49:56,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 180 transitions, 937 flow [2023-11-29 04:49:56,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 180 transitions, 924 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-29 04:49:56,787 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 306 flow [2023-11-29 04:49:56,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=306, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-11-29 04:49:56,788 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 29 predicate places. [2023-11-29 04:49:56,788 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 306 flow [2023-11-29 04:49:56,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:56,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:49:56,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:49:56,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 04:49:56,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:49:56,994 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:49:56,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:49:56,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1950822736, now seen corresponding path program 2 times [2023-11-29 04:49:56,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:49:56,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734384012] [2023-11-29 04:49:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:49:56,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:49:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:49:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:49:57,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:49:57,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734384012] [2023-11-29 04:49:57,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734384012] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:49:57,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568643325] [2023-11-29 04:49:57,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:49:57,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:49:57,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:49:57,336 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:49:57,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:49:57,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 04:49:57,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:49:57,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 04:49:57,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:49:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:49:57,731 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:49:57,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568643325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:49:57,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:49:57,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2023-11-29 04:49:57,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991648218] [2023-11-29 04:49:57,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:49:57,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:49:57,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:49:57,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:49:57,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:49:57,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:49:57,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 306 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:57,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:49:57,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:49:57,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:49:58,616 INFO L124 PetriNetUnfolderBase]: 5439/7910 cut-off events. [2023-11-29 04:49:58,617 INFO L125 PetriNetUnfolderBase]: For 6250/6250 co-relation queries the response was YES. [2023-11-29 04:49:58,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19995 conditions, 7910 events. 5439/7910 cut-off events. For 6250/6250 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 40872 event pairs, 1520 based on Foata normal form. 1/7137 useless extension candidates. Maximal degree in co-relation 16590. Up to 2833 conditions per place. [2023-11-29 04:49:58,647 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 145 selfloop transitions, 28 changer transitions 2/176 dead transitions. [2023-11-29 04:49:58,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 176 transitions, 1053 flow [2023-11-29 04:49:58,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:49:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 04:49:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2023-11-29 04:49:58,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2023-11-29 04:49:58,649 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 188 transitions. [2023-11-29 04:49:58,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 188 transitions. [2023-11-29 04:49:58,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:49:58,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 188 transitions. [2023-11-29 04:49:58,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 18.8) internal successors, (188), 10 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:58,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:58,652 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:58,652 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 306 flow. Second operand 10 states and 188 transitions. [2023-11-29 04:49:58,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 176 transitions, 1053 flow [2023-11-29 04:49:58,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 176 transitions, 1015 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-29 04:49:58,666 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 566 flow [2023-11-29 04:49:58,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=566, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2023-11-29 04:49:58,667 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 39 predicate places. [2023-11-29 04:49:58,667 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 566 flow [2023-11-29 04:49:58,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:58,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:49:58,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:49:58,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:49:58,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 04:49:58,870 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:49:58,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:49:58,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1662976186, now seen corresponding path program 1 times [2023-11-29 04:49:58,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:49:58,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901709563] [2023-11-29 04:49:58,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:49:58,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:49:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:49:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:49:58,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:49:58,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901709563] [2023-11-29 04:49:58,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901709563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:49:58,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:49:58,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:49:58,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26004141] [2023-11-29 04:49:58,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:49:58,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:49:58,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:49:58,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:49:58,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:49:58,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:49:58,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 566 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 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) [2023-11-29 04:49:58,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:49:58,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:49:58,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:49:59,639 INFO L124 PetriNetUnfolderBase]: 4686/6947 cut-off events. [2023-11-29 04:49:59,640 INFO L125 PetriNetUnfolderBase]: For 9104/9104 co-relation queries the response was YES. [2023-11-29 04:49:59,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18806 conditions, 6947 events. 4686/6947 cut-off events. For 9104/9104 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 36048 event pairs, 1905 based on Foata normal form. 0/6388 useless extension candidates. Maximal degree in co-relation 16523. Up to 3030 conditions per place. [2023-11-29 04:49:59,667 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 101 selfloop transitions, 14 changer transitions 14/130 dead transitions. [2023-11-29 04:49:59,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 130 transitions, 935 flow [2023-11-29 04:49:59,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:49:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 04:49:59,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2023-11-29 04:49:59,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-29 04:49:59,669 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 112 transitions. [2023-11-29 04:49:59,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 112 transitions. [2023-11-29 04:49:59,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:49:59,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 112 transitions. [2023-11-29 04:49:59,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:59,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:59,671 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:49:59,671 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 566 flow. Second operand 6 states and 112 transitions. [2023-11-29 04:49:59,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 130 transitions, 935 flow [2023-11-29 04:49:59,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 130 transitions, 905 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-29 04:49:59,740 INFO L231 Difference]: Finished difference. Result has 84 places, 69 transitions, 425 flow [2023-11-29 04:49:59,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=425, PETRI_PLACES=84, PETRI_TRANSITIONS=69} [2023-11-29 04:49:59,741 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 45 predicate places. [2023-11-29 04:49:59,741 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 425 flow [2023-11-29 04:49:59,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 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) [2023-11-29 04:49:59,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:49:59,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:49:59,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 04:49:59,742 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:49:59,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:49:59,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1855644100, now seen corresponding path program 1 times [2023-11-29 04:49:59,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:49:59,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164736889] [2023-11-29 04:49:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:49:59,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:49:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:49:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:49:59,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:49:59,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164736889] [2023-11-29 04:49:59,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164736889] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:49:59,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335947148] [2023-11-29 04:49:59,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:49:59,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:49:59,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:49:59,894 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:49:59,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:50:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:00,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:50:00,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:50:00,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:50:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:50:00,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335947148] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:00,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:50:00,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-11-29 04:50:00,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617639475] [2023-11-29 04:50:00,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:00,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:50:00,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:00,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:50:00,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:50:00,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:00,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 69 transitions, 425 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:00,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:00,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:00,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:00,923 INFO L124 PetriNetUnfolderBase]: 3502/5087 cut-off events. [2023-11-29 04:50:00,923 INFO L125 PetriNetUnfolderBase]: For 5910/5910 co-relation queries the response was YES. [2023-11-29 04:50:00,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13673 conditions, 5087 events. 3502/5087 cut-off events. For 5910/5910 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 23671 event pairs, 2122 based on Foata normal form. 1/4731 useless extension candidates. Maximal degree in co-relation 13640. Up to 2172 conditions per place. [2023-11-29 04:50:00,953 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 135 selfloop transitions, 9 changer transitions 8/153 dead transitions. [2023-11-29 04:50:00,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 153 transitions, 1045 flow [2023-11-29 04:50:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:50:00,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:50:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2023-11-29 04:50:00,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2023-11-29 04:50:00,955 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 150 transitions. [2023-11-29 04:50:00,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 150 transitions. [2023-11-29 04:50:00,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:00,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 150 transitions. [2023-11-29 04:50:00,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:00,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:00,957 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:00,957 INFO L175 Difference]: Start difference. First operand has 84 places, 69 transitions, 425 flow. Second operand 7 states and 150 transitions. [2023-11-29 04:50:00,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 153 transitions, 1045 flow [2023-11-29 04:50:00,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 153 transitions, 990 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-11-29 04:50:00,983 INFO L231 Difference]: Finished difference. Result has 81 places, 72 transitions, 446 flow [2023-11-29 04:50:00,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=446, PETRI_PLACES=81, PETRI_TRANSITIONS=72} [2023-11-29 04:50:00,984 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 42 predicate places. [2023-11-29 04:50:00,985 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 72 transitions, 446 flow [2023-11-29 04:50:00,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:00,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:00,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:00,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:50:01,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:01,187 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:01,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:01,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1190887606, now seen corresponding path program 1 times [2023-11-29 04:50:01,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:01,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668244494] [2023-11-29 04:50:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:01,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:50:01,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:01,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668244494] [2023-11-29 04:50:01,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668244494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:50:01,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:50:01,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:50:01,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351002270] [2023-11-29 04:50:01,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:01,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:50:01,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:01,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:50:01,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:50:01,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:01,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 72 transitions, 446 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:01,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:01,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:01,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:01,825 INFO L124 PetriNetUnfolderBase]: 2791/4048 cut-off events. [2023-11-29 04:50:01,825 INFO L125 PetriNetUnfolderBase]: For 5062/5062 co-relation queries the response was YES. [2023-11-29 04:50:01,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11075 conditions, 4048 events. 2791/4048 cut-off events. For 5062/5062 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18068 event pairs, 1510 based on Foata normal form. 0/3772 useless extension candidates. Maximal degree in co-relation 11037. Up to 2912 conditions per place. [2023-11-29 04:50:01,840 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 51 selfloop transitions, 2 changer transitions 55/109 dead transitions. [2023-11-29 04:50:01,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 109 transitions, 780 flow [2023-11-29 04:50:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:50:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:50:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2023-11-29 04:50:01,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2023-11-29 04:50:01,841 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 101 transitions. [2023-11-29 04:50:01,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 101 transitions. [2023-11-29 04:50:01,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:01,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 101 transitions. [2023-11-29 04:50:01,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:01,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:01,843 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:01,843 INFO L175 Difference]: Start difference. First operand has 81 places, 72 transitions, 446 flow. Second operand 5 states and 101 transitions. [2023-11-29 04:50:01,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 109 transitions, 780 flow [2023-11-29 04:50:01,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 725 flow, removed 9 selfloop flow, removed 10 redundant places. [2023-11-29 04:50:01,854 INFO L231 Difference]: Finished difference. Result has 75 places, 54 transitions, 257 flow [2023-11-29 04:50:01,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=75, PETRI_TRANSITIONS=54} [2023-11-29 04:50:01,855 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 36 predicate places. [2023-11-29 04:50:01,855 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 54 transitions, 257 flow [2023-11-29 04:50:01,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:01,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:01,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:01,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 04:50:01,856 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:01,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:01,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1783516888, now seen corresponding path program 1 times [2023-11-29 04:50:01,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:01,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889707911] [2023-11-29 04:50:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:01,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:50:01,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:01,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889707911] [2023-11-29 04:50:01,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889707911] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:01,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832628977] [2023-11-29 04:50:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:01,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:01,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:01,992 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:01,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:50:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:02,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:50:02,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:50:02,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:50:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:50:02,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832628977] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:02,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:50:02,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 12 [2023-11-29 04:50:02,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997855843] [2023-11-29 04:50:02,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:02,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:50:02,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:02,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:50:02,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:50:02,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:02,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 54 transitions, 257 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:02,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:02,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:02,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:02,786 INFO L124 PetriNetUnfolderBase]: 2645/3740 cut-off events. [2023-11-29 04:50:02,786 INFO L125 PetriNetUnfolderBase]: For 3128/3128 co-relation queries the response was YES. [2023-11-29 04:50:02,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9773 conditions, 3740 events. 2645/3740 cut-off events. For 3128/3128 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15612 event pairs, 1108 based on Foata normal form. 62/3597 useless extension candidates. Maximal degree in co-relation 9752. Up to 1180 conditions per place. [2023-11-29 04:50:02,802 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 112 selfloop transitions, 11 changer transitions 7/131 dead transitions. [2023-11-29 04:50:02,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 131 transitions, 777 flow [2023-11-29 04:50:02,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:50:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 04:50:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2023-11-29 04:50:02,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-11-29 04:50:02,803 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 147 transitions. [2023-11-29 04:50:02,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 147 transitions. [2023-11-29 04:50:02,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:02,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 147 transitions. [2023-11-29 04:50:02,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:02,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:02,805 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:02,805 INFO L175 Difference]: Start difference. First operand has 75 places, 54 transitions, 257 flow. Second operand 8 states and 147 transitions. [2023-11-29 04:50:02,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 131 transitions, 777 flow [2023-11-29 04:50:02,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 131 transitions, 717 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-11-29 04:50:02,812 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 265 flow [2023-11-29 04:50:02,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=265, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-11-29 04:50:02,813 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 22 predicate places. [2023-11-29 04:50:02,813 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 265 flow [2023-11-29 04:50:02,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:02,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:02,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:02,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:50:03,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:50:03,014 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:03,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:03,014 INFO L85 PathProgramCache]: Analyzing trace with hash -831941962, now seen corresponding path program 1 times [2023-11-29 04:50:03,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:03,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375577302] [2023-11-29 04:50:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:03,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:50:03,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:03,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375577302] [2023-11-29 04:50:03,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375577302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:50:03,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:50:03,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:50:03,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751779545] [2023-11-29 04:50:03,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:03,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:50:03,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:03,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:50:03,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:50:03,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:03,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 265 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:03,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:03,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:03,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:03,455 INFO L124 PetriNetUnfolderBase]: 2143/3031 cut-off events. [2023-11-29 04:50:03,455 INFO L125 PetriNetUnfolderBase]: For 2373/2373 co-relation queries the response was YES. [2023-11-29 04:50:03,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7761 conditions, 3031 events. 2143/3031 cut-off events. For 2373/2373 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11868 event pairs, 1232 based on Foata normal form. 52/2752 useless extension candidates. Maximal degree in co-relation 7747. Up to 2246 conditions per place. [2023-11-29 04:50:03,463 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 43 selfloop transitions, 2 changer transitions 47/93 dead transitions. [2023-11-29 04:50:03,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 93 transitions, 545 flow [2023-11-29 04:50:03,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:50:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 04:50:03,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2023-11-29 04:50:03,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-29 04:50:03,464 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 105 transitions. [2023-11-29 04:50:03,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 105 transitions. [2023-11-29 04:50:03,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:03,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 105 transitions. [2023-11-29 04:50:03,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.5) internal successors, (105), 6 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) [2023-11-29 04:50:03,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:03,466 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:03,466 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 265 flow. Second operand 6 states and 105 transitions. [2023-11-29 04:50:03,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 93 transitions, 545 flow [2023-11-29 04:50:03,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 93 transitions, 530 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-29 04:50:03,469 INFO L231 Difference]: Finished difference. Result has 61 places, 46 transitions, 180 flow [2023-11-29 04:50:03,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=180, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2023-11-29 04:50:03,470 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 22 predicate places. [2023-11-29 04:50:03,470 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 180 flow [2023-11-29 04:50:03,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:03,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:03,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:03,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 04:50:03,471 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:03,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:03,471 INFO L85 PathProgramCache]: Analyzing trace with hash 107735912, now seen corresponding path program 1 times [2023-11-29 04:50:03,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:03,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271952341] [2023-11-29 04:50:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:03,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:03,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:03,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271952341] [2023-11-29 04:50:03,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271952341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:50:03,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:50:03,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:50:03,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163845575] [2023-11-29 04:50:03,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:03,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:50:03,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:03,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:50:03,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:50:03,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:03,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 46 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:03,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:03,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:03,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:03,881 INFO L124 PetriNetUnfolderBase]: 1620/2246 cut-off events. [2023-11-29 04:50:03,881 INFO L125 PetriNetUnfolderBase]: For 1305/1305 co-relation queries the response was YES. [2023-11-29 04:50:03,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5592 conditions, 2246 events. 1620/2246 cut-off events. For 1305/1305 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8334 event pairs, 548 based on Foata normal form. 1/2013 useless extension candidates. Maximal degree in co-relation 5579. Up to 1298 conditions per place. [2023-11-29 04:50:03,888 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 60 selfloop transitions, 3 changer transitions 26/90 dead transitions. [2023-11-29 04:50:03,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 90 transitions, 493 flow [2023-11-29 04:50:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:50:03,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:50:03,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2023-11-29 04:50:03,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2023-11-29 04:50:03,890 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 94 transitions. [2023-11-29 04:50:03,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 94 transitions. [2023-11-29 04:50:03,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:03,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 94 transitions. [2023-11-29 04:50:03,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:03,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:03,891 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:03,891 INFO L175 Difference]: Start difference. First operand has 61 places, 46 transitions, 180 flow. Second operand 4 states and 94 transitions. [2023-11-29 04:50:03,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 90 transitions, 493 flow [2023-11-29 04:50:03,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 90 transitions, 460 flow, removed 13 selfloop flow, removed 7 redundant places. [2023-11-29 04:50:03,895 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 165 flow [2023-11-29 04:50:03,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-11-29 04:50:03,895 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 11 predicate places. [2023-11-29 04:50:03,896 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 165 flow [2023-11-29 04:50:03,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:03,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:03,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:03,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 04:50:03,897 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:03,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:03,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1446056824, now seen corresponding path program 1 times [2023-11-29 04:50:03,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:03,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77480428] [2023-11-29 04:50:03,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:03,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:50:04,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:04,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77480428] [2023-11-29 04:50:04,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77480428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:04,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774597322] [2023-11-29 04:50:04,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:04,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:04,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:04,244 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:04,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:50:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:04,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 04:50:04,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:50:04,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:50:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:50:04,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774597322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:50:04,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:50:04,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-29 04:50:04,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219410887] [2023-11-29 04:50:04,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:50:04,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 04:50:04,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 04:50:04,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2023-11-29 04:50:04,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:04,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 165 flow. Second operand has 25 states, 25 states have (on average 7.44) internal successors, (186), 25 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:04,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:04,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:04,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:07,109 INFO L124 PetriNetUnfolderBase]: 7757/10734 cut-off events. [2023-11-29 04:50:07,109 INFO L125 PetriNetUnfolderBase]: For 7730/7730 co-relation queries the response was YES. [2023-11-29 04:50:07,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27178 conditions, 10734 events. 7757/10734 cut-off events. For 7730/7730 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 52362 event pairs, 530 based on Foata normal form. 4/9096 useless extension candidates. Maximal degree in co-relation 27168. Up to 1512 conditions per place. [2023-11-29 04:50:07,148 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 347 selfloop transitions, 61 changer transitions 4/413 dead transitions. [2023-11-29 04:50:07,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 413 transitions, 2165 flow [2023-11-29 04:50:07,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 04:50:07,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 04:50:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 526 transitions. [2023-11-29 04:50:07,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3913690476190476 [2023-11-29 04:50:07,152 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 526 transitions. [2023-11-29 04:50:07,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 526 transitions. [2023-11-29 04:50:07,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:07,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 526 transitions. [2023-11-29 04:50:07,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 16.4375) internal successors, (526), 32 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:07,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 42.0) internal successors, (1386), 33 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:07,157 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 42.0) internal successors, (1386), 33 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:07,157 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 165 flow. Second operand 32 states and 526 transitions. [2023-11-29 04:50:07,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 413 transitions, 2165 flow [2023-11-29 04:50:07,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 413 transitions, 2069 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-29 04:50:07,169 INFO L231 Difference]: Finished difference. Result has 92 places, 100 transitions, 639 flow [2023-11-29 04:50:07,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=639, PETRI_PLACES=92, PETRI_TRANSITIONS=100} [2023-11-29 04:50:07,170 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 53 predicate places. [2023-11-29 04:50:07,170 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 100 transitions, 639 flow [2023-11-29 04:50:07,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.44) internal successors, (186), 25 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:07,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:07,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:07,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:50:07,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 04:50:07,371 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:07,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:07,371 INFO L85 PathProgramCache]: Analyzing trace with hash -930874366, now seen corresponding path program 2 times [2023-11-29 04:50:07,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:07,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913342685] [2023-11-29 04:50:07,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:07,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:07,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:07,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913342685] [2023-11-29 04:50:07,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913342685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:07,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069906654] [2023-11-29 04:50:07,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:50:07,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:07,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:07,705 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:07,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:50:07,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 04:50:07,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:50:07,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:50:07,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:50:07,976 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:50:07,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069906654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:50:07,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:50:07,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2023-11-29 04:50:07,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163778822] [2023-11-29 04:50:07,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:07,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:50:07,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:07,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:50:07,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:50:07,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:07,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 100 transitions, 639 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:07,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:07,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:07,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:09,286 INFO L124 PetriNetUnfolderBase]: 9589/13278 cut-off events. [2023-11-29 04:50:09,286 INFO L125 PetriNetUnfolderBase]: For 25995/25995 co-relation queries the response was YES. [2023-11-29 04:50:09,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38540 conditions, 13278 events. 9589/13278 cut-off events. For 25995/25995 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 67700 event pairs, 1224 based on Foata normal form. 2/11906 useless extension candidates. Maximal degree in co-relation 38516. Up to 5472 conditions per place. [2023-11-29 04:50:09,344 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 156 selfloop transitions, 37 changer transitions 1/195 dead transitions. [2023-11-29 04:50:09,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 195 transitions, 1372 flow [2023-11-29 04:50:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:50:09,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 04:50:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2023-11-29 04:50:09,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2023-11-29 04:50:09,346 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 181 transitions. [2023-11-29 04:50:09,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 181 transitions. [2023-11-29 04:50:09,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:09,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 181 transitions. [2023-11-29 04:50:09,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:09,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:09,347 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:09,348 INFO L175 Difference]: Start difference. First operand has 92 places, 100 transitions, 639 flow. Second operand 10 states and 181 transitions. [2023-11-29 04:50:09,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 195 transitions, 1372 flow [2023-11-29 04:50:09,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 195 transitions, 1299 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-11-29 04:50:09,406 INFO L231 Difference]: Finished difference. Result has 99 places, 107 transitions, 758 flow [2023-11-29 04:50:09,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=758, PETRI_PLACES=99, PETRI_TRANSITIONS=107} [2023-11-29 04:50:09,407 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 60 predicate places. [2023-11-29 04:50:09,407 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 107 transitions, 758 flow [2023-11-29 04:50:09,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:09,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:09,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:09,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:50:09,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 04:50:09,608 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:09,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:09,608 INFO L85 PathProgramCache]: Analyzing trace with hash 152179292, now seen corresponding path program 3 times [2023-11-29 04:50:09,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:09,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716535577] [2023-11-29 04:50:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:09,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:50:09,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:09,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716535577] [2023-11-29 04:50:09,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716535577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:09,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070137117] [2023-11-29 04:50:09,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:50:09,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:09,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:09,979 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:09,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:50:10,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 04:50:10,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:50:10,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:50:10,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:50:10,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:50:10,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070137117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:50:10,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:50:10,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2023-11-29 04:50:10,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103992224] [2023-11-29 04:50:10,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:10,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:50:10,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:10,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:50:10,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:50:10,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:10,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 758 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:10,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:10,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:10,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:12,028 INFO L124 PetriNetUnfolderBase]: 11493/16004 cut-off events. [2023-11-29 04:50:12,028 INFO L125 PetriNetUnfolderBase]: For 45032/45032 co-relation queries the response was YES. [2023-11-29 04:50:12,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48320 conditions, 16004 events. 11493/16004 cut-off events. For 45032/45032 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 83764 event pairs, 2156 based on Foata normal form. 2/14380 useless extension candidates. Maximal degree in co-relation 48293. Up to 5424 conditions per place. [2023-11-29 04:50:12,110 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 161 selfloop transitions, 53 changer transitions 1/216 dead transitions. [2023-11-29 04:50:12,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 216 transitions, 1647 flow [2023-11-29 04:50:12,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:50:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 04:50:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2023-11-29 04:50:12,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2023-11-29 04:50:12,111 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 185 transitions. [2023-11-29 04:50:12,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 185 transitions. [2023-11-29 04:50:12,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:12,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 185 transitions. [2023-11-29 04:50:12,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 18.5) internal successors, (185), 10 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:12,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:12,113 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:12,113 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 758 flow. Second operand 10 states and 185 transitions. [2023-11-29 04:50:12,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 216 transitions, 1647 flow [2023-11-29 04:50:12,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 216 transitions, 1578 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-11-29 04:50:12,451 INFO L231 Difference]: Finished difference. Result has 106 places, 123 transitions, 1067 flow [2023-11-29 04:50:12,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1067, PETRI_PLACES=106, PETRI_TRANSITIONS=123} [2023-11-29 04:50:12,451 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 67 predicate places. [2023-11-29 04:50:12,451 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 123 transitions, 1067 flow [2023-11-29 04:50:12,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:12,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:12,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:12,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:50:12,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 04:50:12,653 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:12,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:12,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1355371980, now seen corresponding path program 4 times [2023-11-29 04:50:12,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:12,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660052154] [2023-11-29 04:50:12,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:12,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:12,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:12,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660052154] [2023-11-29 04:50:12,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660052154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:12,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625714274] [2023-11-29 04:50:12,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:50:12,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:12,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:12,921 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:12,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:50:13,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:50:13,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:50:13,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:50:13,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:13,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:50:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:13,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625714274] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:50:13,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:50:13,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2023-11-29 04:50:13,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574002883] [2023-11-29 04:50:13,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:50:13,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 04:50:13,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:13,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 04:50:13,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:50:13,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:13,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 123 transitions, 1067 flow. Second operand has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:13,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:13,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:13,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:19,412 INFO L124 PetriNetUnfolderBase]: 25861/36250 cut-off events. [2023-11-29 04:50:19,412 INFO L125 PetriNetUnfolderBase]: For 114121/114121 co-relation queries the response was YES. [2023-11-29 04:50:19,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109775 conditions, 36250 events. 25861/36250 cut-off events. For 114121/114121 co-relation queries the response was YES. Maximal size of possible extension queue 1349. Compared 216830 event pairs, 716 based on Foata normal form. 8/32432 useless extension candidates. Maximal degree in co-relation 109746. Up to 3936 conditions per place. [2023-11-29 04:50:19,641 INFO L140 encePairwiseOnDemand]: 25/42 looper letters, 614 selfloop transitions, 196 changer transitions 26/837 dead transitions. [2023-11-29 04:50:19,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 837 transitions, 6437 flow [2023-11-29 04:50:19,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 04:50:19,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 04:50:19,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 794 transitions. [2023-11-29 04:50:19,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109730848861284 [2023-11-29 04:50:19,643 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 794 transitions. [2023-11-29 04:50:19,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 794 transitions. [2023-11-29 04:50:19,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:19,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 794 transitions. [2023-11-29 04:50:19,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 17.26086956521739) internal successors, (794), 46 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:19,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 42.0) internal successors, (1974), 47 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:19,648 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 42.0) internal successors, (1974), 47 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:19,648 INFO L175 Difference]: Start difference. First operand has 106 places, 123 transitions, 1067 flow. Second operand 46 states and 794 transitions. [2023-11-29 04:50:19,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 837 transitions, 6437 flow [2023-11-29 04:50:20,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 837 transitions, 6124 flow, removed 144 selfloop flow, removed 4 redundant places. [2023-11-29 04:50:20,519 INFO L231 Difference]: Finished difference. Result has 170 places, 274 transitions, 2950 flow [2023-11-29 04:50:20,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2950, PETRI_PLACES=170, PETRI_TRANSITIONS=274} [2023-11-29 04:50:20,519 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 131 predicate places. [2023-11-29 04:50:20,520 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 274 transitions, 2950 flow [2023-11-29 04:50:20,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:20,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:20,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:20,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 04:50:20,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 04:50:20,720 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:20,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:20,721 INFO L85 PathProgramCache]: Analyzing trace with hash -788750346, now seen corresponding path program 1 times [2023-11-29 04:50:20,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:20,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434014170] [2023-11-29 04:50:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:20,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:50:20,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:20,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434014170] [2023-11-29 04:50:20,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434014170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:50:20,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:50:20,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:50:20,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734176244] [2023-11-29 04:50:20,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:20,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:50:20,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:20,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:50:20,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:50:20,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:20,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 274 transitions, 2950 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:20,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:20,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:20,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:23,129 INFO L124 PetriNetUnfolderBase]: 12527/18264 cut-off events. [2023-11-29 04:50:23,129 INFO L125 PetriNetUnfolderBase]: For 78899/78899 co-relation queries the response was YES. [2023-11-29 04:50:23,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61383 conditions, 18264 events. 12527/18264 cut-off events. For 78899/78899 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 107335 event pairs, 5340 based on Foata normal form. 840/18062 useless extension candidates. Maximal degree in co-relation 61331. Up to 10194 conditions per place. [2023-11-29 04:50:23,255 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 188 selfloop transitions, 16 changer transitions 2/207 dead transitions. [2023-11-29 04:50:23,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 207 transitions, 2239 flow [2023-11-29 04:50:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:50:23,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:50:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2023-11-29 04:50:23,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2023-11-29 04:50:23,256 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 101 transitions. [2023-11-29 04:50:23,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 101 transitions. [2023-11-29 04:50:23,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:23,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 101 transitions. [2023-11-29 04:50:23,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:23,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:23,257 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:23,257 INFO L175 Difference]: Start difference. First operand has 170 places, 274 transitions, 2950 flow. Second operand 5 states and 101 transitions. [2023-11-29 04:50:23,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 207 transitions, 2239 flow [2023-11-29 04:50:23,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 207 transitions, 2001 flow, removed 74 selfloop flow, removed 16 redundant places. [2023-11-29 04:50:23,783 INFO L231 Difference]: Finished difference. Result has 146 places, 173 transitions, 1507 flow [2023-11-29 04:50:23,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1507, PETRI_PLACES=146, PETRI_TRANSITIONS=173} [2023-11-29 04:50:23,784 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 107 predicate places. [2023-11-29 04:50:23,784 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 173 transitions, 1507 flow [2023-11-29 04:50:23,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:23,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:23,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:23,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 04:50:23,784 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:23,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:23,785 INFO L85 PathProgramCache]: Analyzing trace with hash 634028166, now seen corresponding path program 1 times [2023-11-29 04:50:23,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:23,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697454742] [2023-11-29 04:50:23,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:23,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:24,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:24,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697454742] [2023-11-29 04:50:24,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697454742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:24,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975879200] [2023-11-29 04:50:24,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:24,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:24,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:24,069 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:24,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:50:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:24,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:50:24,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:24,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:50:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:24,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975879200] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:24,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:50:24,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-11-29 04:50:24,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076969910] [2023-11-29 04:50:24,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:24,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:50:24,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:24,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:50:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:50:24,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:24,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 173 transitions, 1507 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:24,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:24,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:24,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:27,296 INFO L124 PetriNetUnfolderBase]: 14839/21736 cut-off events. [2023-11-29 04:50:27,297 INFO L125 PetriNetUnfolderBase]: For 44745/44745 co-relation queries the response was YES. [2023-11-29 04:50:27,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67951 conditions, 21736 events. 14839/21736 cut-off events. For 44745/44745 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 133487 event pairs, 6464 based on Foata normal form. 0/20694 useless extension candidates. Maximal degree in co-relation 67909. Up to 7049 conditions per place. [2023-11-29 04:50:27,435 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 254 selfloop transitions, 20 changer transitions 5/280 dead transitions. [2023-11-29 04:50:27,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 280 transitions, 2791 flow [2023-11-29 04:50:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:50:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 04:50:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2023-11-29 04:50:27,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2023-11-29 04:50:27,436 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 137 transitions. [2023-11-29 04:50:27,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 137 transitions. [2023-11-29 04:50:27,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:27,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 137 transitions. [2023-11-29 04:50:27,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:27,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:27,438 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:27,438 INFO L175 Difference]: Start difference. First operand has 146 places, 173 transitions, 1507 flow. Second operand 8 states and 137 transitions. [2023-11-29 04:50:27,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 280 transitions, 2791 flow [2023-11-29 04:50:27,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 280 transitions, 2765 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 04:50:27,682 INFO L231 Difference]: Finished difference. Result has 151 places, 176 transitions, 1545 flow [2023-11-29 04:50:27,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1545, PETRI_PLACES=151, PETRI_TRANSITIONS=176} [2023-11-29 04:50:27,682 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 112 predicate places. [2023-11-29 04:50:27,682 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 176 transitions, 1545 flow [2023-11-29 04:50:27,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:27,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:27,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:27,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 04:50:27,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 04:50:27,883 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:27,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:27,884 INFO L85 PathProgramCache]: Analyzing trace with hash 663653084, now seen corresponding path program 1 times [2023-11-29 04:50:27,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:27,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783527200] [2023-11-29 04:50:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:27,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:50:27,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:27,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783527200] [2023-11-29 04:50:27,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783527200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:50:27,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:50:27,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:50:27,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957081620] [2023-11-29 04:50:27,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:27,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:50:27,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:27,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:50:27,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:50:27,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:27,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 176 transitions, 1545 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:27,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:27,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:27,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:30,099 INFO L124 PetriNetUnfolderBase]: 11293/16882 cut-off events. [2023-11-29 04:50:30,099 INFO L125 PetriNetUnfolderBase]: For 40240/40240 co-relation queries the response was YES. [2023-11-29 04:50:30,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55534 conditions, 16882 events. 11293/16882 cut-off events. For 40240/40240 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 102396 event pairs, 6282 based on Foata normal form. 652/17532 useless extension candidates. Maximal degree in co-relation 55491. Up to 10477 conditions per place. [2023-11-29 04:50:30,202 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 72 selfloop transitions, 4 changer transitions 102/179 dead transitions. [2023-11-29 04:50:30,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 179 transitions, 1732 flow [2023-11-29 04:50:30,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:50:30,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:50:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2023-11-29 04:50:30,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2023-11-29 04:50:30,203 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 94 transitions. [2023-11-29 04:50:30,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 94 transitions. [2023-11-29 04:50:30,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:30,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 94 transitions. [2023-11-29 04:50:30,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:30,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:30,203 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:30,204 INFO L175 Difference]: Start difference. First operand has 151 places, 176 transitions, 1545 flow. Second operand 5 states and 94 transitions. [2023-11-29 04:50:30,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 179 transitions, 1732 flow [2023-11-29 04:50:30,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 179 transitions, 1628 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-11-29 04:50:30,370 INFO L231 Difference]: Finished difference. Result has 142 places, 77 transitions, 538 flow [2023-11-29 04:50:30,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=538, PETRI_PLACES=142, PETRI_TRANSITIONS=77} [2023-11-29 04:50:30,370 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 103 predicate places. [2023-11-29 04:50:30,370 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 77 transitions, 538 flow [2023-11-29 04:50:30,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:30,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:30,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:30,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 04:50:30,371 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:30,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:30,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1685971638, now seen corresponding path program 1 times [2023-11-29 04:50:30,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:30,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523857779] [2023-11-29 04:50:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:30,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:50:30,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:30,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523857779] [2023-11-29 04:50:30,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523857779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:30,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476637590] [2023-11-29 04:50:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:30,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:30,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:30,499 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:30,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:50:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:30,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:50:30,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:30,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:50:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:30,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476637590] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:30,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:50:30,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2023-11-29 04:50:30,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93245949] [2023-11-29 04:50:30,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:30,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:50:30,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:30,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:50:30,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:50:30,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:30,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 77 transitions, 538 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:30,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:30,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:30,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:31,760 INFO L124 PetriNetUnfolderBase]: 5615/7956 cut-off events. [2023-11-29 04:50:31,760 INFO L125 PetriNetUnfolderBase]: For 22134/22134 co-relation queries the response was YES. [2023-11-29 04:50:31,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28303 conditions, 7956 events. 5615/7956 cut-off events. For 22134/22134 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 37606 event pairs, 1698 based on Foata normal form. 232/8186 useless extension candidates. Maximal degree in co-relation 28265. Up to 4160 conditions per place. [2023-11-29 04:50:31,813 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 72 selfloop transitions, 16 changer transitions 0/89 dead transitions. [2023-11-29 04:50:31,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 89 transitions, 759 flow [2023-11-29 04:50:31,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:50:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:50:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2023-11-29 04:50:31,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29591836734693877 [2023-11-29 04:50:31,814 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 87 transitions. [2023-11-29 04:50:31,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 87 transitions. [2023-11-29 04:50:31,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:31,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 87 transitions. [2023-11-29 04:50:31,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:31,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:31,815 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:31,815 INFO L175 Difference]: Start difference. First operand has 142 places, 77 transitions, 538 flow. Second operand 7 states and 87 transitions. [2023-11-29 04:50:31,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 89 transitions, 759 flow [2023-11-29 04:50:31,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 89 transitions, 657 flow, removed 47 selfloop flow, removed 24 redundant places. [2023-11-29 04:50:31,904 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 412 flow [2023-11-29 04:50:31,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=412, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-11-29 04:50:31,904 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 36 predicate places. [2023-11-29 04:50:31,904 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 412 flow [2023-11-29 04:50:31,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:31,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:31,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:31,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 04:50:32,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:32,105 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:32,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:32,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1045918624, now seen corresponding path program 1 times [2023-11-29 04:50:32,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:32,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507531195] [2023-11-29 04:50:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:32,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:50:33,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:33,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507531195] [2023-11-29 04:50:33,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507531195] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:33,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348303965] [2023-11-29 04:50:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:33,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:33,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:33,125 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:33,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:50:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:33,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 04:50:33,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:33,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:50:33,739 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 04:50:33,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2023-11-29 04:50:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:33,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:50:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:50:34,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348303965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:50:34,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:50:34,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 10] total 27 [2023-11-29 04:50:34,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573462007] [2023-11-29 04:50:34,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:50:34,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 04:50:34,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:34,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 04:50:34,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-11-29 04:50:34,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:34,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 412 flow. Second operand has 27 states, 27 states have (on average 7.037037037037037) internal successors, (190), 27 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:34,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:34,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:34,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:37,539 INFO L124 PetriNetUnfolderBase]: 8731/12406 cut-off events. [2023-11-29 04:50:37,539 INFO L125 PetriNetUnfolderBase]: For 18647/18647 co-relation queries the response was YES. [2023-11-29 04:50:37,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39947 conditions, 12406 events. 8731/12406 cut-off events. For 18647/18647 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 65469 event pairs, 992 based on Foata normal form. 2/12406 useless extension candidates. Maximal degree in co-relation 39931. Up to 5860 conditions per place. [2023-11-29 04:50:37,617 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 200 selfloop transitions, 42 changer transitions 13/256 dead transitions. [2023-11-29 04:50:37,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 256 transitions, 1841 flow [2023-11-29 04:50:37,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:50:37,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 04:50:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 272 transitions. [2023-11-29 04:50:37,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2023-11-29 04:50:37,619 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 272 transitions. [2023-11-29 04:50:37,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 272 transitions. [2023-11-29 04:50:37,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:37,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 272 transitions. [2023-11-29 04:50:37,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 15.11111111111111) internal successors, (272), 18 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:37,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 42.0) internal successors, (798), 19 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:37,622 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 42.0) internal successors, (798), 19 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:37,622 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 412 flow. Second operand 18 states and 272 transitions. [2023-11-29 04:50:37,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 256 transitions, 1841 flow [2023-11-29 04:50:37,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 256 transitions, 1794 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 04:50:37,634 INFO L231 Difference]: Finished difference. Result has 96 places, 84 transitions, 696 flow [2023-11-29 04:50:37,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=696, PETRI_PLACES=96, PETRI_TRANSITIONS=84} [2023-11-29 04:50:37,634 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 57 predicate places. [2023-11-29 04:50:37,634 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 84 transitions, 696 flow [2023-11-29 04:50:37,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.037037037037037) internal successors, (190), 27 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:37,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:37,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:37,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 04:50:37,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:37,836 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:37,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:37,836 INFO L85 PathProgramCache]: Analyzing trace with hash 491602698, now seen corresponding path program 2 times [2023-11-29 04:50:37,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:37,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954943215] [2023-11-29 04:50:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:37,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:39,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:39,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954943215] [2023-11-29 04:50:39,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954943215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:39,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597612587] [2023-11-29 04:50:39,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:50:39,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:39,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:39,127 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:39,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:50:39,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:50:39,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:50:39,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 04:50:39,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:39,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:50:39,607 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 04:50:39,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-11-29 04:50:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:39,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:50:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:50:40,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597612587] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:50:40,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:50:40,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 25 [2023-11-29 04:50:40,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782699309] [2023-11-29 04:50:40,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:50:40,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 04:50:40,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:40,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 04:50:40,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2023-11-29 04:50:40,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:40,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 84 transitions, 696 flow. Second operand has 25 states, 25 states have (on average 6.88) internal successors, (172), 25 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:40,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:40,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:40,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:43,173 INFO L124 PetriNetUnfolderBase]: 9703/13850 cut-off events. [2023-11-29 04:50:43,173 INFO L125 PetriNetUnfolderBase]: For 36301/36301 co-relation queries the response was YES. [2023-11-29 04:50:43,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50603 conditions, 13850 events. 9703/13850 cut-off events. For 36301/36301 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 74680 event pairs, 1248 based on Foata normal form. 4/13854 useless extension candidates. Maximal degree in co-relation 50579. Up to 5980 conditions per place. [2023-11-29 04:50:43,258 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 187 selfloop transitions, 46 changer transitions 28/262 dead transitions. [2023-11-29 04:50:43,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 262 transitions, 2059 flow [2023-11-29 04:50:43,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 04:50:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 04:50:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 288 transitions. [2023-11-29 04:50:43,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3609022556390977 [2023-11-29 04:50:43,260 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 288 transitions. [2023-11-29 04:50:43,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 288 transitions. [2023-11-29 04:50:43,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:43,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 288 transitions. [2023-11-29 04:50:43,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 15.157894736842104) internal successors, (288), 19 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:43,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 42.0) internal successors, (840), 20 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:43,262 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 42.0) internal successors, (840), 20 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:43,262 INFO L175 Difference]: Start difference. First operand has 96 places, 84 transitions, 696 flow. Second operand 19 states and 288 transitions. [2023-11-29 04:50:43,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 262 transitions, 2059 flow [2023-11-29 04:50:43,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 262 transitions, 1965 flow, removed 20 selfloop flow, removed 8 redundant places. [2023-11-29 04:50:43,327 INFO L231 Difference]: Finished difference. Result has 111 places, 91 transitions, 819 flow [2023-11-29 04:50:43,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=819, PETRI_PLACES=111, PETRI_TRANSITIONS=91} [2023-11-29 04:50:43,328 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 72 predicate places. [2023-11-29 04:50:43,328 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 91 transitions, 819 flow [2023-11-29 04:50:43,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.88) internal successors, (172), 25 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:43,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:43,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:43,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 04:50:43,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:43,528 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:43,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:43,529 INFO L85 PathProgramCache]: Analyzing trace with hash 457595142, now seen corresponding path program 3 times [2023-11-29 04:50:43,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:43,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031693148] [2023-11-29 04:50:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:43,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:44,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:44,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031693148] [2023-11-29 04:50:44,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031693148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:44,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642205085] [2023-11-29 04:50:44,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:50:44,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:44,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:44,681 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:44,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 04:50:44,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:50:44,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:50:44,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 04:50:44,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:44,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:50:45,129 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 04:50:45,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2023-11-29 04:50:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:45,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:50:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:50:45,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642205085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:50:45,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:50:45,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 10] total 26 [2023-11-29 04:50:45,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200745924] [2023-11-29 04:50:45,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:50:45,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:50:45,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:45,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:50:45,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:50:45,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:45,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 91 transitions, 819 flow. Second operand has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 26 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:45,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:45,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:45,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:49,175 INFO L124 PetriNetUnfolderBase]: 9631/13728 cut-off events. [2023-11-29 04:50:49,175 INFO L125 PetriNetUnfolderBase]: For 47294/47294 co-relation queries the response was YES. [2023-11-29 04:50:49,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53150 conditions, 13728 events. 9631/13728 cut-off events. For 47294/47294 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 73761 event pairs, 1224 based on Foata normal form. 4/13732 useless extension candidates. Maximal degree in co-relation 53122. Up to 5980 conditions per place. [2023-11-29 04:50:49,253 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 207 selfloop transitions, 54 changer transitions 26/288 dead transitions. [2023-11-29 04:50:49,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 288 transitions, 2329 flow [2023-11-29 04:50:49,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 04:50:49,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 04:50:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 319 transitions. [2023-11-29 04:50:49,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36167800453514737 [2023-11-29 04:50:49,255 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 319 transitions. [2023-11-29 04:50:49,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 319 transitions. [2023-11-29 04:50:49,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:49,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 319 transitions. [2023-11-29 04:50:49,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 15.19047619047619) internal successors, (319), 21 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:49,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 42.0) internal successors, (924), 22 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:49,258 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 42.0) internal successors, (924), 22 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:49,258 INFO L175 Difference]: Start difference. First operand has 111 places, 91 transitions, 819 flow. Second operand 21 states and 319 transitions. [2023-11-29 04:50:49,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 288 transitions, 2329 flow [2023-11-29 04:50:49,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 288 transitions, 2222 flow, removed 17 selfloop flow, removed 14 redundant places. [2023-11-29 04:50:49,342 INFO L231 Difference]: Finished difference. Result has 119 places, 100 transitions, 962 flow [2023-11-29 04:50:49,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=962, PETRI_PLACES=119, PETRI_TRANSITIONS=100} [2023-11-29 04:50:49,343 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 80 predicate places. [2023-11-29 04:50:49,343 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 100 transitions, 962 flow [2023-11-29 04:50:49,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 26 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:49,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:49,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:49,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 04:50:49,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:49,544 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:49,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash 269996998, now seen corresponding path program 4 times [2023-11-29 04:50:49,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:49,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072072827] [2023-11-29 04:50:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:49,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:50:50,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:50,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072072827] [2023-11-29 04:50:50,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072072827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:50,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934591048] [2023-11-29 04:50:50,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:50:50,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:50,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:50,233 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:50,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 04:50:50,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:50:50,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:50:50,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 04:50:50,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:50,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:50:50,573 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 04:50:50,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-11-29 04:50:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:50,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:50:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:50:51,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934591048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:50:51,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:50:51,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 10] total 25 [2023-11-29 04:50:51,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530378997] [2023-11-29 04:50:51,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:50:51,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 04:50:51,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:51,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 04:50:51,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-11-29 04:50:51,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:51,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 100 transitions, 962 flow. Second operand has 25 states, 25 states have (on average 6.96) internal successors, (174), 25 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:51,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:51,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:51,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:54,046 INFO L124 PetriNetUnfolderBase]: 11971/17084 cut-off events. [2023-11-29 04:50:54,046 INFO L125 PetriNetUnfolderBase]: For 59718/59718 co-relation queries the response was YES. [2023-11-29 04:50:54,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67410 conditions, 17084 events. 11971/17084 cut-off events. For 59718/59718 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 96162 event pairs, 1400 based on Foata normal form. 2/17086 useless extension candidates. Maximal degree in co-relation 67380. Up to 8836 conditions per place. [2023-11-29 04:50:54,173 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 203 selfloop transitions, 48 changer transitions 14/266 dead transitions. [2023-11-29 04:50:54,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 266 transitions, 2408 flow [2023-11-29 04:50:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:50:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 04:50:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 261 transitions. [2023-11-29 04:50:54,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2023-11-29 04:50:54,174 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 261 transitions. [2023-11-29 04:50:54,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 261 transitions. [2023-11-29 04:50:54,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:54,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 261 transitions. [2023-11-29 04:50:54,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 14.5) internal successors, (261), 18 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:54,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 42.0) internal successors, (798), 19 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:54,177 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 42.0) internal successors, (798), 19 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:54,177 INFO L175 Difference]: Start difference. First operand has 119 places, 100 transitions, 962 flow. Second operand 18 states and 261 transitions. [2023-11-29 04:50:54,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 266 transitions, 2408 flow [2023-11-29 04:50:54,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 266 transitions, 2276 flow, removed 17 selfloop flow, removed 15 redundant places. [2023-11-29 04:50:54,369 INFO L231 Difference]: Finished difference. Result has 125 places, 107 transitions, 1090 flow [2023-11-29 04:50:54,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1090, PETRI_PLACES=125, PETRI_TRANSITIONS=107} [2023-11-29 04:50:54,369 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 86 predicate places. [2023-11-29 04:50:54,369 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 107 transitions, 1090 flow [2023-11-29 04:50:54,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.96) internal successors, (174), 25 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:54,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:50:54,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:54,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 04:50:54,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 04:50:54,570 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:50:54,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:54,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1452439290, now seen corresponding path program 5 times [2023-11-29 04:50:54,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:54,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534887617] [2023-11-29 04:50:54,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:54,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:55,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:55,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534887617] [2023-11-29 04:50:55,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534887617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:50:55,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634124930] [2023-11-29 04:50:55,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:50:55,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:55,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:55,518 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:55,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 04:50:55,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:50:55,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:50:55,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 04:50:55,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:55,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:50:55,927 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 04:50:55,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2023-11-29 04:50:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:50:55,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:50:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:50:56,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634124930] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:50:56,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:50:56,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 10] total 26 [2023-11-29 04:50:56,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807488594] [2023-11-29 04:50:56,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:50:56,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:50:56,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:56,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:50:56,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:50:56,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:50:56,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 107 transitions, 1090 flow. Second operand has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 26 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:56,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:50:56,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:50:56,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:50:59,704 INFO L124 PetriNetUnfolderBase]: 11931/17044 cut-off events. [2023-11-29 04:50:59,704 INFO L125 PetriNetUnfolderBase]: For 73174/73174 co-relation queries the response was YES. [2023-11-29 04:50:59,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69784 conditions, 17044 events. 11931/17044 cut-off events. For 73174/73174 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 96129 event pairs, 1316 based on Foata normal form. 2/17046 useless extension candidates. Maximal degree in co-relation 69750. Up to 8836 conditions per place. [2023-11-29 04:50:59,845 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 202 selfloop transitions, 55 changer transitions 13/271 dead transitions. [2023-11-29 04:50:59,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 271 transitions, 2512 flow [2023-11-29 04:50:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:50:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 04:50:59,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 268 transitions. [2023-11-29 04:50:59,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2023-11-29 04:50:59,847 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 268 transitions. [2023-11-29 04:50:59,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 268 transitions. [2023-11-29 04:50:59,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:50:59,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 268 transitions. [2023-11-29 04:50:59,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 14.88888888888889) internal successors, (268), 18 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:59,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 42.0) internal successors, (798), 19 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:59,848 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 42.0) internal successors, (798), 19 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:59,848 INFO L175 Difference]: Start difference. First operand has 125 places, 107 transitions, 1090 flow. Second operand 18 states and 268 transitions. [2023-11-29 04:50:59,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 271 transitions, 2512 flow [2023-11-29 04:51:00,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 271 transitions, 2421 flow, removed 14 selfloop flow, removed 12 redundant places. [2023-11-29 04:51:00,049 INFO L231 Difference]: Finished difference. Result has 134 places, 116 transitions, 1298 flow [2023-11-29 04:51:00,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1298, PETRI_PLACES=134, PETRI_TRANSITIONS=116} [2023-11-29 04:51:00,049 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 95 predicate places. [2023-11-29 04:51:00,049 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 116 transitions, 1298 flow [2023-11-29 04:51:00,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 26 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:00,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:51:00,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:51:00,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 04:51:00,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:00,250 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:51:00,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:00,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1445975000, now seen corresponding path program 6 times [2023-11-29 04:51:00,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:00,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605366724] [2023-11-29 04:51:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:00,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:51:00,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:00,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605366724] [2023-11-29 04:51:00,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605366724] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:00,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818258121] [2023-11-29 04:51:00,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:51:00,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:00,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:00,984 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:51:00,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 04:51:01,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 04:51:01,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:51:01,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 04:51:01,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:51:01,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:51:01,476 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 04:51:01,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2023-11-29 04:51:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:51:01,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:51:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:51:02,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818258121] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:51:02,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:51:02,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 10] total 28 [2023-11-29 04:51:02,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892684921] [2023-11-29 04:51:02,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:51:02,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 04:51:02,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:02,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 04:51:02,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2023-11-29 04:51:02,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:51:02,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 116 transitions, 1298 flow. Second operand has 28 states, 28 states have (on average 6.821428571428571) internal successors, (191), 28 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:02,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:51:02,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:51:02,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:51:07,717 INFO L124 PetriNetUnfolderBase]: 20139/28766 cut-off events. [2023-11-29 04:51:07,718 INFO L125 PetriNetUnfolderBase]: For 129318/129318 co-relation queries the response was YES. [2023-11-29 04:51:07,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117316 conditions, 28766 events. 20139/28766 cut-off events. For 129318/129318 co-relation queries the response was YES. Maximal size of possible extension queue 1123. Compared 174421 event pairs, 1392 based on Foata normal form. 48/28814 useless extension candidates. Maximal degree in co-relation 117278. Up to 9056 conditions per place. [2023-11-29 04:51:07,962 INFO L140 encePairwiseOnDemand]: 23/42 looper letters, 346 selfloop transitions, 86 changer transitions 31/464 dead transitions. [2023-11-29 04:51:07,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 464 transitions, 4179 flow [2023-11-29 04:51:07,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 04:51:07,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 04:51:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 477 transitions. [2023-11-29 04:51:07,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40561224489795916 [2023-11-29 04:51:07,964 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 477 transitions. [2023-11-29 04:51:07,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 477 transitions. [2023-11-29 04:51:07,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:51:07,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 477 transitions. [2023-11-29 04:51:07,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 17.035714285714285) internal successors, (477), 28 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:07,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 42.0) internal successors, (1218), 29 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:07,967 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 42.0) internal successors, (1218), 29 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:07,967 INFO L175 Difference]: Start difference. First operand has 134 places, 116 transitions, 1298 flow. Second operand 28 states and 477 transitions. [2023-11-29 04:51:07,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 464 transitions, 4179 flow [2023-11-29 04:51:08,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 464 transitions, 3994 flow, removed 54 selfloop flow, removed 13 redundant places. [2023-11-29 04:51:08,486 INFO L231 Difference]: Finished difference. Result has 160 places, 148 transitions, 1880 flow [2023-11-29 04:51:08,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1880, PETRI_PLACES=160, PETRI_TRANSITIONS=148} [2023-11-29 04:51:08,487 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 121 predicate places. [2023-11-29 04:51:08,487 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 148 transitions, 1880 flow [2023-11-29 04:51:08,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.821428571428571) internal successors, (191), 28 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:08,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:51:08,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:51:08,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 04:51:08,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:08,688 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:51:08,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1862014764, now seen corresponding path program 7 times [2023-11-29 04:51:08,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:08,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873250808] [2023-11-29 04:51:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:51:09,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:09,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873250808] [2023-11-29 04:51:09,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873250808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:09,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545552953] [2023-11-29 04:51:09,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:51:09,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:09,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:09,606 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:51:09,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 04:51:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:09,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 04:51:09,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:51:09,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:51:10,100 INFO L349 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-11-29 04:51:10,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 41 [2023-11-29 04:51:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:51:10,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:51:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:51:10,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545552953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:51:10,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:51:10,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 10] total 30 [2023-11-29 04:51:10,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254013107] [2023-11-29 04:51:10,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:51:10,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 04:51:10,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:10,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 04:51:10,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2023-11-29 04:51:10,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:51:10,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 148 transitions, 1880 flow. Second operand has 30 states, 30 states have (on average 6.8) internal successors, (204), 30 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:10,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:51:10,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:51:10,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:51:20,671 INFO L124 PetriNetUnfolderBase]: 38023/54638 cut-off events. [2023-11-29 04:51:20,671 INFO L125 PetriNetUnfolderBase]: For 340185/340185 co-relation queries the response was YES. [2023-11-29 04:51:21,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239170 conditions, 54638 events. 38023/54638 cut-off events. For 340185/340185 co-relation queries the response was YES. Maximal size of possible extension queue 2000. Compared 365933 event pairs, 7396 based on Foata normal form. 4/54642 useless extension candidates. Maximal degree in co-relation 239120. Up to 27384 conditions per place. [2023-11-29 04:51:21,237 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 377 selfloop transitions, 110 changer transitions 29/517 dead transitions. [2023-11-29 04:51:21,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 517 transitions, 6166 flow [2023-11-29 04:51:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 04:51:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 04:51:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 379 transitions. [2023-11-29 04:51:21,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36095238095238097 [2023-11-29 04:51:21,238 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 379 transitions. [2023-11-29 04:51:21,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 379 transitions. [2023-11-29 04:51:21,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:51:21,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 379 transitions. [2023-11-29 04:51:21,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 15.16) internal successors, (379), 25 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:21,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 42.0) internal successors, (1092), 26 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:21,241 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 42.0) internal successors, (1092), 26 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:21,241 INFO L175 Difference]: Start difference. First operand has 160 places, 148 transitions, 1880 flow. Second operand 25 states and 379 transitions. [2023-11-29 04:51:21,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 517 transitions, 6166 flow [2023-11-29 04:51:23,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 517 transitions, 5752 flow, removed 106 selfloop flow, removed 16 redundant places. [2023-11-29 04:51:23,918 INFO L231 Difference]: Finished difference. Result has 178 places, 225 transitions, 3213 flow [2023-11-29 04:51:23,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3213, PETRI_PLACES=178, PETRI_TRANSITIONS=225} [2023-11-29 04:51:23,918 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 139 predicate places. [2023-11-29 04:51:23,918 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 225 transitions, 3213 flow [2023-11-29 04:51:23,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.8) internal successors, (204), 30 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:23,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:51:23,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:51:23,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 04:51:24,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:24,119 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:51:24,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:24,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1913573400, now seen corresponding path program 8 times [2023-11-29 04:51:24,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:24,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057366815] [2023-11-29 04:51:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:24,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:25,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:25,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057366815] [2023-11-29 04:51:25,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057366815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:25,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973606244] [2023-11-29 04:51:25,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:51:25,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:25,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:25,523 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:51:25,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 04:51:25,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:51:25,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:51:25,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 04:51:25,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:51:26,135 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 04:51:26,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 04:51:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:51:26,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:51:27,051 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2023-11-29 04:51:27,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2023-11-29 04:51:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:51:28,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973606244] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:51:28,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:51:28,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 10] total 33 [2023-11-29 04:51:28,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905432205] [2023-11-29 04:51:28,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:51:28,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 04:51:28,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:28,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 04:51:28,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 04:51:28,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:51:28,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 225 transitions, 3213 flow. Second operand has 33 states, 33 states have (on average 6.545454545454546) internal successors, (216), 33 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:28,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:51:28,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:51:28,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:51:40,651 INFO L124 PetriNetUnfolderBase]: 39327/56584 cut-off events. [2023-11-29 04:51:40,652 INFO L125 PetriNetUnfolderBase]: For 411303/411303 co-relation queries the response was YES. [2023-11-29 04:51:41,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265032 conditions, 56584 events. 39327/56584 cut-off events. For 411303/411303 co-relation queries the response was YES. Maximal size of possible extension queue 2079. Compared 379658 event pairs, 8778 based on Foata normal form. 4/56588 useless extension candidates. Maximal degree in co-relation 264972. Up to 27488 conditions per place. [2023-11-29 04:51:41,315 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 368 selfloop transitions, 134 changer transitions 27/530 dead transitions. [2023-11-29 04:51:41,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 530 transitions, 6465 flow [2023-11-29 04:51:41,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 04:51:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 04:51:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 396 transitions. [2023-11-29 04:51:41,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3626373626373626 [2023-11-29 04:51:41,317 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 396 transitions. [2023-11-29 04:51:41,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 396 transitions. [2023-11-29 04:51:41,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:51:41,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 396 transitions. [2023-11-29 04:51:41,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 15.23076923076923) internal successors, (396), 26 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:41,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 42.0) internal successors, (1134), 27 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:41,320 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 42.0) internal successors, (1134), 27 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:41,320 INFO L175 Difference]: Start difference. First operand has 178 places, 225 transitions, 3213 flow. Second operand 26 states and 396 transitions. [2023-11-29 04:51:41,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 530 transitions, 6465 flow [2023-11-29 04:51:45,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 530 transitions, 6295 flow, removed 55 selfloop flow, removed 10 redundant places. [2023-11-29 04:51:45,886 INFO L231 Difference]: Finished difference. Result has 200 places, 272 transitions, 4128 flow [2023-11-29 04:51:45,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3131, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4128, PETRI_PLACES=200, PETRI_TRANSITIONS=272} [2023-11-29 04:51:45,886 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 161 predicate places. [2023-11-29 04:51:45,886 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 272 transitions, 4128 flow [2023-11-29 04:51:45,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.545454545454546) internal successors, (216), 33 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:45,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:51:45,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:51:45,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 04:51:46,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 04:51:46,087 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:51:46,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:46,087 INFO L85 PathProgramCache]: Analyzing trace with hash -996371958, now seen corresponding path program 9 times [2023-11-29 04:51:46,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:46,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345425116] [2023-11-29 04:51:46,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:46,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:51:47,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:47,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345425116] [2023-11-29 04:51:47,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345425116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:47,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333307745] [2023-11-29 04:51:47,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:51:47,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:47,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:47,185 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:51:47,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 04:51:47,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:51:47,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:51:47,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 04:51:47,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:51:47,614 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 04:51:47,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-11-29 04:51:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:51:47,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:51:48,403 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2023-11-29 04:51:48,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2023-11-29 04:51:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:51:49,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333307745] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:51:49,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:51:49,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 27 [2023-11-29 04:51:49,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725004615] [2023-11-29 04:51:49,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:51:49,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 04:51:49,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:49,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 04:51:49,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2023-11-29 04:51:49,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:51:49,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 272 transitions, 4128 flow. Second operand has 27 states, 27 states have (on average 6.851851851851852) internal successors, (185), 27 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:49,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:51:49,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:51:49,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:52:02,322 INFO L124 PetriNetUnfolderBase]: 42203/61074 cut-off events. [2023-11-29 04:52:02,322 INFO L125 PetriNetUnfolderBase]: For 507223/507223 co-relation queries the response was YES. [2023-11-29 04:52:02,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297576 conditions, 61074 events. 42203/61074 cut-off events. For 507223/507223 co-relation queries the response was YES. Maximal size of possible extension queue 2287. Compared 420867 event pairs, 8258 based on Foata normal form. 4/61078 useless extension candidates. Maximal degree in co-relation 297508. Up to 27664 conditions per place. [2023-11-29 04:52:03,107 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 427 selfloop transitions, 136 changer transitions 25/589 dead transitions. [2023-11-29 04:52:03,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 589 transitions, 7639 flow [2023-11-29 04:52:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 04:52:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 04:52:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 403 transitions. [2023-11-29 04:52:03,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3838095238095238 [2023-11-29 04:52:03,108 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 403 transitions. [2023-11-29 04:52:03,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 403 transitions. [2023-11-29 04:52:03,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:52:03,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 403 transitions. [2023-11-29 04:52:03,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 16.12) internal successors, (403), 25 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:52:03,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 42.0) internal successors, (1092), 26 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:52:03,111 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 42.0) internal successors, (1092), 26 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:52:03,111 INFO L175 Difference]: Start difference. First operand has 200 places, 272 transitions, 4128 flow. Second operand 25 states and 403 transitions. [2023-11-29 04:52:03,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 589 transitions, 7639 flow [2023-11-29 04:52:08,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 589 transitions, 7406 flow, removed 47 selfloop flow, removed 15 redundant places. [2023-11-29 04:52:08,999 INFO L231 Difference]: Finished difference. Result has 215 places, 285 transitions, 4457 flow [2023-11-29 04:52:08,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4457, PETRI_PLACES=215, PETRI_TRANSITIONS=285} [2023-11-29 04:52:09,000 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 176 predicate places. [2023-11-29 04:52:09,000 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 285 transitions, 4457 flow [2023-11-29 04:52:09,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.851851851851852) internal successors, (185), 27 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:52:09,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:52:09,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:52:09,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 04:52:09,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 04:52:09,201 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:52:09,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:52:09,201 INFO L85 PathProgramCache]: Analyzing trace with hash -669145798, now seen corresponding path program 10 times [2023-11-29 04:52:09,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:52:09,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967131227] [2023-11-29 04:52:09,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:52:09,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:52:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:52:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:52:10,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:52:10,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967131227] [2023-11-29 04:52:10,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967131227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:52:10,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815763910] [2023-11-29 04:52:10,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:52:10,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:52:10,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:52:10,287 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:52:10,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 04:52:10,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:52:10,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:52:10,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 04:52:10,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:52:10,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:52:10,863 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 04:52:10,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 30 [2023-11-29 04:52:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:52:10,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:52:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:52:11,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815763910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:52:11,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:52:11,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 33 [2023-11-29 04:52:11,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870268150] [2023-11-29 04:52:11,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:52:11,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 04:52:11,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:52:11,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 04:52:11,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 04:52:11,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:52:11,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 285 transitions, 4457 flow. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 33 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:52:11,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:52:11,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:52:11,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:52:38,560 INFO L124 PetriNetUnfolderBase]: 82737/120000 cut-off events. [2023-11-29 04:52:38,561 INFO L125 PetriNetUnfolderBase]: For 932336/932336 co-relation queries the response was YES. [2023-11-29 04:52:40,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561771 conditions, 120000 events. 82737/120000 cut-off events. For 932336/932336 co-relation queries the response was YES. Maximal size of possible extension queue 4272. Compared 899375 event pairs, 13586 based on Foata normal form. 104/120104 useless extension candidates. Maximal degree in co-relation 561697. Up to 29712 conditions per place. [2023-11-29 04:52:40,585 INFO L140 encePairwiseOnDemand]: 23/42 looper letters, 679 selfloop transitions, 266 changer transitions 93/1039 dead transitions. [2023-11-29 04:52:40,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 1039 transitions, 12356 flow [2023-11-29 04:52:40,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 04:52:40,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 04:52:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 806 transitions. [2023-11-29 04:52:40,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41718426501035194 [2023-11-29 04:52:40,587 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 806 transitions. [2023-11-29 04:52:40,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 806 transitions. [2023-11-29 04:52:40,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:52:40,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 806 transitions. [2023-11-29 04:52:40,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 17.52173913043478) internal successors, (806), 46 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:52:40,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 42.0) internal successors, (1974), 47 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:52:40,591 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 42.0) internal successors, (1974), 47 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:52:40,591 INFO L175 Difference]: Start difference. First operand has 215 places, 285 transitions, 4457 flow. Second operand 46 states and 806 transitions. [2023-11-29 04:52:40,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 1039 transitions, 12356 flow [2023-11-29 04:52:58,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 1039 transitions, 11984 flow, removed 34 selfloop flow, removed 17 redundant places. [2023-11-29 04:52:58,089 INFO L231 Difference]: Finished difference. Result has 270 places, 440 transitions, 7177 flow [2023-11-29 04:52:58,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4204, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=7177, PETRI_PLACES=270, PETRI_TRANSITIONS=440} [2023-11-29 04:52:58,090 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 231 predicate places. [2023-11-29 04:52:58,090 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 440 transitions, 7177 flow [2023-11-29 04:52:58,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 33 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:52:58,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:52:58,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:52:58,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-29 04:52:58,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:52:58,291 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:52:58,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:52:58,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1261174820, now seen corresponding path program 11 times [2023-11-29 04:52:58,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:52:58,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296786377] [2023-11-29 04:52:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:52:58,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:52:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:52:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:52:59,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:52:59,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296786377] [2023-11-29 04:52:59,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296786377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:52:59,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082125743] [2023-11-29 04:52:59,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:52:59,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:52:59,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:52:59,071 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:52:59,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 04:52:59,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:52:59,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:52:59,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 04:52:59,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:52:59,446 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 04:52:59,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-11-29 04:52:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:52:59,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:53:00,310 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2023-11-29 04:53:00,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2023-11-29 04:53:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:53:00,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082125743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:53:00,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:53:00,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 26 [2023-11-29 04:53:00,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678802599] [2023-11-29 04:53:00,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:53:00,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:53:00,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:53:00,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:53:00,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:53:00,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:53:00,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 440 transitions, 7177 flow. Second operand has 26 states, 26 states have (on average 6.923076923076923) internal successors, (180), 26 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:53:00,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:53:00,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:53:00,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:53:35,284 INFO L124 PetriNetUnfolderBase]: 95649/139008 cut-off events. [2023-11-29 04:53:35,285 INFO L125 PetriNetUnfolderBase]: For 2432233/2432233 co-relation queries the response was YES. [2023-11-29 04:53:37,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809960 conditions, 139008 events. 95649/139008 cut-off events. For 2432233/2432233 co-relation queries the response was YES. Maximal size of possible extension queue 5011. Compared 1061065 event pairs, 28690 based on Foata normal form. 20/139028 useless extension candidates. Maximal degree in co-relation 809859. Up to 48510 conditions per place. [2023-11-29 04:53:38,482 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 520 selfloop transitions, 181 changer transitions 40/742 dead transitions. [2023-11-29 04:53:38,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 742 transitions, 12072 flow [2023-11-29 04:53:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 04:53:38,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 04:53:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 352 transitions. [2023-11-29 04:53:38,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39909297052154197 [2023-11-29 04:53:38,484 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 352 transitions. [2023-11-29 04:53:38,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 352 transitions. [2023-11-29 04:53:38,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:53:38,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 352 transitions. [2023-11-29 04:53:38,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 16.761904761904763) internal successors, (352), 21 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:53:38,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 42.0) internal successors, (924), 22 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:53:38,486 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 42.0) internal successors, (924), 22 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:53:38,486 INFO L175 Difference]: Start difference. First operand has 270 places, 440 transitions, 7177 flow. Second operand 21 states and 352 transitions. [2023-11-29 04:53:38,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 742 transitions, 12072 flow [2023-11-29 04:55:00,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 742 transitions, 11223 flow, removed 361 selfloop flow, removed 21 redundant places. [2023-11-29 04:55:00,160 INFO L231 Difference]: Finished difference. Result has 271 places, 480 transitions, 7987 flow [2023-11-29 04:55:00,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6542, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7987, PETRI_PLACES=271, PETRI_TRANSITIONS=480} [2023-11-29 04:55:00,161 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 232 predicate places. [2023-11-29 04:55:00,161 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 480 transitions, 7987 flow [2023-11-29 04:55:00,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.923076923076923) internal successors, (180), 26 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:55:00,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:55:00,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:55:00,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 04:55:00,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 04:55:00,362 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:55:00,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:55:00,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1945512330, now seen corresponding path program 12 times [2023-11-29 04:55:00,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:55:00,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547285971] [2023-11-29 04:55:00,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:55:00,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:55:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:55:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:55:01,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:55:01,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547285971] [2023-11-29 04:55:01,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547285971] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:55:01,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881436174] [2023-11-29 04:55:01,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:55:01,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:55:01,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:55:01,075 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:55:01,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 04:55:01,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 04:55:01,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:55:01,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 04:55:01,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:55:01,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:55:01,558 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 04:55:01,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2023-11-29 04:55:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:55:01,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:55:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:55:02,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881436174] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:55:02,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:55:02,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 10] total 28 [2023-11-29 04:55:02,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952415093] [2023-11-29 04:55:02,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:55:02,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 04:55:02,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:55:02,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 04:55:02,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-11-29 04:55:02,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:55:02,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 480 transitions, 7987 flow. Second operand has 28 states, 28 states have (on average 6.892857142857143) internal successors, (193), 28 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:55:02,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:55:02,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:55:02,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:55:36,633 INFO L124 PetriNetUnfolderBase]: 94177/136680 cut-off events. [2023-11-29 04:55:36,633 INFO L125 PetriNetUnfolderBase]: For 2302539/2302539 co-relation queries the response was YES. [2023-11-29 04:55:39,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794655 conditions, 136680 events. 94177/136680 cut-off events. For 2302539/2302539 co-relation queries the response was YES. Maximal size of possible extension queue 4875. Compared 1038803 event pairs, 24382 based on Foata normal form. 10/136690 useless extension candidates. Maximal degree in co-relation 794553. Up to 48510 conditions per place. [2023-11-29 04:55:39,622 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 575 selfloop transitions, 181 changer transitions 32/789 dead transitions. [2023-11-29 04:55:39,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 789 transitions, 12577 flow [2023-11-29 04:55:39,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 04:55:39,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 04:55:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 396 transitions. [2023-11-29 04:55:39,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40993788819875776 [2023-11-29 04:55:39,624 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 396 transitions. [2023-11-29 04:55:39,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 396 transitions. [2023-11-29 04:55:39,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:55:39,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 396 transitions. [2023-11-29 04:55:39,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 17.217391304347824) internal successors, (396), 23 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:55:39,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 42.0) internal successors, (1008), 24 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:55:39,626 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 42.0) internal successors, (1008), 24 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:55:39,626 INFO L175 Difference]: Start difference. First operand has 271 places, 480 transitions, 7987 flow. Second operand 23 states and 396 transitions. [2023-11-29 04:55:39,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 789 transitions, 12577 flow [2023-11-29 04:56:49,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 789 transitions, 12275 flow, removed 106 selfloop flow, removed 13 redundant places. [2023-11-29 04:56:49,762 INFO L231 Difference]: Finished difference. Result has 285 places, 482 transitions, 8320 flow [2023-11-29 04:56:49,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7759, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8320, PETRI_PLACES=285, PETRI_TRANSITIONS=482} [2023-11-29 04:56:49,763 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 246 predicate places. [2023-11-29 04:56:49,763 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 482 transitions, 8320 flow [2023-11-29 04:56:49,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.892857142857143) internal successors, (193), 28 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:56:49,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:56:49,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:56:49,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 04:56:49,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 04:56:49,964 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:56:49,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:56:49,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1698740930, now seen corresponding path program 13 times [2023-11-29 04:56:49,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:56:49,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328256019] [2023-11-29 04:56:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:56:49,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:56:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:56:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:56:50,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:56:50,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328256019] [2023-11-29 04:56:50,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328256019] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:56:50,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408859644] [2023-11-29 04:56:50,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:56:50,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:56:50,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:56:50,862 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:56:50,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 04:56:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:56:51,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 04:56:51,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:56:51,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:56:51,380 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 04:56:51,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2023-11-29 04:56:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:56:51,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:56:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:56:52,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408859644] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:56:52,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:56:52,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 29 [2023-11-29 04:56:52,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257519254] [2023-11-29 04:56:52,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:56:52,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 04:56:52,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:56:52,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 04:56:52,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:56:52,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:56:52,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 482 transitions, 8320 flow. Second operand has 29 states, 29 states have (on average 6.689655172413793) internal successors, (194), 29 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:56:52,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:56:52,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:56:52,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:57:30,015 INFO L124 PetriNetUnfolderBase]: 96697/140354 cut-off events. [2023-11-29 04:57:30,015 INFO L125 PetriNetUnfolderBase]: For 2421123/2421123 co-relation queries the response was YES. [2023-11-29 04:57:32,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825184 conditions, 140354 events. 96697/140354 cut-off events. For 2421123/2421123 co-relation queries the response was YES. Maximal size of possible extension queue 5063. Compared 1069592 event pairs, 28262 based on Foata normal form. 164/140518 useless extension candidates. Maximal degree in co-relation 825077. Up to 48798 conditions per place. [2023-11-29 04:57:33,582 INFO L140 encePairwiseOnDemand]: 23/42 looper letters, 576 selfloop transitions, 219 changer transitions 73/869 dead transitions. [2023-11-29 04:57:33,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 869 transitions, 13827 flow [2023-11-29 04:57:33,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 04:57:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-29 04:57:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 516 transitions. [2023-11-29 04:57:33,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39631336405529954 [2023-11-29 04:57:33,584 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 516 transitions. [2023-11-29 04:57:33,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 516 transitions. [2023-11-29 04:57:33,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:57:33,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 516 transitions. [2023-11-29 04:57:33,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 16.64516129032258) internal successors, (516), 31 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:57:33,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 42.0) internal successors, (1344), 32 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:57:33,589 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 42.0) internal successors, (1344), 32 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:57:33,589 INFO L175 Difference]: Start difference. First operand has 285 places, 482 transitions, 8320 flow. Second operand 31 states and 516 transitions. [2023-11-29 04:57:33,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 869 transitions, 13827 flow [2023-11-29 04:58:40,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 869 transitions, 13410 flow, removed 82 selfloop flow, removed 18 redundant places. [2023-11-29 04:58:40,438 INFO L231 Difference]: Finished difference. Result has 305 places, 503 transitions, 9054 flow [2023-11-29 04:58:40,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7975, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=9054, PETRI_PLACES=305, PETRI_TRANSITIONS=503} [2023-11-29 04:58:40,439 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 266 predicate places. [2023-11-29 04:58:40,439 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 503 transitions, 9054 flow [2023-11-29 04:58:40,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.689655172413793) internal successors, (194), 29 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:58:40,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:58:40,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:58:40,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 04:58:40,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 04:58:40,640 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:58:40,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:58:40,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1749845972, now seen corresponding path program 14 times [2023-11-29 04:58:40,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:58:40,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311815709] [2023-11-29 04:58:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:58:40,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:58:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:58:41,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:58:41,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311815709] [2023-11-29 04:58:41,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311815709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:58:41,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105096772] [2023-11-29 04:58:41,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:58:41,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:58:41,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:58:41,509 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:58:41,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e9e67c6-5a1d-42db-9f6f-bfba630da7a4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 04:58:41,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:58:41,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:58:41,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 04:58:41,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:58:41,929 INFO L349 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-11-29 04:58:41,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 41 [2023-11-29 04:58:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:58:41,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:58:42,906 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2023-11-29 04:58:42,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2023-11-29 04:58:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:58:43,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105096772] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:58:43,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:58:43,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 29 [2023-11-29 04:58:43,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812922728] [2023-11-29 04:58:43,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:58:43,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 04:58:43,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:58:43,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 04:58:43,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:58:43,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 04:58:43,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 503 transitions, 9054 flow. Second operand has 29 states, 29 states have (on average 6.896551724137931) internal successors, (200), 29 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:58:43,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:58:43,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 04:58:43,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand