./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU --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 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:09:43,132 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:09:43,220 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:09:43,226 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:09:43,227 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:09:43,265 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:09:43,267 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:09:43,268 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:09:43,269 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:09:43,270 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:09:43,270 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:09:43,271 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:09:43,271 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:09:43,272 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:09:43,274 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:09:43,274 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:09:43,274 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:09:43,275 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:09:43,275 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:09:43,275 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:09:43,275 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:09:43,280 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:09:43,280 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:09:43,281 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:09:43,281 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:09:43,281 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:09:43,281 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:09:43,282 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:09:43,282 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:09:43,282 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:09:43,283 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:09:43,283 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:09:43,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:09:43,284 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:09:43,285 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:09:43,285 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:09:43,286 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:09:43,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:09:43,286 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:09:43,286 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:09:43,286 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:09:43,287 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:09:43,287 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_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2024-10-31 22:09:43,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:09:43,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:09:43,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:09:43,597 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:09:43,599 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:09:43,601 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c Unable to find full path for "g++" [2024-10-31 22:09:45,725 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:09:46,026 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:09:46,027 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-31 22:09:46,035 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/data/ca0fa3c31/896951ac8e95481da821420787215f58/FLAGd60c961c3 [2024-10-31 22:09:46,314 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/data/ca0fa3c31/896951ac8e95481da821420787215f58 [2024-10-31 22:09:46,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:09:46,321 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:09:46,323 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:09:46,324 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:09:46,331 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:09:46,333 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:09:46" (1/1) ... [2024-10-31 22:09:46,334 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60d4bc2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:46, skipping insertion in model container [2024-10-31 22:09:46,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:09:46" (1/1) ... [2024-10-31 22:09:46,368 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:09:46,599 WARN L251 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_120411d5-9b55-47af-92fb-2fc84cb9b66c/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2508,2521] [2024-10-31 22:09:46,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:09:46,624 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:09:46,653 WARN L251 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_120411d5-9b55-47af-92fb-2fc84cb9b66c/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2508,2521] [2024-10-31 22:09:46,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:09:46,681 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:09:46,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:46 WrapperNode [2024-10-31 22:09:46,682 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:09:46,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:09:46,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:09:46,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:09:46,692 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:46" (1/1) ... [2024-10-31 22:09:46,701 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:46" (1/1) ... [2024-10-31 22:09:46,736 INFO L138 Inliner]: procedures = 24, calls = 29, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 193 [2024-10-31 22:09:46,737 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:09:46,737 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:09:46,738 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:09:46,738 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:09:46,747 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:46" (1/1) ... [2024-10-31 22:09:46,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:46" (1/1) ... [2024-10-31 22:09:46,751 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:46" (1/1) ... [2024-10-31 22:09:46,767 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-31 22:09:46,767 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:46" (1/1) ... [2024-10-31 22:09:46,768 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:46" (1/1) ... [2024-10-31 22:09:46,776 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:46" (1/1) ... [2024-10-31 22:09:46,781 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:46" (1/1) ... [2024-10-31 22:09:46,783 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:46" (1/1) ... [2024-10-31 22:09:46,785 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:46" (1/1) ... [2024-10-31 22:09:46,788 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:09:46,789 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:09:46,790 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:09:46,790 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:09:46,791 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:46" (1/1) ... [2024-10-31 22:09:46,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:09:46,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:46,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:09:46,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:09:46,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:09:46,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:09:46,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:09:46,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:09:46,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:09:46,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:09:46,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:09:46,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:09:46,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:09:46,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:09:46,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:09:46,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:09:46,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:09:46,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:09:46,894 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:09:47,070 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:09:47,073 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:09:47,574 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:09:47,574 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:09:48,039 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:09:48,040 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:09:48,040 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:09:48 BoogieIcfgContainer [2024-10-31 22:09:48,040 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:09:48,043 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:09:48,043 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:09:48,047 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:09:48,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:09:46" (1/3) ... [2024-10-31 22:09:48,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e9f463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:09:48, skipping insertion in model container [2024-10-31 22:09:48,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:46" (2/3) ... [2024-10-31 22:09:48,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e9f463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:09:48, skipping insertion in model container [2024-10-31 22:09:48,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:09:48" (3/3) ... [2024-10-31 22:09:48,051 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2024-10-31 22:09:48,073 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:09:48,073 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:09:48,073 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:09:48,131 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:09:48,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 28 transitions, 70 flow [2024-10-31 22:09:48,215 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-10-31 22:09:48,216 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:09:48,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 6/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-10-31 22:09:48,220 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 28 transitions, 70 flow [2024-10-31 22:09:48,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 25 transitions, 62 flow [2024-10-31 22:09:48,241 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:09:48,250 INFO L333 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, 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;@4662a7f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:09:48,250 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-31 22:09:48,269 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:09:48,269 INFO L124 PetriNetUnfolderBase]: 6/24 cut-off events. [2024-10-31 22:09:48,269 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:09:48,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:48,270 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:48,270 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:09:48,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:48,281 INFO L85 PathProgramCache]: Analyzing trace with hash 245197459, now seen corresponding path program 1 times [2024-10-31 22:09:48,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:48,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625835911] [2024-10-31 22:09:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:48,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:49,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:49,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625835911] [2024-10-31 22:09:49,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625835911] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:09:49,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:09:49,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:09:49,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184535994] [2024-10-31 22:09:49,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:49,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:09:49,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:49,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:09:49,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:09:49,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:09:49,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2024-10-31 22:09:49,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:49,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:09:49,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:50,262 INFO L124 PetriNetUnfolderBase]: 288/485 cut-off events. [2024-10-31 22:09:50,262 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-10-31 22:09:50,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 485 events. 288/485 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1769 event pairs, 96 based on Foata normal form. 1/372 useless extension candidates. Maximal degree in co-relation 536. Up to 178 conditions per place. [2024-10-31 22:09:50,275 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 64 selfloop transitions, 10 changer transitions 1/76 dead transitions. [2024-10-31 22:09:50,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 76 transitions, 344 flow [2024-10-31 22:09:50,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:09:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:09:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-10-31 22:09:50,294 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-10-31 22:09:50,296 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 62 flow. Second operand 8 states and 100 transitions. [2024-10-31 22:09:50,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 76 transitions, 344 flow [2024-10-31 22:09:50,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 76 transitions, 316 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:09:50,310 INFO L231 Difference]: Finished difference. Result has 33 places, 34 transitions, 123 flow [2024-10-31 22:09:50,313 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=123, PETRI_PLACES=33, PETRI_TRANSITIONS=34} [2024-10-31 22:09:50,319 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2024-10-31 22:09:50,322 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 34 transitions, 123 flow [2024-10-31 22:09:50,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2024-10-31 22:09:50,322 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:50,323 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:50,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:09:50,323 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:09:50,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:50,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1983090722, now seen corresponding path program 1 times [2024-10-31 22:09:50,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:50,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953687922] [2024-10-31 22:09:50,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:50,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:50,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:50,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953687922] [2024-10-31 22:09:50,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953687922] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:50,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006760083] [2024-10-31 22:09:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:50,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:50,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:50,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:09:50,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:09:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:50,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 22:09:50,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:09:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:51,214 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:09:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:51,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006760083] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:51,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:09:51,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2024-10-31 22:09:51,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151205412] [2024-10-31 22:09:51,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:51,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:09:51,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:51,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:09:51,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:09:51,464 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:09:51,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 123 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:09:51,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:51,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:09:51,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:52,026 INFO L124 PetriNetUnfolderBase]: 617/1023 cut-off events. [2024-10-31 22:09:52,026 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-10-31 22:09:52,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2368 conditions, 1023 events. 617/1023 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4490 event pairs, 279 based on Foata normal form. 1/897 useless extension candidates. Maximal degree in co-relation 1517. Up to 479 conditions per place. [2024-10-31 22:09:52,035 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 92 selfloop transitions, 12 changer transitions 1/106 dead transitions. [2024-10-31 22:09:52,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 106 transitions, 540 flow [2024-10-31 22:09:52,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:09:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:09:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-10-31 22:09:52,037 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-10-31 22:09:52,037 INFO L175 Difference]: Start difference. First operand has 33 places, 34 transitions, 123 flow. Second operand 8 states and 119 transitions. [2024-10-31 22:09:52,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 106 transitions, 540 flow [2024-10-31 22:09:52,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 106 transitions, 536 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-10-31 22:09:52,042 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 210 flow [2024-10-31 22:09:52,043 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-10-31 22:09:52,044 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2024-10-31 22:09:52,044 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 210 flow [2024-10-31 22:09:52,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:09:52,045 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:52,046 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:52,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:09:52,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-10-31 22:09:52,255 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:09:52,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:52,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1744370288, now seen corresponding path program 1 times [2024-10-31 22:09:52,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:52,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559611896] [2024-10-31 22:09:52,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:52,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:52,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:52,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559611896] [2024-10-31 22:09:52,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559611896] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:09:52,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:09:52,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:09:52,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840235556] [2024-10-31 22:09:52,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:52,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:09:52,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:52,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:09:52,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:09:52,397 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:09:52,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:09:52,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:52,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:09:52,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:52,664 INFO L124 PetriNetUnfolderBase]: 487/833 cut-off events. [2024-10-31 22:09:52,664 INFO L125 PetriNetUnfolderBase]: For 570/570 co-relation queries the response was YES. [2024-10-31 22:09:52,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2174 conditions, 833 events. 487/833 cut-off events. For 570/570 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3707 event pairs, 199 based on Foata normal form. 0/745 useless extension candidates. Maximal degree in co-relation 1625. Up to 539 conditions per place. [2024-10-31 22:09:52,671 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 62 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-10-31 22:09:52,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 70 transitions, 447 flow [2024-10-31 22:09:52,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:09:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:09:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-10-31 22:09:52,673 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-10-31 22:09:52,673 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 210 flow. Second operand 6 states and 74 transitions. [2024-10-31 22:09:52,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 70 transitions, 447 flow [2024-10-31 22:09:52,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 70 transitions, 420 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-10-31 22:09:52,679 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 214 flow [2024-10-31 22:09:52,680 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-10-31 22:09:52,680 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 21 predicate places. [2024-10-31 22:09:52,681 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 214 flow [2024-10-31 22:09:52,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:09:52,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:52,681 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:52,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:09:52,682 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:09:52,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:52,683 INFO L85 PathProgramCache]: Analyzing trace with hash 574455480, now seen corresponding path program 1 times [2024-10-31 22:09:52,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:52,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813121318] [2024-10-31 22:09:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:52,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:52,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:52,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813121318] [2024-10-31 22:09:52,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813121318] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:09:52,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:09:52,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:09:52,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013899556] [2024-10-31 22:09:52,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:52,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:09:52,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:52,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:09:52,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:09:52,823 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:09:52,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:09:52,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:52,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:09:52,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:53,053 INFO L124 PetriNetUnfolderBase]: 416/723 cut-off events. [2024-10-31 22:09:53,054 INFO L125 PetriNetUnfolderBase]: For 584/584 co-relation queries the response was YES. [2024-10-31 22:09:53,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1918 conditions, 723 events. 416/723 cut-off events. For 584/584 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3036 event pairs, 207 based on Foata normal form. 0/685 useless extension candidates. Maximal degree in co-relation 1535. Up to 539 conditions per place. [2024-10-31 22:09:53,060 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 52 selfloop transitions, 6 changer transitions 2/61 dead transitions. [2024-10-31 22:09:53,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 400 flow [2024-10-31 22:09:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:09:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:09:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2024-10-31 22:09:53,062 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-10-31 22:09:53,063 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 214 flow. Second operand 6 states and 67 transitions. [2024-10-31 22:09:53,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 400 flow [2024-10-31 22:09:53,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 384 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-31 22:09:53,069 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 220 flow [2024-10-31 22:09:53,069 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=220, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-10-31 22:09:53,070 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 24 predicate places. [2024-10-31 22:09:53,070 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 220 flow [2024-10-31 22:09:53,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:09:53,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:53,071 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:53,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:09:53,072 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:09:53,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:53,072 INFO L85 PathProgramCache]: Analyzing trace with hash 603243545, now seen corresponding path program 1 times [2024-10-31 22:09:53,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:53,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097129078] [2024-10-31 22:09:53,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:53,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:53,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:53,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097129078] [2024-10-31 22:09:53,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097129078] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:53,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627351147] [2024-10-31 22:09:53,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:53,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:53,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:53,307 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:09:53,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:09:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:53,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 22:09:53,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:09:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:53,639 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:09:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:53,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627351147] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:53,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:09:53,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-10-31 22:09:53,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043786447] [2024-10-31 22:09:53,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:53,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:09:53,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:53,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:09:53,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:09:53,776 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:09:53,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 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) [2024-10-31 22:09:53,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:53,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:09:53,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:54,130 INFO L124 PetriNetUnfolderBase]: 391/674 cut-off events. [2024-10-31 22:09:54,130 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-10-31 22:09:54,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1792 conditions, 674 events. 391/674 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2835 event pairs, 192 based on Foata normal form. 1/673 useless extension candidates. Maximal degree in co-relation 1757. Up to 539 conditions per place. [2024-10-31 22:09:54,136 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 50 selfloop transitions, 5 changer transitions 11/67 dead transitions. [2024-10-31 22:09:54,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 421 flow [2024-10-31 22:09:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:09:54,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:09:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-10-31 22:09:54,138 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-10-31 22:09:54,138 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 220 flow. Second operand 7 states and 77 transitions. [2024-10-31 22:09:54,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 421 flow [2024-10-31 22:09:54,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 408 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-10-31 22:09:54,142 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 205 flow [2024-10-31 22:09:54,143 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=205, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2024-10-31 22:09:54,144 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 26 predicate places. [2024-10-31 22:09:54,144 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 205 flow [2024-10-31 22:09:54,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 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) [2024-10-31 22:09:54,144 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:54,144 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:54,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:09:54,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:54,349 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:09:54,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:54,349 INFO L85 PathProgramCache]: Analyzing trace with hash -915834458, now seen corresponding path program 2 times [2024-10-31 22:09:54,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:54,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776310336] [2024-10-31 22:09:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:54,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:54,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:54,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776310336] [2024-10-31 22:09:54,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776310336] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:54,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728863676] [2024-10-31 22:09:54,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:09:54,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:54,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:54,573 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:09:54,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:09:54,668 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:09:54,668 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:09:54,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:09:54,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:09:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:09:54,839 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:09:54,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728863676] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:09:54,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:09:54,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2024-10-31 22:09:54,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848939401] [2024-10-31 22:09:54,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:54,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:09:54,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:54,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:09:54,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:09:54,842 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:09:54,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 205 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 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) [2024-10-31 22:09:54,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:54,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:09:54,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:55,207 INFO L124 PetriNetUnfolderBase]: 388/672 cut-off events. [2024-10-31 22:09:55,208 INFO L125 PetriNetUnfolderBase]: For 456/456 co-relation queries the response was YES. [2024-10-31 22:09:55,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1777 conditions, 672 events. 388/672 cut-off events. For 456/456 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2805 event pairs, 61 based on Foata normal form. 1/671 useless extension candidates. Maximal degree in co-relation 1737. Up to 232 conditions per place. [2024-10-31 22:09:55,214 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 67 selfloop transitions, 18 changer transitions 1/87 dead transitions. [2024-10-31 22:09:55,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 87 transitions, 523 flow [2024-10-31 22:09:55,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:09:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:09:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-10-31 22:09:55,216 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-10-31 22:09:55,216 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 205 flow. Second operand 9 states and 107 transitions. [2024-10-31 22:09:55,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 87 transitions, 523 flow [2024-10-31 22:09:55,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 87 transitions, 504 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-10-31 22:09:55,222 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 288 flow [2024-10-31 22:09:55,222 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=288, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-10-31 22:09:55,223 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 31 predicate places. [2024-10-31 22:09:55,224 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 288 flow [2024-10-31 22:09:55,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 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) [2024-10-31 22:09:55,224 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:55,224 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:55,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:09:55,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:09:55,428 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:09:55,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:55,430 INFO L85 PathProgramCache]: Analyzing trace with hash -133012491, now seen corresponding path program 2 times [2024-10-31 22:09:55,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:55,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453252990] [2024-10-31 22:09:55,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:55,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:55,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:55,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453252990] [2024-10-31 22:09:55,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453252990] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:55,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508526598] [2024-10-31 22:09:55,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:09:55,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:55,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:55,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:09:55,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:09:55,745 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:09:55,746 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:09:55,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:09:55,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:09:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:09:55,798 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:09:55,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508526598] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:09:55,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:09:55,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2024-10-31 22:09:55,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363202743] [2024-10-31 22:09:55,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:55,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:09:55,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:55,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:09:55,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:09:55,801 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:09:55,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:09:55,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:55,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:09:55,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:56,021 INFO L124 PetriNetUnfolderBase]: 482/826 cut-off events. [2024-10-31 22:09:56,021 INFO L125 PetriNetUnfolderBase]: For 901/901 co-relation queries the response was YES. [2024-10-31 22:09:56,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2306 conditions, 826 events. 482/826 cut-off events. For 901/901 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3584 event pairs, 33 based on Foata normal form. 2/826 useless extension candidates. Maximal degree in co-relation 2104. Up to 313 conditions per place. [2024-10-31 22:09:56,026 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 50 selfloop transitions, 17 changer transitions 5/73 dead transitions. [2024-10-31 22:09:56,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 519 flow [2024-10-31 22:09:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:09:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:09:56,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 69 transitions. [2024-10-31 22:09:56,028 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-10-31 22:09:56,028 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 288 flow. Second operand 5 states and 69 transitions. [2024-10-31 22:09:56,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 519 flow [2024-10-31 22:09:56,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 505 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-10-31 22:09:56,033 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 317 flow [2024-10-31 22:09:56,034 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2024-10-31 22:09:56,034 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 35 predicate places. [2024-10-31 22:09:56,035 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 317 flow [2024-10-31 22:09:56,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:09:56,035 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:56,035 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:56,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:09:56,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:56,236 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:09:56,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:56,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2026604512, now seen corresponding path program 1 times [2024-10-31 22:09:56,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:56,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333987614] [2024-10-31 22:09:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:56,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:56,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:56,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333987614] [2024-10-31 22:09:56,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333987614] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:56,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615372860] [2024-10-31 22:09:56,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:56,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:56,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:56,463 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:09:56,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:09:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:56,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:09:56,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:09:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:56,704 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:09:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:56,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615372860] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:56,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:09:56,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-10-31 22:09:56,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762846590] [2024-10-31 22:09:56,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:56,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:09:56,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:56,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:09:56,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:09:56,833 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:09:56,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 317 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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) [2024-10-31 22:09:56,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:56,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:09:56,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:57,171 INFO L124 PetriNetUnfolderBase]: 488/817 cut-off events. [2024-10-31 22:09:57,171 INFO L125 PetriNetUnfolderBase]: For 1632/1632 co-relation queries the response was YES. [2024-10-31 22:09:57,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2484 conditions, 817 events. 488/817 cut-off events. For 1632/1632 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3379 event pairs, 182 based on Foata normal form. 20/836 useless extension candidates. Maximal degree in co-relation 2449. Up to 264 conditions per place. [2024-10-31 22:09:57,176 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 74 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2024-10-31 22:09:57,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 663 flow [2024-10-31 22:09:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:09:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:09:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-10-31 22:09:57,178 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-10-31 22:09:57,178 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 317 flow. Second operand 8 states and 94 transitions. [2024-10-31 22:09:57,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 663 flow [2024-10-31 22:09:57,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 620 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-10-31 22:09:57,185 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 326 flow [2024-10-31 22:09:57,185 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=326, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2024-10-31 22:09:57,186 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 31 predicate places. [2024-10-31 22:09:57,186 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 326 flow [2024-10-31 22:09:57,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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) [2024-10-31 22:09:57,186 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:57,187 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:57,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:09:57,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:57,389 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:09:57,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:57,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1401016533, now seen corresponding path program 1 times [2024-10-31 22:09:57,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:57,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583246750] [2024-10-31 22:09:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:57,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:09:57,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:57,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583246750] [2024-10-31 22:09:57,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583246750] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:09:57,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:09:57,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:09:57,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145061627] [2024-10-31 22:09:57,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:57,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:09:57,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:57,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:09:57,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:09:57,512 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:09:57,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 326 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 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) [2024-10-31 22:09:57,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:57,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:09:57,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:57,727 INFO L124 PetriNetUnfolderBase]: 370/636 cut-off events. [2024-10-31 22:09:57,728 INFO L125 PetriNetUnfolderBase]: For 1179/1179 co-relation queries the response was YES. [2024-10-31 22:09:57,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 636 events. 370/636 cut-off events. For 1179/1179 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2525 event pairs, 188 based on Foata normal form. 25/616 useless extension candidates. Maximal degree in co-relation 1872. Up to 396 conditions per place. [2024-10-31 22:09:57,734 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 52 selfloop transitions, 6 changer transitions 2/61 dead transitions. [2024-10-31 22:09:57,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 61 transitions, 446 flow [2024-10-31 22:09:57,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:09:57,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:09:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-10-31 22:09:57,735 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-10-31 22:09:57,735 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 326 flow. Second operand 5 states and 66 transitions. [2024-10-31 22:09:57,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 61 transitions, 446 flow [2024-10-31 22:09:57,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 422 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-10-31 22:09:57,743 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 263 flow [2024-10-31 22:09:57,743 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2024-10-31 22:09:57,744 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2024-10-31 22:09:57,744 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 263 flow [2024-10-31 22:09:57,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 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) [2024-10-31 22:09:57,744 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:57,744 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:57,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:09:57,745 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:09:57,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:57,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1357813479, now seen corresponding path program 1 times [2024-10-31 22:09:57,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:57,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562368351] [2024-10-31 22:09:57,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:57,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:09:57,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:57,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562368351] [2024-10-31 22:09:57,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562368351] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:09:57,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:09:57,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:09:57,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475848773] [2024-10-31 22:09:57,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:57,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:09:57,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:57,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:09:57,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:09:57,900 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:09:57,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 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) [2024-10-31 22:09:57,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:57,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:09:57,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:58,080 INFO L124 PetriNetUnfolderBase]: 302/525 cut-off events. [2024-10-31 22:09:58,081 INFO L125 PetriNetUnfolderBase]: For 767/767 co-relation queries the response was YES. [2024-10-31 22:09:58,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1535 conditions, 525 events. 302/525 cut-off events. For 767/767 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1960 event pairs, 170 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 1504. Up to 396 conditions per place. [2024-10-31 22:09:58,085 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 30 selfloop transitions, 2 changer transitions 20/53 dead transitions. [2024-10-31 22:09:58,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 368 flow [2024-10-31 22:09:58,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:09:58,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:09:58,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-10-31 22:09:58,086 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-10-31 22:09:58,087 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 263 flow. Second operand 5 states and 60 transitions. [2024-10-31 22:09:58,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 368 flow [2024-10-31 22:09:58,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 354 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-10-31 22:09:58,091 INFO L231 Difference]: Finished difference. Result has 54 places, 33 transitions, 168 flow [2024-10-31 22:09:58,092 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=33} [2024-10-31 22:09:58,092 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2024-10-31 22:09:58,093 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 33 transitions, 168 flow [2024-10-31 22:09:58,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 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) [2024-10-31 22:09:58,093 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:58,093 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:58,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:09:58,093 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:09:58,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:58,094 INFO L85 PathProgramCache]: Analyzing trace with hash -333811787, now seen corresponding path program 1 times [2024-10-31 22:09:58,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:58,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564323536] [2024-10-31 22:09:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:58,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:58,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:58,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564323536] [2024-10-31 22:09:58,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564323536] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:58,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317007333] [2024-10-31 22:09:58,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:58,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:58,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:58,340 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:09:58,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:09:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:58,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:09:58,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:09:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:58,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:09:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:58,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317007333] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:58,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:09:58,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-10-31 22:09:58,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328897396] [2024-10-31 22:09:58,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:58,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:09:58,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:58,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:09:58,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:09:58,665 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:09:58,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 33 transitions, 168 flow. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:09:58,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:09:58,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:09:58,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:09:58,943 INFO L124 PetriNetUnfolderBase]: 328/561 cut-off events. [2024-10-31 22:09:58,943 INFO L125 PetriNetUnfolderBase]: For 674/674 co-relation queries the response was YES. [2024-10-31 22:09:58,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1645 conditions, 561 events. 328/561 cut-off events. For 674/674 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2111 event pairs, 159 based on Foata normal form. 28/588 useless extension candidates. Maximal degree in co-relation 1614. Up to 278 conditions per place. [2024-10-31 22:09:58,951 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 39 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2024-10-31 22:09:58,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 333 flow [2024-10-31 22:09:58,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:09:58,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:09:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 62 transitions. [2024-10-31 22:09:58,959 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3163265306122449 [2024-10-31 22:09:58,960 INFO L175 Difference]: Start difference. First operand has 54 places, 33 transitions, 168 flow. Second operand 7 states and 62 transitions. [2024-10-31 22:09:58,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 333 flow [2024-10-31 22:09:58,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 312 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-31 22:09:58,968 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 186 flow [2024-10-31 22:09:58,969 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2024-10-31 22:09:58,969 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2024-10-31 22:09:58,970 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 186 flow [2024-10-31 22:09:58,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:09:58,970 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:09:58,970 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:59,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:09:59,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:59,179 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:09:59,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:59,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1721947342, now seen corresponding path program 1 times [2024-10-31 22:09:59,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:59,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456377119] [2024-10-31 22:09:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:59,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:10:00,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:00,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456377119] [2024-10-31 22:10:00,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456377119] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:10:00,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661679970] [2024-10-31 22:10:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:00,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:10:00,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:10:00,013 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:10:00,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:10:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:00,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:10:00,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:10:00,325 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-31 22:10:00,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-10-31 22:10:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:10:00,373 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:10:00,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661679970] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:00,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:10:00,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-10-31 22:10:00,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295227073] [2024-10-31 22:10:00,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:00,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:10:00,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:00,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:10:00,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:10:00,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:10:00,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 186 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:00,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:00,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:10:00,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:00,889 INFO L124 PetriNetUnfolderBase]: 461/793 cut-off events. [2024-10-31 22:10:00,889 INFO L125 PetriNetUnfolderBase]: For 1154/1154 co-relation queries the response was YES. [2024-10-31 22:10:00,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2490 conditions, 793 events. 461/793 cut-off events. For 1154/1154 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3428 event pairs, 195 based on Foata normal form. 1/793 useless extension candidates. Maximal degree in co-relation 2458. Up to 497 conditions per place. [2024-10-31 22:10:00,896 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 68 selfloop transitions, 9 changer transitions 6/84 dead transitions. [2024-10-31 22:10:00,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 567 flow [2024-10-31 22:10:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:10:00,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:10:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-10-31 22:10:00,898 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-10-31 22:10:00,898 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 186 flow. Second operand 7 states and 91 transitions. [2024-10-31 22:10:00,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 567 flow [2024-10-31 22:10:00,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 84 transitions, 554 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-31 22:10:00,903 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 252 flow [2024-10-31 22:10:00,904 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=252, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2024-10-31 22:10:00,904 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 27 predicate places. [2024-10-31 22:10:00,904 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 252 flow [2024-10-31 22:10:00,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:00,905 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:00,905 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:00,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:10:01,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:10:01,106 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:10:01,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:01,107 INFO L85 PathProgramCache]: Analyzing trace with hash -686636724, now seen corresponding path program 2 times [2024-10-31 22:10:01,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:01,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933458492] [2024-10-31 22:10:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:01,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:02,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:02,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933458492] [2024-10-31 22:10:02,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933458492] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:10:02,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936496762] [2024-10-31 22:10:02,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:10:02,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:10:02,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:10:02,112 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:10:02,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:10:02,267 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:10:02,267 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:10:02,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:10:02,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:10:02,431 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-31 22:10:02,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-10-31 22:10:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:10:02,472 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:10:02,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936496762] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:02,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:10:02,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2024-10-31 22:10:02,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980609667] [2024-10-31 22:10:02,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:02,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:10:02,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:02,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:10:02,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:10:02,474 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:10:02,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 252 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:02,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:02,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:10:02,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:02,910 INFO L124 PetriNetUnfolderBase]: 500/867 cut-off events. [2024-10-31 22:10:02,910 INFO L125 PetriNetUnfolderBase]: For 2057/2057 co-relation queries the response was YES. [2024-10-31 22:10:02,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3034 conditions, 867 events. 500/867 cut-off events. For 2057/2057 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3857 event pairs, 222 based on Foata normal form. 1/867 useless extension candidates. Maximal degree in co-relation 3001. Up to 503 conditions per place. [2024-10-31 22:10:02,917 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 63 selfloop transitions, 13 changer transitions 6/83 dead transitions. [2024-10-31 22:10:02,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 83 transitions, 632 flow [2024-10-31 22:10:02,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:10:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:10:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-10-31 22:10:02,919 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-10-31 22:10:02,919 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 252 flow. Second operand 7 states and 91 transitions. [2024-10-31 22:10:02,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 83 transitions, 632 flow [2024-10-31 22:10:02,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 83 transitions, 597 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-10-31 22:10:02,924 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 342 flow [2024-10-31 22:10:02,924 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-10-31 22:10:02,925 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2024-10-31 22:10:02,925 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 342 flow [2024-10-31 22:10:02,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:02,925 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:02,925 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:02,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 22:10:03,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-31 22:10:03,126 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:10:03,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:03,127 INFO L85 PathProgramCache]: Analyzing trace with hash 810573182, now seen corresponding path program 3 times [2024-10-31 22:10:03,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:03,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510567132] [2024-10-31 22:10:03,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:03,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:10:04,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:04,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510567132] [2024-10-31 22:10:04,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510567132] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:10:04,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285263111] [2024-10-31 22:10:04,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:10:04,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:10:04,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:10:04,015 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:10:04,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:10:04,127 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-31 22:10:04,127 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:10:04,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:10:04,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:10:04,317 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-31 22:10:04,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-10-31 22:10:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:10:04,356 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:10:04,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285263111] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:04,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:10:04,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-10-31 22:10:04,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371580296] [2024-10-31 22:10:04,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:04,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:10:04,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:04,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:10:04,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:10:04,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:10:04,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 342 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:04,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:04,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:10:04,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:04,797 INFO L124 PetriNetUnfolderBase]: 527/912 cut-off events. [2024-10-31 22:10:04,797 INFO L125 PetriNetUnfolderBase]: For 2681/2681 co-relation queries the response was YES. [2024-10-31 22:10:04,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3454 conditions, 912 events. 527/912 cut-off events. For 2681/2681 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4116 event pairs, 232 based on Foata normal form. 1/912 useless extension candidates. Maximal degree in co-relation 3418. Up to 511 conditions per place. [2024-10-31 22:10:04,805 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 70 selfloop transitions, 17 changer transitions 6/94 dead transitions. [2024-10-31 22:10:04,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 94 transitions, 818 flow [2024-10-31 22:10:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:10:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:10:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-10-31 22:10:04,806 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45408163265306123 [2024-10-31 22:10:04,807 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 342 flow. Second operand 7 states and 89 transitions. [2024-10-31 22:10:04,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 94 transitions, 818 flow [2024-10-31 22:10:04,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 792 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-10-31 22:10:04,815 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 466 flow [2024-10-31 22:10:04,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=466, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2024-10-31 22:10:04,816 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 41 predicate places. [2024-10-31 22:10:04,816 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 466 flow [2024-10-31 22:10:04,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:04,816 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:04,817 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:04,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-31 22:10:05,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-31 22:10:05,020 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:10:05,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:05,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2087679896, now seen corresponding path program 4 times [2024-10-31 22:10:05,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:05,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059918515] [2024-10-31 22:10:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:05,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:10:05,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:05,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059918515] [2024-10-31 22:10:05,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059918515] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:05,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:05,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-31 22:10:05,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021096093] [2024-10-31 22:10:05,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:05,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:10:05,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:05,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:10:05,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:10:05,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:10:05,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 466 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:05,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:05,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:10:05,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:06,220 INFO L124 PetriNetUnfolderBase]: 517/889 cut-off events. [2024-10-31 22:10:06,221 INFO L125 PetriNetUnfolderBase]: For 3234/3234 co-relation queries the response was YES. [2024-10-31 22:10:06,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3566 conditions, 889 events. 517/889 cut-off events. For 3234/3234 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3943 event pairs, 225 based on Foata normal form. 1/889 useless extension candidates. Maximal degree in co-relation 3527. Up to 504 conditions per place. [2024-10-31 22:10:06,229 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 59 selfloop transitions, 23 changer transitions 6/89 dead transitions. [2024-10-31 22:10:06,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 834 flow [2024-10-31 22:10:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:10:06,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:10:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-10-31 22:10:06,231 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-10-31 22:10:06,231 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 466 flow. Second operand 9 states and 96 transitions. [2024-10-31 22:10:06,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 834 flow [2024-10-31 22:10:06,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 784 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-10-31 22:10:06,240 INFO L231 Difference]: Finished difference. Result has 74 places, 57 transitions, 546 flow [2024-10-31 22:10:06,241 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=546, PETRI_PLACES=74, PETRI_TRANSITIONS=57} [2024-10-31 22:10:06,241 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-10-31 22:10:06,241 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 57 transitions, 546 flow [2024-10-31 22:10:06,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:06,242 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:06,242 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:06,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 22:10:06,242 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:10:06,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:06,243 INFO L85 PathProgramCache]: Analyzing trace with hash 200190496, now seen corresponding path program 5 times [2024-10-31 22:10:06,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:06,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508255129] [2024-10-31 22:10:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:06,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:10:07,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:07,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508255129] [2024-10-31 22:10:07,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508255129] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:10:07,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073838010] [2024-10-31 22:10:07,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:10:07,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:10:07,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:10:07,040 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:10:07,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:10:07,168 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:10:07,168 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:10:07,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-31 22:10:07,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:10:07,352 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:10:07,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2024-10-31 22:10:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:10:07,404 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:10:07,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073838010] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:07,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:10:07,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 12 [2024-10-31 22:10:07,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758859952] [2024-10-31 22:10:07,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:07,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:10:07,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:07,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:10:07,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:10:07,408 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:10:07,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 57 transitions, 546 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:07,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:07,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:10:07,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:08,008 INFO L124 PetriNetUnfolderBase]: 683/1178 cut-off events. [2024-10-31 22:10:08,009 INFO L125 PetriNetUnfolderBase]: For 4237/4237 co-relation queries the response was YES. [2024-10-31 22:10:08,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4751 conditions, 1178 events. 683/1178 cut-off events. For 4237/4237 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5552 event pairs, 272 based on Foata normal form. 1/1179 useless extension candidates. Maximal degree in co-relation 4708. Up to 682 conditions per place. [2024-10-31 22:10:08,021 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 83 selfloop transitions, 25 changer transitions 6/115 dead transitions. [2024-10-31 22:10:08,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 115 transitions, 1168 flow [2024-10-31 22:10:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:10:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:10:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-10-31 22:10:08,024 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-10-31 22:10:08,024 INFO L175 Difference]: Start difference. First operand has 74 places, 57 transitions, 546 flow. Second operand 9 states and 96 transitions. [2024-10-31 22:10:08,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 115 transitions, 1168 flow [2024-10-31 22:10:08,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 1107 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-10-31 22:10:08,040 INFO L231 Difference]: Finished difference. Result has 80 places, 66 transitions, 672 flow [2024-10-31 22:10:08,040 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=672, PETRI_PLACES=80, PETRI_TRANSITIONS=66} [2024-10-31 22:10:08,041 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 54 predicate places. [2024-10-31 22:10:08,041 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 66 transitions, 672 flow [2024-10-31 22:10:08,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:08,042 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:08,042 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:08,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-31 22:10:08,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-31 22:10:08,246 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:10:08,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:08,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1659732378, now seen corresponding path program 6 times [2024-10-31 22:10:08,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:08,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340184682] [2024-10-31 22:10:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:08,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:10:09,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:09,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340184682] [2024-10-31 22:10:09,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340184682] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:10:09,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635757459] [2024-10-31 22:10:09,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:10:09,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:10:09,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:10:09,066 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:10:09,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 22:10:09,196 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-10-31 22:10:09,197 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:10:09,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:10:09,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:10:09,350 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-31 22:10:09,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-10-31 22:10:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:10:09,410 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:10:09,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635757459] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:09,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:10:09,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-10-31 22:10:09,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781859008] [2024-10-31 22:10:09,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:09,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:10:09,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:09,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:10:09,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:10:09,413 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:10:09,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 66 transitions, 672 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:09,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:09,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:10:09,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:10,083 INFO L124 PetriNetUnfolderBase]: 679/1172 cut-off events. [2024-10-31 22:10:10,083 INFO L125 PetriNetUnfolderBase]: For 5075/5075 co-relation queries the response was YES. [2024-10-31 22:10:10,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5083 conditions, 1172 events. 679/1172 cut-off events. For 5075/5075 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5488 event pairs, 281 based on Foata normal form. 2/1174 useless extension candidates. Maximal degree in co-relation 5037. Up to 689 conditions per place. [2024-10-31 22:10:10,100 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 75 selfloop transitions, 27 changer transitions 7/110 dead transitions. [2024-10-31 22:10:10,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 110 transitions, 1177 flow [2024-10-31 22:10:10,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:10:10,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:10:10,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-10-31 22:10:10,106 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2024-10-31 22:10:10,106 INFO L175 Difference]: Start difference. First operand has 80 places, 66 transitions, 672 flow. Second operand 7 states and 87 transitions. [2024-10-31 22:10:10,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 110 transitions, 1177 flow [2024-10-31 22:10:10,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 110 transitions, 1114 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-10-31 22:10:10,130 INFO L231 Difference]: Finished difference. Result has 86 places, 76 transitions, 849 flow [2024-10-31 22:10:10,130 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=849, PETRI_PLACES=86, PETRI_TRANSITIONS=76} [2024-10-31 22:10:10,135 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 60 predicate places. [2024-10-31 22:10:10,135 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 76 transitions, 849 flow [2024-10-31 22:10:10,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:10,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:10,136 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:10,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-31 22:10:10,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-31 22:10:10,338 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:10:10,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:10,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2015334144, now seen corresponding path program 7 times [2024-10-31 22:10:10,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:10,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620883899] [2024-10-31 22:10:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:10,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:10:11,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:11,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620883899] [2024-10-31 22:10:11,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620883899] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:10:11,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670535888] [2024-10-31 22:10:11,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-31 22:10:11,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:10:11,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:10:11,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:10:11,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-31 22:10:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:11,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:10:11,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:10:11,340 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-31 22:10:11,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-10-31 22:10:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:10:11,379 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:10:11,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670535888] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:11,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:10:11,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2024-10-31 22:10:11,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339862252] [2024-10-31 22:10:11,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:11,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:10:11,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:11,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:10:11,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:10:11,381 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:10:11,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 76 transitions, 849 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:11,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:11,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:10:11,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:10:11,893 INFO L124 PetriNetUnfolderBase]: 676/1166 cut-off events. [2024-10-31 22:10:11,894 INFO L125 PetriNetUnfolderBase]: For 6097/6097 co-relation queries the response was YES. [2024-10-31 22:10:11,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5200 conditions, 1166 events. 676/1166 cut-off events. For 6097/6097 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5438 event pairs, 291 based on Foata normal form. 1/1166 useless extension candidates. Maximal degree in co-relation 5151. Up to 689 conditions per place. [2024-10-31 22:10:11,907 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 76 selfloop transitions, 28 changer transitions 6/111 dead transitions. [2024-10-31 22:10:11,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 1269 flow [2024-10-31 22:10:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:10:11,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:10:11,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-10-31 22:10:11,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-10-31 22:10:11,909 INFO L175 Difference]: Start difference. First operand has 86 places, 76 transitions, 849 flow. Second operand 7 states and 90 transitions. [2024-10-31 22:10:11,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 1269 flow [2024-10-31 22:10:11,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 111 transitions, 1213 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-10-31 22:10:11,931 INFO L231 Difference]: Finished difference. Result has 93 places, 80 transitions, 938 flow [2024-10-31 22:10:11,932 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=938, PETRI_PLACES=93, PETRI_TRANSITIONS=80} [2024-10-31 22:10:11,932 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 67 predicate places. [2024-10-31 22:10:11,933 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 80 transitions, 938 flow [2024-10-31 22:10:11,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:11,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:10:11,933 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:10:11,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-31 22:10:12,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_120411d5-9b55-47af-92fb-2fc84cb9b66c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-31 22:10:12,134 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:10:12,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:10:12,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1802163952, now seen corresponding path program 8 times [2024-10-31 22:10:12,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:10:12,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878189468] [2024-10-31 22:10:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:10:12,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:10:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:10:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:10:12,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:10:12,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878189468] [2024-10-31 22:10:12,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878189468] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:10:12,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:10:12,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-31 22:10:12,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617477744] [2024-10-31 22:10:12,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:10:12,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:10:12,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:10:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:10:12,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:10:12,703 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-10-31 22:10:12,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 80 transitions, 938 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:10:12,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:10:12,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-10-31 22:10:12,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand