./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/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_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/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_b2b1ceba-d854-4638-97c4-0580ef7b4862/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 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:54:51,994 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:54:52,059 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:54:52,064 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:54:52,065 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:54:52,090 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:54:52,091 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:54:52,091 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:54:52,092 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:54:52,092 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:54:52,093 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:54:52,093 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:54:52,094 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:54:52,095 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:54:52,095 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:54:52,096 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:54:52,096 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:54:52,097 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:54:52,097 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:54:52,097 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:54:52,098 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:54:52,098 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:54:52,099 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:54:52,099 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:54:52,100 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:54:52,100 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:54:52,101 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:54:52,101 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:54:52,101 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:54:52,102 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:54:52,102 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:54:52,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:54:52,103 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:54:52,104 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:54:52,104 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:54:52,104 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:54:52,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:54:52,105 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:54:52,105 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:54:52,106 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:54:52,106 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:54:52,107 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:54:52,107 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_b2b1ceba-d854-4638-97c4-0580ef7b4862/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 [2023-11-29 05:54:52,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:54:52,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:54:52,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:54:52,365 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:54:52,365 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:54:52,366 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2023-11-29 05:54:55,113 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:54:55,281 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:54:55,281 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2023-11-29 05:54:55,289 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/data/92cbfaa48/f8f345a59086465ea5659013e5f38549/FLAG3a7bbfc08 [2023-11-29 05:54:55,304 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/data/92cbfaa48/f8f345a59086465ea5659013e5f38549 [2023-11-29 05:54:55,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:54:55,308 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:54:55,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:54:55,310 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:54:55,314 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:54:55,315 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:54:55" (1/1) ... [2023-11-29 05:54:55,316 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d1aa35a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:54:55, skipping insertion in model container [2023-11-29 05:54:55,316 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:54:55" (1/1) ... [2023-11-29 05:54:55,338 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:54:55,499 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_b2b1ceba-d854-4638-97c4-0580ef7b4862/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2767,2780] [2023-11-29 05:54:55,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:54:55,521 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:54:55,546 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_b2b1ceba-d854-4638-97c4-0580ef7b4862/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2767,2780] [2023-11-29 05:54:55,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:54:55,567 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:54:55,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:54:55 WrapperNode [2023-11-29 05:54:55,567 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:54:55,568 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:54:55,569 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:54:55,569 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:54:55,576 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:54:55" (1/1) ... [2023-11-29 05:54:55,587 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:54:55" (1/1) ... [2023-11-29 05:54:55,614 INFO L138 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 288 [2023-11-29 05:54:55,614 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:54:55,615 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:54:55,615 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:54:55,615 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:54:55,625 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:54:55" (1/1) ... [2023-11-29 05:54:55,625 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:54:55" (1/1) ... [2023-11-29 05:54:55,631 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:54:55" (1/1) ... [2023-11-29 05:54:55,651 INFO L175 MemorySlicer]: Split 23 memory accesses to 5 slices as follows [2, 15, 2, 2, 2]. 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, 3, 1, 1, 1]. [2023-11-29 05:54:55,651 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:54:55" (1/1) ... [2023-11-29 05:54:55,651 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:54:55" (1/1) ... [2023-11-29 05:54:55,664 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:54:55" (1/1) ... [2023-11-29 05:54:55,669 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:54:55" (1/1) ... [2023-11-29 05:54:55,672 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:54:55" (1/1) ... [2023-11-29 05:54:55,674 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:54:55" (1/1) ... [2023-11-29 05:54:55,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:54:55,680 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:54:55,681 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:54:55,681 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:54:55,682 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:54:55" (1/1) ... [2023-11-29 05:54:55,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:54:55,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:54:55,711 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:54:55,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:54:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:54:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:54:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:54:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:54:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:54:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:54:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 05:54:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:54:55,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:54:55,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:54:55,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:54:55,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 05:54:55,752 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:54:55,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:54:55,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:54:55,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:54:55,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 05:54:55,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 05:54:55,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:54:55,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:54:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:54:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:54:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 05:54:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:54:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:54:55,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:54:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:54:55,756 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 05:54:55,891 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:54:55,892 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:54:56,287 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:54:56,588 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:54:56,588 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 05:54:56,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:54:56 BoogieIcfgContainer [2023-11-29 05:54:56,589 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:54:56,591 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:54:56,591 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:54:56,593 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:54:56,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:54:55" (1/3) ... [2023-11-29 05:54:56,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21cf7688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:54:56, skipping insertion in model container [2023-11-29 05:54:56,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:54:55" (2/3) ... [2023-11-29 05:54:56,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21cf7688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:54:56, skipping insertion in model container [2023-11-29 05:54:56,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:54:56" (3/3) ... [2023-11-29 05:54:56,596 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2023-11-29 05:54:56,604 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 05:54:56,612 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:54:56,612 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:54:56,612 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:54:56,667 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 05:54:56,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 42 transitions, 105 flow [2023-11-29 05:54:56,722 INFO L124 PetriNetUnfolderBase]: 9/39 cut-off events. [2023-11-29 05:54:56,723 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:54:56,726 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 05:54:56,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 42 transitions, 105 flow [2023-11-29 05:54:56,730 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 94 flow [2023-11-29 05:54:56,739 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:54:56,745 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;@462d49c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:54:56,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 05:54:56,758 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:54:56,758 INFO L124 PetriNetUnfolderBase]: 9/37 cut-off events. [2023-11-29 05:54:56,758 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:54:56,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:56,759 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 05:54:56,759 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 05:54:56,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:56,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1836545607, now seen corresponding path program 1 times [2023-11-29 05:54:56,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:56,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199598269] [2023-11-29 05:54:56,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:56,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:57,315 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 05:54:57,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:57,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199598269] [2023-11-29 05:54:57,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199598269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:54:57,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:54:57,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:54:57,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974961449] [2023-11-29 05:54:57,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:54:57,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:54:57,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:57,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:54:57,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:54:57,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:54:57,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 94 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:57,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:57,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:54:57,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:54:58,287 INFO L124 PetriNetUnfolderBase]: 3107/4257 cut-off events. [2023-11-29 05:54:58,288 INFO L125 PetriNetUnfolderBase]: For 286/286 co-relation queries the response was YES. [2023-11-29 05:54:58,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8796 conditions, 4257 events. 3107/4257 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18192 event pairs, 284 based on Foata normal form. 1/3080 useless extension candidates. Maximal degree in co-relation 5627. Up to 1391 conditions per place. [2023-11-29 05:54:58,322 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 129 selfloop transitions, 13 changer transitions 3/146 dead transitions. [2023-11-29 05:54:58,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 146 transitions, 654 flow [2023-11-29 05:54:58,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:54:58,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:54:58,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2023-11-29 05:54:58,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-29 05:54:58,338 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 182 transitions. [2023-11-29 05:54:58,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 182 transitions. [2023-11-29 05:54:58,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:54:58,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 182 transitions. [2023-11-29 05:54:58,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 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 05:54:58,350 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 05:54:58,351 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 05:54:58,353 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 94 flow. Second operand 9 states and 182 transitions. [2023-11-29 05:54:58,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 146 transitions, 654 flow [2023-11-29 05:54:58,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 146 transitions, 606 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 05:54:58,367 INFO L231 Difference]: Finished difference. Result has 44 places, 51 transitions, 160 flow [2023-11-29 05:54:58,369 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=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=160, PETRI_PLACES=44, PETRI_TRANSITIONS=51} [2023-11-29 05:54:58,373 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2023-11-29 05:54:58,373 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 51 transitions, 160 flow [2023-11-29 05:54:58,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:58,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:58,374 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 05:54:58,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:54:58,374 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 05:54:58,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:58,375 INFO L85 PathProgramCache]: Analyzing trace with hash 575197119, now seen corresponding path program 2 times [2023-11-29 05:54:58,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:58,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645650016] [2023-11-29 05:54:58,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:58,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:58,617 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 05:54:58,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:58,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645650016] [2023-11-29 05:54:58,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645650016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:54:58,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:54:58,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:54:58,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901930526] [2023-11-29 05:54:58,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:54:58,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:54:58,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:58,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:54:58,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:54:58,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:54:58,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 51 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:58,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:58,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:54:58,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:54:59,443 INFO L124 PetriNetUnfolderBase]: 3637/5053 cut-off events. [2023-11-29 05:54:59,443 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2023-11-29 05:54:59,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11082 conditions, 5053 events. 3637/5053 cut-off events. For 603/603 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 23196 event pairs, 394 based on Foata normal form. 1/4147 useless extension candidates. Maximal degree in co-relation 7929. Up to 1577 conditions per place. [2023-11-29 05:54:59,478 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 131 selfloop transitions, 15 changer transitions 3/150 dead transitions. [2023-11-29 05:54:59,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 150 transitions, 687 flow [2023-11-29 05:54:59,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:54:59,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:54:59,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2023-11-29 05:54:59,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2023-11-29 05:54:59,481 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 184 transitions. [2023-11-29 05:54:59,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 184 transitions. [2023-11-29 05:54:59,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:54:59,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 184 transitions. [2023-11-29 05:54:59,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 20.444444444444443) internal successors, (184), 9 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:59,485 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 05:54:59,485 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 05:54:59,485 INFO L175 Difference]: Start difference. First operand has 44 places, 51 transitions, 160 flow. Second operand 9 states and 184 transitions. [2023-11-29 05:54:59,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 150 transitions, 687 flow [2023-11-29 05:54:59,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 150 transitions, 685 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-29 05:54:59,491 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 222 flow [2023-11-29 05:54:59,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=222, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2023-11-29 05:54:59,492 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 15 predicate places. [2023-11-29 05:54:59,492 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 222 flow [2023-11-29 05:54:59,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:59,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:59,493 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 05:54:59,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:54:59,493 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 05:54:59,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:59,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1036057779, now seen corresponding path program 1 times [2023-11-29 05:54:59,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:59,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928897081] [2023-11-29 05:54:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:59,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:59,638 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 05:54:59,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:59,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928897081] [2023-11-29 05:54:59,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928897081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:54:59,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:54:59,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:54:59,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007769136] [2023-11-29 05:54:59,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:54:59,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:54:59,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:59,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:54:59,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:54:59,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:54:59,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 222 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 05:54:59,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:59,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:54:59,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:00,211 INFO L124 PetriNetUnfolderBase]: 2484/3498 cut-off events. [2023-11-29 05:55:00,211 INFO L125 PetriNetUnfolderBase]: For 1638/1638 co-relation queries the response was YES. [2023-11-29 05:55:00,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8036 conditions, 3498 events. 2484/3498 cut-off events. For 1638/1638 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14866 event pairs, 902 based on Foata normal form. 0/2919 useless extension candidates. Maximal degree in co-relation 6143. Up to 1851 conditions per place. [2023-11-29 05:55:00,234 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 84 selfloop transitions, 6 changer transitions 2/93 dead transitions. [2023-11-29 05:55:00,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 93 transitions, 474 flow [2023-11-29 05:55:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:55:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:55:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2023-11-29 05:55:00,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2023-11-29 05:55:00,236 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 108 transitions. [2023-11-29 05:55:00,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 108 transitions. [2023-11-29 05:55:00,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:00,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 108 transitions. [2023-11-29 05:55:00,237 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 05:55:00,238 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 05:55:00,239 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 05:55:00,239 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 222 flow. Second operand 5 states and 108 transitions. [2023-11-29 05:55:00,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 93 transitions, 474 flow [2023-11-29 05:55:00,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 93 transitions, 451 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-29 05:55:00,245 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 188 flow [2023-11-29 05:55:00,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-11-29 05:55:00,246 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 14 predicate places. [2023-11-29 05:55:00,246 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 188 flow [2023-11-29 05:55:00,246 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 05:55:00,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:00,247 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 05:55:00,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:55:00,247 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 05:55:00,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:00,248 INFO L85 PathProgramCache]: Analyzing trace with hash -441669003, now seen corresponding path program 1 times [2023-11-29 05:55:00,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:00,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455043512] [2023-11-29 05:55:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:00,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:00,379 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 05:55:00,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:00,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455043512] [2023-11-29 05:55:00,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455043512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:00,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:55:00,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:55:00,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312777294] [2023-11-29 05:55:00,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:00,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:55:00,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:00,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:55:00,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:55:00,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:55:00,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 188 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 05:55:00,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:00,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:55:00,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:01,025 INFO L124 PetriNetUnfolderBase]: 3967/5688 cut-off events. [2023-11-29 05:55:01,025 INFO L125 PetriNetUnfolderBase]: For 2759/2759 co-relation queries the response was YES. [2023-11-29 05:55:01,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12860 conditions, 5688 events. 3967/5688 cut-off events. For 2759/2759 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 27051 event pairs, 1888 based on Foata normal form. 0/4821 useless extension candidates. Maximal degree in co-relation 10125. Up to 3497 conditions per place. [2023-11-29 05:55:01,102 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 91 selfloop transitions, 6 changer transitions 4/102 dead transitions. [2023-11-29 05:55:01,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 102 transitions, 538 flow [2023-11-29 05:55:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:55:01,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:55:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2023-11-29 05:55:01,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2023-11-29 05:55:01,103 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2023-11-29 05:55:01,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2023-11-29 05:55:01,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:01,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2023-11-29 05:55:01,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:01,106 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 05:55:01,106 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 05:55:01,106 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 188 flow. Second operand 5 states and 104 transitions. [2023-11-29 05:55:01,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 102 transitions, 538 flow [2023-11-29 05:55:01,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 102 transitions, 527 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:55:01,114 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 226 flow [2023-11-29 05:55:01,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2023-11-29 05:55:01,115 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 18 predicate places. [2023-11-29 05:55:01,115 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 226 flow [2023-11-29 05:55:01,115 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 05:55:01,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:01,116 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 05:55:01,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:55:01,116 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 05:55:01,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:01,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1318025214, now seen corresponding path program 1 times [2023-11-29 05:55:01,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:01,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040107453] [2023-11-29 05:55:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:01,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:01,360 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 05:55:01,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:01,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040107453] [2023-11-29 05:55:01,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040107453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:55:01,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736720172] [2023-11-29 05:55:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:01,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:55:01,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:55:01,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:55:01,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:55:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:01,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:55:01,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:55:01,662 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 05:55:01,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:55:01,766 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 05:55:01,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736720172] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:55:01,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:55:01,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 12 [2023-11-29 05:55:01,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167556501] [2023-11-29 05:55:01,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:01,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:55:01,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:01,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:55:01,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:55:01,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:55:01,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 226 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 05:55:01,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:01,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:55:01,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:02,549 INFO L124 PetriNetUnfolderBase]: 3456/4944 cut-off events. [2023-11-29 05:55:02,549 INFO L125 PetriNetUnfolderBase]: For 2668/2668 co-relation queries the response was YES. [2023-11-29 05:55:02,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11687 conditions, 4944 events. 3456/4944 cut-off events. For 2668/2668 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22302 event pairs, 2007 based on Foata normal form. 1/4354 useless extension candidates. Maximal degree in co-relation 9940. Up to 2228 conditions per place. [2023-11-29 05:55:02,577 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 115 selfloop transitions, 8 changer transitions 5/129 dead transitions. [2023-11-29 05:55:02,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 129 transitions, 690 flow [2023-11-29 05:55:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:55:02,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:55:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2023-11-29 05:55:02,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2023-11-29 05:55:02,579 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 144 transitions. [2023-11-29 05:55:02,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 144 transitions. [2023-11-29 05:55:02,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:02,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 144 transitions. [2023-11-29 05:55:02,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:02,581 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 05:55:02,581 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 05:55:02,581 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 226 flow. Second operand 7 states and 144 transitions. [2023-11-29 05:55:02,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 129 transitions, 690 flow [2023-11-29 05:55:02,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 129 transitions, 682 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 05:55:02,588 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 259 flow [2023-11-29 05:55:02,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=259, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2023-11-29 05:55:02,589 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 26 predicate places. [2023-11-29 05:55:02,589 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 259 flow [2023-11-29 05:55:02,589 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 05:55:02,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:02,589 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 05:55:02,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:55:02,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:55:02,793 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 05:55:02,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:02,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2101164558, now seen corresponding path program 1 times [2023-11-29 05:55:02,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:02,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060473025] [2023-11-29 05:55:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:02,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:02,994 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 05:55:02,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:02,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060473025] [2023-11-29 05:55:02,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060473025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:02,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:55:02,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:55:02,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218423426] [2023-11-29 05:55:02,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:02,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:55:02,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:02,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:55:02,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:55:02,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:55:02,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 259 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 05:55:02,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:02,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:55:02,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:03,989 INFO L124 PetriNetUnfolderBase]: 4187/6009 cut-off events. [2023-11-29 05:55:03,989 INFO L125 PetriNetUnfolderBase]: For 3111/3111 co-relation queries the response was YES. [2023-11-29 05:55:04,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14663 conditions, 6009 events. 4187/6009 cut-off events. For 3111/3111 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 28915 event pairs, 1425 based on Foata normal form. 2/5590 useless extension candidates. Maximal degree in co-relation 12250. Up to 2714 conditions per place. [2023-11-29 05:55:04,019 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 87 selfloop transitions, 5 changer transitions 65/158 dead transitions. [2023-11-29 05:55:04,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 158 transitions, 836 flow [2023-11-29 05:55:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:55:04,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:55:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2023-11-29 05:55:04,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2023-11-29 05:55:04,021 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 180 transitions. [2023-11-29 05:55:04,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 180 transitions. [2023-11-29 05:55:04,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:04,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 180 transitions. [2023-11-29 05:55:04,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 22.5) internal successors, (180), 8 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 05:55:04,023 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 05:55:04,023 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 05:55:04,024 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 259 flow. Second operand 8 states and 180 transitions. [2023-11-29 05:55:04,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 158 transitions, 836 flow [2023-11-29 05:55:04,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 158 transitions, 823 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-29 05:55:04,040 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 243 flow [2023-11-29 05:55:04,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=243, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2023-11-29 05:55:04,041 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 33 predicate places. [2023-11-29 05:55:04,041 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 243 flow [2023-11-29 05:55:04,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 05:55:04,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:04,041 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 05:55:04,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 05:55:04,042 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 05:55:04,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:04,042 INFO L85 PathProgramCache]: Analyzing trace with hash -134150480, now seen corresponding path program 1 times [2023-11-29 05:55:04,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:04,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609512756] [2023-11-29 05:55:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:04,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:04,259 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 05:55:04,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:04,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609512756] [2023-11-29 05:55:04,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609512756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:04,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:55:04,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:55:04,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930969950] [2023-11-29 05:55:04,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:04,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:55:04,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:04,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:55:04,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:55:04,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:55:04,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 243 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 05:55:04,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:04,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:55:04,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:05,702 INFO L124 PetriNetUnfolderBase]: 9349/13236 cut-off events. [2023-11-29 05:55:05,702 INFO L125 PetriNetUnfolderBase]: For 8746/8746 co-relation queries the response was YES. [2023-11-29 05:55:05,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32811 conditions, 13236 events. 9349/13236 cut-off events. For 8746/8746 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 70753 event pairs, 2673 based on Foata normal form. 4/12161 useless extension candidates. Maximal degree in co-relation 32730. Up to 3954 conditions per place. [2023-11-29 05:55:05,761 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 160 selfloop transitions, 28 changer transitions 13/202 dead transitions. [2023-11-29 05:55:05,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 202 transitions, 1199 flow [2023-11-29 05:55:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:55:05,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:55:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2023-11-29 05:55:05,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-11-29 05:55:05,763 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 196 transitions. [2023-11-29 05:55:05,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 196 transitions. [2023-11-29 05:55:05,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:05,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 196 transitions. [2023-11-29 05:55:05,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:05,765 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 05:55:05,766 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 05:55:05,766 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 243 flow. Second operand 9 states and 196 transitions. [2023-11-29 05:55:05,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 202 transitions, 1199 flow [2023-11-29 05:55:05,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 202 transitions, 1132 flow, removed 27 selfloop flow, removed 7 redundant places. [2023-11-29 05:55:05,821 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 499 flow [2023-11-29 05:55:05,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=499, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2023-11-29 05:55:05,822 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 37 predicate places. [2023-11-29 05:55:05,822 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 499 flow [2023-11-29 05:55:05,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 05:55:05,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:05,822 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 05:55:05,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 05:55:05,823 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 05:55:05,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:05,823 INFO L85 PathProgramCache]: Analyzing trace with hash 481232024, now seen corresponding path program 2 times [2023-11-29 05:55:05,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:05,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62536679] [2023-11-29 05:55:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:05,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:05,963 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 05:55:05,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:05,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62536679] [2023-11-29 05:55:05,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62536679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:05,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:55:05,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:55:05,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865175164] [2023-11-29 05:55:05,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:05,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:55:05,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:05,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:55:05,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:55:05,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:55:05,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 499 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 05:55:05,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:05,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:55:05,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:08,109 INFO L124 PetriNetUnfolderBase]: 13664/19332 cut-off events. [2023-11-29 05:55:08,109 INFO L125 PetriNetUnfolderBase]: For 16705/16705 co-relation queries the response was YES. [2023-11-29 05:55:08,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51103 conditions, 19332 events. 13664/19332 cut-off events. For 16705/16705 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 109265 event pairs, 2832 based on Foata normal form. 4/18730 useless extension candidates. Maximal degree in co-relation 46930. Up to 4874 conditions per place. [2023-11-29 05:55:08,219 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 208 selfloop transitions, 28 changer transitions 18/255 dead transitions. [2023-11-29 05:55:08,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 255 transitions, 1795 flow [2023-11-29 05:55:08,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:55:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:55:08,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2023-11-29 05:55:08,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190476190476191 [2023-11-29 05:55:08,220 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 218 transitions. [2023-11-29 05:55:08,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 218 transitions. [2023-11-29 05:55:08,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:08,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 218 transitions. [2023-11-29 05:55:08,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 21.8) internal successors, (218), 10 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:08,222 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 05:55:08,222 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 05:55:08,222 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 499 flow. Second operand 10 states and 218 transitions. [2023-11-29 05:55:08,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 255 transitions, 1795 flow [2023-11-29 05:55:08,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 255 transitions, 1793 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-29 05:55:08,302 INFO L231 Difference]: Finished difference. Result has 91 places, 98 transitions, 776 flow [2023-11-29 05:55:08,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=776, PETRI_PLACES=91, PETRI_TRANSITIONS=98} [2023-11-29 05:55:08,303 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 52 predicate places. [2023-11-29 05:55:08,303 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 98 transitions, 776 flow [2023-11-29 05:55:08,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 05:55:08,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:08,304 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 05:55:08,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 05:55:08,304 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 05:55:08,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:08,305 INFO L85 PathProgramCache]: Analyzing trace with hash -557933711, now seen corresponding path program 1 times [2023-11-29 05:55:08,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:08,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989221803] [2023-11-29 05:55:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:08,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:08,480 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 05:55:08,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:08,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989221803] [2023-11-29 05:55:08,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989221803] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:55:08,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490664718] [2023-11-29 05:55:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:08,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:55:08,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:55:08,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:55:08,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:55:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:08,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:55:08,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:55:08,724 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 05:55:08,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:55:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:55:08,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490664718] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:55:08,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:55:08,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 16 [2023-11-29 05:55:08,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122456214] [2023-11-29 05:55:08,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:08,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:55:08,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:08,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:55:08,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:55:08,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:55:08,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 98 transitions, 776 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:08,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:08,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:55:08,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:10,857 INFO L124 PetriNetUnfolderBase]: 12809/18124 cut-off events. [2023-11-29 05:55:10,858 INFO L125 PetriNetUnfolderBase]: For 28584/28584 co-relation queries the response was YES. [2023-11-29 05:55:10,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52649 conditions, 18124 events. 12809/18124 cut-off events. For 28584/28584 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 102668 event pairs, 5674 based on Foata normal form. 4/17576 useless extension candidates. Maximal degree in co-relation 48015. Up to 9742 conditions per place. [2023-11-29 05:55:10,945 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 166 selfloop transitions, 34 changer transitions 15/216 dead transitions. [2023-11-29 05:55:10,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 216 transitions, 1653 flow [2023-11-29 05:55:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:55:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:55:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2023-11-29 05:55:10,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2023-11-29 05:55:10,947 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 187 transitions. [2023-11-29 05:55:10,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 187 transitions. [2023-11-29 05:55:10,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:10,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 187 transitions. [2023-11-29 05:55:10,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 23.375) internal successors, (187), 8 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:10,949 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 05:55:10,949 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 05:55:10,949 INFO L175 Difference]: Start difference. First operand has 91 places, 98 transitions, 776 flow. Second operand 8 states and 187 transitions. [2023-11-29 05:55:10,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 216 transitions, 1653 flow [2023-11-29 05:55:11,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 216 transitions, 1626 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-29 05:55:11,065 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 849 flow [2023-11-29 05:55:11,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=849, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2023-11-29 05:55:11,066 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 57 predicate places. [2023-11-29 05:55:11,066 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 849 flow [2023-11-29 05:55:11,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:11,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:11,067 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 05:55:11,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:55:11,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:55:11,272 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 05:55:11,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:11,273 INFO L85 PathProgramCache]: Analyzing trace with hash 451103364, now seen corresponding path program 2 times [2023-11-29 05:55:11,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:11,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258587736] [2023-11-29 05:55:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:11,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:11,452 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 05:55:11,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:11,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258587736] [2023-11-29 05:55:11,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258587736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:11,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:55:11,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:55:11,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348154749] [2023-11-29 05:55:11,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:11,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:55:11,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:11,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:55:11,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:55:11,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:55:11,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 849 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 05:55:11,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:11,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:55:11,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:14,696 INFO L124 PetriNetUnfolderBase]: 21780/31037 cut-off events. [2023-11-29 05:55:14,696 INFO L125 PetriNetUnfolderBase]: For 54640/54640 co-relation queries the response was YES. [2023-11-29 05:55:14,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92675 conditions, 31037 events. 21780/31037 cut-off events. For 54640/54640 co-relation queries the response was YES. Maximal size of possible extension queue 1318. Compared 193521 event pairs, 8846 based on Foata normal form. 8/30493 useless extension candidates. Maximal degree in co-relation 83697. Up to 11897 conditions per place. [2023-11-29 05:55:14,894 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 176 selfloop transitions, 9 changer transitions 81/267 dead transitions. [2023-11-29 05:55:14,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 267 transitions, 2430 flow [2023-11-29 05:55:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:55:14,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:55:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2023-11-29 05:55:14,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2023-11-29 05:55:14,896 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 185 transitions. [2023-11-29 05:55:14,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 185 transitions. [2023-11-29 05:55:14,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:14,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 185 transitions. [2023-11-29 05:55:14,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 23.125) internal successors, (185), 8 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 05:55:14,898 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 05:55:14,898 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 05:55:14,898 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 849 flow. Second operand 8 states and 185 transitions. [2023-11-29 05:55:14,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 267 transitions, 2430 flow [2023-11-29 05:55:15,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 267 transitions, 2328 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-11-29 05:55:15,318 INFO L231 Difference]: Finished difference. Result has 103 places, 100 transitions, 833 flow [2023-11-29 05:55:15,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=833, PETRI_PLACES=103, PETRI_TRANSITIONS=100} [2023-11-29 05:55:15,319 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 64 predicate places. [2023-11-29 05:55:15,319 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 833 flow [2023-11-29 05:55:15,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 05:55:15,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:15,319 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 05:55:15,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 05:55:15,320 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 05:55:15,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:15,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1635839838, now seen corresponding path program 3 times [2023-11-29 05:55:15,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:15,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987761383] [2023-11-29 05:55:15,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:15,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:15,506 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 05:55:15,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:15,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987761383] [2023-11-29 05:55:15,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987761383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:15,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:55:15,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:55:15,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258210314] [2023-11-29 05:55:15,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:15,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:55:15,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:15,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:55:15,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:55:15,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:55:15,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 100 transitions, 833 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 05:55:15,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:15,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:55:15,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:18,716 INFO L124 PetriNetUnfolderBase]: 20237/28894 cut-off events. [2023-11-29 05:55:18,716 INFO L125 PetriNetUnfolderBase]: For 51073/51073 co-relation queries the response was YES. [2023-11-29 05:55:18,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89516 conditions, 28894 events. 20237/28894 cut-off events. For 51073/51073 co-relation queries the response was YES. Maximal size of possible extension queue 1165. Compared 176549 event pairs, 8854 based on Foata normal form. 8/28350 useless extension candidates. Maximal degree in co-relation 89376. Up to 11897 conditions per place. [2023-11-29 05:55:18,937 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 140 selfloop transitions, 8 changer transitions 103/252 dead transitions. [2023-11-29 05:55:18,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 252 transitions, 2236 flow [2023-11-29 05:55:18,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:55:18,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:55:18,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2023-11-29 05:55:18,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2023-11-29 05:55:18,939 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 178 transitions. [2023-11-29 05:55:18,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 178 transitions. [2023-11-29 05:55:18,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:18,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 178 transitions. [2023-11-29 05:55:18,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 22.25) internal successors, (178), 8 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:18,941 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 05:55:18,941 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 05:55:18,941 INFO L175 Difference]: Start difference. First operand has 103 places, 100 transitions, 833 flow. Second operand 8 states and 178 transitions. [2023-11-29 05:55:18,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 252 transitions, 2236 flow [2023-11-29 05:55:19,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 252 transitions, 2206 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-29 05:55:19,337 INFO L231 Difference]: Finished difference. Result has 107 places, 100 transitions, 843 flow [2023-11-29 05:55:19,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=843, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2023-11-29 05:55:19,338 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 68 predicate places. [2023-11-29 05:55:19,338 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 843 flow [2023-11-29 05:55:19,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 05:55:19,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:19,338 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 05:55:19,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 05:55:19,339 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 05:55:19,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:19,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1995530954, now seen corresponding path program 3 times [2023-11-29 05:55:19,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:19,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21809143] [2023-11-29 05:55:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:19,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:19,539 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 05:55:19,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:19,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21809143] [2023-11-29 05:55:19,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21809143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:19,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:55:19,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:55:19,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821599683] [2023-11-29 05:55:19,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:19,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:55:19,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:19,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:55:19,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:55:19,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:55:19,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 843 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 05:55:19,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:19,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:55:19,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:21,967 INFO L124 PetriNetUnfolderBase]: 13399/19062 cut-off events. [2023-11-29 05:55:21,967 INFO L125 PetriNetUnfolderBase]: For 33471/33471 co-relation queries the response was YES. [2023-11-29 05:55:22,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58228 conditions, 19062 events. 13399/19062 cut-off events. For 33471/33471 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 108767 event pairs, 4442 based on Foata normal form. 2/18512 useless extension candidates. Maximal degree in co-relation 58106. Up to 5468 conditions per place. [2023-11-29 05:55:22,063 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 32 changer transitions 27/246 dead transitions. [2023-11-29 05:55:22,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 246 transitions, 2094 flow [2023-11-29 05:55:22,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:55:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:55:22,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2023-11-29 05:55:22,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2023-11-29 05:55:22,065 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 199 transitions. [2023-11-29 05:55:22,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 199 transitions. [2023-11-29 05:55:22,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:22,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 199 transitions. [2023-11-29 05:55:22,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 22.11111111111111) internal successors, (199), 9 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:22,067 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 05:55:22,068 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 05:55:22,068 INFO L175 Difference]: Start difference. First operand has 107 places, 100 transitions, 843 flow. Second operand 9 states and 199 transitions. [2023-11-29 05:55:22,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 246 transitions, 2094 flow [2023-11-29 05:55:22,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 246 transitions, 2042 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-11-29 05:55:22,232 INFO L231 Difference]: Finished difference. Result has 109 places, 110 transitions, 1069 flow [2023-11-29 05:55:22,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1069, PETRI_PLACES=109, PETRI_TRANSITIONS=110} [2023-11-29 05:55:22,233 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 70 predicate places. [2023-11-29 05:55:22,233 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 110 transitions, 1069 flow [2023-11-29 05:55:22,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 05:55:22,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:22,233 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 05:55:22,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 05:55:22,233 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 05:55:22,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:22,233 INFO L85 PathProgramCache]: Analyzing trace with hash -932569587, now seen corresponding path program 1 times [2023-11-29 05:55:22,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:22,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535249076] [2023-11-29 05:55:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:22,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:22,329 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 05:55:22,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:22,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535249076] [2023-11-29 05:55:22,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535249076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:22,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:55:22,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:55:22,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611194731] [2023-11-29 05:55:22,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:22,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:55:22,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:22,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:55:22,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:55:22,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:55:22,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 110 transitions, 1069 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:22,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:22,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:55:22,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:25,508 INFO L124 PetriNetUnfolderBase]: 21376/30187 cut-off events. [2023-11-29 05:55:25,509 INFO L125 PetriNetUnfolderBase]: For 63717/63717 co-relation queries the response was YES. [2023-11-29 05:55:25,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94196 conditions, 30187 events. 21376/30187 cut-off events. For 63717/63717 co-relation queries the response was YES. Maximal size of possible extension queue 1267. Compared 183920 event pairs, 3144 based on Foata normal form. 1/29406 useless extension candidates. Maximal degree in co-relation 84619. Up to 13714 conditions per place. [2023-11-29 05:55:25,722 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 202 selfloop transitions, 36 changer transitions 1/240 dead transitions. [2023-11-29 05:55:25,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 240 transitions, 2492 flow [2023-11-29 05:55:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:55:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:55:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2023-11-29 05:55:25,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-11-29 05:55:25,723 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 138 transitions. [2023-11-29 05:55:25,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 138 transitions. [2023-11-29 05:55:25,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:25,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 138 transitions. [2023-11-29 05:55:25,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:25,725 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 05:55:25,725 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 05:55:25,725 INFO L175 Difference]: Start difference. First operand has 109 places, 110 transitions, 1069 flow. Second operand 6 states and 138 transitions. [2023-11-29 05:55:25,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 240 transitions, 2492 flow [2023-11-29 05:55:26,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 240 transitions, 2281 flow, removed 63 selfloop flow, removed 7 redundant places. [2023-11-29 05:55:26,413 INFO L231 Difference]: Finished difference. Result has 110 places, 138 transitions, 1373 flow [2023-11-29 05:55:26,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1373, PETRI_PLACES=110, PETRI_TRANSITIONS=138} [2023-11-29 05:55:26,414 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 71 predicate places. [2023-11-29 05:55:26,414 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 138 transitions, 1373 flow [2023-11-29 05:55:26,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:26,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:26,415 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 05:55:26,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 05:55:26,415 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 05:55:26,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:26,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1698574661, now seen corresponding path program 2 times [2023-11-29 05:55:26,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:26,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710817928] [2023-11-29 05:55:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:26,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:26,539 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 05:55:26,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:26,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710817928] [2023-11-29 05:55:26,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710817928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:26,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:55:26,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:55:26,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584021507] [2023-11-29 05:55:26,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:26,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:55:26,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:26,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:55:26,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:55:26,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:55:26,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 138 transitions, 1373 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:26,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:26,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:55:26,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:30,875 INFO L124 PetriNetUnfolderBase]: 27076/37983 cut-off events. [2023-11-29 05:55:30,876 INFO L125 PetriNetUnfolderBase]: For 86889/86889 co-relation queries the response was YES. [2023-11-29 05:55:31,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124803 conditions, 37983 events. 27076/37983 cut-off events. For 86889/86889 co-relation queries the response was YES. Maximal size of possible extension queue 1642. Compared 236246 event pairs, 4344 based on Foata normal form. 1/37980 useless extension candidates. Maximal degree in co-relation 104456. Up to 19044 conditions per place. [2023-11-29 05:55:31,151 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 198 selfloop transitions, 54 changer transitions 1/254 dead transitions. [2023-11-29 05:55:31,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 254 transitions, 2672 flow [2023-11-29 05:55:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:55:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:55:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2023-11-29 05:55:31,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-29 05:55:31,152 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 140 transitions. [2023-11-29 05:55:31,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 140 transitions. [2023-11-29 05:55:31,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:31,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 140 transitions. [2023-11-29 05:55:31,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:31,154 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 05:55:31,154 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 05:55:31,154 INFO L175 Difference]: Start difference. First operand has 110 places, 138 transitions, 1373 flow. Second operand 6 states and 140 transitions. [2023-11-29 05:55:31,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 254 transitions, 2672 flow [2023-11-29 05:55:31,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 254 transitions, 2644 flow, removed 14 selfloop flow, removed 0 redundant places. [2023-11-29 05:55:31,659 INFO L231 Difference]: Finished difference. Result has 118 places, 164 transitions, 1882 flow [2023-11-29 05:55:31,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1882, PETRI_PLACES=118, PETRI_TRANSITIONS=164} [2023-11-29 05:55:31,660 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 79 predicate places. [2023-11-29 05:55:31,660 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 164 transitions, 1882 flow [2023-11-29 05:55:31,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:31,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:31,661 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 05:55:31,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 05:55:31,661 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 05:55:31,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:31,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2124707777, now seen corresponding path program 3 times [2023-11-29 05:55:31,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:31,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568720861] [2023-11-29 05:55:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:31,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:31,767 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 05:55:31,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:31,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568720861] [2023-11-29 05:55:31,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568720861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:31,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:55:31,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:55:31,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535048359] [2023-11-29 05:55:31,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:31,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:55:31,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:31,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:55:31,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:55:31,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:55:31,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 164 transitions, 1882 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:31,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:31,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:55:31,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:36,987 INFO L124 PetriNetUnfolderBase]: 30082/42312 cut-off events. [2023-11-29 05:55:36,987 INFO L125 PetriNetUnfolderBase]: For 127508/127508 co-relation queries the response was YES. [2023-11-29 05:55:37,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145462 conditions, 42312 events. 30082/42312 cut-off events. For 127508/127508 co-relation queries the response was YES. Maximal size of possible extension queue 1800. Compared 267037 event pairs, 5554 based on Foata normal form. 1/42309 useless extension candidates. Maximal degree in co-relation 123583. Up to 22226 conditions per place. [2023-11-29 05:55:37,342 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 139 selfloop transitions, 122 changer transitions 1/263 dead transitions. [2023-11-29 05:55:37,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 263 transitions, 2995 flow [2023-11-29 05:55:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:55:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:55:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2023-11-29 05:55:37,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2023-11-29 05:55:37,343 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 136 transitions. [2023-11-29 05:55:37,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 136 transitions. [2023-11-29 05:55:37,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:37,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 136 transitions. [2023-11-29 05:55:37,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:37,344 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 05:55:37,344 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 05:55:37,344 INFO L175 Difference]: Start difference. First operand has 118 places, 164 transitions, 1882 flow. Second operand 6 states and 136 transitions. [2023-11-29 05:55:37,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 263 transitions, 2995 flow [2023-11-29 05:55:38,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 263 transitions, 2933 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-11-29 05:55:38,553 INFO L231 Difference]: Finished difference. Result has 124 places, 194 transitions, 2542 flow [2023-11-29 05:55:38,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2542, PETRI_PLACES=124, PETRI_TRANSITIONS=194} [2023-11-29 05:55:38,554 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 85 predicate places. [2023-11-29 05:55:38,554 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 194 transitions, 2542 flow [2023-11-29 05:55:38,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:38,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:38,554 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 05:55:38,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 05:55:38,554 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 05:55:38,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:38,555 INFO L85 PathProgramCache]: Analyzing trace with hash -588371997, now seen corresponding path program 4 times [2023-11-29 05:55:38,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:38,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615593199] [2023-11-29 05:55:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:38,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:38,653 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 05:55:38,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:38,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615593199] [2023-11-29 05:55:38,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615593199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:38,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:55:38,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:55:38,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971010305] [2023-11-29 05:55:38,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:38,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:55:38,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:38,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:55:38,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:55:38,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:55:38,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 194 transitions, 2542 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:38,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:38,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:55:38,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:44,405 INFO L124 PetriNetUnfolderBase]: 32582/46198 cut-off events. [2023-11-29 05:55:44,405 INFO L125 PetriNetUnfolderBase]: For 185259/185259 co-relation queries the response was YES. [2023-11-29 05:55:44,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167945 conditions, 46198 events. 32582/46198 cut-off events. For 185259/185259 co-relation queries the response was YES. Maximal size of possible extension queue 1944. Compared 297576 event pairs, 5440 based on Foata normal form. 1/46195 useless extension candidates. Maximal degree in co-relation 140213. Up to 18084 conditions per place. [2023-11-29 05:55:44,782 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 250 selfloop transitions, 63 changer transitions 1/315 dead transitions. [2023-11-29 05:55:44,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 315 transitions, 4331 flow [2023-11-29 05:55:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:55:44,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:55:44,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2023-11-29 05:55:44,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2023-11-29 05:55:44,784 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 134 transitions. [2023-11-29 05:55:44,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 134 transitions. [2023-11-29 05:55:44,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:44,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 134 transitions. [2023-11-29 05:55:44,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:44,786 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 05:55:44,786 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 05:55:44,786 INFO L175 Difference]: Start difference. First operand has 124 places, 194 transitions, 2542 flow. Second operand 6 states and 134 transitions. [2023-11-29 05:55:44,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 315 transitions, 4331 flow [2023-11-29 05:55:46,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 315 transitions, 4269 flow, removed 21 selfloop flow, removed 2 redundant places. [2023-11-29 05:55:46,573 INFO L231 Difference]: Finished difference. Result has 130 places, 213 transitions, 3019 flow [2023-11-29 05:55:46,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3019, PETRI_PLACES=130, PETRI_TRANSITIONS=213} [2023-11-29 05:55:46,573 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 91 predicate places. [2023-11-29 05:55:46,573 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 213 transitions, 3019 flow [2023-11-29 05:55:46,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:46,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:46,574 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 05:55:46,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 05:55:46,574 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 05:55:46,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:46,574 INFO L85 PathProgramCache]: Analyzing trace with hash 132907375, now seen corresponding path program 5 times [2023-11-29 05:55:46,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:46,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234426] [2023-11-29 05:55:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:46,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:46,783 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 05:55:46,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:46,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234426] [2023-11-29 05:55:46,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:46,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:55:46,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:55:46,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814713149] [2023-11-29 05:55:46,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:46,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:55:46,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:46,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:55:46,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:55:46,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:55:46,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 213 transitions, 3019 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:46,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:46,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:55:46,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:52,595 INFO L124 PetriNetUnfolderBase]: 32582/46196 cut-off events. [2023-11-29 05:55:52,595 INFO L125 PetriNetUnfolderBase]: For 229108/229108 co-relation queries the response was YES. [2023-11-29 05:55:52,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176564 conditions, 46196 events. 32582/46196 cut-off events. For 229108/229108 co-relation queries the response was YES. Maximal size of possible extension queue 1942. Compared 300258 event pairs, 4610 based on Foata normal form. 1/46193 useless extension candidates. Maximal degree in co-relation 156405. Up to 19768 conditions per place. [2023-11-29 05:55:53,178 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 163 selfloop transitions, 139 changer transitions 1/304 dead transitions. [2023-11-29 05:55:53,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 304 transitions, 4258 flow [2023-11-29 05:55:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:55:53,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:55:53,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2023-11-29 05:55:53,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-11-29 05:55:53,180 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 138 transitions. [2023-11-29 05:55:53,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 138 transitions. [2023-11-29 05:55:53,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:53,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 138 transitions. [2023-11-29 05:55:53,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:53,181 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 05:55:53,182 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 05:55:53,182 INFO L175 Difference]: Start difference. First operand has 130 places, 213 transitions, 3019 flow. Second operand 6 states and 138 transitions. [2023-11-29 05:55:53,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 304 transitions, 4258 flow [2023-11-29 05:55:55,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 304 transitions, 4190 flow, removed 29 selfloop flow, removed 1 redundant places. [2023-11-29 05:55:55,759 INFO L231 Difference]: Finished difference. Result has 137 places, 231 transitions, 3682 flow [2023-11-29 05:55:55,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3682, PETRI_PLACES=137, PETRI_TRANSITIONS=231} [2023-11-29 05:55:55,759 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 98 predicate places. [2023-11-29 05:55:55,760 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 231 transitions, 3682 flow [2023-11-29 05:55:55,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:55,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:55,760 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 05:55:55,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 05:55:55,760 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 05:55:55,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:55,760 INFO L85 PathProgramCache]: Analyzing trace with hash -293225741, now seen corresponding path program 6 times [2023-11-29 05:55:55,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:55,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142167765] [2023-11-29 05:55:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:55,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:55,833 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 05:55:55,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:55,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142167765] [2023-11-29 05:55:55,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142167765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:55:55,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:55:55,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:55:55,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301597984] [2023-11-29 05:55:55,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:55:55,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:55:55,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:55:55,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:55:55,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:55:55,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:55:55,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 231 transitions, 3682 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:55,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:55,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:55:55,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:56:02,512 INFO L124 PetriNetUnfolderBase]: 32582/46194 cut-off events. [2023-11-29 05:56:02,512 INFO L125 PetriNetUnfolderBase]: For 275853/275853 co-relation queries the response was YES. [2023-11-29 05:56:02,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183340 conditions, 46194 events. 32582/46194 cut-off events. For 275853/275853 co-relation queries the response was YES. Maximal size of possible extension queue 1944. Compared 297862 event pairs, 5916 based on Foata normal form. 1/46191 useless extension candidates. Maximal degree in co-relation 164645. Up to 17991 conditions per place. [2023-11-29 05:56:03,096 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 219 selfloop transitions, 110 changer transitions 1/331 dead transitions. [2023-11-29 05:56:03,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 331 transitions, 5275 flow [2023-11-29 05:56:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:56:03,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:56:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2023-11-29 05:56:03,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2023-11-29 05:56:03,098 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 134 transitions. [2023-11-29 05:56:03,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 134 transitions. [2023-11-29 05:56:03,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:56:03,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 134 transitions. [2023-11-29 05:56:03,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:03,100 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 05:56:03,100 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 05:56:03,100 INFO L175 Difference]: Start difference. First operand has 137 places, 231 transitions, 3682 flow. Second operand 6 states and 134 transitions. [2023-11-29 05:56:03,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 331 transitions, 5275 flow [2023-11-29 05:56:05,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 331 transitions, 5061 flow, removed 27 selfloop flow, removed 2 redundant places. [2023-11-29 05:56:05,825 INFO L231 Difference]: Finished difference. Result has 143 places, 266 transitions, 4596 flow [2023-11-29 05:56:05,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3509, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4596, PETRI_PLACES=143, PETRI_TRANSITIONS=266} [2023-11-29 05:56:05,825 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 104 predicate places. [2023-11-29 05:56:05,825 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 266 transitions, 4596 flow [2023-11-29 05:56:05,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:05,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:56:05,826 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 05:56:05,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 05:56:05,826 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 05:56:05,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:05,826 INFO L85 PathProgramCache]: Analyzing trace with hash -681266282, now seen corresponding path program 1 times [2023-11-29 05:56:05,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:05,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967192290] [2023-11-29 05:56:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:05,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:05,987 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 05:56:05,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:05,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967192290] [2023-11-29 05:56:05,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967192290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:05,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618713765] [2023-11-29 05:56:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:05,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:05,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:05,989 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:05,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:56:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:06,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:56:06,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:06,251 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 05:56:06,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:56:06,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618713765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:56:06,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:56:06,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 05:56:06,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989679564] [2023-11-29 05:56:06,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:06,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:56:06,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:06,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:56:06,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:56:06,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:56:06,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 266 transitions, 4596 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 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 05:56:06,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:56:06,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:56:06,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:56:20,145 INFO L124 PetriNetUnfolderBase]: 62982/89126 cut-off events. [2023-11-29 05:56:20,145 INFO L125 PetriNetUnfolderBase]: For 631175/631175 co-relation queries the response was YES. [2023-11-29 05:56:20,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365581 conditions, 89126 events. 62982/89126 cut-off events. For 631175/631175 co-relation queries the response was YES. Maximal size of possible extension queue 3667. Compared 624291 event pairs, 28494 based on Foata normal form. 22/89141 useless extension candidates. Maximal degree in co-relation 330961. Up to 33353 conditions per place. [2023-11-29 05:56:21,109 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 536 selfloop transitions, 39 changer transitions 211/787 dead transitions. [2023-11-29 05:56:21,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 787 transitions, 13588 flow [2023-11-29 05:56:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:56:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 05:56:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 303 transitions. [2023-11-29 05:56:21,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2023-11-29 05:56:21,111 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 303 transitions. [2023-11-29 05:56:21,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 303 transitions. [2023-11-29 05:56:21,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:56:21,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 303 transitions. [2023-11-29 05:56:21,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 16.833333333333332) internal successors, (303), 18 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:21,113 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 05:56:21,113 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 05:56:21,113 INFO L175 Difference]: Start difference. First operand has 143 places, 266 transitions, 4596 flow. Second operand 18 states and 303 transitions. [2023-11-29 05:56:21,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 787 transitions, 13588 flow [2023-11-29 05:56:34,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 787 transitions, 13298 flow, removed 61 selfloop flow, removed 2 redundant places. [2023-11-29 05:56:34,141 INFO L231 Difference]: Finished difference. Result has 168 places, 242 transitions, 4038 flow [2023-11-29 05:56:34,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4506, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4038, PETRI_PLACES=168, PETRI_TRANSITIONS=242} [2023-11-29 05:56:34,142 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 129 predicate places. [2023-11-29 05:56:34,142 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 242 transitions, 4038 flow [2023-11-29 05:56:34,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 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 05:56:34,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:56:34,142 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 05:56:34,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 05:56:34,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:34,342 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 05:56:34,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:34,343 INFO L85 PathProgramCache]: Analyzing trace with hash 865802933, now seen corresponding path program 1 times [2023-11-29 05:56:34,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:34,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342940025] [2023-11-29 05:56:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:34,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:34,443 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 05:56:34,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:34,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342940025] [2023-11-29 05:56:34,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342940025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:56:34,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:56:34,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:56:34,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438216713] [2023-11-29 05:56:34,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:56:34,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:56:34,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:34,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:56:34,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:56:34,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:56:34,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 242 transitions, 4038 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:34,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:56:34,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:56:34,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:56:42,134 INFO L124 PetriNetUnfolderBase]: 36346/52452 cut-off events. [2023-11-29 05:56:42,134 INFO L125 PetriNetUnfolderBase]: For 339197/339197 co-relation queries the response was YES. [2023-11-29 05:56:42,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195904 conditions, 52452 events. 36346/52452 cut-off events. For 339197/339197 co-relation queries the response was YES. Maximal size of possible extension queue 2421. Compared 361570 event pairs, 17974 based on Foata normal form. 2368/54817 useless extension candidates. Maximal degree in co-relation 195842. Up to 26272 conditions per place. [2023-11-29 05:56:42,694 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 136 selfloop transitions, 4 changer transitions 110/251 dead transitions. [2023-11-29 05:56:42,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 251 transitions, 3872 flow [2023-11-29 05:56:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:56:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:56:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2023-11-29 05:56:42,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2023-11-29 05:56:42,695 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 110 transitions. [2023-11-29 05:56:42,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 110 transitions. [2023-11-29 05:56:42,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:56:42,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 110 transitions. [2023-11-29 05:56:42,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:42,696 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 05:56:42,696 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 05:56:42,696 INFO L175 Difference]: Start difference. First operand has 168 places, 242 transitions, 4038 flow. Second operand 6 states and 110 transitions. [2023-11-29 05:56:42,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 251 transitions, 3872 flow [2023-11-29 05:56:46,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 251 transitions, 3701 flow, removed 52 selfloop flow, removed 16 redundant places. [2023-11-29 05:56:46,996 INFO L231 Difference]: Finished difference. Result has 141 places, 141 transitions, 1828 flow [2023-11-29 05:56:46,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1828, PETRI_PLACES=141, PETRI_TRANSITIONS=141} [2023-11-29 05:56:46,997 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 102 predicate places. [2023-11-29 05:56:46,997 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 141 transitions, 1828 flow [2023-11-29 05:56:46,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:46,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:56:46,997 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:46,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 05:56:46,997 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 05:56:46,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:46,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1929775825, now seen corresponding path program 2 times [2023-11-29 05:56:46,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:46,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251477754] [2023-11-29 05:56:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:46,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:56:47,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:47,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251477754] [2023-11-29 05:56:47,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251477754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:56:47,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:56:47,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:56:47,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365470884] [2023-11-29 05:56:47,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:56:47,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:56:47,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:47,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:56:47,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:56:47,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:56:47,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 141 transitions, 1828 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:47,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:56:47,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:56:47,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:56:49,641 INFO L124 PetriNetUnfolderBase]: 15606/22360 cut-off events. [2023-11-29 05:56:49,641 INFO L125 PetriNetUnfolderBase]: For 136302/136302 co-relation queries the response was YES. [2023-11-29 05:56:49,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80993 conditions, 22360 events. 15606/22360 cut-off events. For 136302/136302 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 134357 event pairs, 8846 based on Foata normal form. 544/21942 useless extension candidates. Maximal degree in co-relation 80941. Up to 16585 conditions per place. [2023-11-29 05:56:49,853 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 110 selfloop transitions, 4 changer transitions 76/191 dead transitions. [2023-11-29 05:56:49,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 191 transitions, 2565 flow [2023-11-29 05:56:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:56:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:56:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2023-11-29 05:56:49,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2023-11-29 05:56:49,854 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 97 transitions. [2023-11-29 05:56:49,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 97 transitions. [2023-11-29 05:56:49,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:56:49,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 97 transitions. [2023-11-29 05:56:49,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:49,855 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 05:56:49,855 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 05:56:49,855 INFO L175 Difference]: Start difference. First operand has 141 places, 141 transitions, 1828 flow. Second operand 5 states and 97 transitions. [2023-11-29 05:56:49,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 191 transitions, 2565 flow [2023-11-29 05:56:51,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 191 transitions, 2393 flow, removed 40 selfloop flow, removed 14 redundant places. [2023-11-29 05:56:51,248 INFO L231 Difference]: Finished difference. Result has 110 places, 115 transitions, 1239 flow [2023-11-29 05:56:51,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1239, PETRI_PLACES=110, PETRI_TRANSITIONS=115} [2023-11-29 05:56:51,248 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 71 predicate places. [2023-11-29 05:56:51,248 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 115 transitions, 1239 flow [2023-11-29 05:56:51,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:51,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:56:51,249 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 05:56:51,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-29 05:56:51,249 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 05:56:51,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:51,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1076976963, now seen corresponding path program 1 times [2023-11-29 05:56:51,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:51,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027259240] [2023-11-29 05:56:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:51,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:51,418 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 05:56:51,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:51,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027259240] [2023-11-29 05:56:51,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027259240] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:51,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617709117] [2023-11-29 05:56:51,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:51,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:51,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:51,420 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:51,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:56:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:51,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:56:51,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:51,710 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 05:56:51,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:56:51,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617709117] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:56:51,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:56:51,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-11-29 05:56:51,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421075012] [2023-11-29 05:56:51,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:51,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:56:51,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:51,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:56:51,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:56:51,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:56:51,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 115 transitions, 1239 flow. Second operand has 18 states, 18 states have (on average 8.11111111111111) internal successors, (146), 18 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:51,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:56:51,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:56:51,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:56:55,727 INFO L124 PetriNetUnfolderBase]: 23799/33176 cut-off events. [2023-11-29 05:56:55,727 INFO L125 PetriNetUnfolderBase]: For 138984/138984 co-relation queries the response was YES. [2023-11-29 05:56:55,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112731 conditions, 33176 events. 23799/33176 cut-off events. For 138984/138984 co-relation queries the response was YES. Maximal size of possible extension queue 1406. Compared 199276 event pairs, 4768 based on Foata normal form. 8/31860 useless extension candidates. Maximal degree in co-relation 112689. Up to 15624 conditions per place. [2023-11-29 05:56:56,006 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 256 selfloop transitions, 56 changer transitions 10/323 dead transitions. [2023-11-29 05:56:56,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 323 transitions, 3650 flow [2023-11-29 05:56:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:56:56,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:56:56,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 233 transitions. [2023-11-29 05:56:56,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36984126984126986 [2023-11-29 05:56:56,008 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 233 transitions. [2023-11-29 05:56:56,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 233 transitions. [2023-11-29 05:56:56,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:56:56,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 233 transitions. [2023-11-29 05:56:56,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 15.533333333333333) internal successors, (233), 15 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:56,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 42.0) internal successors, (672), 16 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:56,010 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 42.0) internal successors, (672), 16 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:56,010 INFO L175 Difference]: Start difference. First operand has 110 places, 115 transitions, 1239 flow. Second operand 15 states and 233 transitions. [2023-11-29 05:56:56,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 323 transitions, 3650 flow [2023-11-29 05:56:57,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 323 transitions, 3544 flow, removed 47 selfloop flow, removed 7 redundant places. [2023-11-29 05:56:57,550 INFO L231 Difference]: Finished difference. Result has 118 places, 154 transitions, 1937 flow [2023-11-29 05:56:57,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1937, PETRI_PLACES=118, PETRI_TRANSITIONS=154} [2023-11-29 05:56:57,550 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 79 predicate places. [2023-11-29 05:56:57,550 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 154 transitions, 1937 flow [2023-11-29 05:56:57,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.11111111111111) internal successors, (146), 18 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:57,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:56:57,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:57,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:56:57,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:57,751 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 05:56:57,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:57,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2114737404, now seen corresponding path program 1 times [2023-11-29 05:56:57,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:57,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115844341] [2023-11-29 05:56:57,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:57,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:56:57,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:57,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115844341] [2023-11-29 05:56:57,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115844341] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:57,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508635688] [2023-11-29 05:56:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:57,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:57,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:57,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:57,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:56:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:58,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:56:58,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:56:58,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:56:58,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508635688] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:56:58,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:56:58,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-29 05:56:58,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518881880] [2023-11-29 05:56:58,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:58,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 05:56:58,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:58,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 05:56:58,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:56:58,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:56:58,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 154 transitions, 1937 flow. Second operand has 19 states, 19 states have (on average 7.105263157894737) internal successors, (135), 19 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:58,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:56:58,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:56:58,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:04,129 INFO L124 PetriNetUnfolderBase]: 35695/49746 cut-off events. [2023-11-29 05:57:04,129 INFO L125 PetriNetUnfolderBase]: For 242233/242233 co-relation queries the response was YES. [2023-11-29 05:57:04,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169673 conditions, 49746 events. 35695/49746 cut-off events. For 242233/242233 co-relation queries the response was YES. Maximal size of possible extension queue 2143. Compared 312520 event pairs, 18768 based on Foata normal form. 8/42854 useless extension candidates. Maximal degree in co-relation 169629. Up to 16577 conditions per place. [2023-11-29 05:57:04,569 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 341 selfloop transitions, 41 changer transitions 4/387 dead transitions. [2023-11-29 05:57:04,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 387 transitions, 5512 flow [2023-11-29 05:57:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:57:04,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:57:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2023-11-29 05:57:04,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2023-11-29 05:57:04,570 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 167 transitions. [2023-11-29 05:57:04,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 167 transitions. [2023-11-29 05:57:04,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:04,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 167 transitions. [2023-11-29 05:57:04,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 16.7) internal successors, (167), 10 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:57:04,571 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 05:57:04,572 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 05:57:04,572 INFO L175 Difference]: Start difference. First operand has 118 places, 154 transitions, 1937 flow. Second operand 10 states and 167 transitions. [2023-11-29 05:57:04,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 387 transitions, 5512 flow [2023-11-29 05:57:07,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 387 transitions, 5375 flow, removed 50 selfloop flow, removed 3 redundant places. [2023-11-29 05:57:07,203 INFO L231 Difference]: Finished difference. Result has 128 places, 188 transitions, 2573 flow [2023-11-29 05:57:07,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2573, PETRI_PLACES=128, PETRI_TRANSITIONS=188} [2023-11-29 05:57:07,204 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 89 predicate places. [2023-11-29 05:57:07,204 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 188 transitions, 2573 flow [2023-11-29 05:57:07,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.105263157894737) internal successors, (135), 19 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:57:07,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:07,204 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 05:57:07,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:57:07,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 05:57:07,405 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 05:57:07,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:07,405 INFO L85 PathProgramCache]: Analyzing trace with hash -865721137, now seen corresponding path program 1 times [2023-11-29 05:57:07,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:57:07,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007363266] [2023-11-29 05:57:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:07,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:57:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:07,574 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 05:57:07,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:57:07,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007363266] [2023-11-29 05:57:07,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007363266] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:57:07,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823468585] [2023-11-29 05:57:07,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:07,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:57:07,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:57:07,575 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:57:07,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:57:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:07,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:57:07,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:07,848 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 05:57:07,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:57:07,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823468585] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:57:07,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:57:07,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-11-29 05:57:07,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422770438] [2023-11-29 05:57:07,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:57:07,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:57:07,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:57:07,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:57:07,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:57:07,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:57:07,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 188 transitions, 2573 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 05:57:07,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:07,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:57:07,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:14,859 INFO L124 PetriNetUnfolderBase]: 41917/58428 cut-off events. [2023-11-29 05:57:14,859 INFO L125 PetriNetUnfolderBase]: For 301684/301684 co-relation queries the response was YES. [2023-11-29 05:57:15,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198441 conditions, 58428 events. 41917/58428 cut-off events. For 301684/301684 co-relation queries the response was YES. Maximal size of possible extension queue 2262. Compared 368437 event pairs, 16098 based on Foata normal form. 0/50712 useless extension candidates. Maximal degree in co-relation 198393. Up to 31300 conditions per place. [2023-11-29 05:57:15,379 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 228 selfloop transitions, 40 changer transitions 0/269 dead transitions. [2023-11-29 05:57:15,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 269 transitions, 4160 flow [2023-11-29 05:57:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:57:15,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:57:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2023-11-29 05:57:15,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30272108843537415 [2023-11-29 05:57:15,380 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 89 transitions. [2023-11-29 05:57:15,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 89 transitions. [2023-11-29 05:57:15,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:15,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 89 transitions. [2023-11-29 05:57:15,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:57:15,381 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 05:57:15,381 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 05:57:15,381 INFO L175 Difference]: Start difference. First operand has 128 places, 188 transitions, 2573 flow. Second operand 7 states and 89 transitions. [2023-11-29 05:57:15,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 269 transitions, 4160 flow [2023-11-29 05:57:17,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 269 transitions, 4142 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-29 05:57:17,974 INFO L231 Difference]: Finished difference. Result has 132 places, 189 transitions, 2705 flow [2023-11-29 05:57:17,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2705, PETRI_PLACES=132, PETRI_TRANSITIONS=189} [2023-11-29 05:57:17,975 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 93 predicate places. [2023-11-29 05:57:17,975 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 189 transitions, 2705 flow [2023-11-29 05:57:17,975 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 05:57:17,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:17,975 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:57:17,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:57:18,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 05:57:18,177 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 05:57:18,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:18,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1325563042, now seen corresponding path program 1 times [2023-11-29 05:57:18,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:57:18,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517316266] [2023-11-29 05:57:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:18,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:57:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:57:18,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:57:18,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517316266] [2023-11-29 05:57:18,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517316266] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:57:18,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226294733] [2023-11-29 05:57:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:18,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:57:18,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:57:18,363 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:57:18,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:57:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:18,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:57:18,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:57:18,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:57:18,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226294733] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:57:18,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:57:18,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 05:57:18,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714812152] [2023-11-29 05:57:18,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:57:18,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:57:18,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:57:18,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:57:18,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:57:18,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:57:18,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 189 transitions, 2705 flow. Second operand has 20 states, 20 states have (on average 6.45) internal successors, (129), 20 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:57:18,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:18,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:57:18,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:57:32,802 INFO L124 PetriNetUnfolderBase]: 76846/107096 cut-off events. [2023-11-29 05:57:32,802 INFO L125 PetriNetUnfolderBase]: For 619965/619965 co-relation queries the response was YES. [2023-11-29 05:57:33,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394785 conditions, 107096 events. 76846/107096 cut-off events. For 619965/619965 co-relation queries the response was YES. Maximal size of possible extension queue 3876. Compared 731620 event pairs, 33797 based on Foata normal form. 8/97468 useless extension candidates. Maximal degree in co-relation 394735. Up to 37199 conditions per place. [2023-11-29 05:57:33,836 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 624 selfloop transitions, 84 changer transitions 27/736 dead transitions. [2023-11-29 05:57:33,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 736 transitions, 10727 flow [2023-11-29 05:57:33,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:57:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 05:57:33,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 380 transitions. [2023-11-29 05:57:33,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39337474120082816 [2023-11-29 05:57:33,838 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 380 transitions. [2023-11-29 05:57:33,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 380 transitions. [2023-11-29 05:57:33,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:57:33,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 380 transitions. [2023-11-29 05:57:33,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 16.52173913043478) internal successors, (380), 23 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:57:33,841 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 05:57:33,841 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 05:57:33,841 INFO L175 Difference]: Start difference. First operand has 132 places, 189 transitions, 2705 flow. Second operand 23 states and 380 transitions. [2023-11-29 05:57:33,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 736 transitions, 10727 flow [2023-11-29 05:57:43,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 736 transitions, 10591 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 05:57:43,363 INFO L231 Difference]: Finished difference. Result has 159 places, 254 transitions, 3796 flow [2023-11-29 05:57:43,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2659, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3796, PETRI_PLACES=159, PETRI_TRANSITIONS=254} [2023-11-29 05:57:43,364 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 120 predicate places. [2023-11-29 05:57:43,364 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 254 transitions, 3796 flow [2023-11-29 05:57:43,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.45) internal successors, (129), 20 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:57:43,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:57:43,364 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 05:57:43,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:57:43,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 05:57:43,565 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 05:57:43,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:43,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1943393763, now seen corresponding path program 1 times [2023-11-29 05:57:43,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:57:43,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940080544] [2023-11-29 05:57:43,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:43,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:57:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:44,605 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 05:57:44,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:57:44,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940080544] [2023-11-29 05:57:44,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940080544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:57:44,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034525946] [2023-11-29 05:57:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:44,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:57:44,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:57:44,607 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:57:44,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:57:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:44,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 05:57:44,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:44,838 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 05:57:45,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:57:45,073 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 40 treesize of output 40 [2023-11-29 05:57:45,113 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 05:57:45,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:45,565 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 05:57:45,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034525946] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:57:45,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:57:45,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 12] total 20 [2023-11-29 05:57:45,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78296844] [2023-11-29 05:57:45,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:57:45,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:57:45,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:57:45,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:57:45,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:57:45,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:57:45,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 254 transitions, 3796 flow. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:57:45,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:57:45,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:57:45,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:58:27,170 INFO L124 PetriNetUnfolderBase]: 200816/281935 cut-off events. [2023-11-29 05:58:27,170 INFO L125 PetriNetUnfolderBase]: For 1533523/1533523 co-relation queries the response was YES. [2023-11-29 05:58:29,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010434 conditions, 281935 events. 200816/281935 cut-off events. For 1533523/1533523 co-relation queries the response was YES. Maximal size of possible extension queue 10156. Compared 2200887 event pairs, 57088 based on Foata normal form. 11/256668 useless extension candidates. Maximal degree in co-relation 1010374. Up to 112191 conditions per place. [2023-11-29 05:58:30,693 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 523 selfloop transitions, 91 changer transitions 14/629 dead transitions. [2023-11-29 05:58:30,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 629 transitions, 10081 flow [2023-11-29 05:58:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:58:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:58:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2023-11-29 05:58:30,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2023-11-29 05:58:30,694 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 199 transitions. [2023-11-29 05:58:30,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 199 transitions. [2023-11-29 05:58:30,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:58:30,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 199 transitions. [2023-11-29 05:58:30,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 19.9) internal successors, (199), 10 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:58:30,695 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 05:58:30,695 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 05:58:30,695 INFO L175 Difference]: Start difference. First operand has 159 places, 254 transitions, 3796 flow. Second operand 10 states and 199 transitions. [2023-11-29 05:58:30,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 629 transitions, 10081 flow [2023-11-29 05:59:36,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 629 transitions, 10014 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-11-29 05:59:36,857 INFO L231 Difference]: Finished difference. Result has 169 places, 306 transitions, 5013 flow [2023-11-29 05:59:36,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3729, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5013, PETRI_PLACES=169, PETRI_TRANSITIONS=306} [2023-11-29 05:59:36,858 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 130 predicate places. [2023-11-29 05:59:36,858 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 306 transitions, 5013 flow [2023-11-29 05:59:36,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:59:36,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:59:36,859 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 05:59:36,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:59:37,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b1ceba-d854-4638-97c4-0580ef7b4862/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 05:59:37,059 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 05:59:37,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:59:37,060 INFO L85 PathProgramCache]: Analyzing trace with hash 739417985, now seen corresponding path program 2 times [2023-11-29 05:59:37,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:59:37,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562329920] [2023-11-29 05:59:37,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:59:37,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:59:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:59:37,610 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 05:59:37,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:59:37,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562329920] [2023-11-29 05:59:37,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562329920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:59:37,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:59:37,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 05:59:37,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014514647] [2023-11-29 05:59:37,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:59:37,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:59:37,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:59:37,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:59:37,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:59:37,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-29 05:59:37,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 306 transitions, 5013 flow. Second operand has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:59:37,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:59:37,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-29 05:59:37,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand