./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/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_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/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_4c91232b-66ed-41e9-83b7-94885334aa9a/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 faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:20:42,123 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:20:42,187 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:20:42,191 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:20:42,192 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:20:42,214 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:20:42,215 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:20:42,215 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:20:42,216 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:20:42,217 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:20:42,217 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:20:42,218 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:20:42,218 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:20:42,219 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:20:42,219 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:20:42,220 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:20:42,220 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:20:42,221 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:20:42,221 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:20:42,222 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:20:42,222 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:20:42,223 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:20:42,223 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:20:42,223 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:20:42,224 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:20:42,224 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:20:42,224 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:20:42,225 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:20:42,225 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:20:42,226 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:20:42,226 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:20:42,226 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:20:42,226 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:20:42,227 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:20:42,227 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:20:42,227 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:20:42,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:20:42,227 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:20:42,228 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:20:42,228 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:20:42,228 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:20:42,228 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:20:42,228 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_4c91232b-66ed-41e9-83b7-94885334aa9a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2023-11-29 04:20:42,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:20:42,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:20:42,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:20:42,497 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:20:42,497 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:20:42,499 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-29 04:20:45,248 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:20:45,446 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:20:45,446 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-29 04:20:45,453 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/data/278c1075d/590c86acbf6148b3b01550ea43fe6c4d/FLAG617236d4a [2023-11-29 04:20:45,464 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/data/278c1075d/590c86acbf6148b3b01550ea43fe6c4d [2023-11-29 04:20:45,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:20:45,469 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:20:45,470 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:20:45,470 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:20:45,475 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:20:45,476 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:20:45" (1/1) ... [2023-11-29 04:20:45,477 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29d57e55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:45, skipping insertion in model container [2023-11-29 04:20:45,477 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:20:45" (1/1) ... [2023-11-29 04:20:45,503 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:20:45,676 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_4c91232b-66ed-41e9-83b7-94885334aa9a/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2781,2794] [2023-11-29 04:20:45,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:20:45,699 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:20:45,721 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_4c91232b-66ed-41e9-83b7-94885334aa9a/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2781,2794] [2023-11-29 04:20:45,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:20:45,739 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:20:45,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:45 WrapperNode [2023-11-29 04:20:45,740 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:20:45,741 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:20:45,741 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:20:45,741 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:20:45,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:45" (1/1) ... [2023-11-29 04:20:45,754 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:45" (1/1) ... [2023-11-29 04:20:45,780 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 289 [2023-11-29 04:20:45,780 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:20:45,781 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:20:45,781 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:20:45,781 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:20:45,792 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:45" (1/1) ... [2023-11-29 04:20:45,793 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:45" (1/1) ... [2023-11-29 04:20:45,797 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:45" (1/1) ... [2023-11-29 04:20:45,816 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 7, 2, 2]. 54 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 04:20:45,816 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:45" (1/1) ... [2023-11-29 04:20:45,817 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:45" (1/1) ... [2023-11-29 04:20:45,828 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:45" (1/1) ... [2023-11-29 04:20:45,833 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:45" (1/1) ... [2023-11-29 04:20:45,836 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:45" (1/1) ... [2023-11-29 04:20:45,838 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:45" (1/1) ... [2023-11-29 04:20:45,843 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:20:45,844 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:20:45,844 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:20:45,844 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:20:45,845 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:45" (1/1) ... [2023-11-29 04:20:45,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:20:45,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:20:45,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:20:45,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:20:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:20:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 04:20:45,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 04:20:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 04:20:45,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 04:20:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:20:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:20:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 04:20:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 04:20:45,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:20:45,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:20:45,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:20:45,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 04:20:45,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 04:20:45,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 04:20:45,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:20:45,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:20:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:20:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:20:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 04:20:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 04:20:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:20:45,923 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 04:20:46,039 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:20:46,041 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:20:46,441 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:20:46,971 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:20:46,971 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 04:20:46,971 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:20:46 BoogieIcfgContainer [2023-11-29 04:20:46,972 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:20:46,974 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:20:46,974 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:20:46,977 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:20:46,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:20:45" (1/3) ... [2023-11-29 04:20:46,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d42b3c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:20:46, skipping insertion in model container [2023-11-29 04:20:46,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:45" (2/3) ... [2023-11-29 04:20:46,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d42b3c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:20:46, skipping insertion in model container [2023-11-29 04:20:46,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:20:46" (3/3) ... [2023-11-29 04:20:46,980 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2023-11-29 04:20:46,989 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 04:20:46,999 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:20:46,999 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:20:46,999 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 04:20:47,043 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 04:20:47,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2023-11-29 04:20:47,112 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-29 04:20:47,112 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 04:20:47,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-29 04:20:47,115 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2023-11-29 04:20:47,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2023-11-29 04:20:47,128 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:20:47,135 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;@11f7de58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:20:47,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 04:20:47,145 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 04:20:47,145 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-29 04:20:47,145 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 04:20:47,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:20:47,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:47,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:20:47,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:47,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1642167946, now seen corresponding path program 1 times [2023-11-29 04:20:47,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:47,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256749370] [2023-11-29 04:20:47,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:47,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:47,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:47,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256749370] [2023-11-29 04:20:47,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256749370] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:47,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:47,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:20:47,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479172877] [2023-11-29 04:20:47,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:47,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:20:47,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:47,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:20:47,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:20:47,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:20:47,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:47,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:20:47,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:20:47,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:20:47,825 INFO L124 PetriNetUnfolderBase]: 101/166 cut-off events. [2023-11-29 04:20:47,825 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-29 04:20:47,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 166 events. 101/166 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 481 event pairs, 9 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 267. Up to 111 conditions per place. [2023-11-29 04:20:47,829 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 28 selfloop transitions, 10 changer transitions 1/42 dead transitions. [2023-11-29 04:20:47,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 42 transitions, 189 flow [2023-11-29 04:20:47,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:20:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:20:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2023-11-29 04:20:47,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2023-11-29 04:20:47,842 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 65 transitions. [2023-11-29 04:20:47,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 65 transitions. [2023-11-29 04:20:47,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:20:47,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 65 transitions. [2023-11-29 04:20:47,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:47,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:47,852 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:47,854 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 5 states and 65 transitions. [2023-11-29 04:20:47,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 42 transitions, 189 flow [2023-11-29 04:20:47,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 42 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 04:20:47,860 INFO L231 Difference]: Finished difference. Result has 25 places, 27 transitions, 103 flow [2023-11-29 04:20:47,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=25, PETRI_TRANSITIONS=27} [2023-11-29 04:20:47,866 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-11-29 04:20:47,866 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 103 flow [2023-11-29 04:20:47,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:47,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:20:47,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:47,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:20:47,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:20:47,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:47,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1394700661, now seen corresponding path program 1 times [2023-11-29 04:20:47,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:47,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824138558] [2023-11-29 04:20:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:47,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:48,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:48,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824138558] [2023-11-29 04:20:48,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824138558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:48,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:48,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:20:48,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175400438] [2023-11-29 04:20:48,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:48,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:20:48,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:48,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:20:48,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:20:48,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:20:48,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:48,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:20:48,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:20:48,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:20:48,160 INFO L124 PetriNetUnfolderBase]: 131/226 cut-off events. [2023-11-29 04:20:48,160 INFO L125 PetriNetUnfolderBase]: For 191/191 co-relation queries the response was YES. [2023-11-29 04:20:48,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 226 events. 131/226 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 777 event pairs, 43 based on Foata normal form. 12/216 useless extension candidates. Maximal degree in co-relation 386. Up to 117 conditions per place. [2023-11-29 04:20:48,163 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 33 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2023-11-29 04:20:48,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 42 transitions, 238 flow [2023-11-29 04:20:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:20:48,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:20:48,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2023-11-29 04:20:48,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2023-11-29 04:20:48,165 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 47 transitions. [2023-11-29 04:20:48,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 47 transitions. [2023-11-29 04:20:48,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:20:48,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 47 transitions. [2023-11-29 04:20:48,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:48,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:48,168 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:48,168 INFO L175 Difference]: Start difference. First operand has 25 places, 27 transitions, 103 flow. Second operand 4 states and 47 transitions. [2023-11-29 04:20:48,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 42 transitions, 238 flow [2023-11-29 04:20:48,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 232 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-29 04:20:48,172 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 155 flow [2023-11-29 04:20:48,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2023-11-29 04:20:48,173 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2023-11-29 04:20:48,173 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 155 flow [2023-11-29 04:20:48,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:48,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:20:48,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:48,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:20:48,174 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:20:48,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:48,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1626431928, now seen corresponding path program 1 times [2023-11-29 04:20:48,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:48,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387231112] [2023-11-29 04:20:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:48,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:48,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:48,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387231112] [2023-11-29 04:20:48,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387231112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:48,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:48,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:20:48,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589711106] [2023-11-29 04:20:48,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:48,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:20:48,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:48,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:20:48,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:20:48,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:20:48,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:48,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:20:48,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:20:48,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:20:48,419 INFO L124 PetriNetUnfolderBase]: 105/187 cut-off events. [2023-11-29 04:20:48,419 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2023-11-29 04:20:48,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 187 events. 105/187 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 614 event pairs, 30 based on Foata normal form. 5/191 useless extension candidates. Maximal degree in co-relation 547. Up to 104 conditions per place. [2023-11-29 04:20:48,422 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 29 selfloop transitions, 4 changer transitions 4/40 dead transitions. [2023-11-29 04:20:48,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 40 transitions, 272 flow [2023-11-29 04:20:48,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:20:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:20:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2023-11-29 04:20:48,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2023-11-29 04:20:48,424 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2023-11-29 04:20:48,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2023-11-29 04:20:48,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:20:48,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2023-11-29 04:20:48,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:48,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:48,426 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:48,426 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 155 flow. Second operand 4 states and 45 transitions. [2023-11-29 04:20:48,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 40 transitions, 272 flow [2023-11-29 04:20:48,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 268 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-29 04:20:48,430 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 141 flow [2023-11-29 04:20:48,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2023-11-29 04:20:48,431 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-11-29 04:20:48,431 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 141 flow [2023-11-29 04:20:48,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:48,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:20:48,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:48,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 04:20:48,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:20:48,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:48,433 INFO L85 PathProgramCache]: Analyzing trace with hash -900029099, now seen corresponding path program 1 times [2023-11-29 04:20:48,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:48,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521181553] [2023-11-29 04:20:48,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:48,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:20:48,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:48,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521181553] [2023-11-29 04:20:48,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521181553] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:20:48,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796272728] [2023-11-29 04:20:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:48,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:48,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:20:48,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:20:48,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:20:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:48,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:20:48,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:20:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:20:48,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:20:48,864 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 04:20:48,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796272728] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:20:48,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:20:48,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-29 04:20:48,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94119218] [2023-11-29 04:20:48,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:48,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:20:48,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:48,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:20:48,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:20:48,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:20:48,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:48,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:20:48,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:20:48,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:20:48,955 INFO L124 PetriNetUnfolderBase]: 82/140 cut-off events. [2023-11-29 04:20:48,955 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2023-11-29 04:20:48,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 140 events. 82/140 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 379 event pairs, 12 based on Foata normal form. 14/152 useless extension candidates. Maximal degree in co-relation 490. Up to 89 conditions per place. [2023-11-29 04:20:48,957 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 28 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2023-11-29 04:20:48,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 251 flow [2023-11-29 04:20:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:20:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:20:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2023-11-29 04:20:48,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2023-11-29 04:20:48,959 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 48 transitions. [2023-11-29 04:20:48,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 48 transitions. [2023-11-29 04:20:48,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:20:48,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 48 transitions. [2023-11-29 04:20:48,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 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 04:20:48,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:48,961 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:48,961 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 141 flow. Second operand 5 states and 48 transitions. [2023-11-29 04:20:48,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 251 flow [2023-11-29 04:20:48,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 209 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-29 04:20:48,965 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 140 flow [2023-11-29 04:20:48,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-11-29 04:20:48,966 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2023-11-29 04:20:48,966 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 140 flow [2023-11-29 04:20:48,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:48,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:20:48,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:48,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:20:49,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:49,172 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:20:49,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:49,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1162304328, now seen corresponding path program 1 times [2023-11-29 04:20:49,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:49,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324246338] [2023-11-29 04:20:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:49,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:20:49,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:49,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324246338] [2023-11-29 04:20:49,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324246338] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:20:49,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212325518] [2023-11-29 04:20:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:49,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:49,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:20:49,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:20:49,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:20:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:49,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:20:49,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:20:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:20:49,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:20:49,515 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 04:20:49,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212325518] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:20:49,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:20:49,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-29 04:20:49,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918741860] [2023-11-29 04:20:49,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:49,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:20:49,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:49,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:20:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:20:49,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:20:49,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:49,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:20:49,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:20:49,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:20:49,597 INFO L124 PetriNetUnfolderBase]: 62/108 cut-off events. [2023-11-29 04:20:49,597 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-29 04:20:49,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 108 events. 62/108 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 231 event pairs, 7 based on Foata normal form. 9/114 useless extension candidates. Maximal degree in co-relation 372. Up to 86 conditions per place. [2023-11-29 04:20:49,599 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 27 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2023-11-29 04:20:49,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 232 flow [2023-11-29 04:20:49,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:20:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:20:49,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2023-11-29 04:20:49,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2023-11-29 04:20:49,601 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 48 transitions. [2023-11-29 04:20:49,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 48 transitions. [2023-11-29 04:20:49,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:20:49,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 48 transitions. [2023-11-29 04:20:49,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 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 04:20:49,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:49,603 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:49,603 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 140 flow. Second operand 5 states and 48 transitions. [2023-11-29 04:20:49,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 232 flow [2023-11-29 04:20:49,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 229 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 04:20:49,605 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 161 flow [2023-11-29 04:20:49,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-29 04:20:49,606 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2023-11-29 04:20:49,606 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 161 flow [2023-11-29 04:20:49,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:49,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:20:49,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:49,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:20:49,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:49,812 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:20:49,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:49,812 INFO L85 PathProgramCache]: Analyzing trace with hash 356427372, now seen corresponding path program 1 times [2023-11-29 04:20:49,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:49,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204491103] [2023-11-29 04:20:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:49,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:50,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:50,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204491103] [2023-11-29 04:20:50,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204491103] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:20:50,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51010934] [2023-11-29 04:20:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:50,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:50,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:20:50,876 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:20:50,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:20:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:50,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 04:20:50,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:20:51,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:20:51,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 59 [2023-11-29 04:20:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:51,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:20:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:20:52,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51010934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:20:52,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:20:52,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 04:20:52,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400029603] [2023-11-29 04:20:52,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:20:52,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:20:52,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:52,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:20:52,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:20:52,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:20:52,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 161 flow. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:52,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:20:52,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:20:52,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:20:52,817 INFO L124 PetriNetUnfolderBase]: 96/177 cut-off events. [2023-11-29 04:20:52,817 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2023-11-29 04:20:52,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 177 events. 96/177 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 496 event pairs, 0 based on Foata normal form. 1/175 useless extension candidates. Maximal degree in co-relation 533. Up to 100 conditions per place. [2023-11-29 04:20:52,820 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 46 selfloop transitions, 25 changer transitions 4/78 dead transitions. [2023-11-29 04:20:52,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 78 transitions, 498 flow [2023-11-29 04:20:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:20:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 04:20:52,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 127 transitions. [2023-11-29 04:20:52,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2023-11-29 04:20:52,822 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 127 transitions. [2023-11-29 04:20:52,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 127 transitions. [2023-11-29 04:20:52,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:20:52,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 127 transitions. [2023-11-29 04:20:52,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:52,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:52,825 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:52,825 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 161 flow. Second operand 12 states and 127 transitions. [2023-11-29 04:20:52,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 78 transitions, 498 flow [2023-11-29 04:20:52,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 78 transitions, 495 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 04:20:52,829 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 351 flow [2023-11-29 04:20:52,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=351, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-11-29 04:20:52,830 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 26 predicate places. [2023-11-29 04:20:52,830 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 351 flow [2023-11-29 04:20:52,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:52,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:20:52,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:52,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:20:53,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:53,036 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:20:53,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:53,036 INFO L85 PathProgramCache]: Analyzing trace with hash -746252018, now seen corresponding path program 2 times [2023-11-29 04:20:53,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:53,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603592271] [2023-11-29 04:20:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:53,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:54,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:54,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603592271] [2023-11-29 04:20:54,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603592271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:20:54,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259729352] [2023-11-29 04:20:54,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:20:54,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:54,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:20:54,079 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:20:54,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:20:54,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:20:54,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:20:54,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 04:20:54,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:20:54,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:20:54,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 59 [2023-11-29 04:20:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:54,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:20:55,418 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 04:20:55,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259729352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:20:55,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:20:55,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2023-11-29 04:20:55,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023459066] [2023-11-29 04:20:55,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:20:55,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:20:55,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:55,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:20:55,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:20:55,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:20:55,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 351 flow. Second operand has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:55,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:20:55,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:20:55,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:20:55,712 INFO L124 PetriNetUnfolderBase]: 95/178 cut-off events. [2023-11-29 04:20:55,712 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2023-11-29 04:20:55,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 178 events. 95/178 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 502 event pairs, 4 based on Foata normal form. 1/176 useless extension candidates. Maximal degree in co-relation 663. Up to 126 conditions per place. [2023-11-29 04:20:55,714 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 35 selfloop transitions, 27 changer transitions 4/69 dead transitions. [2023-11-29 04:20:55,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 547 flow [2023-11-29 04:20:55,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:20:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 04:20:55,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 122 transitions. [2023-11-29 04:20:55,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2023-11-29 04:20:55,716 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 122 transitions. [2023-11-29 04:20:55,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 122 transitions. [2023-11-29 04:20:55,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:20:55,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 122 transitions. [2023-11-29 04:20:55,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 10.166666666666666) internal successors, (122), 12 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:55,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:55,719 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:55,719 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 351 flow. Second operand 12 states and 122 transitions. [2023-11-29 04:20:55,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 547 flow [2023-11-29 04:20:55,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 509 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-29 04:20:55,724 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 388 flow [2023-11-29 04:20:55,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=388, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2023-11-29 04:20:55,725 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 37 predicate places. [2023-11-29 04:20:55,725 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 388 flow [2023-11-29 04:20:55,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:55,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:20:55,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:55,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:20:55,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:55,931 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:20:55,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:55,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2076686380, now seen corresponding path program 3 times [2023-11-29 04:20:55,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:55,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112664101] [2023-11-29 04:20:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:55,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:56,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:56,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112664101] [2023-11-29 04:20:56,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112664101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:20:56,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262574645] [2023-11-29 04:20:56,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:20:56,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:56,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:20:56,555 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:20:56,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:20:56,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:20:56,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:20:56,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 04:20:56,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:20:56,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:20:56,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 59 [2023-11-29 04:20:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:56,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:20:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:20:57,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262574645] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:20:57,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:20:57,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2023-11-29 04:20:57,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614759103] [2023-11-29 04:20:57,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:20:57,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:20:57,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:57,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:20:57,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:20:57,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:20:57,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 388 flow. Second operand has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:57,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:20:57,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:20:57,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:20:58,054 INFO L124 PetriNetUnfolderBase]: 100/187 cut-off events. [2023-11-29 04:20:58,054 INFO L125 PetriNetUnfolderBase]: For 478/478 co-relation queries the response was YES. [2023-11-29 04:20:58,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 187 events. 100/187 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 552 event pairs, 2 based on Foata normal form. 1/185 useless extension candidates. Maximal degree in co-relation 766. Up to 134 conditions per place. [2023-11-29 04:20:58,057 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 41 selfloop transitions, 23 changer transitions 4/71 dead transitions. [2023-11-29 04:20:58,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 593 flow [2023-11-29 04:20:58,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 04:20:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 04:20:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2023-11-29 04:20:58,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2023-11-29 04:20:58,059 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 114 transitions. [2023-11-29 04:20:58,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 114 transitions. [2023-11-29 04:20:58,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:20:58,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 114 transitions. [2023-11-29 04:20:58,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:58,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:58,061 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:58,061 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 388 flow. Second operand 11 states and 114 transitions. [2023-11-29 04:20:58,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 593 flow [2023-11-29 04:20:58,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 503 flow, removed 16 selfloop flow, removed 11 redundant places. [2023-11-29 04:20:58,066 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 365 flow [2023-11-29 04:20:58,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=365, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-11-29 04:20:58,066 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 38 predicate places. [2023-11-29 04:20:58,067 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 365 flow [2023-11-29 04:20:58,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:58,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:20:58,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:58,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:20:58,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:58,268 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:20:58,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash -880842868, now seen corresponding path program 4 times [2023-11-29 04:20:58,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:58,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678971837] [2023-11-29 04:20:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:58,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:58,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:58,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678971837] [2023-11-29 04:20:58,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678971837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:20:58,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497720164] [2023-11-29 04:20:58,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:20:58,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:58,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:20:58,903 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:20:58,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:20:59,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:20:59,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:20:59,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 04:20:59,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:20:59,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 04:20:59,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2023-11-29 04:20:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:59,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:21:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:21:00,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497720164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:21:00,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:21:00,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-29 04:21:00,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884869058] [2023-11-29 04:21:00,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:21:00,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 04:21:00,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:00,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 04:21:00,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:21:00,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:21:00,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 365 flow. Second operand has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:00,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:21:00,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:21:00,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:21:01,621 INFO L124 PetriNetUnfolderBase]: 196/346 cut-off events. [2023-11-29 04:21:01,621 INFO L125 PetriNetUnfolderBase]: For 970/970 co-relation queries the response was YES. [2023-11-29 04:21:01,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767 conditions, 346 events. 196/346 cut-off events. For 970/970 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1226 event pairs, 2 based on Foata normal form. 1/338 useless extension candidates. Maximal degree in co-relation 1408. Up to 131 conditions per place. [2023-11-29 04:21:01,625 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 60 selfloop transitions, 70 changer transitions 2/135 dead transitions. [2023-11-29 04:21:01,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 135 transitions, 1144 flow [2023-11-29 04:21:01,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 04:21:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 04:21:01,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 204 transitions. [2023-11-29 04:21:01,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-11-29 04:21:01,627 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 204 transitions. [2023-11-29 04:21:01,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 204 transitions. [2023-11-29 04:21:01,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:21:01,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 204 transitions. [2023-11-29 04:21:01,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 10.2) internal successors, (204), 20 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:01,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 21.0) internal successors, (441), 21 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:01,629 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 21.0) internal successors, (441), 21 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:01,630 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 365 flow. Second operand 20 states and 204 transitions. [2023-11-29 04:21:01,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 135 transitions, 1144 flow [2023-11-29 04:21:01,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 135 transitions, 1087 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-11-29 04:21:01,638 INFO L231 Difference]: Finished difference. Result has 72 places, 92 transitions, 907 flow [2023-11-29 04:21:01,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=907, PETRI_PLACES=72, PETRI_TRANSITIONS=92} [2023-11-29 04:21:01,639 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 50 predicate places. [2023-11-29 04:21:01,639 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 92 transitions, 907 flow [2023-11-29 04:21:01,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:01,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:21:01,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:21:01,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:21:01,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 04:21:01,844 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:21:01,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:01,844 INFO L85 PathProgramCache]: Analyzing trace with hash -366575394, now seen corresponding path program 5 times [2023-11-29 04:21:01,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:01,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000197370] [2023-11-29 04:21:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:01,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:02,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:02,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000197370] [2023-11-29 04:21:02,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000197370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:21:02,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829502341] [2023-11-29 04:21:02,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:21:02,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:02,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:21:02,493 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:21:02,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:21:02,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 04:21:02,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:21:02,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 04:21:02,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:21:02,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 04:21:02,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2023-11-29 04:21:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:02,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:21:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:21:04,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829502341] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:21:04,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:21:04,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-29 04:21:04,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720884340] [2023-11-29 04:21:04,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:21:04,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:21:04,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:04,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:21:04,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:21:04,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:21:04,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 92 transitions, 907 flow. Second operand has 19 states, 19 states have (on average 7.157894736842105) internal successors, (136), 19 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 04:21:04,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:21:04,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:21:04,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:21:05,071 INFO L124 PetriNetUnfolderBase]: 230/414 cut-off events. [2023-11-29 04:21:05,072 INFO L125 PetriNetUnfolderBase]: For 1601/1601 co-relation queries the response was YES. [2023-11-29 04:21:05,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2394 conditions, 414 events. 230/414 cut-off events. For 1601/1601 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1581 event pairs, 0 based on Foata normal form. 1/408 useless extension candidates. Maximal degree in co-relation 1768. Up to 213 conditions per place. [2023-11-29 04:21:05,077 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 74 selfloop transitions, 70 changer transitions 5/152 dead transitions. [2023-11-29 04:21:05,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 152 transitions, 1505 flow [2023-11-29 04:21:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 04:21:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 04:21:05,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 225 transitions. [2023-11-29 04:21:05,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658385093167702 [2023-11-29 04:21:05,079 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 225 transitions. [2023-11-29 04:21:05,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 225 transitions. [2023-11-29 04:21:05,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:21:05,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 225 transitions. [2023-11-29 04:21:05,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 9.782608695652174) internal successors, (225), 23 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:05,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 21.0) internal successors, (504), 24 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:05,082 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 21.0) internal successors, (504), 24 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:05,082 INFO L175 Difference]: Start difference. First operand has 72 places, 92 transitions, 907 flow. Second operand 23 states and 225 transitions. [2023-11-29 04:21:05,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 152 transitions, 1505 flow [2023-11-29 04:21:05,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 152 transitions, 1244 flow, removed 119 selfloop flow, removed 6 redundant places. [2023-11-29 04:21:05,093 INFO L231 Difference]: Finished difference. Result has 92 places, 105 transitions, 1004 flow [2023-11-29 04:21:05,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1004, PETRI_PLACES=92, PETRI_TRANSITIONS=105} [2023-11-29 04:21:05,094 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2023-11-29 04:21:05,094 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 105 transitions, 1004 flow [2023-11-29 04:21:05,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.157894736842105) internal successors, (136), 19 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 04:21:05,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:21:05,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:21:05,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:21:05,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:21:05,295 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:21:05,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:05,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2057220366, now seen corresponding path program 6 times [2023-11-29 04:21:05,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:05,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022286644] [2023-11-29 04:21:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:05,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:05,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:05,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022286644] [2023-11-29 04:21:05,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022286644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:21:05,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784547827] [2023-11-29 04:21:05,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:21:05,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:05,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:21:05,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:21:05,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:21:06,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 04:21:06,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:21:06,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 04:21:06,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:21:06,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:21:06,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2023-11-29 04:21:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:06,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:21:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:21:07,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784547827] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:21:07,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:21:07,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2023-11-29 04:21:07,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818253977] [2023-11-29 04:21:07,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:21:07,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:21:07,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:07,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:21:07,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:21:07,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:21:07,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 105 transitions, 1004 flow. Second operand has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:07,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:21:07,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:21:07,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:21:07,458 INFO L124 PetriNetUnfolderBase]: 228/416 cut-off events. [2023-11-29 04:21:07,458 INFO L125 PetriNetUnfolderBase]: For 1214/1214 co-relation queries the response was YES. [2023-11-29 04:21:07,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 416 events. 228/416 cut-off events. For 1214/1214 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1609 event pairs, 12 based on Foata normal form. 1/398 useless extension candidates. Maximal degree in co-relation 2195. Up to 358 conditions per place. [2023-11-29 04:21:07,464 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 87 selfloop transitions, 31 changer transitions 5/126 dead transitions. [2023-11-29 04:21:07,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 126 transitions, 1328 flow [2023-11-29 04:21:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 04:21:07,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 04:21:07,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2023-11-29 04:21:07,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-29 04:21:07,466 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 110 transitions. [2023-11-29 04:21:07,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 110 transitions. [2023-11-29 04:21:07,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:21:07,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 110 transitions. [2023-11-29 04:21:07,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 10.0) internal successors, (110), 11 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 04:21:07,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:07,468 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 21.0) internal successors, (252), 12 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:07,468 INFO L175 Difference]: Start difference. First operand has 92 places, 105 transitions, 1004 flow. Second operand 11 states and 110 transitions. [2023-11-29 04:21:07,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 126 transitions, 1328 flow [2023-11-29 04:21:07,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 126 transitions, 1128 flow, removed 35 selfloop flow, removed 18 redundant places. [2023-11-29 04:21:07,480 INFO L231 Difference]: Finished difference. Result has 86 places, 107 transitions, 906 flow [2023-11-29 04:21:07,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=906, PETRI_PLACES=86, PETRI_TRANSITIONS=107} [2023-11-29 04:21:07,481 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 64 predicate places. [2023-11-29 04:21:07,481 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 107 transitions, 906 flow [2023-11-29 04:21:07,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:07,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:21:07,482 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:21:07,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:21:07,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:07,683 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:21:07,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:07,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1239704749, now seen corresponding path program 7 times [2023-11-29 04:21:07,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:07,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350182440] [2023-11-29 04:21:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:07,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:07,792 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 04:21:07,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:07,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350182440] [2023-11-29 04:21:07,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350182440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:21:07,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871067672] [2023-11-29 04:21:07,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:21:07,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:07,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:21:07,793 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:21:07,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:21:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:07,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:21:07,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:21:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:21:07,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:21:08,028 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 04:21:08,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871067672] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:21:08,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:21:08,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 04:21:08,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179392380] [2023-11-29 04:21:08,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:21:08,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 04:21:08,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:08,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 04:21:08,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:21:08,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:21:08,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 107 transitions, 906 flow. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:08,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:21:08,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:21:08,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:21:08,232 INFO L124 PetriNetUnfolderBase]: 216/448 cut-off events. [2023-11-29 04:21:08,232 INFO L125 PetriNetUnfolderBase]: For 1460/1460 co-relation queries the response was YES. [2023-11-29 04:21:08,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2163 conditions, 448 events. 216/448 cut-off events. For 1460/1460 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2052 event pairs, 59 based on Foata normal form. 32/469 useless extension candidates. Maximal degree in co-relation 2001. Up to 179 conditions per place. [2023-11-29 04:21:08,238 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 94 selfloop transitions, 19 changer transitions 5/121 dead transitions. [2023-11-29 04:21:08,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 121 transitions, 1240 flow [2023-11-29 04:21:08,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:21:08,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:21:08,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2023-11-29 04:21:08,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2023-11-29 04:21:08,239 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 76 transitions. [2023-11-29 04:21:08,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 76 transitions. [2023-11-29 04:21:08,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:21:08,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 76 transitions. [2023-11-29 04:21:08,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:08,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:08,240 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:08,240 INFO L175 Difference]: Start difference. First operand has 86 places, 107 transitions, 906 flow. Second operand 7 states and 76 transitions. [2023-11-29 04:21:08,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 121 transitions, 1240 flow [2023-11-29 04:21:08,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 1140 flow, removed 7 selfloop flow, removed 11 redundant places. [2023-11-29 04:21:08,251 INFO L231 Difference]: Finished difference. Result has 82 places, 93 transitions, 798 flow [2023-11-29 04:21:08,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=798, PETRI_PLACES=82, PETRI_TRANSITIONS=93} [2023-11-29 04:21:08,252 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 60 predicate places. [2023-11-29 04:21:08,252 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 93 transitions, 798 flow [2023-11-29 04:21:08,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:08,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:21:08,253 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:21:08,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 04:21:08,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 04:21:08,458 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:21:08,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:08,459 INFO L85 PathProgramCache]: Analyzing trace with hash 498835016, now seen corresponding path program 8 times [2023-11-29 04:21:08,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:08,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357905160] [2023-11-29 04:21:08,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:08,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:08,553 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 04:21:08,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:08,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357905160] [2023-11-29 04:21:08,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357905160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:21:08,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288768588] [2023-11-29 04:21:08,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:21:08,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:08,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:21:08,555 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:21:08,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:21:08,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:21:08,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:21:08,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:21:08,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:21:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:21:08,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:21:08,799 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 04:21:08,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288768588] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:21:08,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:21:08,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 04:21:08,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434082615] [2023-11-29 04:21:08,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:21:08,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 04:21:08,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:08,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 04:21:08,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:21:08,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:21:08,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 93 transitions, 798 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:08,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:21:08,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:21:08,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:21:08,975 INFO L124 PetriNetUnfolderBase]: 145/297 cut-off events. [2023-11-29 04:21:08,976 INFO L125 PetriNetUnfolderBase]: For 1051/1051 co-relation queries the response was YES. [2023-11-29 04:21:08,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1435 conditions, 297 events. 145/297 cut-off events. For 1051/1051 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1150 event pairs, 37 based on Foata normal form. 14/304 useless extension candidates. Maximal degree in co-relation 1324. Up to 144 conditions per place. [2023-11-29 04:21:08,979 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 59 selfloop transitions, 9 changer transitions 17/88 dead transitions. [2023-11-29 04:21:08,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 88 transitions, 853 flow [2023-11-29 04:21:08,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:21:08,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:21:08,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2023-11-29 04:21:08,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2023-11-29 04:21:08,980 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 71 transitions. [2023-11-29 04:21:08,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 71 transitions. [2023-11-29 04:21:08,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:21:08,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 71 transitions. [2023-11-29 04:21:08,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:08,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:08,982 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:08,982 INFO L175 Difference]: Start difference. First operand has 82 places, 93 transitions, 798 flow. Second operand 7 states and 71 transitions. [2023-11-29 04:21:08,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 88 transitions, 853 flow [2023-11-29 04:21:08,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 801 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-29 04:21:08,988 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 505 flow [2023-11-29 04:21:08,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=505, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2023-11-29 04:21:08,989 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 59 predicate places. [2023-11-29 04:21:08,989 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 505 flow [2023-11-29 04:21:08,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:08,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:21:08,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:21:08,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 04:21:09,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 04:21:09,190 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:21:09,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:09,190 INFO L85 PathProgramCache]: Analyzing trace with hash 644794061, now seen corresponding path program 9 times [2023-11-29 04:21:09,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:09,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372198192] [2023-11-29 04:21:09,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:09,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:21:09,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:09,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372198192] [2023-11-29 04:21:09,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372198192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:21:09,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998729867] [2023-11-29 04:21:09,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:21:09,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:09,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:21:09,304 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:21:09,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:21:09,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:21:09,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:21:09,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:21:09,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:21:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:21:09,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:21:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:21:09,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998729867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:21:09,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:21:09,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 04:21:09,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626666306] [2023-11-29 04:21:09,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:21:09,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:21:09,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:09,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:21:09,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:21:09,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:21:09,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 505 flow. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 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 04:21:09,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:21:09,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:21:09,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:21:09,730 INFO L124 PetriNetUnfolderBase]: 135/259 cut-off events. [2023-11-29 04:21:09,731 INFO L125 PetriNetUnfolderBase]: For 1166/1166 co-relation queries the response was YES. [2023-11-29 04:21:09,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 259 events. 135/259 cut-off events. For 1166/1166 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 892 event pairs, 18 based on Foata normal form. 16/270 useless extension candidates. Maximal degree in co-relation 1200. Up to 139 conditions per place. [2023-11-29 04:21:09,734 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 51 selfloop transitions, 20 changer transitions 0/74 dead transitions. [2023-11-29 04:21:09,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 709 flow [2023-11-29 04:21:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:21:09,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 04:21:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 70 transitions. [2023-11-29 04:21:09,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-29 04:21:09,735 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 70 transitions. [2023-11-29 04:21:09,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 70 transitions. [2023-11-29 04:21:09,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:21:09,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 70 transitions. [2023-11-29 04:21:09,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:09,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:09,737 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:09,737 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 505 flow. Second operand 8 states and 70 transitions. [2023-11-29 04:21:09,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 709 flow [2023-11-29 04:21:09,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 650 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-11-29 04:21:09,744 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 497 flow [2023-11-29 04:21:09,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=497, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-11-29 04:21:09,745 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 44 predicate places. [2023-11-29 04:21:09,745 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 497 flow [2023-11-29 04:21:09,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 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 04:21:09,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:21:09,745 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:21:09,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 04:21:09,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 04:21:09,946 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:21:09,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:09,946 INFO L85 PathProgramCache]: Analyzing trace with hash 2072135018, now seen corresponding path program 10 times [2023-11-29 04:21:09,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:09,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757628036] [2023-11-29 04:21:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:09,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:21:10,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:10,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757628036] [2023-11-29 04:21:10,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757628036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:21:10,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454843342] [2023-11-29 04:21:10,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:21:10,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:10,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:21:10,086 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:21:10,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:21:10,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:21:10,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:21:10,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:21:10,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:21:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:21:10,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:21:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:21:10,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454843342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:21:10,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:21:10,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 04:21:10,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394765327] [2023-11-29 04:21:10,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:21:10,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:21:10,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:10,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:21:10,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:21:10,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:21:10,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 497 flow. Second operand has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:10,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:21:10,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:21:10,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:21:10,505 INFO L124 PetriNetUnfolderBase]: 117/224 cut-off events. [2023-11-29 04:21:10,505 INFO L125 PetriNetUnfolderBase]: For 974/974 co-relation queries the response was YES. [2023-11-29 04:21:10,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 224 events. 117/224 cut-off events. For 974/974 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 675 event pairs, 16 based on Foata normal form. 14/235 useless extension candidates. Maximal degree in co-relation 1099. Up to 159 conditions per place. [2023-11-29 04:21:10,508 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 49 selfloop transitions, 15 changer transitions 0/67 dead transitions. [2023-11-29 04:21:10,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 645 flow [2023-11-29 04:21:10,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:21:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 04:21:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 70 transitions. [2023-11-29 04:21:10,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-29 04:21:10,509 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 70 transitions. [2023-11-29 04:21:10,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 70 transitions. [2023-11-29 04:21:10,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:21:10,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 70 transitions. [2023-11-29 04:21:10,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:10,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:10,511 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:10,511 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 497 flow. Second operand 8 states and 70 transitions. [2023-11-29 04:21:10,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 645 flow [2023-11-29 04:21:10,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 67 transitions, 605 flow, removed 13 selfloop flow, removed 7 redundant places. [2023-11-29 04:21:10,516 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 458 flow [2023-11-29 04:21:10,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=458, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-11-29 04:21:10,517 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 41 predicate places. [2023-11-29 04:21:10,517 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 458 flow [2023-11-29 04:21:10,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:10,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:21:10,517 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:21:10,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 04:21:10,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 04:21:10,723 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:21:10,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:10,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2034070010, now seen corresponding path program 11 times [2023-11-29 04:21:10,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:10,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383292673] [2023-11-29 04:21:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:10,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:15,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:15,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383292673] [2023-11-29 04:21:15,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383292673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:21:15,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028573631] [2023-11-29 04:21:15,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:21:15,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:15,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:21:15,229 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:21:15,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:21:15,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:21:15,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:21:15,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 04:21:15,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:21:16,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:21:16,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 138 [2023-11-29 04:21:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:21:16,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:21:17,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:21:17,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 966 treesize of output 426 [2023-11-29 04:21:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:21:29,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028573631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:21:29,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:21:29,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2023-11-29 04:21:29,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106189467] [2023-11-29 04:21:29,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:21:29,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 04:21:29,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:29,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 04:21:29,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2023-11-29 04:21:29,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:21:29,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 458 flow. Second operand has 25 states, 25 states have (on average 6.88) internal successors, (172), 25 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:29,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:21:29,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:21:29,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:21:30,655 INFO L124 PetriNetUnfolderBase]: 191/363 cut-off events. [2023-11-29 04:21:30,655 INFO L125 PetriNetUnfolderBase]: For 1122/1122 co-relation queries the response was YES. [2023-11-29 04:21:30,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1800 conditions, 363 events. 191/363 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1333 event pairs, 8 based on Foata normal form. 1/357 useless extension candidates. Maximal degree in co-relation 1615. Up to 204 conditions per place. [2023-11-29 04:21:30,658 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 97 selfloop transitions, 43 changer transitions 5/148 dead transitions. [2023-11-29 04:21:30,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 148 transitions, 1178 flow [2023-11-29 04:21:30,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 04:21:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 04:21:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 251 transitions. [2023-11-29 04:21:30,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597069597069597 [2023-11-29 04:21:30,660 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 251 transitions. [2023-11-29 04:21:30,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 251 transitions. [2023-11-29 04:21:30,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:21:30,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 251 transitions. [2023-11-29 04:21:30,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:30,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 21.0) internal successors, (567), 27 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:30,663 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 21.0) internal successors, (567), 27 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:30,664 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 458 flow. Second operand 26 states and 251 transitions. [2023-11-29 04:21:30,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 148 transitions, 1178 flow [2023-11-29 04:21:30,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 148 transitions, 1154 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-29 04:21:30,670 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 841 flow [2023-11-29 04:21:30,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=841, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2023-11-29 04:21:30,671 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 69 predicate places. [2023-11-29 04:21:30,671 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 841 flow [2023-11-29 04:21:30,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.88) internal successors, (172), 25 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:30,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:21:30,671 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:21:30,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 04:21:30,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 04:21:30,872 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:21:30,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:30,872 INFO L85 PathProgramCache]: Analyzing trace with hash -148695080, now seen corresponding path program 12 times [2023-11-29 04:21:30,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:30,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637992148] [2023-11-29 04:21:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:30,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:31,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:31,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637992148] [2023-11-29 04:21:31,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637992148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:21:31,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277785350] [2023-11-29 04:21:31,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:21:31,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:31,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:21:31,929 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:21:31,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 04:21:32,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 04:21:32,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:21:32,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 04:21:32,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:21:32,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:21:32,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 163 [2023-11-29 04:21:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:33,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:21:34,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:21:34,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 966 treesize of output 426 [2023-11-29 04:21:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:21:46,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277785350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:21:46,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:21:46,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2023-11-29 04:21:46,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52198625] [2023-11-29 04:21:46,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:21:46,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:21:46,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:46,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:21:46,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:21:46,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:21:46,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 841 flow. Second operand has 26 states, 26 states have (on average 6.730769230769231) internal successors, (175), 26 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:46,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:21:46,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:21:46,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:21:49,417 INFO L124 PetriNetUnfolderBase]: 337/595 cut-off events. [2023-11-29 04:21:49,417 INFO L125 PetriNetUnfolderBase]: For 2348/2348 co-relation queries the response was YES. [2023-11-29 04:21:49,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 595 events. 337/595 cut-off events. For 2348/2348 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2422 event pairs, 22 based on Foata normal form. 1/579 useless extension candidates. Maximal degree in co-relation 3392. Up to 350 conditions per place. [2023-11-29 04:21:49,423 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 103 selfloop transitions, 99 changer transitions 6/211 dead transitions. [2023-11-29 04:21:49,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 211 transitions, 2307 flow [2023-11-29 04:21:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 04:21:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-29 04:21:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 332 transitions. [2023-11-29 04:21:49,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170068027210886 [2023-11-29 04:21:49,426 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 332 transitions. [2023-11-29 04:21:49,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 332 transitions. [2023-11-29 04:21:49,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:21:49,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 332 transitions. [2023-11-29 04:21:49,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 9.485714285714286) internal successors, (332), 35 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:49,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 21.0) internal successors, (756), 36 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:49,429 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 21.0) internal successors, (756), 36 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:49,429 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 841 flow. Second operand 35 states and 332 transitions. [2023-11-29 04:21:49,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 211 transitions, 2307 flow [2023-11-29 04:21:49,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 211 transitions, 2142 flow, removed 62 selfloop flow, removed 9 redundant places. [2023-11-29 04:21:49,439 INFO L231 Difference]: Finished difference. Result has 122 places, 150 transitions, 1838 flow [2023-11-29 04:21:49,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1838, PETRI_PLACES=122, PETRI_TRANSITIONS=150} [2023-11-29 04:21:49,439 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 100 predicate places. [2023-11-29 04:21:49,439 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 150 transitions, 1838 flow [2023-11-29 04:21:49,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.730769230769231) internal successors, (175), 26 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:49,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:21:49,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:21:49,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 04:21:49,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 04:21:49,640 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:21:49,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:49,641 INFO L85 PathProgramCache]: Analyzing trace with hash 267754924, now seen corresponding path program 13 times [2023-11-29 04:21:49,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:49,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911643535] [2023-11-29 04:21:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:49,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:51,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:51,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911643535] [2023-11-29 04:21:51,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911643535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:21:51,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273106322] [2023-11-29 04:21:51,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:21:51,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:51,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:21:51,355 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:21:51,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 04:21:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:51,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 04:21:51,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:21:52,332 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:21:52,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 221 treesize of output 141 [2023-11-29 04:21:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:52,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:21:53,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:21:53,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 966 treesize of output 426 [2023-11-29 04:22:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:22:12,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273106322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:22:12,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:22:12,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2023-11-29 04:22:12,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543733040] [2023-11-29 04:22:12,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:22:12,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:22:12,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:22:12,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:22:12,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:22:12,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:22:12,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 150 transitions, 1838 flow. Second operand has 26 states, 26 states have (on average 6.846153846153846) internal successors, (178), 26 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 04:22:12,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:22:12,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:22:12,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:22:14,461 INFO L124 PetriNetUnfolderBase]: 343/607 cut-off events. [2023-11-29 04:22:14,462 INFO L125 PetriNetUnfolderBase]: For 2964/2964 co-relation queries the response was YES. [2023-11-29 04:22:14,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3812 conditions, 607 events. 343/607 cut-off events. For 2964/2964 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2432 event pairs, 26 based on Foata normal form. 2/604 useless extension candidates. Maximal degree in co-relation 3765. Up to 460 conditions per place. [2023-11-29 04:22:14,468 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 118 selfloop transitions, 70 changer transitions 6/197 dead transitions. [2023-11-29 04:22:14,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 197 transitions, 2380 flow [2023-11-29 04:22:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 04:22:14,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 04:22:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 223 transitions. [2023-11-29 04:22:14,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44246031746031744 [2023-11-29 04:22:14,470 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 223 transitions. [2023-11-29 04:22:14,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 223 transitions. [2023-11-29 04:22:14,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:22:14,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 223 transitions. [2023-11-29 04:22:14,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 9.291666666666666) internal successors, (223), 24 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:22:14,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 21.0) internal successors, (525), 25 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:22:14,472 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 21.0) internal successors, (525), 25 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:22:14,472 INFO L175 Difference]: Start difference. First operand has 122 places, 150 transitions, 1838 flow. Second operand 24 states and 223 transitions. [2023-11-29 04:22:14,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 197 transitions, 2380 flow [2023-11-29 04:22:14,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 197 transitions, 1752 flow, removed 272 selfloop flow, removed 18 redundant places. [2023-11-29 04:22:14,486 INFO L231 Difference]: Finished difference. Result has 130 places, 153 transitions, 1404 flow [2023-11-29 04:22:14,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1404, PETRI_PLACES=130, PETRI_TRANSITIONS=153} [2023-11-29 04:22:14,486 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 108 predicate places. [2023-11-29 04:22:14,486 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 153 transitions, 1404 flow [2023-11-29 04:22:14,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.846153846153846) internal successors, (178), 26 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 04:22:14,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:22:14,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:22:14,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 04:22:14,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 04:22:14,687 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:22:14,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:22:14,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2033272566, now seen corresponding path program 14 times [2023-11-29 04:22:14,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:22:14,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491695625] [2023-11-29 04:22:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:22:14,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:22:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:22:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:22:15,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:22:15,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491695625] [2023-11-29 04:22:15,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491695625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:22:15,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616496772] [2023-11-29 04:22:15,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:22:15,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:22:15,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:22:15,415 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:22:15,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 04:22:15,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:22:15,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:22:15,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 04:22:15,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:22:16,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:22:16,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 165 [2023-11-29 04:22:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:22:16,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:22:18,239 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:22:18,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 966 treesize of output 426 [2023-11-29 04:22:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:22:35,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616496772] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:22:35,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:22:35,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2023-11-29 04:22:35,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595384360] [2023-11-29 04:22:35,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:22:35,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 04:22:35,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:22:35,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 04:22:35,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2023-11-29 04:22:35,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:22:35,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 153 transitions, 1404 flow. Second operand has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:22:35,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:22:35,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:22:35,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:22:37,280 INFO L124 PetriNetUnfolderBase]: 375/662 cut-off events. [2023-11-29 04:22:37,281 INFO L125 PetriNetUnfolderBase]: For 2227/2227 co-relation queries the response was YES. [2023-11-29 04:22:37,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3532 conditions, 662 events. 375/662 cut-off events. For 2227/2227 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2772 event pairs, 22 based on Foata normal form. 1/646 useless extension candidates. Maximal degree in co-relation 3484. Up to 436 conditions per place. [2023-11-29 04:22:37,289 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 105 selfloop transitions, 105 changer transitions 7/220 dead transitions. [2023-11-29 04:22:37,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 220 transitions, 2204 flow [2023-11-29 04:22:37,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 04:22:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 04:22:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 252 transitions. [2023-11-29 04:22:37,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-29 04:22:37,290 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 252 transitions. [2023-11-29 04:22:37,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 252 transitions. [2023-11-29 04:22:37,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:22:37,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 252 transitions. [2023-11-29 04:22:37,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 9.333333333333334) internal successors, (252), 27 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:22:37,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 21.0) internal successors, (588), 28 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:22:37,293 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 21.0) internal successors, (588), 28 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:22:37,293 INFO L175 Difference]: Start difference. First operand has 130 places, 153 transitions, 1404 flow. Second operand 27 states and 252 transitions. [2023-11-29 04:22:37,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 220 transitions, 2204 flow [2023-11-29 04:22:37,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 220 transitions, 2038 flow, removed 18 selfloop flow, removed 19 redundant places. [2023-11-29 04:22:37,304 INFO L231 Difference]: Finished difference. Result has 141 places, 174 transitions, 1787 flow [2023-11-29 04:22:37,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1787, PETRI_PLACES=141, PETRI_TRANSITIONS=174} [2023-11-29 04:22:37,305 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 119 predicate places. [2023-11-29 04:22:37,305 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 174 transitions, 1787 flow [2023-11-29 04:22:37,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:22:37,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:22:37,305 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:22:37,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 04:22:37,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:22:37,506 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:22:37,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:22:37,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1038424556, now seen corresponding path program 15 times [2023-11-29 04:22:37,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:22:37,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124929656] [2023-11-29 04:22:37,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:22:37,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:22:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:22:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:22:38,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:22:38,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124929656] [2023-11-29 04:22:38,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124929656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:22:38,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210464435] [2023-11-29 04:22:38,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:22:38,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:22:38,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:22:38,588 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:22:38,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 04:22:38,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 04:22:38,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:22:38,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 04:22:38,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:22:38,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:22:38,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:22:39,577 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:22:39,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 234 treesize of output 146 [2023-11-29 04:22:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:22:39,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:22:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:22:48,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210464435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:22:48,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:22:48,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2023-11-29 04:22:48,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956135301] [2023-11-29 04:22:48,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:22:48,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 04:22:48,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:22:48,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 04:22:48,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2023-11-29 04:22:48,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:22:48,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 174 transitions, 1787 flow. Second operand has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:22:48,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:22:48,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:22:48,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:22:52,366 INFO L124 PetriNetUnfolderBase]: 521/956 cut-off events. [2023-11-29 04:22:52,367 INFO L125 PetriNetUnfolderBase]: For 3636/3636 co-relation queries the response was YES. [2023-11-29 04:22:52,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5462 conditions, 956 events. 521/956 cut-off events. For 3636/3636 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4696 event pairs, 28 based on Foata normal form. 2/947 useless extension candidates. Maximal degree in co-relation 5407. Up to 521 conditions per place. [2023-11-29 04:22:52,378 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 165 selfloop transitions, 142 changer transitions 8/318 dead transitions. [2023-11-29 04:22:52,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 318 transitions, 3550 flow [2023-11-29 04:22:52,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 04:22:52,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-29 04:22:52,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 377 transitions. [2023-11-29 04:22:52,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2023-11-29 04:22:52,380 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 377 transitions. [2023-11-29 04:22:52,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 377 transitions. [2023-11-29 04:22:52,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:22:52,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 377 transitions. [2023-11-29 04:22:52,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 9.666666666666666) internal successors, (377), 39 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:22:52,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 21.0) internal successors, (840), 40 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:22:52,384 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 21.0) internal successors, (840), 40 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:22:52,384 INFO L175 Difference]: Start difference. First operand has 141 places, 174 transitions, 1787 flow. Second operand 39 states and 377 transitions. [2023-11-29 04:22:52,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 318 transitions, 3550 flow [2023-11-29 04:22:52,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 318 transitions, 3407 flow, removed 32 selfloop flow, removed 20 redundant places. [2023-11-29 04:22:52,414 INFO L231 Difference]: Finished difference. Result has 168 places, 238 transitions, 3009 flow [2023-11-29 04:22:52,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=3009, PETRI_PLACES=168, PETRI_TRANSITIONS=238} [2023-11-29 04:22:52,415 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 146 predicate places. [2023-11-29 04:22:52,415 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 238 transitions, 3009 flow [2023-11-29 04:22:52,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:22:52,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:22:52,415 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:22:52,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 04:22:52,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:22:52,616 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:22:52,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:22:52,616 INFO L85 PathProgramCache]: Analyzing trace with hash -337536676, now seen corresponding path program 16 times [2023-11-29 04:22:52,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:22:52,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165761373] [2023-11-29 04:22:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:22:52,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:22:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:22:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:22:54,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:22:54,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165761373] [2023-11-29 04:22:54,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165761373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:22:54,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258204598] [2023-11-29 04:22:54,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:22:54,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:22:54,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:22:54,572 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:22:54,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 04:22:54,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:22:54,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:22:54,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 04:22:54,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:22:54,704 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 25 treesize of output 1 [2023-11-29 04:22:54,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 04:22:55,397 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:22:55,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 140 [2023-11-29 04:22:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:22:55,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:23:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:23:04,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258204598] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:23:04,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:23:04,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 26 [2023-11-29 04:23:04,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203836809] [2023-11-29 04:23:04,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:23:04,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:23:04,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:23:04,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:23:04,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:23:04,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:23:04,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 238 transitions, 3009 flow. Second operand has 26 states, 26 states have (on average 6.8076923076923075) internal successors, (177), 26 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:23:04,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:23:04,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:23:04,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:23:16,912 INFO L124 PetriNetUnfolderBase]: 643/1180 cut-off events. [2023-11-29 04:23:16,912 INFO L125 PetriNetUnfolderBase]: For 6144/6144 co-relation queries the response was YES. [2023-11-29 04:23:16,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7596 conditions, 1180 events. 643/1180 cut-off events. For 6144/6144 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6177 event pairs, 0 based on Foata normal form. 3/1168 useless extension candidates. Maximal degree in co-relation 7531. Up to 363 conditions per place. [2023-11-29 04:23:16,930 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 156 selfloop transitions, 234 changer transitions 16/409 dead transitions. [2023-11-29 04:23:16,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 409 transitions, 4979 flow [2023-11-29 04:23:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 04:23:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-29 04:23:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 452 transitions. [2023-11-29 04:23:16,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783068783068783 [2023-11-29 04:23:16,933 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 452 transitions. [2023-11-29 04:23:16,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 452 transitions. [2023-11-29 04:23:16,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:23:16,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 452 transitions. [2023-11-29 04:23:16,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 10.044444444444444) internal successors, (452), 45 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:23:16,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 21.0) internal successors, (966), 46 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:23:16,937 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 21.0) internal successors, (966), 46 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:23:16,937 INFO L175 Difference]: Start difference. First operand has 168 places, 238 transitions, 3009 flow. Second operand 45 states and 452 transitions. [2023-11-29 04:23:16,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 409 transitions, 4979 flow [2023-11-29 04:23:16,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 409 transitions, 4384 flow, removed 254 selfloop flow, removed 21 redundant places. [2023-11-29 04:23:16,993 INFO L231 Difference]: Finished difference. Result has 194 places, 285 transitions, 3728 flow [2023-11-29 04:23:16,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3728, PETRI_PLACES=194, PETRI_TRANSITIONS=285} [2023-11-29 04:23:16,994 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 172 predicate places. [2023-11-29 04:23:16,994 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 285 transitions, 3728 flow [2023-11-29 04:23:16,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.8076923076923075) internal successors, (177), 26 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:23:16,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:23:16,995 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:23:16,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 04:23:17,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:23:17,195 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:23:17,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:23:17,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1701137750, now seen corresponding path program 17 times [2023-11-29 04:23:17,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:23:17,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324595523] [2023-11-29 04:23:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:23:17,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:23:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:23:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:23:19,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:23:19,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324595523] [2023-11-29 04:23:19,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324595523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:23:19,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932879051] [2023-11-29 04:23:19,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:23:19,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:23:19,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:23:19,782 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:23:19,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 04:23:19,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 04:23:19,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:23:19,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 04:23:19,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:23:19,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:23:20,605 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:23:20,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 145 [2023-11-29 04:23:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:23:20,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:23:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:23:28,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932879051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:23:28,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:23:28,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2023-11-29 04:23:28,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312668108] [2023-11-29 04:23:28,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:23:28,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:23:28,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:23:28,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:23:28,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:23:28,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:23:28,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 285 transitions, 3728 flow. Second operand has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:23:28,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:23:28,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:23:28,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:23:30,460 INFO L124 PetriNetUnfolderBase]: 636/1166 cut-off events. [2023-11-29 04:23:30,460 INFO L125 PetriNetUnfolderBase]: For 5936/5936 co-relation queries the response was YES. [2023-11-29 04:23:30,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7685 conditions, 1166 events. 636/1166 cut-off events. For 5936/5936 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6055 event pairs, 66 based on Foata normal form. 1/1158 useless extension candidates. Maximal degree in co-relation 7616. Up to 1010 conditions per place. [2023-11-29 04:23:30,474 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 250 selfloop transitions, 82 changer transitions 6/341 dead transitions. [2023-11-29 04:23:30,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 341 transitions, 4749 flow [2023-11-29 04:23:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 04:23:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 04:23:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 244 transitions. [2023-11-29 04:23:30,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4468864468864469 [2023-11-29 04:23:30,476 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 244 transitions. [2023-11-29 04:23:30,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 244 transitions. [2023-11-29 04:23:30,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:23:30,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 244 transitions. [2023-11-29 04:23:30,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 9.384615384615385) internal successors, (244), 26 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:23:30,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 21.0) internal successors, (567), 27 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:23:30,478 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 21.0) internal successors, (567), 27 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:23:30,478 INFO L175 Difference]: Start difference. First operand has 194 places, 285 transitions, 3728 flow. Second operand 26 states and 244 transitions. [2023-11-29 04:23:30,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 341 transitions, 4749 flow [2023-11-29 04:23:30,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 341 transitions, 4144 flow, removed 221 selfloop flow, removed 29 redundant places. [2023-11-29 04:23:30,544 INFO L231 Difference]: Finished difference. Result has 193 places, 295 transitions, 3549 flow [2023-11-29 04:23:30,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3181, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3549, PETRI_PLACES=193, PETRI_TRANSITIONS=295} [2023-11-29 04:23:30,545 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 171 predicate places. [2023-11-29 04:23:30,545 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 295 transitions, 3549 flow [2023-11-29 04:23:30,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:23:30,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:23:30,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:23:30,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 04:23:30,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:23:30,746 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:23:30,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:23:30,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1182993474, now seen corresponding path program 18 times [2023-11-29 04:23:30,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:23:30,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588129799] [2023-11-29 04:23:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:23:30,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:23:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:23:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:23:31,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:23:31,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588129799] [2023-11-29 04:23:31,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588129799] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:23:31,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414305259] [2023-11-29 04:23:31,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:23:31,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:23:31,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:23:31,970 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:23:31,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 04:23:32,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 04:23:32,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:23:32,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 04:23:32,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:23:32,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:23:32,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:23:32,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:23:32,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 142 [2023-11-29 04:23:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:23:33,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:23:41,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 87 [2023-11-29 04:23:41,822 INFO L349 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2023-11-29 04:23:41,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 320 treesize of output 275 [2023-11-29 04:23:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:23:42,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414305259] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:23:42,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:23:42,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-11-29 04:23:42,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547411167] [2023-11-29 04:23:42,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:23:42,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 04:23:42,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:23:42,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 04:23:42,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:23:42,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:23:42,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 295 transitions, 3549 flow. Second operand has 29 states, 29 states have (on average 6.620689655172414) internal successors, (192), 29 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:23:42,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:23:42,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:23:42,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:23:50,251 INFO L124 PetriNetUnfolderBase]: 893/1613 cut-off events. [2023-11-29 04:23:50,252 INFO L125 PetriNetUnfolderBase]: For 7457/7457 co-relation queries the response was YES. [2023-11-29 04:23:50,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10023 conditions, 1613 events. 893/1613 cut-off events. For 7457/7457 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 8899 event pairs, 0 based on Foata normal form. 1/1611 useless extension candidates. Maximal degree in co-relation 9954. Up to 527 conditions per place. [2023-11-29 04:23:50,269 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 257 selfloop transitions, 216 changer transitions 7/483 dead transitions. [2023-11-29 04:23:50,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 483 transitions, 6360 flow [2023-11-29 04:23:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 04:23:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-29 04:23:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 312 transitions. [2023-11-29 04:23:50,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4792626728110599 [2023-11-29 04:23:50,271 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 312 transitions. [2023-11-29 04:23:50,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 312 transitions. [2023-11-29 04:23:50,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:23:50,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 312 transitions. [2023-11-29 04:23:50,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 10.064516129032258) internal successors, (312), 31 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:23:50,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 21.0) internal successors, (672), 32 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 04:23:50,274 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 21.0) internal successors, (672), 32 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 04:23:50,274 INFO L175 Difference]: Start difference. First operand has 193 places, 295 transitions, 3549 flow. Second operand 31 states and 312 transitions. [2023-11-29 04:23:50,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 483 transitions, 6360 flow [2023-11-29 04:23:50,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 483 transitions, 6109 flow, removed 86 selfloop flow, removed 19 redundant places. [2023-11-29 04:23:50,340 INFO L231 Difference]: Finished difference. Result has 213 places, 376 transitions, 5120 flow [2023-11-29 04:23:50,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=5120, PETRI_PLACES=213, PETRI_TRANSITIONS=376} [2023-11-29 04:23:50,340 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 191 predicate places. [2023-11-29 04:23:50,340 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 376 transitions, 5120 flow [2023-11-29 04:23:50,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.620689655172414) internal successors, (192), 29 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:23:50,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:23:50,341 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:23:50,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 04:23:50,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:23:50,541 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:23:50,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:23:50,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1009424188, now seen corresponding path program 19 times [2023-11-29 04:23:50,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:23:50,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45206182] [2023-11-29 04:23:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:23:50,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:23:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:23:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:23:51,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:23:51,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45206182] [2023-11-29 04:23:51,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45206182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:23:51,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140116560] [2023-11-29 04:23:51,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:23:51,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:23:51,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:23:51,783 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:23:51,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 04:23:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:23:51,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 04:23:51,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:23:51,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:23:51,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:23:52,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:23:52,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 145 [2023-11-29 04:23:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:23:52,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:24:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:24:01,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140116560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:24:01,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:24:01,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2023-11-29 04:24:01,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733129203] [2023-11-29 04:24:01,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:24:01,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 04:24:01,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:24:01,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 04:24:01,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2023-11-29 04:24:01,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:24:01,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 376 transitions, 5120 flow. Second operand has 27 states, 27 states have (on average 6.814814814814815) internal successors, (184), 27 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 04:24:01,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:24:01,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:24:01,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:24:04,215 INFO L124 PetriNetUnfolderBase]: 949/1726 cut-off events. [2023-11-29 04:24:04,215 INFO L125 PetriNetUnfolderBase]: For 10538/10538 co-relation queries the response was YES. [2023-11-29 04:24:04,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11588 conditions, 1726 events. 949/1726 cut-off events. For 10538/10538 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 9770 event pairs, 38 based on Foata normal form. 2/1723 useless extension candidates. Maximal degree in co-relation 11509. Up to 1243 conditions per place. [2023-11-29 04:24:04,232 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 304 selfloop transitions, 165 changer transitions 10/482 dead transitions. [2023-11-29 04:24:04,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 482 transitions, 6657 flow [2023-11-29 04:24:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 04:24:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-29 04:24:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 353 transitions. [2023-11-29 04:24:04,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48027210884353744 [2023-11-29 04:24:04,234 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 353 transitions. [2023-11-29 04:24:04,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 353 transitions. [2023-11-29 04:24:04,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:24:04,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 353 transitions. [2023-11-29 04:24:04,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 10.085714285714285) internal successors, (353), 35 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:24:04,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 21.0) internal successors, (756), 36 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:24:04,236 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 21.0) internal successors, (756), 36 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:24:04,236 INFO L175 Difference]: Start difference. First operand has 213 places, 376 transitions, 5120 flow. Second operand 35 states and 353 transitions. [2023-11-29 04:24:04,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 482 transitions, 6657 flow [2023-11-29 04:24:04,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 482 transitions, 6420 flow, removed 99 selfloop flow, removed 14 redundant places. [2023-11-29 04:24:04,322 INFO L231 Difference]: Finished difference. Result has 239 places, 393 transitions, 5656 flow [2023-11-29 04:24:04,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4899, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5656, PETRI_PLACES=239, PETRI_TRANSITIONS=393} [2023-11-29 04:24:04,323 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 217 predicate places. [2023-11-29 04:24:04,323 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 393 transitions, 5656 flow [2023-11-29 04:24:04,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.814814814814815) internal successors, (184), 27 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 04:24:04,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:24:04,323 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:24:04,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 04:24:04,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:24:04,524 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:24:04,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:24:04,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1199112454, now seen corresponding path program 20 times [2023-11-29 04:24:04,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:24:04,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177669873] [2023-11-29 04:24:04,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:24:04,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:24:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:24:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:24:06,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:24:06,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177669873] [2023-11-29 04:24:06,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177669873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:24:06,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219778491] [2023-11-29 04:24:06,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:24:06,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:24:06,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:24:06,127 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:24:06,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 04:24:06,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:24:06,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:24:06,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 04:24:06,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:24:07,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:24:07,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 161 [2023-11-29 04:24:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:24:07,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:24:09,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:24:09,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 997 treesize of output 437 [2023-11-29 04:24:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:24:22,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219778491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:24:22,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:24:22,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2023-11-29 04:24:22,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735695387] [2023-11-29 04:24:22,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:24:22,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 04:24:22,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:24:22,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 04:24:22,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2023-11-29 04:24:22,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:24:22,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 393 transitions, 5656 flow. Second operand has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:24:22,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:24:22,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:24:22,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:24:30,219 INFO L124 PetriNetUnfolderBase]: 1020/1854 cut-off events. [2023-11-29 04:24:30,219 INFO L125 PetriNetUnfolderBase]: For 12679/12679 co-relation queries the response was YES. [2023-11-29 04:24:30,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13320 conditions, 1854 events. 1020/1854 cut-off events. For 12679/12679 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 10649 event pairs, 80 based on Foata normal form. 2/1851 useless extension candidates. Maximal degree in co-relation 13234. Up to 581 conditions per place. [2023-11-29 04:24:30,238 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 257 selfloop transitions, 295 changer transitions 16/571 dead transitions. [2023-11-29 04:24:30,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 571 transitions, 8736 flow [2023-11-29 04:24:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 04:24:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-29 04:24:30,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 462 transitions. [2023-11-29 04:24:30,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2023-11-29 04:24:30,239 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 462 transitions. [2023-11-29 04:24:30,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 462 transitions. [2023-11-29 04:24:30,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:24:30,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 462 transitions. [2023-11-29 04:24:30,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 9.428571428571429) internal successors, (462), 49 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:24:30,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 21.0) internal successors, (1050), 50 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:24:30,243 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 21.0) internal successors, (1050), 50 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:24:30,243 INFO L175 Difference]: Start difference. First operand has 239 places, 393 transitions, 5656 flow. Second operand 49 states and 462 transitions. [2023-11-29 04:24:30,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 571 transitions, 8736 flow [2023-11-29 04:24:30,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 571 transitions, 8416 flow, removed 102 selfloop flow, removed 23 redundant places. [2023-11-29 04:24:30,349 INFO L231 Difference]: Finished difference. Result has 275 places, 476 transitions, 7898 flow [2023-11-29 04:24:30,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5420, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=7898, PETRI_PLACES=275, PETRI_TRANSITIONS=476} [2023-11-29 04:24:30,350 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 253 predicate places. [2023-11-29 04:24:30,350 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 476 transitions, 7898 flow [2023-11-29 04:24:30,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:24:30,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:24:30,350 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:24:30,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 04:24:30,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:24:30,550 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:24:30,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:24:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash -518455776, now seen corresponding path program 21 times [2023-11-29 04:24:30,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:24:30,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645874100] [2023-11-29 04:24:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:24:30,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:24:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:24:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:24:31,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:24:31,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645874100] [2023-11-29 04:24:31,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645874100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:24:31,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463168369] [2023-11-29 04:24:31,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:24:31,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:24:31,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:24:31,283 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:24:31,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 04:24:31,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 04:24:31,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:24:31,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 04:24:31,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:24:32,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:24:32,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 294 treesize of output 270 [2023-11-29 04:24:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:24:49,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:24:51,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:24:51,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 935 treesize of output 441 [2023-11-29 04:25:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:52,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463168369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:25:52,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:25:52,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-11-29 04:25:52,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757067635] [2023-11-29 04:25:52,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:25:52,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 04:25:52,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:52,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 04:25:52,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-11-29 04:25:52,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:25:52,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 476 transitions, 7898 flow. Second operand has 30 states, 30 states have (on average 6.533333333333333) internal successors, (196), 30 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 04:25:52,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:25:52,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:25:52,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:25:57,524 INFO L124 PetriNetUnfolderBase]: 1075/1939 cut-off events. [2023-11-29 04:25:57,524 INFO L125 PetriNetUnfolderBase]: For 17176/17176 co-relation queries the response was YES. [2023-11-29 04:25:57,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15122 conditions, 1939 events. 1075/1939 cut-off events. For 17176/17176 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 11211 event pairs, 104 based on Foata normal form. 2/1936 useless extension candidates. Maximal degree in co-relation 15024. Up to 1726 conditions per place. [2023-11-29 04:25:57,546 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 428 selfloop transitions, 118 changer transitions 8/557 dead transitions. [2023-11-29 04:25:57,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 557 transitions, 10111 flow [2023-11-29 04:25:57,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 04:25:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-29 04:25:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 274 transitions. [2023-11-29 04:25:57,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42089093701996927 [2023-11-29 04:25:57,547 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 274 transitions. [2023-11-29 04:25:57,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 274 transitions. [2023-11-29 04:25:57,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:25:57,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 274 transitions. [2023-11-29 04:25:57,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 8.838709677419354) internal successors, (274), 31 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:57,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 21.0) internal successors, (672), 32 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 04:25:57,549 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 21.0) internal successors, (672), 32 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 04:25:57,549 INFO L175 Difference]: Start difference. First operand has 275 places, 476 transitions, 7898 flow. Second operand 31 states and 274 transitions. [2023-11-29 04:25:57,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 557 transitions, 10111 flow [2023-11-29 04:25:57,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 557 transitions, 9204 flow, removed 402 selfloop flow, removed 26 redundant places. [2023-11-29 04:25:57,720 INFO L231 Difference]: Finished difference. Result has 286 places, 515 transitions, 8296 flow [2023-11-29 04:25:57,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7195, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=8296, PETRI_PLACES=286, PETRI_TRANSITIONS=515} [2023-11-29 04:25:57,720 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 264 predicate places. [2023-11-29 04:25:57,721 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 515 transitions, 8296 flow [2023-11-29 04:25:57,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.533333333333333) internal successors, (196), 30 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 04:25:57,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:25:57,721 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:57,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 04:25:57,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:57,921 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:25:57,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:57,922 INFO L85 PathProgramCache]: Analyzing trace with hash -967475776, now seen corresponding path program 22 times [2023-11-29 04:25:57,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:57,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423592660] [2023-11-29 04:25:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:57,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:59,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:59,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423592660] [2023-11-29 04:25:59,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423592660] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:25:59,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487927367] [2023-11-29 04:25:59,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:25:59,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:59,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:25:59,406 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:25:59,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 04:25:59,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:25:59,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:25:59,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 04:25:59,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:26:00,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:26:00,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 164 [2023-11-29 04:26:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:26:00,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:26:02,446 INFO L349 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2023-11-29 04:26:02,447 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 787 treesize of output 375 [2023-11-29 04:26:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:26:05,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487927367] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:26:05,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:26:05,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2023-11-29 04:26:05,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684757929] [2023-11-29 04:26:05,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:26:05,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 04:26:05,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:26:05,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 04:26:05,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2023-11-29 04:26:05,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:26:05,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 515 transitions, 8296 flow. Second operand has 27 states, 27 states have (on average 6.814814814814815) internal successors, (184), 27 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 04:26:05,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:26:05,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:26:05,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:26:13,928 INFO L124 PetriNetUnfolderBase]: 1184/2115 cut-off events. [2023-11-29 04:26:13,928 INFO L125 PetriNetUnfolderBase]: For 15976/15976 co-relation queries the response was YES. [2023-11-29 04:26:13,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15950 conditions, 2115 events. 1184/2115 cut-off events. For 15976/15976 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 12401 event pairs, 0 based on Foata normal form. 2/2106 useless extension candidates. Maximal degree in co-relation 15846. Up to 717 conditions per place. [2023-11-29 04:26:13,953 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 231 selfloop transitions, 401 changer transitions 9/644 dead transitions. [2023-11-29 04:26:13,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 644 transitions, 10749 flow [2023-11-29 04:26:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 04:26:13,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-29 04:26:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 351 transitions. [2023-11-29 04:26:13,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2023-11-29 04:26:13,955 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 351 transitions. [2023-11-29 04:26:13,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 351 transitions. [2023-11-29 04:26:13,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:26:13,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 351 transitions. [2023-11-29 04:26:13,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 9.75) internal successors, (351), 36 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:26:13,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 21.0) internal successors, (777), 37 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:26:13,957 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 21.0) internal successors, (777), 37 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:26:13,958 INFO L175 Difference]: Start difference. First operand has 286 places, 515 transitions, 8296 flow. Second operand 36 states and 351 transitions. [2023-11-29 04:26:13,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 644 transitions, 10749 flow [2023-11-29 04:26:14,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 644 transitions, 10407 flow, removed 137 selfloop flow, removed 17 redundant places. [2023-11-29 04:26:14,175 INFO L231 Difference]: Finished difference. Result has 308 places, 568 transitions, 9821 flow [2023-11-29 04:26:14,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7964, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=9821, PETRI_PLACES=308, PETRI_TRANSITIONS=568} [2023-11-29 04:26:14,176 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 286 predicate places. [2023-11-29 04:26:14,176 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 568 transitions, 9821 flow [2023-11-29 04:26:14,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.814814814814815) internal successors, (184), 27 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 04:26:14,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:26:14,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:26:14,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 04:26:14,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:26:14,377 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:26:14,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:26:14,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1192157532, now seen corresponding path program 23 times [2023-11-29 04:26:14,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:26:14,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728735265] [2023-11-29 04:26:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:26:14,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:26:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:26:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:26:20,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:26:20,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728735265] [2023-11-29 04:26:20,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728735265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:26:20,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604268805] [2023-11-29 04:26:20,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:26:20,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:26:20,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:26:20,033 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:26:20,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 04:26:20,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:26:20,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:26:20,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 04:26:20,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:26:20,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:26:20,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 144 [2023-11-29 04:26:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:26:21,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:26:22,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:26:22,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 947 treesize of output 423 [2023-11-29 04:26:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:26:37,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604268805] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:26:37,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:26:37,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2023-11-29 04:26:37,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079495788] [2023-11-29 04:26:37,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:26:37,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 04:26:37,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:26:37,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 04:26:37,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2023-11-29 04:26:37,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:26:37,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 568 transitions, 9821 flow. Second operand has 25 states, 25 states have (on average 6.76) internal successors, (169), 25 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:26:37,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:26:37,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:26:37,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:26:40,028 INFO L124 PetriNetUnfolderBase]: 1194/2141 cut-off events. [2023-11-29 04:26:40,028 INFO L125 PetriNetUnfolderBase]: For 18306/18306 co-relation queries the response was YES. [2023-11-29 04:26:40,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17318 conditions, 2141 events. 1194/2141 cut-off events. For 18306/18306 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 12653 event pairs, 104 based on Foata normal form. 2/2130 useless extension candidates. Maximal degree in co-relation 17210. Up to 1963 conditions per place. [2023-11-29 04:26:40,052 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 526 selfloop transitions, 84 changer transitions 7/620 dead transitions. [2023-11-29 04:26:40,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 620 transitions, 11618 flow [2023-11-29 04:26:40,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 04:26:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 04:26:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 226 transitions. [2023-11-29 04:26:40,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139194139194139 [2023-11-29 04:26:40,054 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 226 transitions. [2023-11-29 04:26:40,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 226 transitions. [2023-11-29 04:26:40,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:26:40,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 226 transitions. [2023-11-29 04:26:40,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 8.692307692307692) internal successors, (226), 26 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:26:40,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 21.0) internal successors, (567), 27 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:26:40,056 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 21.0) internal successors, (567), 27 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:26:40,056 INFO L175 Difference]: Start difference. First operand has 308 places, 568 transitions, 9821 flow. Second operand 26 states and 226 transitions. [2023-11-29 04:26:40,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 620 transitions, 11618 flow [2023-11-29 04:26:40,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 620 transitions, 11199 flow, removed 112 selfloop flow, removed 18 redundant places. [2023-11-29 04:26:40,265 INFO L231 Difference]: Finished difference. Result has 321 places, 585 transitions, 10045 flow [2023-11-29 04:26:40,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=9409, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10045, PETRI_PLACES=321, PETRI_TRANSITIONS=585} [2023-11-29 04:26:40,266 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 299 predicate places. [2023-11-29 04:26:40,266 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 585 transitions, 10045 flow [2023-11-29 04:26:40,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.76) internal successors, (169), 25 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:26:40,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:26:40,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:26:40,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 04:26:40,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 04:26:40,467 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:26:40,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:26:40,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1903388410, now seen corresponding path program 24 times [2023-11-29 04:26:40,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:26:40,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835042729] [2023-11-29 04:26:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:26:40,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:26:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:26:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:26:42,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:26:42,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835042729] [2023-11-29 04:26:42,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835042729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:26:42,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038871797] [2023-11-29 04:26:42,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:26:42,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:26:42,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:26:42,690 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:26:42,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 04:26:42,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 04:26:42,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:26:42,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 04:26:42,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:26:42,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:26:42,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:26:43,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:26:43,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 165 [2023-11-29 04:26:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:26:43,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:26:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:26:52,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038871797] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:26:52,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:26:52,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2023-11-29 04:26:52,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192913353] [2023-11-29 04:26:52,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:26:52,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 04:26:52,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:26:52,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 04:26:52,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-11-29 04:26:52,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:26:52,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 585 transitions, 10045 flow. Second operand has 25 states, 25 states have (on average 6.72) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:26:52,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:26:52,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:26:52,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:27:00,380 INFO L124 PetriNetUnfolderBase]: 1289/2278 cut-off events. [2023-11-29 04:27:00,380 INFO L125 PetriNetUnfolderBase]: For 20152/20152 co-relation queries the response was YES. [2023-11-29 04:27:00,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18536 conditions, 2278 events. 1289/2278 cut-off events. For 20152/20152 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 13344 event pairs, 0 based on Foata normal form. 2/2273 useless extension candidates. Maximal degree in co-relation 18421. Up to 1261 conditions per place. [2023-11-29 04:27:00,408 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 362 selfloop transitions, 330 changer transitions 7/702 dead transitions. [2023-11-29 04:27:00,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 702 transitions, 12901 flow [2023-11-29 04:27:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 04:27:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 04:27:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 343 transitions. [2023-11-29 04:27:00,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44144144144144143 [2023-11-29 04:27:00,409 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 343 transitions. [2023-11-29 04:27:00,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 343 transitions. [2023-11-29 04:27:00,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:27:00,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 343 transitions. [2023-11-29 04:27:00,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 9.27027027027027) internal successors, (343), 37 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:00,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 21.0) internal successors, (798), 38 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:00,412 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 21.0) internal successors, (798), 38 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:00,412 INFO L175 Difference]: Start difference. First operand has 321 places, 585 transitions, 10045 flow. Second operand 37 states and 343 transitions. [2023-11-29 04:27:00,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 702 transitions, 12901 flow [2023-11-29 04:27:00,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 702 transitions, 12503 flow, removed 164 selfloop flow, removed 16 redundant places. [2023-11-29 04:27:00,815 INFO L231 Difference]: Finished difference. Result has 348 places, 642 transitions, 11736 flow [2023-11-29 04:27:00,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=9661, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=11736, PETRI_PLACES=348, PETRI_TRANSITIONS=642} [2023-11-29 04:27:00,816 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 326 predicate places. [2023-11-29 04:27:00,816 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 642 transitions, 11736 flow [2023-11-29 04:27:00,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.72) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:00,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:27:00,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:27:00,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 04:27:01,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 04:27:01,017 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:27:01,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:01,017 INFO L85 PathProgramCache]: Analyzing trace with hash -35699888, now seen corresponding path program 25 times [2023-11-29 04:27:01,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:01,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413053298] [2023-11-29 04:27:01,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:01,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:27:02,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:02,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413053298] [2023-11-29 04:27:02,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413053298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:27:02,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348423910] [2023-11-29 04:27:02,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:27:02,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:02,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:02,449 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:02,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 04:27:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:02,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 04:27:02,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:03,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:27:03,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 234 treesize of output 146 [2023-11-29 04:27:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:27:03,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:27:05,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:27:05,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 947 treesize of output 423 [2023-11-29 04:27:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:27:20,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348423910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:27:20,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:27:20,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2023-11-29 04:27:20,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174456329] [2023-11-29 04:27:20,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:27:20,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 04:27:20,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:20,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 04:27:20,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2023-11-29 04:27:20,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:27:20,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 642 transitions, 11736 flow. Second operand has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:20,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:27:20,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:27:20,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:27:23,049 INFO L124 PetriNetUnfolderBase]: 1304/2307 cut-off events. [2023-11-29 04:27:23,050 INFO L125 PetriNetUnfolderBase]: For 23055/23055 co-relation queries the response was YES. [2023-11-29 04:27:23,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19663 conditions, 2307 events. 1304/2307 cut-off events. For 23055/23055 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 13597 event pairs, 104 based on Foata normal form. 2/2300 useless extension candidates. Maximal degree in co-relation 19541. Up to 2154 conditions per place. [2023-11-29 04:27:23,078 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 604 selfloop transitions, 72 changer transitions 8/687 dead transitions. [2023-11-29 04:27:23,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 687 transitions, 13564 flow [2023-11-29 04:27:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 04:27:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 04:27:23,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 213 transitions. [2023-11-29 04:27:23,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057142857142857 [2023-11-29 04:27:23,079 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 213 transitions. [2023-11-29 04:27:23,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 213 transitions. [2023-11-29 04:27:23,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:27:23,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 213 transitions. [2023-11-29 04:27:23,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 8.52) internal successors, (213), 25 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:23,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:23,081 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:23,081 INFO L175 Difference]: Start difference. First operand has 348 places, 642 transitions, 11736 flow. Second operand 25 states and 213 transitions. [2023-11-29 04:27:23,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 687 transitions, 13564 flow [2023-11-29 04:27:23,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 687 transitions, 12911 flow, removed 191 selfloop flow, removed 20 redundant places. [2023-11-29 04:27:23,375 INFO L231 Difference]: Finished difference. Result has 356 places, 654 transitions, 11579 flow [2023-11-29 04:27:23,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11089, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11579, PETRI_PLACES=356, PETRI_TRANSITIONS=654} [2023-11-29 04:27:23,376 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 334 predicate places. [2023-11-29 04:27:23,376 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 654 transitions, 11579 flow [2023-11-29 04:27:23,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:23,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:27:23,377 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:27:23,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 04:27:23,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:23,577 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:27:23,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:23,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1429163370, now seen corresponding path program 26 times [2023-11-29 04:27:23,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:23,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570056898] [2023-11-29 04:27:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:23,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:27:24,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:24,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570056898] [2023-11-29 04:27:24,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570056898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:27:24,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892244181] [2023-11-29 04:27:24,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:27:24,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:24,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:24,497 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:24,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 04:27:24,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:27:24,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:27:24,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 04:27:24,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:25,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:27:25,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 234 treesize of output 146 [2023-11-29 04:27:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:27:25,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:27:27,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:27:27,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 978 treesize of output 434 [2023-11-29 04:27:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:27:41,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892244181] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:27:41,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:27:41,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2023-11-29 04:27:41,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087270173] [2023-11-29 04:27:41,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:27:41,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:27:41,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:41,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:27:41,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:27:41,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:27:41,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 654 transitions, 11579 flow. Second operand has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:41,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:27:41,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:27:41,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:27:43,948 INFO L124 PetriNetUnfolderBase]: 1324/2343 cut-off events. [2023-11-29 04:27:43,948 INFO L125 PetriNetUnfolderBase]: For 23502/23502 co-relation queries the response was YES. [2023-11-29 04:27:43,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19595 conditions, 2343 events. 1324/2343 cut-off events. For 23502/23502 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 13960 event pairs, 104 based on Foata normal form. 2/2336 useless extension candidates. Maximal degree in co-relation 19470. Up to 2188 conditions per place. [2023-11-29 04:27:43,976 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 612 selfloop transitions, 75 changer transitions 8/698 dead transitions. [2023-11-29 04:27:43,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 698 transitions, 13502 flow [2023-11-29 04:27:43,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 04:27:43,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 04:27:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 176 transitions. [2023-11-29 04:27:43,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2023-11-29 04:27:43,977 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 176 transitions. [2023-11-29 04:27:43,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 176 transitions. [2023-11-29 04:27:43,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:27:43,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 176 transitions. [2023-11-29 04:27:43,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:43,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 21.0) internal successors, (441), 21 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:43,978 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 21.0) internal successors, (441), 21 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:43,978 INFO L175 Difference]: Start difference. First operand has 356 places, 654 transitions, 11579 flow. Second operand 20 states and 176 transitions. [2023-11-29 04:27:43,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 698 transitions, 13502 flow [2023-11-29 04:27:44,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 698 transitions, 13222 flow, removed 91 selfloop flow, removed 19 redundant places. [2023-11-29 04:27:44,275 INFO L231 Difference]: Finished difference. Result has 361 places, 668 transitions, 11891 flow [2023-11-29 04:27:44,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11299, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11891, PETRI_PLACES=361, PETRI_TRANSITIONS=668} [2023-11-29 04:27:44,276 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 339 predicate places. [2023-11-29 04:27:44,276 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 668 transitions, 11891 flow [2023-11-29 04:27:44,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:44,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:27:44,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:27:44,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 04:27:44,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:44,477 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:27:44,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1716883006, now seen corresponding path program 27 times [2023-11-29 04:27:44,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:44,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993770858] [2023-11-29 04:27:44,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:44,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:27:45,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:45,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993770858] [2023-11-29 04:27:45,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993770858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:27:45,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433427158] [2023-11-29 04:27:45,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:27:45,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:45,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:45,607 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:45,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 04:27:45,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 04:27:45,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:27:45,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 04:27:45,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:45,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:27:46,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:27:46,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 163 [2023-11-29 04:27:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:27:46,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:27:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:27:55,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433427158] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:27:55,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:27:55,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2023-11-29 04:27:55,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170560901] [2023-11-29 04:27:55,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:27:55,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:27:55,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:55,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:27:55,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:27:55,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:27:55,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 668 transitions, 11891 flow. Second operand has 26 states, 26 states have (on average 6.769230769230769) internal successors, (176), 26 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:55,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:27:55,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:27:55,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:27:58,068 INFO L124 PetriNetUnfolderBase]: 1372/2415 cut-off events. [2023-11-29 04:27:58,068 INFO L125 PetriNetUnfolderBase]: For 25866/25866 co-relation queries the response was YES. [2023-11-29 04:27:58,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20425 conditions, 2415 events. 1372/2415 cut-off events. For 25866/25866 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 14364 event pairs, 104 based on Foata normal form. 2/2408 useless extension candidates. Maximal degree in co-relation 20294. Up to 2231 conditions per place. [2023-11-29 04:27:58,098 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 610 selfloop transitions, 105 changer transitions 8/726 dead transitions. [2023-11-29 04:27:58,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 726 transitions, 14021 flow [2023-11-29 04:27:58,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 04:27:58,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 04:27:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 234 transitions. [2023-11-29 04:27:58,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-29 04:27:58,099 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 234 transitions. [2023-11-29 04:27:58,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 234 transitions. [2023-11-29 04:27:58,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:27:58,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 234 transitions. [2023-11-29 04:27:58,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 9.0) internal successors, (234), 26 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:58,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 21.0) internal successors, (567), 27 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:58,101 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 21.0) internal successors, (567), 27 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:58,101 INFO L175 Difference]: Start difference. First operand has 361 places, 668 transitions, 11891 flow. Second operand 26 states and 234 transitions. [2023-11-29 04:27:58,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 726 transitions, 14021 flow [2023-11-29 04:27:58,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 726 transitions, 13796 flow, removed 92 selfloop flow, removed 12 redundant places. [2023-11-29 04:27:58,429 INFO L231 Difference]: Finished difference. Result has 378 places, 688 transitions, 12482 flow [2023-11-29 04:27:58,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11666, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=12482, PETRI_PLACES=378, PETRI_TRANSITIONS=688} [2023-11-29 04:27:58,430 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 356 predicate places. [2023-11-29 04:27:58,430 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 688 transitions, 12482 flow [2023-11-29 04:27:58,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.769230769230769) internal successors, (176), 26 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:27:58,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:27:58,430 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:27:58,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 04:27:58,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 04:27:58,631 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:27:58,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:58,631 INFO L85 PathProgramCache]: Analyzing trace with hash 2146738960, now seen corresponding path program 28 times [2023-11-29 04:27:58,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:58,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250303047] [2023-11-29 04:27:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:58,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:27:59,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:59,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250303047] [2023-11-29 04:27:59,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250303047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:27:59,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722308535] [2023-11-29 04:27:59,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:27:59,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:59,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:59,603 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:59,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 04:27:59,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:27:59,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:27:59,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 04:27:59,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:59,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 04:28:00,585 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:28:00,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 139 [2023-11-29 04:28:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:28:00,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:28:10,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722308535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:28:10,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:28:10,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 26 [2023-11-29 04:28:10,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384194889] [2023-11-29 04:28:10,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:10,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:28:10,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:10,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:28:10,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:28:10,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:28:10,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 688 transitions, 12482 flow. Second operand has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 26 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:10,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:28:10,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:28:10,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:28:28,546 INFO L124 PetriNetUnfolderBase]: 1527/2689 cut-off events. [2023-11-29 04:28:28,546 INFO L125 PetriNetUnfolderBase]: For 30882/30882 co-relation queries the response was YES. [2023-11-29 04:28:28,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23226 conditions, 2689 events. 1527/2689 cut-off events. For 30882/30882 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 16287 event pairs, 0 based on Foata normal form. 5/2685 useless extension candidates. Maximal degree in co-relation 23090. Up to 871 conditions per place. [2023-11-29 04:28:28,582 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 273 selfloop transitions, 551 changer transitions 13/840 dead transitions. [2023-11-29 04:28:28,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 840 transitions, 16083 flow [2023-11-29 04:28:28,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 04:28:28,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-29 04:28:28,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 374 transitions. [2023-11-29 04:28:28,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665445665445664 [2023-11-29 04:28:28,584 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 374 transitions. [2023-11-29 04:28:28,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 374 transitions. [2023-11-29 04:28:28,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:28:28,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 374 transitions. [2023-11-29 04:28:28,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 9.58974358974359) internal successors, (374), 39 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:28,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 21.0) internal successors, (840), 40 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:28,586 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 21.0) internal successors, (840), 40 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:28,586 INFO L175 Difference]: Start difference. First operand has 378 places, 688 transitions, 12482 flow. Second operand 39 states and 374 transitions. [2023-11-29 04:28:28,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 840 transitions, 16083 flow [2023-11-29 04:28:28,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 840 transitions, 15688 flow, removed 150 selfloop flow, removed 19 redundant places. [2023-11-29 04:28:28,987 INFO L231 Difference]: Finished difference. Result has 402 places, 754 transitions, 15201 flow [2023-11-29 04:28:28,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12091, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=15201, PETRI_PLACES=402, PETRI_TRANSITIONS=754} [2023-11-29 04:28:28,988 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 380 predicate places. [2023-11-29 04:28:28,988 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 754 transitions, 15201 flow [2023-11-29 04:28:28,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 26 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:28,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:28:28,989 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:28,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 04:28:29,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 04:28:29,189 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:28:29,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:29,189 INFO L85 PathProgramCache]: Analyzing trace with hash 242568493, now seen corresponding path program 29 times [2023-11-29 04:28:29,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:29,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696608668] [2023-11-29 04:28:29,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:29,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:28:29,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:29,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696608668] [2023-11-29 04:28:29,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696608668] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:28:29,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32155207] [2023-11-29 04:28:29,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:28:29,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:29,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:29,311 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:29,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 04:28:29,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 04:28:29,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:28:29,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:28:29,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:28:29,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:28:29,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32155207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:28:29,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:28:29,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2023-11-29 04:28:29,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130027048] [2023-11-29 04:28:29,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:29,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:28:29,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:29,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:28:29,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:28:29,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:28:29,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 754 transitions, 15201 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:29,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:28:29,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:28:29,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:28:30,694 INFO L124 PetriNetUnfolderBase]: 935/1893 cut-off events. [2023-11-29 04:28:30,694 INFO L125 PetriNetUnfolderBase]: For 34336/34336 co-relation queries the response was YES. [2023-11-29 04:28:30,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17494 conditions, 1893 events. 935/1893 cut-off events. For 34336/34336 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 12408 event pairs, 18 based on Foata normal form. 234/2120 useless extension candidates. Maximal degree in co-relation 17371. Up to 559 conditions per place. [2023-11-29 04:28:30,718 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 304 selfloop transitions, 207 changer transitions 62/576 dead transitions. [2023-11-29 04:28:30,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 576 transitions, 12336 flow [2023-11-29 04:28:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 04:28:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 04:28:30,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 240 transitions. [2023-11-29 04:28:30,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968944099378882 [2023-11-29 04:28:30,719 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 240 transitions. [2023-11-29 04:28:30,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 240 transitions. [2023-11-29 04:28:30,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:28:30,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 240 transitions. [2023-11-29 04:28:30,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 10.434782608695652) internal successors, (240), 23 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:30,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 21.0) internal successors, (504), 24 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:30,720 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 21.0) internal successors, (504), 24 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:30,720 INFO L175 Difference]: Start difference. First operand has 402 places, 754 transitions, 15201 flow. Second operand 23 states and 240 transitions. [2023-11-29 04:28:30,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 576 transitions, 12336 flow [2023-11-29 04:28:30,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 576 transitions, 11025 flow, removed 353 selfloop flow, removed 47 redundant places. [2023-11-29 04:28:30,991 INFO L231 Difference]: Finished difference. Result has 364 places, 448 transitions, 8958 flow [2023-11-29 04:28:30,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8368, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8958, PETRI_PLACES=364, PETRI_TRANSITIONS=448} [2023-11-29 04:28:30,991 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 342 predicate places. [2023-11-29 04:28:30,991 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 448 transitions, 8958 flow [2023-11-29 04:28:30,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:30,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:28:30,992 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:30,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 04:28:31,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 04:28:31,192 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:28:31,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:31,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1460542652, now seen corresponding path program 30 times [2023-11-29 04:28:31,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:31,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237792979] [2023-11-29 04:28:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:31,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:28:31,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:31,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237792979] [2023-11-29 04:28:31,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237792979] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:28:31,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441012371] [2023-11-29 04:28:31,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:28:31,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:31,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:31,306 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:31,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 04:28:31,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 04:28:31,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:28:31,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:28:31,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:28:31,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:28:31,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441012371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:28:31,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:28:31,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-29 04:28:31,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685166914] [2023-11-29 04:28:31,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:31,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:28:31,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:31,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:28:31,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:28:31,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:28:31,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 448 transitions, 8958 flow. Second operand has 17 states, 17 states have (on average 6.9411764705882355) internal successors, (118), 17 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:31,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:28:31,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:28:31,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:28:32,128 INFO L124 PetriNetUnfolderBase]: 573/1097 cut-off events. [2023-11-29 04:28:32,128 INFO L125 PetriNetUnfolderBase]: For 21179/21179 co-relation queries the response was YES. [2023-11-29 04:28:32,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10425 conditions, 1097 events. 573/1097 cut-off events. For 21179/21179 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5758 event pairs, 152 based on Foata normal form. 42/1138 useless extension candidates. Maximal degree in co-relation 10313. Up to 545 conditions per place. [2023-11-29 04:28:32,141 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 248 selfloop transitions, 40 changer transitions 44/335 dead transitions. [2023-11-29 04:28:32,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 335 transitions, 7309 flow [2023-11-29 04:28:32,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:28:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 04:28:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2023-11-29 04:28:32,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2023-11-29 04:28:32,142 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 88 transitions. [2023-11-29 04:28:32,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 88 transitions. [2023-11-29 04:28:32,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:28:32,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 88 transitions. [2023-11-29 04:28:32,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:32,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:32,143 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:32,143 INFO L175 Difference]: Start difference. First operand has 364 places, 448 transitions, 8958 flow. Second operand 9 states and 88 transitions. [2023-11-29 04:28:32,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 335 transitions, 7309 flow [2023-11-29 04:28:32,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 335 transitions, 6373 flow, removed 277 selfloop flow, removed 56 redundant places. [2023-11-29 04:28:32,284 INFO L231 Difference]: Finished difference. Result has 261 places, 286 transitions, 5105 flow [2023-11-29 04:28:32,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5610, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5105, PETRI_PLACES=261, PETRI_TRANSITIONS=286} [2023-11-29 04:28:32,284 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 239 predicate places. [2023-11-29 04:28:32,284 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 286 transitions, 5105 flow [2023-11-29 04:28:32,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.9411764705882355) internal successors, (118), 17 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:32,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:28:32,284 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:32,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 04:28:32,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 04:28:32,485 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:28:32,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:32,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1441898655, now seen corresponding path program 31 times [2023-11-29 04:28:32,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:32,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066883452] [2023-11-29 04:28:32,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:32,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:28:32,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:32,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066883452] [2023-11-29 04:28:32,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066883452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:28:32,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343606063] [2023-11-29 04:28:32,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:28:32,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:32,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:32,619 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:32,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 04:28:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:32,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:28:32,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:28:32,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:28:32,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343606063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:28:32,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:28:32,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 04:28:32,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162502496] [2023-11-29 04:28:32,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:32,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:28:32,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:32,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:28:32,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:28:32,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:28:32,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 286 transitions, 5105 flow. Second operand has 19 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:32,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:28:32,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:28:32,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:28:33,335 INFO L124 PetriNetUnfolderBase]: 533/987 cut-off events. [2023-11-29 04:28:33,335 INFO L125 PetriNetUnfolderBase]: For 17999/17999 co-relation queries the response was YES. [2023-11-29 04:28:33,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8469 conditions, 987 events. 533/987 cut-off events. For 17999/17999 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5007 event pairs, 43 based on Foata normal form. 44/1030 useless extension candidates. Maximal degree in co-relation 8383. Up to 686 conditions per place. [2023-11-29 04:28:33,347 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 227 selfloop transitions, 76 changer transitions 0/306 dead transitions. [2023-11-29 04:28:33,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 306 transitions, 6109 flow [2023-11-29 04:28:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:28:33,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 04:28:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 87 transitions. [2023-11-29 04:28:33,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2023-11-29 04:28:33,348 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 87 transitions. [2023-11-29 04:28:33,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 87 transitions. [2023-11-29 04:28:33,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:28:33,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 87 transitions. [2023-11-29 04:28:33,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:33,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 21.0) internal successors, (231), 11 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:33,348 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 21.0) internal successors, (231), 11 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:33,348 INFO L175 Difference]: Start difference. First operand has 261 places, 286 transitions, 5105 flow. Second operand 10 states and 87 transitions. [2023-11-29 04:28:33,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 306 transitions, 6109 flow [2023-11-29 04:28:33,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 306 transitions, 5802 flow, removed 31 selfloop flow, removed 15 redundant places. [2023-11-29 04:28:33,442 INFO L231 Difference]: Finished difference. Result has 220 places, 281 transitions, 4994 flow [2023-11-29 04:28:33,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4496, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4994, PETRI_PLACES=220, PETRI_TRANSITIONS=281} [2023-11-29 04:28:33,443 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 198 predicate places. [2023-11-29 04:28:33,443 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 281 transitions, 4994 flow [2023-11-29 04:28:33,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:33,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:28:33,443 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:33,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-29 04:28:33,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 04:28:33,644 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:28:33,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:33,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1751045325, now seen corresponding path program 32 times [2023-11-29 04:28:33,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:33,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635317113] [2023-11-29 04:28:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:33,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:28:33,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:33,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635317113] [2023-11-29 04:28:33,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635317113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:28:33,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442461943] [2023-11-29 04:28:33,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:28:33,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:33,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:33,772 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:33,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 04:28:33,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:28:33,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:28:33,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:28:33,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:28:33,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:28:34,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442461943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:28:34,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:28:34,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 04:28:34,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036130418] [2023-11-29 04:28:34,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:34,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:28:34,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:34,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:28:34,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:28:34,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:28:34,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 281 transitions, 4994 flow. Second operand has 19 states, 19 states have (on average 7.052631578947368) internal successors, (134), 19 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 04:28:34,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:28:34,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:28:34,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:28:34,472 INFO L124 PetriNetUnfolderBase]: 511/976 cut-off events. [2023-11-29 04:28:34,472 INFO L125 PetriNetUnfolderBase]: For 14406/14406 co-relation queries the response was YES. [2023-11-29 04:28:34,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8098 conditions, 976 events. 511/976 cut-off events. For 14406/14406 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5021 event pairs, 25 based on Foata normal form. 78/1053 useless extension candidates. Maximal degree in co-relation 8016. Up to 629 conditions per place. [2023-11-29 04:28:34,483 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 214 selfloop transitions, 63 changer transitions 2/282 dead transitions. [2023-11-29 04:28:34,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 282 transitions, 5597 flow [2023-11-29 04:28:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:28:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 04:28:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 87 transitions. [2023-11-29 04:28:34,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2023-11-29 04:28:34,484 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 87 transitions. [2023-11-29 04:28:34,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 87 transitions. [2023-11-29 04:28:34,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:28:34,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 87 transitions. [2023-11-29 04:28:34,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:34,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 21.0) internal successors, (231), 11 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:34,485 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 21.0) internal successors, (231), 11 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:28:34,485 INFO L175 Difference]: Start difference. First operand has 220 places, 281 transitions, 4994 flow. Second operand 10 states and 87 transitions. [2023-11-29 04:28:34,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 282 transitions, 5597 flow [2023-11-29 04:28:34,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 282 transitions, 5370 flow, removed 58 selfloop flow, removed 20 redundant places. [2023-11-29 04:28:34,563 INFO L231 Difference]: Finished difference. Result has 194 places, 255 transitions, 4514 flow [2023-11-29 04:28:34,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4173, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4514, PETRI_PLACES=194, PETRI_TRANSITIONS=255} [2023-11-29 04:28:34,563 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 172 predicate places. [2023-11-29 04:28:34,563 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 255 transitions, 4514 flow [2023-11-29 04:28:34,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.052631578947368) internal successors, (134), 19 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 04:28:34,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:28:34,564 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:34,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 04:28:34,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 04:28:34,764 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:28:34,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:34,764 INFO L85 PathProgramCache]: Analyzing trace with hash -704505296, now seen corresponding path program 33 times [2023-11-29 04:28:34,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:34,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628671672] [2023-11-29 04:28:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:34,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:28:37,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:37,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628671672] [2023-11-29 04:28:37,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628671672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:28:37,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418069839] [2023-11-29 04:28:37,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:28:37,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:37,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:37,752 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:37,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 04:28:38,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 04:28:38,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:28:38,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 04:28:38,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:41,322 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:28:41,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 443 treesize of output 263 [2023-11-29 04:28:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:28:43,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:29:07,157 INFO L349 Elim1Store]: treesize reduction 20, result has 74.0 percent of original size [2023-11-29 04:29:07,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 4794 treesize of output 1558 [2023-11-29 04:31:34,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2023-11-29 04:31:34,312 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-11-29 04:31:34,313 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-11-29 04:31:34,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 04:31:34,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 04:31:34,514 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:268) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:410) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:394) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:500) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2023-11-29 04:31:34,517 INFO L158 Benchmark]: Toolchain (without parser) took 649048.50ms. Allocated memory was 155.2MB in the beginning and 813.7MB in the end (delta: 658.5MB). Free memory was 119.6MB in the beginning and 649.0MB in the end (delta: -529.4MB). Peak memory consumption was 540.1MB. Max. memory is 16.1GB. [2023-11-29 04:31:34,518 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 155.2MB. Free memory is still 130.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 04:31:34,518 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.12ms. Allocated memory is still 155.2MB. Free memory was 119.6MB in the beginning and 107.5MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 04:31:34,518 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.37ms. Allocated memory is still 155.2MB. Free memory was 107.5MB in the beginning and 104.5MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 04:31:34,518 INFO L158 Benchmark]: Boogie Preprocessor took 62.35ms. Allocated memory is still 155.2MB. Free memory was 104.5MB in the beginning and 101.2MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 04:31:34,518 INFO L158 Benchmark]: RCFGBuilder took 1127.83ms. Allocated memory was 155.2MB in the beginning and 224.4MB in the end (delta: 69.2MB). Free memory was 101.2MB in the beginning and 113.3MB in the end (delta: -12.1MB). Peak memory consumption was 66.6MB. Max. memory is 16.1GB. [2023-11-29 04:31:34,519 INFO L158 Benchmark]: TraceAbstraction took 647543.24ms. Allocated memory was 224.4MB in the beginning and 813.7MB in the end (delta: 589.3MB). Free memory was 112.2MB in the beginning and 649.0MB in the end (delta: -536.8MB). Peak memory consumption was 463.0MB. Max. memory is 16.1GB. [2023-11-29 04:31:34,520 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 155.2MB. Free memory is still 130.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 270.12ms. Allocated memory is still 155.2MB. Free memory was 119.6MB in the beginning and 107.5MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.37ms. Allocated memory is still 155.2MB. Free memory was 107.5MB in the beginning and 104.5MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.35ms. Allocated memory is still 155.2MB. Free memory was 104.5MB in the beginning and 101.2MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1127.83ms. Allocated memory was 155.2MB in the beginning and 224.4MB in the end (delta: 69.2MB). Free memory was 101.2MB in the beginning and 113.3MB in the end (delta: -12.1MB). Peak memory consumption was 66.6MB. Max. memory is 16.1GB. * TraceAbstraction took 647543.24ms. Allocated memory was 224.4MB in the beginning and 813.7MB in the end (delta: 589.3MB). Free memory was 112.2MB in the beginning and 649.0MB in the end (delta: -536.8MB). Peak memory consumption was 463.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/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_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/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 faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:31:36,208 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:31:36,277 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-29 04:31:36,291 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:31:36,291 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:31:36,321 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:31:36,322 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:31:36,322 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:31:36,323 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:31:36,324 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:31:36,324 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:31:36,325 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:31:36,326 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:31:36,326 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:31:36,327 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:31:36,328 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:31:36,328 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:31:36,329 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:31:36,330 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:31:36,330 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:31:36,331 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:31:36,331 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:31:36,332 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:31:36,332 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 04:31:36,333 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 04:31:36,333 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 04:31:36,334 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:31:36,334 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:31:36,334 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:31:36,335 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:31:36,335 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:31:36,336 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:31:36,336 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:31:36,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:31:36,337 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:31:36,337 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:31:36,337 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:31:36,337 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 04:31:36,338 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 04:31:36,338 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:31:36,338 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:31:36,338 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:31:36,338 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:31:36,339 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:31:36,339 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 04:31:36,339 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_4c91232b-66ed-41e9-83b7-94885334aa9a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2023-11-29 04:31:36,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:31:36,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:31:36,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:31:36,637 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:31:36,638 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:31:36,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-29 04:31:39,422 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:31:39,596 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:31:39,597 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-29 04:31:39,606 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/data/9cad8e7b1/76462a556f6b46709d39f780ca4fef1a/FLAGac38c12d9 [2023-11-29 04:31:39,620 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/data/9cad8e7b1/76462a556f6b46709d39f780ca4fef1a [2023-11-29 04:31:39,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:31:39,625 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:31:39,626 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:31:39,626 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:31:39,631 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:31:39,632 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:31:39" (1/1) ... [2023-11-29 04:31:39,633 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f9bb690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:31:39, skipping insertion in model container [2023-11-29 04:31:39,633 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:31:39" (1/1) ... [2023-11-29 04:31:39,660 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:31:39,862 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_4c91232b-66ed-41e9-83b7-94885334aa9a/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2781,2794] [2023-11-29 04:31:39,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:31:39,890 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 04:31:39,896 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:31:39,911 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_4c91232b-66ed-41e9-83b7-94885334aa9a/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2781,2794] [2023-11-29 04:31:39,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:31:39,922 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:31:39,945 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_4c91232b-66ed-41e9-83b7-94885334aa9a/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2781,2794] [2023-11-29 04:31:39,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:31:39,968 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:31:39,968 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:31:39 WrapperNode [2023-11-29 04:31:39,968 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:31:39,969 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:31:39,970 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:31:39,970 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:31:39,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:31:39" (1/1) ... [2023-11-29 04:31:39,989 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:31:39" (1/1) ... [2023-11-29 04:31:40,020 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 271 [2023-11-29 04:31:40,021 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:31:40,022 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:31:40,022 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:31:40,022 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:31:40,034 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:31:39" (1/1) ... [2023-11-29 04:31:40,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:31:39" (1/1) ... [2023-11-29 04:31:40,040 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:31:39" (1/1) ... [2023-11-29 04:31:40,060 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 2, 7, 2]. 54 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 04:31:40,060 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:31:39" (1/1) ... [2023-11-29 04:31:40,061 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:31:39" (1/1) ... [2023-11-29 04:31:40,075 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:31:39" (1/1) ... [2023-11-29 04:31:40,080 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:31:39" (1/1) ... [2023-11-29 04:31:40,083 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:31:39" (1/1) ... [2023-11-29 04:31:40,086 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:31:39" (1/1) ... [2023-11-29 04:31:40,090 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:31:40,092 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:31:40,092 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:31:40,092 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:31:40,093 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:31:39" (1/1) ... [2023-11-29 04:31:40,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:31:40,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:40,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:31:40,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:31:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:31:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 04:31:40,162 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 04:31:40,162 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 04:31:40,162 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 04:31:40,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 04:31:40,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 04:31:40,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 04:31:40,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 04:31:40,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:31:40,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 04:31:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 04:31:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 04:31:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 04:31:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 04:31:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:31:40,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:31:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:31:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 04:31:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 04:31:40,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 04:31:40,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 04:31:40,168 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 04:31:40,300 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:31:40,302 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:31:40,833 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:31:41,262 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:31:41,262 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 04:31:41,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:31:41 BoogieIcfgContainer [2023-11-29 04:31:41,262 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:31:41,265 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:31:41,265 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:31:41,267 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:31:41,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:31:39" (1/3) ... [2023-11-29 04:31:41,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3937d085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:31:41, skipping insertion in model container [2023-11-29 04:31:41,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:31:39" (2/3) ... [2023-11-29 04:31:41,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3937d085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:31:41, skipping insertion in model container [2023-11-29 04:31:41,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:31:41" (3/3) ... [2023-11-29 04:31:41,270 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2023-11-29 04:31:41,277 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 04:31:41,285 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:31:41,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:31:41,285 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 04:31:41,326 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 04:31:41,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2023-11-29 04:31:41,376 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-29 04:31:41,376 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 04:31:41,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-29 04:31:41,379 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2023-11-29 04:31:41,382 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2023-11-29 04:31:41,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:31:41,397 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;@17f14306, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:31:41,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 04:31:41,406 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 04:31:41,406 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-29 04:31:41,406 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 04:31:41,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:31:41,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:41,407 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:31:41,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:41,411 INFO L85 PathProgramCache]: Analyzing trace with hash 965699174, now seen corresponding path program 1 times [2023-11-29 04:31:41,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:31:41,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917212246] [2023-11-29 04:31:41,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:41,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:31:41,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:31:41,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:31:41,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 04:31:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:31:41,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:31:41,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:41,859 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:31:41,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:31:41,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917212246] [2023-11-29 04:31:41,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917212246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:31:41,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:31:41,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:31:41,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138825197] [2023-11-29 04:31:41,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:31:41,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:31:41,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:31:41,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:31:41,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:31:41,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:31:41,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:41,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:31:41,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:31:41,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:31:42,310 INFO L124 PetriNetUnfolderBase]: 101/166 cut-off events. [2023-11-29 04:31:42,310 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-29 04:31:42,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 166 events. 101/166 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 485 event pairs, 9 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 267. Up to 111 conditions per place. [2023-11-29 04:31:42,315 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 28 selfloop transitions, 10 changer transitions 1/42 dead transitions. [2023-11-29 04:31:42,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 42 transitions, 189 flow [2023-11-29 04:31:42,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:31:42,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:31:42,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2023-11-29 04:31:42,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2023-11-29 04:31:42,329 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 65 transitions. [2023-11-29 04:31:42,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 65 transitions. [2023-11-29 04:31:42,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:31:42,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 65 transitions. [2023-11-29 04:31:42,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:42,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:42,339 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:42,341 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 5 states and 65 transitions. [2023-11-29 04:31:42,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 42 transitions, 189 flow [2023-11-29 04:31:42,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 42 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 04:31:42,347 INFO L231 Difference]: Finished difference. Result has 25 places, 27 transitions, 103 flow [2023-11-29 04:31:42,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=25, PETRI_TRANSITIONS=27} [2023-11-29 04:31:42,353 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-11-29 04:31:42,353 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 103 flow [2023-11-29 04:31:42,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:42,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:31:42,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:42,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:31:42,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:31:42,555 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:31:42,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:42,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1541588597, now seen corresponding path program 1 times [2023-11-29 04:31:42,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:31:42,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696854017] [2023-11-29 04:31:42,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:42,556 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:31:42,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:31:42,557 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:31:42,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 04:31:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:31:42,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:31:42,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:42,892 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:31:42,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:31:42,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696854017] [2023-11-29 04:31:42,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696854017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:31:42,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:31:42,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:31:42,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841522212] [2023-11-29 04:31:42,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:31:42,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:31:42,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:31:42,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:31:42,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:31:42,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:31:42,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:42,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:31:42,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:31:42,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:31:43,250 INFO L124 PetriNetUnfolderBase]: 92/154 cut-off events. [2023-11-29 04:31:43,250 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-29 04:31:43,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 154 events. 92/154 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 412 event pairs, 6 based on Foata normal form. 6/144 useless extension candidates. Maximal degree in co-relation 225. Up to 124 conditions per place. [2023-11-29 04:31:43,253 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 23 selfloop transitions, 4 changer transitions 10/40 dead transitions. [2023-11-29 04:31:43,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 40 transitions, 219 flow [2023-11-29 04:31:43,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:31:43,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:31:43,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2023-11-29 04:31:43,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2023-11-29 04:31:43,256 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 57 transitions. [2023-11-29 04:31:43,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 57 transitions. [2023-11-29 04:31:43,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:31:43,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 57 transitions. [2023-11-29 04:31:43,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:43,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:43,259 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:43,259 INFO L175 Difference]: Start difference. First operand has 25 places, 27 transitions, 103 flow. Second operand 5 states and 57 transitions. [2023-11-29 04:31:43,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 40 transitions, 219 flow [2023-11-29 04:31:43,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 40 transitions, 215 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-29 04:31:43,263 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 114 flow [2023-11-29 04:31:43,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-11-29 04:31:43,264 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 8 predicate places. [2023-11-29 04:31:43,264 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 114 flow [2023-11-29 04:31:43,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:43,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:31:43,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:43,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 04:31:43,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:31:43,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:31:43,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:43,466 INFO L85 PathProgramCache]: Analyzing trace with hash 107406576, now seen corresponding path program 1 times [2023-11-29 04:31:43,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:31:43,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939073331] [2023-11-29 04:31:43,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:43,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:31:43,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:31:43,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:31:43,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 04:31:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:31:43,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:31:43,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:43,706 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:31:43,707 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:31:43,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939073331] [2023-11-29 04:31:43,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939073331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:31:43,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:31:43,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:31:43,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526061075] [2023-11-29 04:31:43,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:31:43,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:31:43,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:31:43,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:31:43,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:31:43,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:31:43,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:43,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:31:43,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:31:43,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:31:43,945 INFO L124 PetriNetUnfolderBase]: 105/183 cut-off events. [2023-11-29 04:31:43,945 INFO L125 PetriNetUnfolderBase]: For 251/251 co-relation queries the response was YES. [2023-11-29 04:31:43,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 183 events. 105/183 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 513 event pairs, 35 based on Foata normal form. 10/190 useless extension candidates. Maximal degree in co-relation 244. Up to 125 conditions per place. [2023-11-29 04:31:43,948 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 37 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2023-11-29 04:31:43,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 261 flow [2023-11-29 04:31:43,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:31:43,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:31:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 49 transitions. [2023-11-29 04:31:43,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-29 04:31:43,950 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 49 transitions. [2023-11-29 04:31:43,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 49 transitions. [2023-11-29 04:31:43,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:31:43,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 49 transitions. [2023-11-29 04:31:43,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:43,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:43,952 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:43,953 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 114 flow. Second operand 4 states and 49 transitions. [2023-11-29 04:31:43,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 261 flow [2023-11-29 04:31:43,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 240 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-29 04:31:43,956 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 128 flow [2023-11-29 04:31:43,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2023-11-29 04:31:43,957 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 8 predicate places. [2023-11-29 04:31:43,958 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 128 flow [2023-11-29 04:31:43,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:43,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:31:43,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:43,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-29 04:31:44,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:31:44,159 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:31:44,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:44,160 INFO L85 PathProgramCache]: Analyzing trace with hash -477632653, now seen corresponding path program 2 times [2023-11-29 04:31:44,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:31:44,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320263322] [2023-11-29 04:31:44,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:31:44,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:31:44,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:31:44,162 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:31:44,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 04:31:44,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:31:44,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:31:44,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:31:44,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:44,393 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:31:44,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:31:44,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320263322] [2023-11-29 04:31:44,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320263322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:31:44,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:31:44,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:31:44,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92791602] [2023-11-29 04:31:44,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:31:44,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:31:44,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:31:44,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:31:44,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:31:44,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:31:44,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:44,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:31:44,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:31:44,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:31:44,608 INFO L124 PetriNetUnfolderBase]: 79/136 cut-off events. [2023-11-29 04:31:44,608 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2023-11-29 04:31:44,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 136 events. 79/136 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 307 event pairs, 21 based on Foata normal form. 2/135 useless extension candidates. Maximal degree in co-relation 433. Up to 125 conditions per place. [2023-11-29 04:31:44,611 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 23 selfloop transitions, 2 changer transitions 5/33 dead transitions. [2023-11-29 04:31:44,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 198 flow [2023-11-29 04:31:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:31:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:31:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2023-11-29 04:31:44,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-29 04:31:44,614 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 42 transitions. [2023-11-29 04:31:44,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 42 transitions. [2023-11-29 04:31:44,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:31:44,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 42 transitions. [2023-11-29 04:31:44,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:44,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:44,616 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:44,616 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 128 flow. Second operand 4 states and 42 transitions. [2023-11-29 04:31:44,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 198 flow [2023-11-29 04:31:44,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 190 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-29 04:31:44,619 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 117 flow [2023-11-29 04:31:44,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-11-29 04:31:44,621 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2023-11-29 04:31:44,621 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 117 flow [2023-11-29 04:31:44,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:44,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:31:44,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:44,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 04:31:44,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:31:44,823 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:31:44,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:44,823 INFO L85 PathProgramCache]: Analyzing trace with hash -820273305, now seen corresponding path program 1 times [2023-11-29 04:31:44,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:31:44,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414351307] [2023-11-29 04:31:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:44,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:31:44,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:31:44,825 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:31:44,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 04:31:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:31:44,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:31:44,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:31:45,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:31:45,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:31:45,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414351307] [2023-11-29 04:31:45,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414351307] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:45,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:31:45,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-29 04:31:45,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071460484] [2023-11-29 04:31:45,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:45,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:31:45,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:31:45,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:31:45,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:31:45,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:31:45,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 117 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:45,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:31:45,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:31:45,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:31:45,964 INFO L124 PetriNetUnfolderBase]: 181/305 cut-off events. [2023-11-29 04:31:45,964 INFO L125 PetriNetUnfolderBase]: For 378/388 co-relation queries the response was YES. [2023-11-29 04:31:45,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1002 conditions, 305 events. 181/305 cut-off events. For 378/388 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 972 event pairs, 43 based on Foata normal form. 11/310 useless extension candidates. Maximal degree in co-relation 985. Up to 131 conditions per place. [2023-11-29 04:31:45,969 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 61 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2023-11-29 04:31:45,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 78 transitions, 482 flow [2023-11-29 04:31:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:31:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 04:31:45,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2023-11-29 04:31:45,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2023-11-29 04:31:45,972 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 91 transitions. [2023-11-29 04:31:45,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 91 transitions. [2023-11-29 04:31:45,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:31:45,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 91 transitions. [2023-11-29 04:31:45,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:45,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:45,976 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:45,976 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 117 flow. Second operand 8 states and 91 transitions. [2023-11-29 04:31:45,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 78 transitions, 482 flow [2023-11-29 04:31:45,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 78 transitions, 466 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-29 04:31:45,981 INFO L231 Difference]: Finished difference. Result has 36 places, 40 transitions, 231 flow [2023-11-29 04:31:45,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=231, PETRI_PLACES=36, PETRI_TRANSITIONS=40} [2023-11-29 04:31:45,982 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2023-11-29 04:31:45,983 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 40 transitions, 231 flow [2023-11-29 04:31:45,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:45,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:31:45,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:45,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-29 04:31:46,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:31:46,185 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:31:46,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:46,186 INFO L85 PathProgramCache]: Analyzing trace with hash -536713298, now seen corresponding path program 1 times [2023-11-29 04:31:46,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:31:46,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636590558] [2023-11-29 04:31:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:46,186 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:31:46,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:31:46,188 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:31:46,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-29 04:31:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:31:46,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:31:46,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:46,476 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 04:31:46,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:46,595 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 04:31:46,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:31:46,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636590558] [2023-11-29 04:31:46,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636590558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:46,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:31:46,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-29 04:31:46,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561173631] [2023-11-29 04:31:46,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:46,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:31:46,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:31:46,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:31:46,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:31:46,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2023-11-29 04:31:46,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 40 transitions, 231 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 04:31:46,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:31:46,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2023-11-29 04:31:46,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:31:47,218 INFO L124 PetriNetUnfolderBase]: 179/303 cut-off events. [2023-11-29 04:31:47,218 INFO L125 PetriNetUnfolderBase]: For 551/551 co-relation queries the response was YES. [2023-11-29 04:31:47,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1146 conditions, 303 events. 179/303 cut-off events. For 551/551 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 946 event pairs, 31 based on Foata normal form. 12/310 useless extension candidates. Maximal degree in co-relation 629. Up to 133 conditions per place. [2023-11-29 04:31:47,222 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 60 selfloop transitions, 14 changer transitions 0/77 dead transitions. [2023-11-29 04:31:47,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 77 transitions, 560 flow [2023-11-29 04:31:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:31:47,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 04:31:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2023-11-29 04:31:47,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2023-11-29 04:31:47,224 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 89 transitions. [2023-11-29 04:31:47,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 89 transitions. [2023-11-29 04:31:47,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:31:47,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 89 transitions. [2023-11-29 04:31:47,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 11.125) internal successors, (89), 8 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 04:31:47,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:47,226 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:47,227 INFO L175 Difference]: Start difference. First operand has 36 places, 40 transitions, 231 flow. Second operand 8 states and 89 transitions. [2023-11-29 04:31:47,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 77 transitions, 560 flow [2023-11-29 04:31:47,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 77 transitions, 536 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-29 04:31:47,231 INFO L231 Difference]: Finished difference. Result has 43 places, 46 transitions, 288 flow [2023-11-29 04:31:47,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=288, PETRI_PLACES=43, PETRI_TRANSITIONS=46} [2023-11-29 04:31:47,232 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2023-11-29 04:31:47,232 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 46 transitions, 288 flow [2023-11-29 04:31:47,233 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 04:31:47,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:31:47,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:47,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 04:31:47,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:31:47,434 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:31:47,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:47,434 INFO L85 PathProgramCache]: Analyzing trace with hash -39215718, now seen corresponding path program 1 times [2023-11-29 04:31:47,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:31:47,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511459743] [2023-11-29 04:31:47,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:47,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:31:47,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:31:47,436 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:31:47,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c91232b-66ed-41e9-83b7-94885334aa9a/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-29 04:31:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:31:47,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 04:31:47,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:48,252 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:48,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 370 treesize of output 128 [2023-11-29 04:31:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:31:48,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:52,300 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-11-29 04:31:52,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 611 treesize of output 309 [2023-11-29 04:33:20,363 WARN L293 SmtUtils]: Spent 47.81s on a formula simplification. DAG size of input: 613 DAG size of output: 613 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)