./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd --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 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 12:52:35,162 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 12:52:35,277 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 12:52:35,287 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 12:52:35,287 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 12:52:35,335 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 12:52:35,337 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 12:52:35,337 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 12:52:35,338 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 12:52:35,338 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 12:52:35,339 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 12:52:35,340 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 12:52:35,340 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 12:52:35,340 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 12:52:35,340 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 12:52:35,341 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 12:52:35,341 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 12:52:35,341 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 12:52:35,341 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 12:52:35,341 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 12:52:35,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 12:52:35,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 12:52:35,342 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 12:52:35,342 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 12:52:35,342 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 12:52:35,342 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 12:52:35,343 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 12:52:35,343 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 12:52:35,343 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 12:52:35,343 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 12:52:35,344 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 12:52:35,344 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 12:52:35,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:52:35,344 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 12:52:35,345 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 12:52:35,345 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 12:52:35,345 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 12:52:35,345 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 12:52:35,346 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 12:52:35,346 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 12:52:35,346 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 12:52:35,346 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 12:52:35,347 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd 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 -> 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b [2024-11-13 12:52:35,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 12:52:35,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 12:52:35,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 12:52:35,785 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 12:52:35,786 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 12:52:35,789 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c Unable to find full path for "g++" [2024-11-13 12:52:38,380 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 12:52:38,712 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 12:52:38,713 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-11-13 12:52:38,725 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/data/eb504771c/fa5decd4aabc4cdb923c09ac395af3b4/FLAG4d991b9ab [2024-11-13 12:52:38,987 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/data/eb504771c/fa5decd4aabc4cdb923c09ac395af3b4 [2024-11-13 12:52:38,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 12:52:38,993 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 12:52:38,995 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 12:52:38,995 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 12:52:39,000 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 12:52:39,002 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:52:38" (1/1) ... [2024-11-13 12:52:39,003 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2824bccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:52:39, skipping insertion in model container [2024-11-13 12:52:39,004 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:52:38" (1/1) ... [2024-11-13 12:52:39,025 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 12:52:39,295 WARN L250 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_249a3d25-5d3f-492c-ae74-e812ba65fee9/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2500,2513] [2024-11-13 12:52:39,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:52:39,324 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 12:52:39,348 WARN L250 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_249a3d25-5d3f-492c-ae74-e812ba65fee9/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2500,2513] [2024-11-13 12:52:39,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:52:39,372 INFO L204 MainTranslator]: Completed translation [2024-11-13 12:52:39,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:52:39 WrapperNode [2024-11-13 12:52:39,373 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 12:52:39,374 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 12:52:39,374 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 12:52:39,374 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 12:52:39,383 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:52:39" (1/1) ... [2024-11-13 12:52:39,392 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:52:39" (1/1) ... [2024-11-13 12:52:39,426 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 131 [2024-11-13 12:52:39,431 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 12:52:39,431 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 12:52:39,432 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 12:52:39,432 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 12:52:39,446 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:52:39" (1/1) ... [2024-11-13 12:52:39,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:52:39" (1/1) ... [2024-11-13 12:52:39,450 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:52:39" (1/1) ... [2024-11-13 12:52:39,483 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-13 12:52:39,486 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:52:39" (1/1) ... [2024-11-13 12:52:39,487 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:52:39" (1/1) ... [2024-11-13 12:52:39,497 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:52:39" (1/1) ... [2024-11-13 12:52:39,509 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:52:39" (1/1) ... [2024-11-13 12:52:39,510 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:52:39" (1/1) ... [2024-11-13 12:52:39,512 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:52:39" (1/1) ... [2024-11-13 12:52:39,514 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 12:52:39,515 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 12:52:39,515 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 12:52:39,515 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 12:52:39,516 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:52:39" (1/1) ... [2024-11-13 12:52:39,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:52:39,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:52:39,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 12:52:39,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 12:52:39,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 12:52:39,603 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 12:52:39,603 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 12:52:39,603 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 12:52:39,603 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 12:52:39,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 12:52:39,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 12:52:39,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 12:52:39,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 12:52:39,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 12:52:39,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 12:52:39,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 12:52:39,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 12:52:39,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 12:52:39,606 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 12:52:39,773 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 12:52:39,775 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 12:52:40,265 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 12:52:40,266 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 12:52:40,594 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 12:52:40,594 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 12:52:40,595 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:52:40 BoogieIcfgContainer [2024-11-13 12:52:40,595 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 12:52:40,614 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 12:52:40,614 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 12:52:40,624 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 12:52:40,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 12:52:38" (1/3) ... [2024-11-13 12:52:40,625 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d01a084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:52:40, skipping insertion in model container [2024-11-13 12:52:40,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:52:39" (2/3) ... [2024-11-13 12:52:40,625 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d01a084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:52:40, skipping insertion in model container [2024-11-13 12:52:40,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:52:40" (3/3) ... [2024-11-13 12:52:40,628 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2024-11-13 12:52:40,647 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 12:52:40,649 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-cond-2.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 12:52:40,649 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 12:52:40,738 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-13 12:52:40,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-13 12:52:40,845 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-13 12:52:40,849 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 12:52:40,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-11-13 12:52:40,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-13 12:52:40,861 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-13 12:52:40,873 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 12:52:40,887 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;@6227fef4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 12:52:40,887 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-13 12:52:40,900 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 12:52:40,900 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-13 12:52:40,900 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 12:52:40,900 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:52:40,901 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:52:40,901 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:52:40,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:52:40,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1774761982, now seen corresponding path program 1 times [2024-11-13 12:52:40,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:52:40,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744096798] [2024-11-13 12:52:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:52:40,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:52:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:52:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:52:41,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:52:41,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744096798] [2024-11-13 12:52:41,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744096798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:52:41,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:52:41,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 12:52:41,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947830317] [2024-11-13 12:52:41,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:52:41,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:52:41,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:52:41,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:52:41,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:52:41,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:52:41,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:41,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:52:41,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:52:41,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:52:41,639 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-11-13 12:52:41,639 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-13 12:52:41,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2024-11-13 12:52:41,645 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-11-13 12:52:41,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-11-13 12:52:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:52:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 12:52:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-11-13 12:52:41,663 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-13 12:52:41,666 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-11-13 12:52:41,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-11-13 12:52:41,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 12:52:41,675 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-11-13 12:52:41,677 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2024-11-13 12:52:41,682 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-11-13 12:52:41,682 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-11-13 12:52:41,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:41,683 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:52:41,683 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:52:41,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 12:52:41,683 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:52:41,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:52:41,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1486341736, now seen corresponding path program 1 times [2024-11-13 12:52:41,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:52:41,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5229900] [2024-11-13 12:52:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:52:41,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:52:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:52:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:42,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:52:42,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5229900] [2024-11-13 12:52:42,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5229900] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:52:42,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:52:42,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 12:52:42,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107448392] [2024-11-13 12:52:42,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:52:42,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:52:42,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:52:42,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:52:42,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:52:42,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:52:42,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2024-11-13 12:52:42,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:52:42,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:52:42,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:52:42,661 INFO L124 PetriNetUnfolderBase]: 67/123 cut-off events. [2024-11-13 12:52:42,664 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 12:52:42,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 123 events. 67/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 328 event pairs, 2 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 249. Up to 77 conditions per place. [2024-11-13 12:52:42,668 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 30 selfloop transitions, 11 changer transitions 2/44 dead transitions. [2024-11-13 12:52:42,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 44 transitions, 194 flow [2024-11-13 12:52:42,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:52:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 12:52:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2024-11-13 12:52:42,671 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-11-13 12:52:42,671 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 6 states and 62 transitions. [2024-11-13 12:52:42,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 44 transitions, 194 flow [2024-11-13 12:52:42,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-13 12:52:42,675 INFO L231 Difference]: Finished difference. Result has 27 places, 28 transitions, 114 flow [2024-11-13 12:52:42,676 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=27, PETRI_TRANSITIONS=28} [2024-11-13 12:52:42,678 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2024-11-13 12:52:42,678 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 28 transitions, 114 flow [2024-11-13 12:52:42,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2024-11-13 12:52:42,679 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:52:42,679 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:52:42,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 12:52:42,679 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:52:42,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:52:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1782270170, now seen corresponding path program 2 times [2024-11-13 12:52:42,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:52:42,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491390096] [2024-11-13 12:52:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:52:42,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:52:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:52:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:43,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:52:43,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491390096] [2024-11-13 12:52:43,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491390096] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:52:43,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:52:43,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 12:52:43,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151090223] [2024-11-13 12:52:43,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:52:43,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:52:43,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:52:43,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:52:43,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:52:43,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:52:43,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 28 transitions, 114 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2024-11-13 12:52:43,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:52:43,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:52:43,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:52:43,286 INFO L124 PetriNetUnfolderBase]: 67/125 cut-off events. [2024-11-13 12:52:43,286 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-13 12:52:43,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 125 events. 67/125 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 328 event pairs, 0 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 362. Up to 77 conditions per place. [2024-11-13 12:52:43,288 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 29 selfloop transitions, 15 changer transitions 2/47 dead transitions. [2024-11-13 12:52:43,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 268 flow [2024-11-13 12:52:43,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:52:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 12:52:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2024-11-13 12:52:43,291 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-11-13 12:52:43,291 INFO L175 Difference]: Start difference. First operand has 27 places, 28 transitions, 114 flow. Second operand 7 states and 64 transitions. [2024-11-13 12:52:43,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 268 flow [2024-11-13 12:52:43,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 47 transitions, 260 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-13 12:52:43,297 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 173 flow [2024-11-13 12:52:43,297 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=173, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-11-13 12:52:43,298 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2024-11-13 12:52:43,298 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 173 flow [2024-11-13 12:52:43,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2024-11-13 12:52:43,298 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:52:43,299 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:52:43,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 12:52:43,299 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:52:43,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:52:43,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1782864816, now seen corresponding path program 3 times [2024-11-13 12:52:43,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:52:43,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572253645] [2024-11-13 12:52:43,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:52:43,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:52:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:52:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:43,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:52:43,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572253645] [2024-11-13 12:52:43,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572253645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:52:43,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:52:43,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 12:52:43,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535962126] [2024-11-13 12:52:43,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:52:43,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:52:43,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:52:43,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:52:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:52:43,680 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:52:43,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2024-11-13 12:52:43,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:52:43,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:52:43,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:52:43,928 INFO L124 PetriNetUnfolderBase]: 83/158 cut-off events. [2024-11-13 12:52:43,929 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2024-11-13 12:52:43,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 158 events. 83/158 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 452 event pairs, 6 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 520. Up to 58 conditions per place. [2024-11-13 12:52:43,931 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 35 selfloop transitions, 19 changer transitions 2/57 dead transitions. [2024-11-13 12:52:43,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 57 transitions, 368 flow [2024-11-13 12:52:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:52:43,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-13 12:52:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 76 transitions. [2024-11-13 12:52:43,934 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-11-13 12:52:43,934 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 173 flow. Second operand 8 states and 76 transitions. [2024-11-13 12:52:43,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 57 transitions, 368 flow [2024-11-13 12:52:43,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 341 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-11-13 12:52:43,943 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 232 flow [2024-11-13 12:52:43,944 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=232, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-11-13 12:52:43,944 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2024-11-13 12:52:43,945 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 232 flow [2024-11-13 12:52:43,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2024-11-13 12:52:43,945 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:52:43,945 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:52:43,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 12:52:43,946 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:52:43,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:52:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1067731089, now seen corresponding path program 1 times [2024-11-13 12:52:43,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:52:43,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990399251] [2024-11-13 12:52:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:52:43,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:52:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:52:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:44,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:52:44,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990399251] [2024-11-13 12:52:44,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990399251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:52:44,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068799463] [2024-11-13 12:52:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:52:44,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:52:44,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:52:44,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:52:44,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 12:52:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:52:44,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-13 12:52:44,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:52:44,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 12:52:45,192 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 12:52:45,194 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 17 [2024-11-13 12:52:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:52:45,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:52:46,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2024-11-13 12:52:46,594 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:52:46,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 129 [2024-11-13 12:52:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:52:47,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068799463] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:52:47,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:52:47,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2024-11-13 12:52:47,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102682100] [2024-11-13 12:52:47,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:52:47,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 12:52:47,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:52:47,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 12:52:47,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2024-11-13 12:52:47,399 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:52:47,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 232 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:47,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:52:47,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:52:47,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:52:49,410 INFO L124 PetriNetUnfolderBase]: 273/493 cut-off events. [2024-11-13 12:52:49,411 INFO L125 PetriNetUnfolderBase]: For 716/716 co-relation queries the response was YES. [2024-11-13 12:52:49,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1862 conditions, 493 events. 273/493 cut-off events. For 716/716 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1979 event pairs, 26 based on Foata normal form. 13/504 useless extension candidates. Maximal degree in co-relation 1213. Up to 171 conditions per place. [2024-11-13 12:52:49,418 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 71 selfloop transitions, 41 changer transitions 54/167 dead transitions. [2024-11-13 12:52:49,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 167 transitions, 1184 flow [2024-11-13 12:52:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 12:52:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-13 12:52:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 239 transitions. [2024-11-13 12:52:49,421 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4425925925925926 [2024-11-13 12:52:49,421 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 232 flow. Second operand 27 states and 239 transitions. [2024-11-13 12:52:49,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 167 transitions, 1184 flow [2024-11-13 12:52:49,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 167 transitions, 1129 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-13 12:52:49,438 INFO L231 Difference]: Finished difference. Result has 77 places, 59 transitions, 496 flow [2024-11-13 12:52:49,438 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=496, PETRI_PLACES=77, PETRI_TRANSITIONS=59} [2024-11-13 12:52:49,441 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2024-11-13 12:52:49,441 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 59 transitions, 496 flow [2024-11-13 12:52:49,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:49,441 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:52:49,441 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:52:49,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 12:52:49,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:52:49,644 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:52:49,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:52:49,645 INFO L85 PathProgramCache]: Analyzing trace with hash 820367024, now seen corresponding path program 1 times [2024-11-13 12:52:49,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:52:49,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876069736] [2024-11-13 12:52:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:52:49,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:52:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:52:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:50,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:52:50,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876069736] [2024-11-13 12:52:50,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876069736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:52:50,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450007158] [2024-11-13 12:52:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:52:50,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:52:50,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:52:50,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:52:50,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 12:52:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:52:50,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 12:52:50,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:52:50,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 12:52:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:50,524 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:52:50,810 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 12:52:50,810 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 42 treesize of output 22 [2024-11-13 12:52:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:50,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450007158] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:52:50,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:52:50,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-11-13 12:52:50,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250872468] [2024-11-13 12:52:50,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:52:50,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 12:52:50,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:52:50,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 12:52:50,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:52:50,915 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:52:50,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 59 transitions, 496 flow. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:50,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:52:50,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:52:50,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:52:51,385 INFO L124 PetriNetUnfolderBase]: 217/389 cut-off events. [2024-11-13 12:52:51,385 INFO L125 PetriNetUnfolderBase]: For 1487/1487 co-relation queries the response was YES. [2024-11-13 12:52:51,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 389 events. 217/389 cut-off events. For 1487/1487 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1439 event pairs, 9 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 1848. Up to 236 conditions per place. [2024-11-13 12:52:51,394 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 59 selfloop transitions, 35 changer transitions 3/98 dead transitions. [2024-11-13 12:52:51,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 916 flow [2024-11-13 12:52:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 12:52:51,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 12:52:51,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-11-13 12:52:51,400 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-13 12:52:51,401 INFO L175 Difference]: Start difference. First operand has 77 places, 59 transitions, 496 flow. Second operand 10 states and 94 transitions. [2024-11-13 12:52:51,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 916 flow [2024-11-13 12:52:51,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 98 transitions, 795 flow, removed 47 selfloop flow, removed 12 redundant places. [2024-11-13 12:52:51,420 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 590 flow [2024-11-13 12:52:51,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=590, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-11-13 12:52:51,421 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2024-11-13 12:52:51,422 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 590 flow [2024-11-13 12:52:51,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:51,422 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:52:51,422 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:52:51,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 12:52:51,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 12:52:51,626 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:52:51,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:52:51,627 INFO L85 PathProgramCache]: Analyzing trace with hash -905112434, now seen corresponding path program 2 times [2024-11-13 12:52:51,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:52:51,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070708696] [2024-11-13 12:52:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:52:51,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:52:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:52:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:52,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:52:52,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070708696] [2024-11-13 12:52:52,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070708696] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:52:52,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986373659] [2024-11-13 12:52:52,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:52:52,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:52:52,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:52:52,210 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:52:52,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 12:52:52,319 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:52:52,319 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:52:52,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 12:52:52,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:52:52,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 12:52:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:52,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:52:52,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:52:52,759 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 48 treesize of output 33 [2024-11-13 12:52:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:52,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986373659] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:52:52,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:52:52,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2024-11-13 12:52:52,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682057083] [2024-11-13 12:52:52,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:52:52,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 12:52:52,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:52:52,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 12:52:52,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:52:52,920 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:52:52,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 590 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:52,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:52:52,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:52:52,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:52:53,470 INFO L124 PetriNetUnfolderBase]: 257/455 cut-off events. [2024-11-13 12:52:53,473 INFO L125 PetriNetUnfolderBase]: For 1502/1502 co-relation queries the response was YES. [2024-11-13 12:52:53,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 455 events. 257/455 cut-off events. For 1502/1502 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1761 event pairs, 25 based on Foata normal form. 1/456 useless extension candidates. Maximal degree in co-relation 2148. Up to 350 conditions per place. [2024-11-13 12:52:53,482 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 66 selfloop transitions, 39 changer transitions 3/109 dead transitions. [2024-11-13 12:52:53,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 1045 flow [2024-11-13 12:52:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 12:52:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-13 12:52:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 94 transitions. [2024-11-13 12:52:53,487 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-11-13 12:52:53,487 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 590 flow. Second operand 11 states and 94 transitions. [2024-11-13 12:52:53,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 1045 flow [2024-11-13 12:52:53,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 977 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-11-13 12:52:53,505 INFO L231 Difference]: Finished difference. Result has 78 places, 87 transitions, 803 flow [2024-11-13 12:52:53,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=803, PETRI_PLACES=78, PETRI_TRANSITIONS=87} [2024-11-13 12:52:53,507 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2024-11-13 12:52:53,507 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 87 transitions, 803 flow [2024-11-13 12:52:53,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:53,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:52:53,507 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:52:53,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 12:52:53,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:52:53,712 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:52:53,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:52:53,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1685933370, now seen corresponding path program 3 times [2024-11-13 12:52:53,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:52:53,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382019830] [2024-11-13 12:52:53,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:52:53,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:52:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:52:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:54,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:52:54,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382019830] [2024-11-13 12:52:54,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382019830] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:52:54,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786744041] [2024-11-13 12:52:54,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:52:54,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:52:54,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:52:54,114 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:52:54,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 12:52:54,215 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 12:52:54,215 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:52:54,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 12:52:54,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:52:54,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 12:52:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:54,428 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:52:54,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:52:54,559 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 77 treesize of output 69 [2024-11-13 12:52:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:54,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786744041] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:52:54,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:52:54,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2024-11-13 12:52:54,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266776713] [2024-11-13 12:52:54,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:52:54,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 12:52:54,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:52:54,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 12:52:54,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:52:54,804 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:52:54,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 87 transitions, 803 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:54,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:52:54,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:52:54,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:52:55,473 INFO L124 PetriNetUnfolderBase]: 271/513 cut-off events. [2024-11-13 12:52:55,473 INFO L125 PetriNetUnfolderBase]: For 1632/1632 co-relation queries the response was YES. [2024-11-13 12:52:55,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2524 conditions, 513 events. 271/513 cut-off events. For 1632/1632 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2244 event pairs, 0 based on Foata normal form. 1/514 useless extension candidates. Maximal degree in co-relation 2351. Up to 273 conditions per place. [2024-11-13 12:52:55,483 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 74 selfloop transitions, 56 changer transitions 8/139 dead transitions. [2024-11-13 12:52:55,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1386 flow [2024-11-13 12:52:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 12:52:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 12:52:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2024-11-13 12:52:55,485 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-11-13 12:52:55,485 INFO L175 Difference]: Start difference. First operand has 78 places, 87 transitions, 803 flow. Second operand 14 states and 110 transitions. [2024-11-13 12:52:55,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1386 flow [2024-11-13 12:52:55,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 139 transitions, 1328 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-13 12:52:55,504 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 1096 flow [2024-11-13 12:52:55,504 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1096, PETRI_PLACES=89, PETRI_TRANSITIONS=106} [2024-11-13 12:52:55,507 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 68 predicate places. [2024-11-13 12:52:55,507 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 1096 flow [2024-11-13 12:52:55,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:55,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:52:55,507 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:52:55,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 12:52:55,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:52:55,708 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:52:55,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:52:55,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1407643300, now seen corresponding path program 4 times [2024-11-13 12:52:55,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:52:55,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851143701] [2024-11-13 12:52:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:52:55,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:52:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:52:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:56,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:52:56,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851143701] [2024-11-13 12:52:56,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851143701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:52:56,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690329446] [2024-11-13 12:52:56,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:52:56,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:52:56,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:52:56,120 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:52:56,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 12:52:56,215 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:52:56,215 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:52:56,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 12:52:56,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:52:56,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 12:52:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:56,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:52:56,526 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:52:56,527 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 48 treesize of output 33 [2024-11-13 12:52:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:56,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690329446] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:52:56,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:52:56,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-11-13 12:52:56,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505141754] [2024-11-13 12:52:56,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:52:56,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 12:52:56,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:52:56,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 12:52:56,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:52:56,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:52:56,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 1096 flow. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:56,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:52:56,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:52:56,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:52:57,151 INFO L124 PetriNetUnfolderBase]: 261/501 cut-off events. [2024-11-13 12:52:57,151 INFO L125 PetriNetUnfolderBase]: For 2151/2151 co-relation queries the response was YES. [2024-11-13 12:52:57,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2721 conditions, 501 events. 261/501 cut-off events. For 2151/2151 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2200 event pairs, 26 based on Foata normal form. 2/503 useless extension candidates. Maximal degree in co-relation 2651. Up to 366 conditions per place. [2024-11-13 12:52:57,156 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 73 selfloop transitions, 46 changer transitions 5/125 dead transitions. [2024-11-13 12:52:57,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 125 transitions, 1448 flow [2024-11-13 12:52:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 12:52:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 12:52:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2024-11-13 12:52:57,157 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-13 12:52:57,158 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 1096 flow. Second operand 9 states and 78 transitions. [2024-11-13 12:52:57,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 125 transitions, 1448 flow [2024-11-13 12:52:57,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 125 transitions, 1345 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-11-13 12:52:57,174 INFO L231 Difference]: Finished difference. Result has 88 places, 107 transitions, 1135 flow [2024-11-13 12:52:57,174 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1135, PETRI_PLACES=88, PETRI_TRANSITIONS=107} [2024-11-13 12:52:57,175 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2024-11-13 12:52:57,175 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 107 transitions, 1135 flow [2024-11-13 12:52:57,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:57,175 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:52:57,175 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:52:57,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 12:52:57,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:52:57,383 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:52:57,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:52:57,383 INFO L85 PathProgramCache]: Analyzing trace with hash 2050109146, now seen corresponding path program 5 times [2024-11-13 12:52:57,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:52:57,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522737322] [2024-11-13 12:52:57,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:52:57,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:52:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:52:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:57,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:52:57,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522737322] [2024-11-13 12:52:57,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522737322] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:52:57,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930559269] [2024-11-13 12:52:57,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:52:57,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:52:57,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:52:57,698 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:52:57,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 12:52:57,926 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 12:52:57,926 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:52:57,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 12:52:57,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:52:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:52:58,012 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:52:58,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930559269] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:52:58,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:52:58,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2024-11-13 12:52:58,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099193077] [2024-11-13 12:52:58,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:52:58,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:52:58,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:52:58,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:52:58,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-13 12:52:58,014 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:52:58,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 107 transitions, 1135 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:58,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:52:58,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:52:58,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:52:58,307 INFO L124 PetriNetUnfolderBase]: 283/548 cut-off events. [2024-11-13 12:52:58,307 INFO L125 PetriNetUnfolderBase]: For 2443/2443 co-relation queries the response was YES. [2024-11-13 12:52:58,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3021 conditions, 548 events. 283/548 cut-off events. For 2443/2443 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2457 event pairs, 43 based on Foata normal form. 10/558 useless extension candidates. Maximal degree in co-relation 2901. Up to 216 conditions per place. [2024-11-13 12:52:58,333 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 93 selfloop transitions, 42 changer transitions 0/136 dead transitions. [2024-11-13 12:52:58,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 136 transitions, 1633 flow [2024-11-13 12:52:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:52:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 12:52:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-11-13 12:52:58,334 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-11-13 12:52:58,335 INFO L175 Difference]: Start difference. First operand has 88 places, 107 transitions, 1135 flow. Second operand 5 states and 59 transitions. [2024-11-13 12:52:58,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 136 transitions, 1633 flow [2024-11-13 12:52:58,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 136 transitions, 1540 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-11-13 12:52:58,349 INFO L231 Difference]: Finished difference. Result has 89 places, 114 transitions, 1279 flow [2024-11-13 12:52:58,349 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1279, PETRI_PLACES=89, PETRI_TRANSITIONS=114} [2024-11-13 12:52:58,350 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 68 predicate places. [2024-11-13 12:52:58,350 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 114 transitions, 1279 flow [2024-11-13 12:52:58,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:58,350 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:52:58,350 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:52:58,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 12:52:58,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 12:52:58,551 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:52:58,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:52:58,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1444656533, now seen corresponding path program 2 times [2024-11-13 12:52:58,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:52:58,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232658508] [2024-11-13 12:52:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:52:58,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:52:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:52:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:52:58,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:52:58,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232658508] [2024-11-13 12:52:58,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232658508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:52:58,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985367875] [2024-11-13 12:52:58,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:52:58,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:52:58,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:52:58,941 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:52:58,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 12:52:59,108 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:52:59,108 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:52:59,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:52:59,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:52:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:52:59,186 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:52:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:52:59,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985367875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:52:59,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:52:59,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-13 12:52:59,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941101429] [2024-11-13 12:52:59,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:52:59,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 12:52:59,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:52:59,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 12:52:59,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:52:59,391 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:52:59,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 1279 flow. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:59,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:52:59,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:52:59,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:00,607 INFO L124 PetriNetUnfolderBase]: 401/805 cut-off events. [2024-11-13 12:53:00,607 INFO L125 PetriNetUnfolderBase]: For 4027/4027 co-relation queries the response was YES. [2024-11-13 12:53:00,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4359 conditions, 805 events. 401/805 cut-off events. For 4027/4027 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4175 event pairs, 56 based on Foata normal form. 21/825 useless extension candidates. Maximal degree in co-relation 4233. Up to 257 conditions per place. [2024-11-13 12:53:00,618 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 127 selfloop transitions, 94 changer transitions 0/222 dead transitions. [2024-11-13 12:53:00,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 222 transitions, 2463 flow [2024-11-13 12:53:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 12:53:00,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-13 12:53:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 183 transitions. [2024-11-13 12:53:00,621 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-11-13 12:53:00,621 INFO L175 Difference]: Start difference. First operand has 89 places, 114 transitions, 1279 flow. Second operand 20 states and 183 transitions. [2024-11-13 12:53:00,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 222 transitions, 2463 flow [2024-11-13 12:53:00,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 222 transitions, 2381 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-11-13 12:53:00,655 INFO L231 Difference]: Finished difference. Result has 116 places, 159 transitions, 2012 flow [2024-11-13 12:53:00,656 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2012, PETRI_PLACES=116, PETRI_TRANSITIONS=159} [2024-11-13 12:53:00,656 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 95 predicate places. [2024-11-13 12:53:00,657 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 159 transitions, 2012 flow [2024-11-13 12:53:00,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:00,657 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:00,657 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:00,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 12:53:00,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 12:53:00,858 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:00,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:00,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1417624668, now seen corresponding path program 6 times [2024-11-13 12:53:00,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:00,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045658781] [2024-11-13 12:53:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:00,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:53:01,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:01,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045658781] [2024-11-13 12:53:01,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045658781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:01,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835554131] [2024-11-13 12:53:01,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:53:01,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:01,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:01,157 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:01,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 12:53:01,263 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-13 12:53:01,263 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:01,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-13 12:53:01,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:01,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 12:53:01,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:53:01,611 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 24 treesize of output 18 [2024-11-13 12:53:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:53:01,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:02,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-11-13 12:53:02,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:53:02,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2024-11-13 12:53:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:53:04,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835554131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:04,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:04,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2024-11-13 12:53:04,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147067059] [2024-11-13 12:53:04,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:04,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 12:53:04,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:04,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 12:53:04,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-11-13 12:53:04,670 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:04,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 159 transitions, 2012 flow. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:04,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:04,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:04,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:07,813 INFO L124 PetriNetUnfolderBase]: 465/1004 cut-off events. [2024-11-13 12:53:07,813 INFO L125 PetriNetUnfolderBase]: For 7121/7121 co-relation queries the response was YES. [2024-11-13 12:53:07,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5977 conditions, 1004 events. 465/1004 cut-off events. For 7121/7121 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5991 event pairs, 22 based on Foata normal form. 34/1037 useless extension candidates. Maximal degree in co-relation 5859. Up to 231 conditions per place. [2024-11-13 12:53:07,827 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 145 selfloop transitions, 77 changer transitions 79/302 dead transitions. [2024-11-13 12:53:07,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 302 transitions, 3684 flow [2024-11-13 12:53:07,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-13 12:53:07,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-13 12:53:07,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 300 transitions. [2024-11-13 12:53:07,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-11-13 12:53:07,830 INFO L175 Difference]: Start difference. First operand has 116 places, 159 transitions, 2012 flow. Second operand 35 states and 300 transitions. [2024-11-13 12:53:07,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 302 transitions, 3684 flow [2024-11-13 12:53:07,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 302 transitions, 3525 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-11-13 12:53:07,885 INFO L231 Difference]: Finished difference. Result has 154 places, 156 transitions, 2004 flow [2024-11-13 12:53:07,886 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2004, PETRI_PLACES=154, PETRI_TRANSITIONS=156} [2024-11-13 12:53:07,887 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 133 predicate places. [2024-11-13 12:53:07,887 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 156 transitions, 2004 flow [2024-11-13 12:53:07,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:07,887 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:07,887 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:07,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 12:53:08,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 12:53:08,088 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:08,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:08,088 INFO L85 PathProgramCache]: Analyzing trace with hash -760352372, now seen corresponding path program 7 times [2024-11-13 12:53:08,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:08,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239654882] [2024-11-13 12:53:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:08,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:53:08,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:08,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239654882] [2024-11-13 12:53:08,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239654882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:08,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081104510] [2024-11-13 12:53:08,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:53:08,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:08,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:08,246 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:08,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 12:53:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:08,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 12:53:08,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:08,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 12:53:08,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 12:53:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:53:08,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:09,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-13 12:53:09,328 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 12:53:09,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 41 [2024-11-13 12:53:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:53:09,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081104510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:09,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:09,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-13 12:53:09,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120324705] [2024-11-13 12:53:09,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:09,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 12:53:09,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:09,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 12:53:09,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-11-13 12:53:09,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:09,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 156 transitions, 2004 flow. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:09,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:09,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:09,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:10,852 INFO L124 PetriNetUnfolderBase]: 338/745 cut-off events. [2024-11-13 12:53:10,852 INFO L125 PetriNetUnfolderBase]: For 5242/5242 co-relation queries the response was YES. [2024-11-13 12:53:10,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4576 conditions, 745 events. 338/745 cut-off events. For 5242/5242 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4137 event pairs, 15 based on Foata normal form. 4/748 useless extension candidates. Maximal degree in co-relation 4456. Up to 245 conditions per place. [2024-11-13 12:53:10,862 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 141 selfloop transitions, 67 changer transitions 7/216 dead transitions. [2024-11-13 12:53:10,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 216 transitions, 2728 flow [2024-11-13 12:53:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 12:53:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-13 12:53:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 198 transitions. [2024-11-13 12:53:10,865 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-11-13 12:53:10,865 INFO L175 Difference]: Start difference. First operand has 154 places, 156 transitions, 2004 flow. Second operand 27 states and 198 transitions. [2024-11-13 12:53:10,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 216 transitions, 2728 flow [2024-11-13 12:53:10,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 216 transitions, 2446 flow, removed 115 selfloop flow, removed 13 redundant places. [2024-11-13 12:53:10,909 INFO L231 Difference]: Finished difference. Result has 155 places, 152 transitions, 1812 flow [2024-11-13 12:53:10,909 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1812, PETRI_PLACES=155, PETRI_TRANSITIONS=152} [2024-11-13 12:53:10,910 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 134 predicate places. [2024-11-13 12:53:10,910 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 152 transitions, 1812 flow [2024-11-13 12:53:10,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:10,911 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:10,911 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:10,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 12:53:11,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:11,115 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:11,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:11,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1053719371, now seen corresponding path program 3 times [2024-11-13 12:53:11,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:11,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944214187] [2024-11-13 12:53:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:11,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:11,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:11,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944214187] [2024-11-13 12:53:11,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944214187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:11,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186453763] [2024-11-13 12:53:11,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:53:11,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:11,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:11,320 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:11,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 12:53:11,456 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 12:53:11,457 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:11,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:53:11,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:11,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:11,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186453763] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:11,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:11,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-13 12:53:11,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950430841] [2024-11-13 12:53:11,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:11,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 12:53:11,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:11,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 12:53:11,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:53:11,767 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:11,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 152 transitions, 1812 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:11,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:11,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:11,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:12,573 INFO L124 PetriNetUnfolderBase]: 336/708 cut-off events. [2024-11-13 12:53:12,574 INFO L125 PetriNetUnfolderBase]: For 4230/4230 co-relation queries the response was YES. [2024-11-13 12:53:12,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 708 events. 336/708 cut-off events. For 4230/4230 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3737 event pairs, 50 based on Foata normal form. 18/725 useless extension candidates. Maximal degree in co-relation 4008. Up to 228 conditions per place. [2024-11-13 12:53:12,583 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 111 selfloop transitions, 83 changer transitions 0/195 dead transitions. [2024-11-13 12:53:12,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 195 transitions, 2398 flow [2024-11-13 12:53:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 12:53:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-13 12:53:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 143 transitions. [2024-11-13 12:53:12,585 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-11-13 12:53:12,586 INFO L175 Difference]: Start difference. First operand has 155 places, 152 transitions, 1812 flow. Second operand 15 states and 143 transitions. [2024-11-13 12:53:12,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 195 transitions, 2398 flow [2024-11-13 12:53:12,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 195 transitions, 2282 flow, removed 12 selfloop flow, removed 15 redundant places. [2024-11-13 12:53:12,618 INFO L231 Difference]: Finished difference. Result has 152 places, 154 transitions, 1920 flow [2024-11-13 12:53:12,618 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1920, PETRI_PLACES=152, PETRI_TRANSITIONS=154} [2024-11-13 12:53:12,619 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 131 predicate places. [2024-11-13 12:53:12,619 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 154 transitions, 1920 flow [2024-11-13 12:53:12,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:12,619 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:12,619 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:12,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 12:53:12,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:12,824 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:12,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1007140431, now seen corresponding path program 4 times [2024-11-13 12:53:12,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:12,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557489859] [2024-11-13 12:53:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:12,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:13,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:13,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557489859] [2024-11-13 12:53:13,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557489859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:13,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599250268] [2024-11-13 12:53:13,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:53:13,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:13,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:13,028 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:13,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 12:53:13,181 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:53:13,181 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:13,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:53:13,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:13,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:13,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599250268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:13,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:13,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-13 12:53:13,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119871449] [2024-11-13 12:53:13,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:13,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 12:53:13,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 12:53:13,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:53:13,418 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:13,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 154 transitions, 1920 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:13,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:13,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:13,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:14,195 INFO L124 PetriNetUnfolderBase]: 523/1032 cut-off events. [2024-11-13 12:53:14,195 INFO L125 PetriNetUnfolderBase]: For 7843/7843 co-relation queries the response was YES. [2024-11-13 12:53:14,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6491 conditions, 1032 events. 523/1032 cut-off events. For 7843/7843 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5674 event pairs, 92 based on Foata normal form. 16/1047 useless extension candidates. Maximal degree in co-relation 6365. Up to 540 conditions per place. [2024-11-13 12:53:14,212 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 141 selfloop transitions, 116 changer transitions 3/261 dead transitions. [2024-11-13 12:53:14,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 261 transitions, 3636 flow [2024-11-13 12:53:14,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 12:53:14,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 12:53:14,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 132 transitions. [2024-11-13 12:53:14,214 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-11-13 12:53:14,214 INFO L175 Difference]: Start difference. First operand has 152 places, 154 transitions, 1920 flow. Second operand 14 states and 132 transitions. [2024-11-13 12:53:14,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 261 transitions, 3636 flow [2024-11-13 12:53:14,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 261 transitions, 3462 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-11-13 12:53:14,269 INFO L231 Difference]: Finished difference. Result has 162 places, 210 transitions, 2966 flow [2024-11-13 12:53:14,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2966, PETRI_PLACES=162, PETRI_TRANSITIONS=210} [2024-11-13 12:53:14,270 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 141 predicate places. [2024-11-13 12:53:14,271 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 210 transitions, 2966 flow [2024-11-13 12:53:14,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:14,271 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:14,271 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:14,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 12:53:14,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 12:53:14,472 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:14,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:14,472 INFO L85 PathProgramCache]: Analyzing trace with hash -222496794, now seen corresponding path program 8 times [2024-11-13 12:53:14,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:14,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296416214] [2024-11-13 12:53:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:14,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:53:14,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:14,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296416214] [2024-11-13 12:53:14,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296416214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:14,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245239780] [2024-11-13 12:53:14,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:53:14,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:14,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:14,604 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:14,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 12:53:14,710 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:53:14,710 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:14,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 12:53:14,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:14,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 12:53:14,975 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 12:53:14,975 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2024-11-13 12:53:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:53:15,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:15,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 116 [2024-11-13 12:53:15,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:53:15,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 298 treesize of output 240 [2024-11-13 12:53:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:53:17,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245239780] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:17,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:17,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-11-13 12:53:17,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934575803] [2024-11-13 12:53:17,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:17,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 12:53:17,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:17,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 12:53:17,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-13 12:53:17,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:17,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 210 transitions, 2966 flow. Second operand has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:17,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:17,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:17,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:18,520 INFO L124 PetriNetUnfolderBase]: 598/1158 cut-off events. [2024-11-13 12:53:18,520 INFO L125 PetriNetUnfolderBase]: For 11275/11275 co-relation queries the response was YES. [2024-11-13 12:53:18,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8002 conditions, 1158 events. 598/1158 cut-off events. For 11275/11275 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6386 event pairs, 23 based on Foata normal form. 8/1165 useless extension candidates. Maximal degree in co-relation 7815. Up to 470 conditions per place. [2024-11-13 12:53:18,539 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 169 selfloop transitions, 114 changer transitions 50/334 dead transitions. [2024-11-13 12:53:18,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 334 transitions, 4951 flow [2024-11-13 12:53:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 12:53:18,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-13 12:53:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 245 transitions. [2024-11-13 12:53:18,545 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3712121212121212 [2024-11-13 12:53:18,546 INFO L175 Difference]: Start difference. First operand has 162 places, 210 transitions, 2966 flow. Second operand 33 states and 245 transitions. [2024-11-13 12:53:18,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 334 transitions, 4951 flow [2024-11-13 12:53:18,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 334 transitions, 4395 flow, removed 255 selfloop flow, removed 9 redundant places. [2024-11-13 12:53:18,645 INFO L231 Difference]: Finished difference. Result has 192 places, 226 transitions, 3250 flow [2024-11-13 12:53:18,646 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3250, PETRI_PLACES=192, PETRI_TRANSITIONS=226} [2024-11-13 12:53:18,647 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 171 predicate places. [2024-11-13 12:53:18,648 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 226 transitions, 3250 flow [2024-11-13 12:53:18,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:18,648 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:18,648 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:18,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 12:53:18,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:18,849 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:18,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1657663345, now seen corresponding path program 5 times [2024-11-13 12:53:18,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:18,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939943999] [2024-11-13 12:53:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:18,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:19,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:19,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939943999] [2024-11-13 12:53:19,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939943999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:19,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080553268] [2024-11-13 12:53:19,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:53:19,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:19,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:19,013 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:19,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 12:53:19,182 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:53:19,182 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:19,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:53:19,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:19,241 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:19,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080553268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:19,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:19,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-13 12:53:19,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103894421] [2024-11-13 12:53:19,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:19,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 12:53:19,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:19,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 12:53:19,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:53:19,371 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:19,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 226 transitions, 3250 flow. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:19,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:19,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:19,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:20,128 INFO L124 PetriNetUnfolderBase]: 560/1049 cut-off events. [2024-11-13 12:53:20,128 INFO L125 PetriNetUnfolderBase]: For 9463/9463 co-relation queries the response was YES. [2024-11-13 12:53:20,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7250 conditions, 1049 events. 560/1049 cut-off events. For 9463/9463 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5571 event pairs, 72 based on Foata normal form. 21/1069 useless extension candidates. Maximal degree in co-relation 7174. Up to 417 conditions per place. [2024-11-13 12:53:20,145 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 156 selfloop transitions, 124 changer transitions 3/284 dead transitions. [2024-11-13 12:53:20,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 284 transitions, 4401 flow [2024-11-13 12:53:20,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 12:53:20,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-13 12:53:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 133 transitions. [2024-11-13 12:53:20,149 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-11-13 12:53:20,149 INFO L175 Difference]: Start difference. First operand has 192 places, 226 transitions, 3250 flow. Second operand 16 states and 133 transitions. [2024-11-13 12:53:20,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 284 transitions, 4401 flow [2024-11-13 12:53:20,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 284 transitions, 3935 flow, removed 194 selfloop flow, removed 16 redundant places. [2024-11-13 12:53:20,204 INFO L231 Difference]: Finished difference. Result has 164 places, 235 transitions, 3288 flow [2024-11-13 12:53:20,205 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2813, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3288, PETRI_PLACES=164, PETRI_TRANSITIONS=235} [2024-11-13 12:53:20,205 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 143 predicate places. [2024-11-13 12:53:20,205 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 235 transitions, 3288 flow [2024-11-13 12:53:20,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:20,205 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:20,206 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:20,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 12:53:20,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 12:53:20,406 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:20,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:20,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1085788671, now seen corresponding path program 6 times [2024-11-13 12:53:20,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:20,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971454296] [2024-11-13 12:53:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:20,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:20,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:20,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971454296] [2024-11-13 12:53:20,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971454296] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:20,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222232935] [2024-11-13 12:53:20,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:53:20,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:20,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:20,647 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:20,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 12:53:20,834 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-13 12:53:20,835 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:20,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:53:20,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:20,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:21,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222232935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:21,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:21,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-13 12:53:21,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228482820] [2024-11-13 12:53:21,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:21,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 12:53:21,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:21,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 12:53:21,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:53:21,055 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:21,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 235 transitions, 3288 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:21,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:21,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:21,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:21,812 INFO L124 PetriNetUnfolderBase]: 552/1039 cut-off events. [2024-11-13 12:53:21,812 INFO L125 PetriNetUnfolderBase]: For 9420/9420 co-relation queries the response was YES. [2024-11-13 12:53:21,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7186 conditions, 1039 events. 552/1039 cut-off events. For 9420/9420 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5564 event pairs, 92 based on Foata normal form. 15/1053 useless extension candidates. Maximal degree in co-relation 7113. Up to 616 conditions per place. [2024-11-13 12:53:21,827 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 158 selfloop transitions, 117 changer transitions 2/278 dead transitions. [2024-11-13 12:53:21,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 278 transitions, 4144 flow [2024-11-13 12:53:21,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 12:53:21,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-13 12:53:21,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 136 transitions. [2024-11-13 12:53:21,829 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-11-13 12:53:21,829 INFO L175 Difference]: Start difference. First operand has 164 places, 235 transitions, 3288 flow. Second operand 16 states and 136 transitions. [2024-11-13 12:53:21,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 278 transitions, 4144 flow [2024-11-13 12:53:21,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 278 transitions, 4037 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-11-13 12:53:21,882 INFO L231 Difference]: Finished difference. Result has 175 places, 236 transitions, 3488 flow [2024-11-13 12:53:21,882 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3122, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3488, PETRI_PLACES=175, PETRI_TRANSITIONS=236} [2024-11-13 12:53:21,883 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2024-11-13 12:53:21,883 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 236 transitions, 3488 flow [2024-11-13 12:53:21,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:21,883 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:21,883 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:21,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-13 12:53:22,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 12:53:22,084 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:22,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:22,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1066522059, now seen corresponding path program 7 times [2024-11-13 12:53:22,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:22,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527159006] [2024-11-13 12:53:22,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:22,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:22,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:22,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527159006] [2024-11-13 12:53:22,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527159006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:22,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314503937] [2024-11-13 12:53:22,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:53:22,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:22,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:22,293 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:22,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 12:53:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:22,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:53:22,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:22,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:22,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314503937] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:22,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:22,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-13 12:53:22,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147990816] [2024-11-13 12:53:22,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:22,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 12:53:22,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:22,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 12:53:22,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:53:22,735 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:22,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 236 transitions, 3488 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:22,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:22,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:22,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:23,580 INFO L124 PetriNetUnfolderBase]: 816/1565 cut-off events. [2024-11-13 12:53:23,580 INFO L125 PetriNetUnfolderBase]: For 15861/15861 co-relation queries the response was YES. [2024-11-13 12:53:23,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10858 conditions, 1565 events. 816/1565 cut-off events. For 15861/15861 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9148 event pairs, 49 based on Foata normal form. 14/1578 useless extension candidates. Maximal degree in co-relation 10783. Up to 544 conditions per place. [2024-11-13 12:53:23,595 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 190 selfloop transitions, 200 changer transitions 0/391 dead transitions. [2024-11-13 12:53:23,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 391 transitions, 6059 flow [2024-11-13 12:53:23,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 12:53:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-13 12:53:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 149 transitions. [2024-11-13 12:53:23,597 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49666666666666665 [2024-11-13 12:53:23,598 INFO L175 Difference]: Start difference. First operand has 175 places, 236 transitions, 3488 flow. Second operand 15 states and 149 transitions. [2024-11-13 12:53:23,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 391 transitions, 6059 flow [2024-11-13 12:53:23,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 391 transitions, 5895 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-11-13 12:53:23,723 INFO L231 Difference]: Finished difference. Result has 187 places, 313 transitions, 5142 flow [2024-11-13 12:53:23,724 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5142, PETRI_PLACES=187, PETRI_TRANSITIONS=313} [2024-11-13 12:53:23,725 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 166 predicate places. [2024-11-13 12:53:23,725 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 313 transitions, 5142 flow [2024-11-13 12:53:23,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:23,726 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:23,726 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:23,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 12:53:23,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:23,930 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:23,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:23,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1959529351, now seen corresponding path program 8 times [2024-11-13 12:53:23,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:23,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632324212] [2024-11-13 12:53:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:23,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:24,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:24,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632324212] [2024-11-13 12:53:24,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632324212] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:24,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237480523] [2024-11-13 12:53:24,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:53:24,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:24,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:24,214 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:24,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 12:53:24,344 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:53:24,345 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:24,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:53:24,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:24,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:24,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237480523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:24,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:24,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-13 12:53:24,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659064249] [2024-11-13 12:53:24,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:24,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 12:53:24,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:24,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 12:53:24,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:53:24,551 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:24,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 313 transitions, 5142 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:24,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:24,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:24,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:25,429 INFO L124 PetriNetUnfolderBase]: 815/1556 cut-off events. [2024-11-13 12:53:25,429 INFO L125 PetriNetUnfolderBase]: For 20494/20494 co-relation queries the response was YES. [2024-11-13 12:53:25,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11990 conditions, 1556 events. 815/1556 cut-off events. For 20494/20494 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 9034 event pairs, 51 based on Foata normal form. 9/1564 useless extension candidates. Maximal degree in co-relation 11908. Up to 556 conditions per place. [2024-11-13 12:53:25,446 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 181 selfloop transitions, 202 changer transitions 0/384 dead transitions. [2024-11-13 12:53:25,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 384 transitions, 6663 flow [2024-11-13 12:53:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 12:53:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-13 12:53:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 143 transitions. [2024-11-13 12:53:25,448 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-11-13 12:53:25,448 INFO L175 Difference]: Start difference. First operand has 187 places, 313 transitions, 5142 flow. Second operand 16 states and 143 transitions. [2024-11-13 12:53:25,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 384 transitions, 6663 flow [2024-11-13 12:53:25,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 384 transitions, 6421 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-11-13 12:53:25,655 INFO L231 Difference]: Finished difference. Result has 202 places, 317 transitions, 5564 flow [2024-11-13 12:53:25,656 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4852, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5564, PETRI_PLACES=202, PETRI_TRANSITIONS=317} [2024-11-13 12:53:25,656 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 181 predicate places. [2024-11-13 12:53:25,656 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 317 transitions, 5564 flow [2024-11-13 12:53:25,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:25,657 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:25,657 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:25,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-13 12:53:25,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:25,857 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:25,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:25,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1881475757, now seen corresponding path program 9 times [2024-11-13 12:53:25,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:25,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12040590] [2024-11-13 12:53:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:25,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:26,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:26,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12040590] [2024-11-13 12:53:26,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12040590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:26,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400672903] [2024-11-13 12:53:26,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:53:26,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:26,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:26,003 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:26,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 12:53:26,146 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 12:53:26,146 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:26,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:53:26,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:26,226 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:26,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400672903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:26,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:26,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-13 12:53:26,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957729962] [2024-11-13 12:53:26,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:26,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 12:53:26,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:26,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 12:53:26,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:53:26,469 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:26,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 317 transitions, 5564 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:26,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:26,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:26,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:27,487 INFO L124 PetriNetUnfolderBase]: 910/1747 cut-off events. [2024-11-13 12:53:27,487 INFO L125 PetriNetUnfolderBase]: For 26118/26118 co-relation queries the response was YES. [2024-11-13 12:53:27,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13976 conditions, 1747 events. 910/1747 cut-off events. For 26118/26118 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10373 event pairs, 30 based on Foata normal form. 6/1752 useless extension candidates. Maximal degree in co-relation 13891. Up to 472 conditions per place. [2024-11-13 12:53:27,504 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 231 selfloop transitions, 184 changer transitions 0/416 dead transitions. [2024-11-13 12:53:27,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 416 transitions, 7686 flow [2024-11-13 12:53:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 12:53:27,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 12:53:27,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 160 transitions. [2024-11-13 12:53:27,506 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-11-13 12:53:27,506 INFO L175 Difference]: Start difference. First operand has 202 places, 317 transitions, 5564 flow. Second operand 17 states and 160 transitions. [2024-11-13 12:53:27,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 416 transitions, 7686 flow [2024-11-13 12:53:27,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 416 transitions, 7546 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-11-13 12:53:27,701 INFO L231 Difference]: Finished difference. Result has 212 places, 327 transitions, 6069 flow [2024-11-13 12:53:27,701 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5376, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6069, PETRI_PLACES=212, PETRI_TRANSITIONS=327} [2024-11-13 12:53:27,702 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 191 predicate places. [2024-11-13 12:53:27,702 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 327 transitions, 6069 flow [2024-11-13 12:53:27,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:27,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:27,702 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:27,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 12:53:27,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:27,903 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:27,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash 272578007, now seen corresponding path program 1 times [2024-11-13 12:53:27,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:27,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045484666] [2024-11-13 12:53:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:27,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:28,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:28,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045484666] [2024-11-13 12:53:28,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045484666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:28,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116754665] [2024-11-13 12:53:28,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:28,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:28,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:28,157 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:28,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 12:53:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:28,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:53:28,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:28,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:33,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116754665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:33,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:33,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2024-11-13 12:53:33,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423278812] [2024-11-13 12:53:33,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:33,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 12:53:33,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:33,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 12:53:33,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2024-11-13 12:53:33,017 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:33,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 327 transitions, 6069 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:33,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:33,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:33,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:41,255 INFO L124 PetriNetUnfolderBase]: 820/1612 cut-off events. [2024-11-13 12:53:41,256 INFO L125 PetriNetUnfolderBase]: For 27617/27617 co-relation queries the response was YES. [2024-11-13 12:53:41,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13218 conditions, 1612 events. 820/1612 cut-off events. For 27617/27617 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9636 event pairs, 104 based on Foata normal form. 51/1662 useless extension candidates. Maximal degree in co-relation 13131. Up to 462 conditions per place. [2024-11-13 12:53:41,279 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 187 selfloop transitions, 157 changer transitions 12/357 dead transitions. [2024-11-13 12:53:41,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 357 transitions, 6998 flow [2024-11-13 12:53:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 12:53:41,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 12:53:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-11-13 12:53:41,281 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-11-13 12:53:41,281 INFO L175 Difference]: Start difference. First operand has 212 places, 327 transitions, 6069 flow. Second operand 9 states and 86 transitions. [2024-11-13 12:53:41,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 357 transitions, 6998 flow [2024-11-13 12:53:41,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 357 transitions, 6691 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-11-13 12:53:41,492 INFO L231 Difference]: Finished difference. Result has 215 places, 323 transitions, 6083 flow [2024-11-13 12:53:41,493 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5417, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6083, PETRI_PLACES=215, PETRI_TRANSITIONS=323} [2024-11-13 12:53:41,493 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 194 predicate places. [2024-11-13 12:53:41,494 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 323 transitions, 6083 flow [2024-11-13 12:53:41,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:41,494 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:41,494 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:41,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-13 12:53:41,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:41,698 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:41,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash -820845392, now seen corresponding path program 9 times [2024-11-13 12:53:41,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:41,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067168916] [2024-11-13 12:53:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:41,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:41,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:41,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067168916] [2024-11-13 12:53:41,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067168916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:41,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567842781] [2024-11-13 12:53:41,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:53:41,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:41,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:41,949 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:41,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 12:53:42,076 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 12:53:42,076 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:42,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 12:53:42,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:42,154 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:42,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567842781] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:42,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:53:42,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 13 [2024-11-13 12:53:42,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031883675] [2024-11-13 12:53:42,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:53:42,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:53:42,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:42,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:53:42,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:53:42,310 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:42,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 323 transitions, 6083 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:42,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:42,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:42,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:42,760 INFO L124 PetriNetUnfolderBase]: 815/1626 cut-off events. [2024-11-13 12:53:42,760 INFO L125 PetriNetUnfolderBase]: For 26279/26279 co-relation queries the response was YES. [2024-11-13 12:53:42,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13582 conditions, 1626 events. 815/1626 cut-off events. For 26279/26279 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9854 event pairs, 41 based on Foata normal form. 5/1630 useless extension candidates. Maximal degree in co-relation 13495. Up to 988 conditions per place. [2024-11-13 12:53:42,775 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 241 selfloop transitions, 101 changer transitions 0/343 dead transitions. [2024-11-13 12:53:42,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 343 transitions, 6992 flow [2024-11-13 12:53:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:53:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 12:53:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2024-11-13 12:53:42,776 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-11-13 12:53:42,776 INFO L175 Difference]: Start difference. First operand has 215 places, 323 transitions, 6083 flow. Second operand 5 states and 57 transitions. [2024-11-13 12:53:42,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 343 transitions, 6992 flow [2024-11-13 12:53:42,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 343 transitions, 6756 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-11-13 12:53:42,908 INFO L231 Difference]: Finished difference. Result has 212 places, 331 transitions, 6410 flow [2024-11-13 12:53:42,908 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5800, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6410, PETRI_PLACES=212, PETRI_TRANSITIONS=331} [2024-11-13 12:53:42,909 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 191 predicate places. [2024-11-13 12:53:42,909 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 331 transitions, 6410 flow [2024-11-13 12:53:42,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:42,909 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:42,910 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:42,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 12:53:43,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 12:53:43,110 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:43,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:43,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1453379874, now seen corresponding path program 10 times [2024-11-13 12:53:43,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:43,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465582096] [2024-11-13 12:53:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:43,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:43,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:43,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465582096] [2024-11-13 12:53:43,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465582096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:43,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882132014] [2024-11-13 12:53:43,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:53:43,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:43,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:43,303 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:43,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 12:53:43,458 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:53:43,458 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:43,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 12:53:43,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:43,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:43,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882132014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:43,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:43,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-13 12:53:43,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206036310] [2024-11-13 12:53:43,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:43,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 12:53:43,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:43,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 12:53:43,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:53:43,812 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:43,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 331 transitions, 6410 flow. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:43,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:43,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:43,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:45,138 INFO L124 PetriNetUnfolderBase]: 823/1646 cut-off events. [2024-11-13 12:53:45,139 INFO L125 PetriNetUnfolderBase]: For 27844/27844 co-relation queries the response was YES. [2024-11-13 12:53:45,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13801 conditions, 1646 events. 823/1646 cut-off events. For 27844/27844 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10047 event pairs, 98 based on Foata normal form. 12/1657 useless extension candidates. Maximal degree in co-relation 13714. Up to 479 conditions per place. [2024-11-13 12:53:45,151 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 191 selfloop transitions, 187 changer transitions 2/381 dead transitions. [2024-11-13 12:53:45,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 381 transitions, 7517 flow [2024-11-13 12:53:45,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 12:53:45,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 12:53:45,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 136 transitions. [2024-11-13 12:53:45,152 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-13 12:53:45,152 INFO L175 Difference]: Start difference. First operand has 212 places, 331 transitions, 6410 flow. Second operand 17 states and 136 transitions. [2024-11-13 12:53:45,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 381 transitions, 7517 flow [2024-11-13 12:53:45,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 381 transitions, 7507 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-11-13 12:53:45,294 INFO L231 Difference]: Finished difference. Result has 232 places, 335 transitions, 6849 flow [2024-11-13 12:53:45,294 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6400, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6849, PETRI_PLACES=232, PETRI_TRANSITIONS=335} [2024-11-13 12:53:45,295 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 211 predicate places. [2024-11-13 12:53:45,295 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 335 transitions, 6849 flow [2024-11-13 12:53:45,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:45,295 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:45,295 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:45,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 12:53:45,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 12:53:45,496 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:45,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:45,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1893930772, now seen corresponding path program 10 times [2024-11-13 12:53:45,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:45,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047843812] [2024-11-13 12:53:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:45,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:45,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:45,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047843812] [2024-11-13 12:53:45,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047843812] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:45,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626595909] [2024-11-13 12:53:45,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:53:45,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:45,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:45,714 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:45,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 12:53:45,855 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:53:45,855 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:45,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 12:53:45,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:45,968 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:46,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626595909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:46,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:46,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2024-11-13 12:53:46,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641461267] [2024-11-13 12:53:46,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:46,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 12:53:46,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:46,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 12:53:46,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:53:46,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:46,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 335 transitions, 6849 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:46,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:46,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:46,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:47,341 INFO L124 PetriNetUnfolderBase]: 906/1834 cut-off events. [2024-11-13 12:53:47,341 INFO L125 PetriNetUnfolderBase]: For 34975/34975 co-relation queries the response was YES. [2024-11-13 12:53:47,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16009 conditions, 1834 events. 906/1834 cut-off events. For 34975/34975 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11649 event pairs, 150 based on Foata normal form. 27/1860 useless extension candidates. Maximal degree in co-relation 15917. Up to 775 conditions per place. [2024-11-13 12:53:47,356 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 264 selfloop transitions, 154 changer transitions 2/421 dead transitions. [2024-11-13 12:53:47,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 421 transitions, 8791 flow [2024-11-13 12:53:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 12:53:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-13 12:53:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 166 transitions. [2024-11-13 12:53:47,358 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-11-13 12:53:47,358 INFO L175 Difference]: Start difference. First operand has 232 places, 335 transitions, 6849 flow. Second operand 18 states and 166 transitions. [2024-11-13 12:53:47,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 421 transitions, 8791 flow [2024-11-13 12:53:47,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 421 transitions, 8395 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-11-13 12:53:47,545 INFO L231 Difference]: Finished difference. Result has 250 places, 366 transitions, 7660 flow [2024-11-13 12:53:47,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6428, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7660, PETRI_PLACES=250, PETRI_TRANSITIONS=366} [2024-11-13 12:53:47,545 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 229 predicate places. [2024-11-13 12:53:47,545 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 366 transitions, 7660 flow [2024-11-13 12:53:47,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:47,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:47,546 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:47,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 12:53:47,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-13 12:53:47,747 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:47,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:47,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1631040266, now seen corresponding path program 11 times [2024-11-13 12:53:47,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:47,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555313927] [2024-11-13 12:53:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:47,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:47,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:47,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555313927] [2024-11-13 12:53:47,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555313927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:47,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666512465] [2024-11-13 12:53:47,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:53:47,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:47,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:47,958 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:47,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 12:53:48,111 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:53:48,111 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:48,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 12:53:48,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:48,176 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:48,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666512465] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:48,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:48,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-13 12:53:48,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260104746] [2024-11-13 12:53:48,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:48,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 12:53:48,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:48,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 12:53:48,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:53:48,448 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:48,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 366 transitions, 7660 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:48,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:48,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:48,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:51,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:53:52,127 INFO L124 PetriNetUnfolderBase]: 943/1891 cut-off events. [2024-11-13 12:53:52,127 INFO L125 PetriNetUnfolderBase]: For 37244/37244 co-relation queries the response was YES. [2024-11-13 12:53:52,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16853 conditions, 1891 events. 943/1891 cut-off events. For 37244/37244 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11947 event pairs, 137 based on Foata normal form. 22/1912 useless extension candidates. Maximal degree in co-relation 16753. Up to 639 conditions per place. [2024-11-13 12:53:52,146 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 287 selfloop transitions, 131 changer transitions 2/421 dead transitions. [2024-11-13 12:53:52,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 421 transitions, 9126 flow [2024-11-13 12:53:52,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 12:53:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-13 12:53:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 133 transitions. [2024-11-13 12:53:52,148 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-11-13 12:53:52,148 INFO L175 Difference]: Start difference. First operand has 250 places, 366 transitions, 7660 flow. Second operand 16 states and 133 transitions. [2024-11-13 12:53:52,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 421 transitions, 9126 flow [2024-11-13 12:53:52,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 421 transitions, 8935 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-11-13 12:53:52,342 INFO L231 Difference]: Finished difference. Result has 258 places, 371 transitions, 7844 flow [2024-11-13 12:53:52,342 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7417, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7844, PETRI_PLACES=258, PETRI_TRANSITIONS=371} [2024-11-13 12:53:52,343 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2024-11-13 12:53:52,343 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 371 transitions, 7844 flow [2024-11-13 12:53:52,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:52,343 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:52,343 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:52,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 12:53:52,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-13 12:53:52,544 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:52,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:52,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1549259930, now seen corresponding path program 11 times [2024-11-13 12:53:52,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:52,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137212132] [2024-11-13 12:53:52,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:52,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:52,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:52,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137212132] [2024-11-13 12:53:52,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137212132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:52,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308345387] [2024-11-13 12:53:52,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:53:52,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:52,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:52,737 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:52,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 12:53:52,994 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:53:52,994 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:52,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 12:53:52,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:53,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:53,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308345387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:53,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:53,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-13 12:53:53,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198652970] [2024-11-13 12:53:53,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:53,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 12:53:53,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:53,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 12:53:53,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:53:53,288 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:53,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 371 transitions, 7844 flow. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:53,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:53,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:53,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:54,599 INFO L124 PetriNetUnfolderBase]: 947/1905 cut-off events. [2024-11-13 12:53:54,599 INFO L125 PetriNetUnfolderBase]: For 36374/36374 co-relation queries the response was YES. [2024-11-13 12:53:54,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17185 conditions, 1905 events. 947/1905 cut-off events. For 36374/36374 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12145 event pairs, 126 based on Foata normal form. 15/1919 useless extension candidates. Maximal degree in co-relation 17085. Up to 609 conditions per place. [2024-11-13 12:53:54,618 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 228 selfloop transitions, 193 changer transitions 1/423 dead transitions. [2024-11-13 12:53:54,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 423 transitions, 9039 flow [2024-11-13 12:53:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 12:53:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-13 12:53:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 150 transitions. [2024-11-13 12:53:54,619 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-13 12:53:54,619 INFO L175 Difference]: Start difference. First operand has 258 places, 371 transitions, 7844 flow. Second operand 18 states and 150 transitions. [2024-11-13 12:53:54,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 423 transitions, 9039 flow [2024-11-13 12:53:54,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 423 transitions, 8863 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-11-13 12:53:54,831 INFO L231 Difference]: Finished difference. Result has 266 places, 375 transitions, 8134 flow [2024-11-13 12:53:54,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7650, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8134, PETRI_PLACES=266, PETRI_TRANSITIONS=375} [2024-11-13 12:53:54,832 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 245 predicate places. [2024-11-13 12:53:54,832 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 375 transitions, 8134 flow [2024-11-13 12:53:54,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:54,832 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:54,832 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:54,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 12:53:55,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-13 12:53:55,033 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:55,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:55,033 INFO L85 PathProgramCache]: Analyzing trace with hash -362835486, now seen corresponding path program 12 times [2024-11-13 12:53:55,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:55,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054248688] [2024-11-13 12:53:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:55,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:55,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:55,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054248688] [2024-11-13 12:53:55,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054248688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:55,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017829096] [2024-11-13 12:53:55,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:53:55,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:55,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:55,269 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:55,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 12:53:55,391 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-13 12:53:55,391 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:55,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 12:53:55,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:55,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:55,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017829096] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:55,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:55,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-13 12:53:55,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809216333] [2024-11-13 12:53:55,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:55,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 12:53:55,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:55,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 12:53:55,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:53:55,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:55,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 375 transitions, 8134 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:55,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:55,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:55,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:53:57,417 INFO L124 PetriNetUnfolderBase]: 962/1958 cut-off events. [2024-11-13 12:53:57,417 INFO L125 PetriNetUnfolderBase]: For 39600/39600 co-relation queries the response was YES. [2024-11-13 12:53:57,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17813 conditions, 1958 events. 962/1958 cut-off events. For 39600/39600 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12701 event pairs, 208 based on Foata normal form. 4/1961 useless extension candidates. Maximal degree in co-relation 17711. Up to 960 conditions per place. [2024-11-13 12:53:57,444 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 335 selfloop transitions, 77 changer transitions 5/418 dead transitions. [2024-11-13 12:53:57,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 418 transitions, 9466 flow [2024-11-13 12:53:57,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 12:53:57,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 12:53:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 114 transitions. [2024-11-13 12:53:57,446 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-11-13 12:53:57,446 INFO L175 Difference]: Start difference. First operand has 266 places, 375 transitions, 8134 flow. Second operand 14 states and 114 transitions. [2024-11-13 12:53:57,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 418 transitions, 9466 flow [2024-11-13 12:53:57,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 418 transitions, 9057 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-11-13 12:53:57,719 INFO L231 Difference]: Finished difference. Result has 271 places, 374 transitions, 7930 flow [2024-11-13 12:53:57,720 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7716, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7930, PETRI_PLACES=271, PETRI_TRANSITIONS=374} [2024-11-13 12:53:57,720 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 250 predicate places. [2024-11-13 12:53:57,720 INFO L471 AbstractCegarLoop]: Abstraction has has 271 places, 374 transitions, 7930 flow [2024-11-13 12:53:57,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:57,720 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:53:57,720 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:57,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 12:53:57,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-13 12:53:57,921 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:53:57,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:57,922 INFO L85 PathProgramCache]: Analyzing trace with hash -191838462, now seen corresponding path program 13 times [2024-11-13 12:53:57,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:57,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295572979] [2024-11-13 12:53:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:57,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:58,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:58,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295572979] [2024-11-13 12:53:58,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295572979] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:58,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130715053] [2024-11-13 12:53:58,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:53:58,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:58,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:58,128 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:58,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 12:53:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:58,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 12:53:58,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:58,318 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:53:58,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130715053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:58,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:58,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2024-11-13 12:53:58,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320928861] [2024-11-13 12:53:58,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:58,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 12:53:58,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:58,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 12:53:58,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:53:58,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:53:58,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 374 transitions, 7930 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:58,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:53:58,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:53:58,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:54:02,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:54:06,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:54:07,255 INFO L124 PetriNetUnfolderBase]: 956/1938 cut-off events. [2024-11-13 12:54:07,255 INFO L125 PetriNetUnfolderBase]: For 38785/38785 co-relation queries the response was YES. [2024-11-13 12:54:07,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17362 conditions, 1938 events. 956/1938 cut-off events. For 38785/38785 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12472 event pairs, 210 based on Foata normal form. 2/1939 useless extension candidates. Maximal degree in co-relation 17260. Up to 1001 conditions per place. [2024-11-13 12:54:07,270 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 318 selfloop transitions, 71 changer transitions 5/395 dead transitions. [2024-11-13 12:54:07,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 395 transitions, 8939 flow [2024-11-13 12:54:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 12:54:07,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 12:54:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 70 transitions. [2024-11-13 12:54:07,271 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-11-13 12:54:07,271 INFO L175 Difference]: Start difference. First operand has 271 places, 374 transitions, 7930 flow. Second operand 9 states and 70 transitions. [2024-11-13 12:54:07,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 395 transitions, 8939 flow [2024-11-13 12:54:07,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 395 transitions, 8758 flow, removed 19 selfloop flow, removed 13 redundant places. [2024-11-13 12:54:07,444 INFO L231 Difference]: Finished difference. Result has 264 places, 370 transitions, 7789 flow [2024-11-13 12:54:07,444 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7735, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7789, PETRI_PLACES=264, PETRI_TRANSITIONS=370} [2024-11-13 12:54:07,445 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 243 predicate places. [2024-11-13 12:54:07,445 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 370 transitions, 7789 flow [2024-11-13 12:54:07,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:54:07,445 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:54:07,445 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:54:07,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 12:54:07,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-13 12:54:07,645 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:54:07,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:54:07,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1345250516, now seen corresponding path program 14 times [2024-11-13 12:54:07,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:54:07,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380966322] [2024-11-13 12:54:07,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:54:07,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:54:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:54:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:54:07,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:54:07,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380966322] [2024-11-13 12:54:07,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380966322] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:54:07,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752025995] [2024-11-13 12:54:07,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:54:07,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:54:07,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:54:07,795 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:54:07,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 12:54:07,896 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:54:07,896 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:54:07,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:54:07,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:54:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:54:07,941 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:54:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:54:08,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752025995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:54:08,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:54:08,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-13 12:54:08,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458385631] [2024-11-13 12:54:08,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:54:08,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 12:54:08,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:54:08,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 12:54:08,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:54:08,043 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:54:08,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 370 transitions, 7789 flow. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:54:08,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:54:08,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:54:08,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:54:08,913 INFO L124 PetriNetUnfolderBase]: 956/1923 cut-off events. [2024-11-13 12:54:08,913 INFO L125 PetriNetUnfolderBase]: For 40196/40196 co-relation queries the response was YES. [2024-11-13 12:54:08,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17279 conditions, 1923 events. 956/1923 cut-off events. For 40196/40196 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12218 event pairs, 359 based on Foata normal form. 10/1932 useless extension candidates. Maximal degree in co-relation 17181. Up to 1749 conditions per place. [2024-11-13 12:54:08,932 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 340 selfloop transitions, 49 changer transitions 0/390 dead transitions. [2024-11-13 12:54:08,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 390 transitions, 8721 flow [2024-11-13 12:54:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 12:54:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 12:54:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2024-11-13 12:54:08,933 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-11-13 12:54:08,933 INFO L175 Difference]: Start difference. First operand has 264 places, 370 transitions, 7789 flow. Second operand 10 states and 84 transitions. [2024-11-13 12:54:08,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 390 transitions, 8721 flow [2024-11-13 12:54:09,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 390 transitions, 8391 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-11-13 12:54:09,143 INFO L231 Difference]: Finished difference. Result has 258 places, 371 transitions, 7603 flow [2024-11-13 12:54:09,144 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7418, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7603, PETRI_PLACES=258, PETRI_TRANSITIONS=371} [2024-11-13 12:54:09,144 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2024-11-13 12:54:09,144 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 371 transitions, 7603 flow [2024-11-13 12:54:09,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:54:09,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:54:09,145 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:54:09,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-13 12:54:09,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:54:09,345 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:54:09,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:54:09,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1135796840, now seen corresponding path program 2 times [2024-11-13 12:54:09,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:54:09,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970936210] [2024-11-13 12:54:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:54:09,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:54:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:54:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:54:09,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:54:09,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970936210] [2024-11-13 12:54:09,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970936210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:54:09,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941169938] [2024-11-13 12:54:09,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:54:09,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:54:09,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:54:09,665 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:54:09,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 12:54:09,814 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:54:09,814 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:54:09,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 12:54:09,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:54:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:54:09,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:54:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:54:10,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941169938] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:54:10,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:54:10,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2024-11-13 12:54:10,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211876403] [2024-11-13 12:54:10,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:54:10,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 12:54:10,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:54:10,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 12:54:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:54:10,397 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:54:10,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 371 transitions, 7603 flow. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:54:10,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:54:10,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:54:10,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:54:16,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:54:20,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:54:24,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:54:28,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:54:30,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:54:33,175 INFO L124 PetriNetUnfolderBase]: 1755/3669 cut-off events. [2024-11-13 12:54:33,175 INFO L125 PetriNetUnfolderBase]: For 76134/76134 co-relation queries the response was YES. [2024-11-13 12:54:33,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31415 conditions, 3669 events. 1755/3669 cut-off events. For 76134/76134 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 27688 event pairs, 160 based on Foata normal form. 74/3742 useless extension candidates. Maximal degree in co-relation 31319. Up to 953 conditions per place. [2024-11-13 12:54:33,216 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 383 selfloop transitions, 341 changer transitions 1/726 dead transitions. [2024-11-13 12:54:33,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 726 transitions, 14837 flow [2024-11-13 12:54:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-13 12:54:33,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-11-13 12:54:33,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 408 transitions. [2024-11-13 12:54:33,218 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4434782608695652 [2024-11-13 12:54:33,218 INFO L175 Difference]: Start difference. First operand has 258 places, 371 transitions, 7603 flow. Second operand 46 states and 408 transitions. [2024-11-13 12:54:33,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 726 transitions, 14837 flow [2024-11-13 12:54:33,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 726 transitions, 14735 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-11-13 12:54:33,652 INFO L231 Difference]: Finished difference. Result has 322 places, 554 transitions, 12896 flow [2024-11-13 12:54:33,653 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7512, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=12896, PETRI_PLACES=322, PETRI_TRANSITIONS=554} [2024-11-13 12:54:33,653 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 301 predicate places. [2024-11-13 12:54:33,653 INFO L471 AbstractCegarLoop]: Abstraction has has 322 places, 554 transitions, 12896 flow [2024-11-13 12:54:33,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:54:33,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:54:33,653 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:54:33,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-13 12:54:33,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-13 12:54:33,854 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:54:33,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:54:33,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2097266533, now seen corresponding path program 3 times [2024-11-13 12:54:33,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:54:33,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194257148] [2024-11-13 12:54:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:54:33,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:54:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:54:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:54:35,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:54:35,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194257148] [2024-11-13 12:54:35,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194257148] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:54:35,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549791765] [2024-11-13 12:54:35,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:54:35,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:54:35,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:54:35,524 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:54:35,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 12:54:35,640 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 12:54:35,641 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:54:35,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 12:54:35,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:54:36,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:54:36,223 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-11-13 12:54:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:54:36,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:54:36,786 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-13 12:54:36,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-13 12:54:36,891 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-13 12:54:36,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-11-13 12:54:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:54:36,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549791765] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:54:36,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:54:36,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-11-13 12:54:36,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94292201] [2024-11-13 12:54:36,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:54:36,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 12:54:36,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:54:36,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 12:54:36,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2024-11-13 12:54:36,970 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:54:36,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 554 transitions, 12896 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:54:36,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:54:36,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:54:36,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:54:40,094 INFO L124 PetriNetUnfolderBase]: 1799/3762 cut-off events. [2024-11-13 12:54:40,095 INFO L125 PetriNetUnfolderBase]: For 84472/84472 co-relation queries the response was YES. [2024-11-13 12:54:40,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35102 conditions, 3762 events. 1799/3762 cut-off events. For 84472/84472 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28314 event pairs, 146 based on Foata normal form. 8/3768 useless extension candidates. Maximal degree in co-relation 34890. Up to 3241 conditions per place. [2024-11-13 12:54:40,125 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 536 selfloop transitions, 114 changer transitions 11/662 dead transitions. [2024-11-13 12:54:40,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 662 transitions, 15694 flow [2024-11-13 12:54:40,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 12:54:40,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-13 12:54:40,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 190 transitions. [2024-11-13 12:54:40,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-11-13 12:54:40,127 INFO L175 Difference]: Start difference. First operand has 322 places, 554 transitions, 12896 flow. Second operand 22 states and 190 transitions. [2024-11-13 12:54:40,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 662 transitions, 15694 flow [2024-11-13 12:54:40,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 662 transitions, 14239 flow, removed 611 selfloop flow, removed 10 redundant places. [2024-11-13 12:54:40,784 INFO L231 Difference]: Finished difference. Result has 339 places, 592 transitions, 12614 flow [2024-11-13 12:54:40,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11516, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12614, PETRI_PLACES=339, PETRI_TRANSITIONS=592} [2024-11-13 12:54:40,785 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 318 predicate places. [2024-11-13 12:54:40,786 INFO L471 AbstractCegarLoop]: Abstraction has has 339 places, 592 transitions, 12614 flow [2024-11-13 12:54:40,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:54:40,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:54:40,786 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:54:40,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 12:54:40,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-13 12:54:40,987 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:54:40,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:54:40,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1328950773, now seen corresponding path program 4 times [2024-11-13 12:54:40,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:54:40,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003727237] [2024-11-13 12:54:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:54:40,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:54:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:54:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:54:42,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:54:42,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003727237] [2024-11-13 12:54:42,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003727237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:54:42,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379918118] [2024-11-13 12:54:42,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:54:42,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:54:42,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:54:42,725 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:54:42,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 12:54:42,827 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:54:42,827 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:54:42,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-13 12:54:42,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:54:42,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 12:54:43,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:54:43,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 79 [2024-11-13 12:54:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:54:43,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:54:44,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 90 [2024-11-13 12:54:44,438 INFO L349 Elim1Store]: treesize reduction 5, result has 95.2 percent of original size [2024-11-13 12:54:44,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 392 treesize of output 351 [2024-11-13 12:54:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:54:48,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379918118] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:54:48,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:54:48,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2024-11-13 12:54:48,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574701541] [2024-11-13 12:54:48,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:54:48,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 12:54:48,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:54:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 12:54:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2024-11-13 12:54:48,575 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:54:48,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 592 transitions, 12614 flow. Second operand has 29 states, 29 states have (on average 4.413793103448276) internal successors, (128), 29 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:54:48,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:54:48,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:54:48,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:54:52,518 INFO L124 PetriNetUnfolderBase]: 1987/4118 cut-off events. [2024-11-13 12:54:52,518 INFO L125 PetriNetUnfolderBase]: For 83614/83614 co-relation queries the response was YES. [2024-11-13 12:54:52,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36315 conditions, 4118 events. 1987/4118 cut-off events. For 83614/83614 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31218 event pairs, 165 based on Foata normal form. 4/4121 useless extension candidates. Maximal degree in co-relation 36098. Up to 3422 conditions per place. [2024-11-13 12:54:52,739 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 596 selfloop transitions, 164 changer transitions 14/775 dead transitions. [2024-11-13 12:54:52,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 775 transitions, 17139 flow [2024-11-13 12:54:52,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 12:54:52,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-13 12:54:52,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 247 transitions. [2024-11-13 12:54:52,740 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45740740740740743 [2024-11-13 12:54:52,740 INFO L175 Difference]: Start difference. First operand has 339 places, 592 transitions, 12614 flow. Second operand 27 states and 247 transitions. [2024-11-13 12:54:52,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 775 transitions, 17139 flow [2024-11-13 12:54:53,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 775 transitions, 16849 flow, removed 124 selfloop flow, removed 5 redundant places. [2024-11-13 12:54:53,391 INFO L231 Difference]: Finished difference. Result has 371 places, 680 transitions, 14890 flow [2024-11-13 12:54:53,392 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=12442, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14890, PETRI_PLACES=371, PETRI_TRANSITIONS=680} [2024-11-13 12:54:53,393 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 350 predicate places. [2024-11-13 12:54:53,393 INFO L471 AbstractCegarLoop]: Abstraction has has 371 places, 680 transitions, 14890 flow [2024-11-13 12:54:53,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.413793103448276) internal successors, (128), 29 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:54:53,393 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:54:53,393 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:54:53,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-13 12:54:53,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:54:53,594 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:54:53,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:54:53,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1407599013, now seen corresponding path program 5 times [2024-11-13 12:54:53,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:54:53,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765430947] [2024-11-13 12:54:53,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:54:53,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:54:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:54:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:54:54,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:54:54,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765430947] [2024-11-13 12:54:54,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765430947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:54:54,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732888970] [2024-11-13 12:54:54,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:54:54,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:54:54,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:54:54,974 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:54:54,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-13 12:54:55,100 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:54:55,100 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:54:55,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 12:54:55,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:54:55,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:54:55,589 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-11-13 12:54:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:54:55,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:54:56,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:54:56,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 152 [2024-11-13 12:54:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:54:56,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732888970] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:54:56,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:54:56,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2024-11-13 12:54:56,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584935298] [2024-11-13 12:54:56,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:54:56,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 12:54:56,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:54:56,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 12:54:56,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2024-11-13 12:54:56,817 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:54:56,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 680 transitions, 14890 flow. Second operand has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:54:56,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:54:56,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:54:56,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:55:02,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:55:04,463 INFO L124 PetriNetUnfolderBase]: 2004/4137 cut-off events. [2024-11-13 12:55:04,463 INFO L125 PetriNetUnfolderBase]: For 87624/87624 co-relation queries the response was YES. [2024-11-13 12:55:04,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37206 conditions, 4137 events. 2004/4137 cut-off events. For 87624/87624 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 31320 event pairs, 146 based on Foata normal form. 9/4146 useless extension candidates. Maximal degree in co-relation 36978. Up to 3535 conditions per place. [2024-11-13 12:55:04,532 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 604 selfloop transitions, 149 changer transitions 22/776 dead transitions. [2024-11-13 12:55:04,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 776 transitions, 17490 flow [2024-11-13 12:55:04,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 12:55:04,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-13 12:55:04,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 240 transitions. [2024-11-13 12:55:04,534 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-11-13 12:55:04,534 INFO L175 Difference]: Start difference. First operand has 371 places, 680 transitions, 14890 flow. Second operand 27 states and 240 transitions. [2024-11-13 12:55:04,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 776 transitions, 17490 flow [2024-11-13 12:55:05,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 776 transitions, 17286 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-11-13 12:55:05,476 INFO L231 Difference]: Finished difference. Result has 396 places, 689 transitions, 15273 flow [2024-11-13 12:55:05,477 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=14660, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=15273, PETRI_PLACES=396, PETRI_TRANSITIONS=689} [2024-11-13 12:55:05,478 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 375 predicate places. [2024-11-13 12:55:05,478 INFO L471 AbstractCegarLoop]: Abstraction has has 396 places, 689 transitions, 15273 flow [2024-11-13 12:55:05,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:05,478 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:55:05,478 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:55:05,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-13 12:55:05,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:05,679 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:55:05,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:55:05,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1866905009, now seen corresponding path program 6 times [2024-11-13 12:55:05,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:55:05,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464484070] [2024-11-13 12:55:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:05,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:55:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:55:07,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:55:07,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464484070] [2024-11-13 12:55:07,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464484070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:55:07,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52690565] [2024-11-13 12:55:07,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:55:07,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:07,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:55:07,010 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:55:07,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-13 12:55:07,113 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-13 12:55:07,113 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:55:07,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 12:55:07,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:55:07,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:55:07,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2024-11-13 12:55:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:55:07,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:55:08,048 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-13 12:55:08,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-13 12:55:08,138 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-13 12:55:08,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-11-13 12:55:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:55:08,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52690565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:55:08,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:55:08,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-11-13 12:55:08,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319013949] [2024-11-13 12:55:08,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:55:08,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 12:55:08,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:55:08,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 12:55:08,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2024-11-13 12:55:08,201 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:55:08,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 689 transitions, 15273 flow. Second operand has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:08,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:55:08,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:55:08,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:55:11,083 INFO L124 PetriNetUnfolderBase]: 2008/4139 cut-off events. [2024-11-13 12:55:11,083 INFO L125 PetriNetUnfolderBase]: For 89891/89891 co-relation queries the response was YES. [2024-11-13 12:55:11,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37740 conditions, 4139 events. 2008/4139 cut-off events. For 89891/89891 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 31203 event pairs, 184 based on Foata normal form. 2/4141 useless extension candidates. Maximal degree in co-relation 37506. Up to 3711 conditions per place. [2024-11-13 12:55:11,137 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 627 selfloop transitions, 108 changer transitions 8/744 dead transitions. [2024-11-13 12:55:11,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 744 transitions, 17457 flow [2024-11-13 12:55:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 12:55:11,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-13 12:55:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 154 transitions. [2024-11-13 12:55:11,138 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.385 [2024-11-13 12:55:11,138 INFO L175 Difference]: Start difference. First operand has 396 places, 689 transitions, 15273 flow. Second operand 20 states and 154 transitions. [2024-11-13 12:55:11,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 744 transitions, 17457 flow [2024-11-13 12:55:12,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 744 transitions, 17080 flow, removed 53 selfloop flow, removed 20 redundant places. [2024-11-13 12:55:12,128 INFO L231 Difference]: Finished difference. Result has 397 places, 709 transitions, 15684 flow [2024-11-13 12:55:12,129 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=14896, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=15684, PETRI_PLACES=397, PETRI_TRANSITIONS=709} [2024-11-13 12:55:12,130 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 376 predicate places. [2024-11-13 12:55:12,130 INFO L471 AbstractCegarLoop]: Abstraction has has 397 places, 709 transitions, 15684 flow [2024-11-13 12:55:12,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:12,130 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:55:12,130 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:55:12,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-13 12:55:12,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:12,331 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:55:12,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:55:12,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1568593111, now seen corresponding path program 7 times [2024-11-13 12:55:12,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:55:12,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853929956] [2024-11-13 12:55:12,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:12,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:55:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:55:13,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:55:13,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853929956] [2024-11-13 12:55:13,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853929956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:55:13,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049626494] [2024-11-13 12:55:13,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:55:13,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:13,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:55:13,736 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:55:13,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-13 12:55:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:13,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 12:55:13,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:55:14,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:55:14,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 75 [2024-11-13 12:55:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:55:14,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:55:14,819 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-13 12:55:14,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-13 12:55:14,943 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-13 12:55:14,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-11-13 12:55:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:55:15,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049626494] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:55:15,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:55:15,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-11-13 12:55:15,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585910937] [2024-11-13 12:55:15,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:55:15,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 12:55:15,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:55:15,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 12:55:15,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2024-11-13 12:55:15,022 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:55:15,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 709 transitions, 15684 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:15,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:55:15,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:55:15,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:55:18,459 INFO L124 PetriNetUnfolderBase]: 2081/4279 cut-off events. [2024-11-13 12:55:18,459 INFO L125 PetriNetUnfolderBase]: For 94604/94604 co-relation queries the response was YES. [2024-11-13 12:55:18,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39141 conditions, 4279 events. 2081/4279 cut-off events. For 94604/94604 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 32428 event pairs, 185 based on Foata normal form. 3/4282 useless extension candidates. Maximal degree in co-relation 38905. Up to 3839 conditions per place. [2024-11-13 12:55:18,512 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 684 selfloop transitions, 116 changer transitions 13/814 dead transitions. [2024-11-13 12:55:18,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 814 transitions, 18858 flow [2024-11-13 12:55:18,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 12:55:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-13 12:55:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 231 transitions. [2024-11-13 12:55:18,514 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-11-13 12:55:18,514 INFO L175 Difference]: Start difference. First operand has 397 places, 709 transitions, 15684 flow. Second operand 28 states and 231 transitions. [2024-11-13 12:55:18,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 814 transitions, 18858 flow [2024-11-13 12:55:19,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 814 transitions, 18571 flow, removed 103 selfloop flow, removed 13 redundant places. [2024-11-13 12:55:19,395 INFO L231 Difference]: Finished difference. Result has 418 places, 748 transitions, 16782 flow [2024-11-13 12:55:19,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=15466, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=16782, PETRI_PLACES=418, PETRI_TRANSITIONS=748} [2024-11-13 12:55:19,396 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 397 predicate places. [2024-11-13 12:55:19,396 INFO L471 AbstractCegarLoop]: Abstraction has has 418 places, 748 transitions, 16782 flow [2024-11-13 12:55:19,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:19,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:55:19,397 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:55:19,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-13 12:55:19,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:19,598 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:55:19,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:55:19,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1647241351, now seen corresponding path program 8 times [2024-11-13 12:55:19,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:55:19,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199466597] [2024-11-13 12:55:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:19,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:55:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:55:20,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:55:20,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199466597] [2024-11-13 12:55:20,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199466597] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:55:20,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810265279] [2024-11-13 12:55:20,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:55:20,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:20,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:55:20,807 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:55:20,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-13 12:55:20,912 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:55:20,912 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:55:20,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 12:55:20,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:55:21,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:55:21,321 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-11-13 12:55:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:55:21,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:55:21,845 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-13 12:55:21,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-13 12:55:21,937 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-13 12:55:21,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-11-13 12:55:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:55:22,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810265279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:55:22,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:55:22,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-11-13 12:55:22,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499828634] [2024-11-13 12:55:22,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:55:22,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 12:55:22,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:55:22,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 12:55:22,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2024-11-13 12:55:22,003 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:55:22,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 748 transitions, 16782 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:22,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:55:22,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:55:22,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:55:25,463 INFO L124 PetriNetUnfolderBase]: 2078/4272 cut-off events. [2024-11-13 12:55:25,463 INFO L125 PetriNetUnfolderBase]: For 96412/96412 co-relation queries the response was YES. [2024-11-13 12:55:25,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39523 conditions, 4272 events. 2078/4272 cut-off events. For 96412/96412 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 32399 event pairs, 186 based on Foata normal form. 6/4278 useless extension candidates. Maximal degree in co-relation 39280. Up to 3857 conditions per place. [2024-11-13 12:55:25,548 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 683 selfloop transitions, 108 changer transitions 21/813 dead transitions. [2024-11-13 12:55:25,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 813 transitions, 18887 flow [2024-11-13 12:55:25,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 12:55:25,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-13 12:55:25,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 233 transitions. [2024-11-13 12:55:25,550 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4017241379310345 [2024-11-13 12:55:25,550 INFO L175 Difference]: Start difference. First operand has 418 places, 748 transitions, 16782 flow. Second operand 29 states and 233 transitions. [2024-11-13 12:55:25,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 813 transitions, 18887 flow [2024-11-13 12:55:26,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 813 transitions, 18594 flow, removed 87 selfloop flow, removed 17 redundant places. [2024-11-13 12:55:26,689 INFO L231 Difference]: Finished difference. Result has 434 places, 746 transitions, 16675 flow [2024-11-13 12:55:26,690 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=16489, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=16675, PETRI_PLACES=434, PETRI_TRANSITIONS=746} [2024-11-13 12:55:26,690 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 413 predicate places. [2024-11-13 12:55:26,690 INFO L471 AbstractCegarLoop]: Abstraction has has 434 places, 746 transitions, 16675 flow [2024-11-13 12:55:26,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:26,691 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:55:26,691 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:55:26,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-13 12:55:26,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:26,892 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:55:26,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:55:26,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1558240235, now seen corresponding path program 12 times [2024-11-13 12:55:26,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:55:26,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541262916] [2024-11-13 12:55:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:26,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:55:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:55:27,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:55:27,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541262916] [2024-11-13 12:55:27,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541262916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:55:27,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306002280] [2024-11-13 12:55:27,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:55:27,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:27,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:55:27,131 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:55:27,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-13 12:55:27,299 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-13 12:55:27,299 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:55:27,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 12:55:27,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:55:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:55:27,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:55:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:55:27,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306002280] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:55:27,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:55:27,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-13 12:55:27,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011272714] [2024-11-13 12:55:27,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:55:27,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 12:55:27,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:55:27,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 12:55:27,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:55:27,702 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:55:27,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 746 transitions, 16675 flow. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:27,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:55:27,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:55:27,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:55:31,777 INFO L124 PetriNetUnfolderBase]: 2125/4339 cut-off events. [2024-11-13 12:55:31,777 INFO L125 PetriNetUnfolderBase]: For 100651/100651 co-relation queries the response was YES. [2024-11-13 12:55:31,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40520 conditions, 4339 events. 2125/4339 cut-off events. For 100651/100651 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 32978 event pairs, 663 based on Foata normal form. 15/4354 useless extension candidates. Maximal degree in co-relation 40243. Up to 3254 conditions per place. [2024-11-13 12:55:31,848 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 604 selfloop transitions, 238 changer transitions 1/844 dead transitions. [2024-11-13 12:55:31,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 844 transitions, 19382 flow [2024-11-13 12:55:31,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-13 12:55:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-13 12:55:31,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 241 transitions. [2024-11-13 12:55:31,849 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40166666666666667 [2024-11-13 12:55:31,849 INFO L175 Difference]: Start difference. First operand has 434 places, 746 transitions, 16675 flow. Second operand 30 states and 241 transitions. [2024-11-13 12:55:31,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 844 transitions, 19382 flow [2024-11-13 12:55:32,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 844 transitions, 19067 flow, removed 72 selfloop flow, removed 22 redundant places. [2024-11-13 12:55:32,847 INFO L231 Difference]: Finished difference. Result has 442 places, 778 transitions, 17727 flow [2024-11-13 12:55:32,847 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=16373, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=17727, PETRI_PLACES=442, PETRI_TRANSITIONS=778} [2024-11-13 12:55:32,847 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 421 predicate places. [2024-11-13 12:55:32,848 INFO L471 AbstractCegarLoop]: Abstraction has has 442 places, 778 transitions, 17727 flow [2024-11-13 12:55:32,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:32,848 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:55:32,848 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:55:32,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-13 12:55:33,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:33,048 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:55:33,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:55:33,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1849838611, now seen corresponding path program 9 times [2024-11-13 12:55:33,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:55:33,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663376137] [2024-11-13 12:55:33,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:33,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:55:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:55:33,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:55:33,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663376137] [2024-11-13 12:55:33,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663376137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:55:33,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759880615] [2024-11-13 12:55:33,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:55:33,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:33,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:55:33,983 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:55:33,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-13 12:55:34,117 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 12:55:34,117 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:55:34,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 12:55:34,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:55:34,584 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:55:34,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2024-11-13 12:55:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:55:34,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:55:35,111 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-13 12:55:35,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-13 12:55:35,202 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-13 12:55:35,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-11-13 12:55:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:55:35,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759880615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:55:35,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:55:35,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 26 [2024-11-13 12:55:35,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122956486] [2024-11-13 12:55:35,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:55:35,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 12:55:35,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:55:35,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 12:55:35,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-11-13 12:55:35,309 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:55:35,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 778 transitions, 17727 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:35,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:55:35,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:55:35,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:55:39,307 INFO L124 PetriNetUnfolderBase]: 2393/4846 cut-off events. [2024-11-13 12:55:39,307 INFO L125 PetriNetUnfolderBase]: For 108089/108089 co-relation queries the response was YES. [2024-11-13 12:55:39,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45439 conditions, 4846 events. 2393/4846 cut-off events. For 108089/108089 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 37502 event pairs, 203 based on Foata normal form. 3/4849 useless extension candidates. Maximal degree in co-relation 45160. Up to 4122 conditions per place. [2024-11-13 12:55:39,444 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 805 selfloop transitions, 158 changer transitions 5/969 dead transitions. [2024-11-13 12:55:39,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 969 transitions, 22996 flow [2024-11-13 12:55:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 12:55:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-13 12:55:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 249 transitions. [2024-11-13 12:55:39,446 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37727272727272726 [2024-11-13 12:55:39,446 INFO L175 Difference]: Start difference. First operand has 442 places, 778 transitions, 17727 flow. Second operand 33 states and 249 transitions. [2024-11-13 12:55:39,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 969 transitions, 22996 flow [2024-11-13 12:55:41,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 969 transitions, 22183 flow, removed 299 selfloop flow, removed 14 redundant places. [2024-11-13 12:55:41,028 INFO L231 Difference]: Finished difference. Result has 471 places, 879 transitions, 20255 flow [2024-11-13 12:55:41,028 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=17219, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=20255, PETRI_PLACES=471, PETRI_TRANSITIONS=879} [2024-11-13 12:55:41,029 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 450 predicate places. [2024-11-13 12:55:41,029 INFO L471 AbstractCegarLoop]: Abstraction has has 471 places, 879 transitions, 20255 flow [2024-11-13 12:55:41,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:41,029 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:55:41,029 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:55:41,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-13 12:55:41,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-13 12:55:41,230 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:55:41,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:55:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1267040173, now seen corresponding path program 10 times [2024-11-13 12:55:41,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:55:41,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518799971] [2024-11-13 12:55:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:41,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:55:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:55:42,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:55:42,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518799971] [2024-11-13 12:55:42,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518799971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:55:42,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28713431] [2024-11-13 12:55:42,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:55:42,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:42,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:55:42,222 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:55:42,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-13 12:55:42,346 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:55:42,346 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:55:42,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-13 12:55:42,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:55:42,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 12:55:42,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:55:42,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 73 [2024-11-13 12:55:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:55:43,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:55:43,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 90 [2024-11-13 12:55:44,055 INFO L349 Elim1Store]: treesize reduction 5, result has 95.2 percent of original size [2024-11-13 12:55:44,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 406 treesize of output 335 [2024-11-13 12:55:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:55:46,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28713431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:55:46,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:55:46,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2024-11-13 12:55:46,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439581680] [2024-11-13 12:55:46,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:55:46,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 12:55:46,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:55:46,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 12:55:46,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2024-11-13 12:55:46,861 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:55:46,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 879 transitions, 20255 flow. Second operand has 31 states, 31 states have (on average 4.516129032258065) internal successors, (140), 31 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:46,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:55:46,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:55:46,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:55:52,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:55:56,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:55:58,484 INFO L124 PetriNetUnfolderBase]: 2491/5031 cut-off events. [2024-11-13 12:55:58,484 INFO L125 PetriNetUnfolderBase]: For 118130/118130 co-relation queries the response was YES. [2024-11-13 12:55:58,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47518 conditions, 5031 events. 2491/5031 cut-off events. For 118130/118130 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 39190 event pairs, 205 based on Foata normal form. 5/5036 useless extension candidates. Maximal degree in co-relation 47254. Up to 4340 conditions per place. [2024-11-13 12:55:58,580 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 837 selfloop transitions, 166 changer transitions 9/1013 dead transitions. [2024-11-13 12:55:58,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 1013 transitions, 24222 flow [2024-11-13 12:55:58,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 12:55:58,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-13 12:55:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 228 transitions. [2024-11-13 12:55:58,581 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-11-13 12:55:58,581 INFO L175 Difference]: Start difference. First operand has 471 places, 879 transitions, 20255 flow. Second operand 28 states and 228 transitions. [2024-11-13 12:55:58,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 1013 transitions, 24222 flow [2024-11-13 12:56:00,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 1013 transitions, 23920 flow, removed 120 selfloop flow, removed 13 redundant places. [2024-11-13 12:56:00,189 INFO L231 Difference]: Finished difference. Result has 495 places, 931 transitions, 21726 flow [2024-11-13 12:56:00,190 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=19987, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=879, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=21726, PETRI_PLACES=495, PETRI_TRANSITIONS=931} [2024-11-13 12:56:00,191 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 474 predicate places. [2024-11-13 12:56:00,191 INFO L471 AbstractCegarLoop]: Abstraction has has 495 places, 931 transitions, 21726 flow [2024-11-13 12:56:00,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.516129032258065) internal successors, (140), 31 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:00,191 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:56:00,191 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:56:00,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-13 12:56:00,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-13 12:56:00,392 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:56:00,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:56:00,392 INFO L85 PathProgramCache]: Analyzing trace with hash -490687887, now seen corresponding path program 11 times [2024-11-13 12:56:00,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:56:00,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942919919] [2024-11-13 12:56:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:56:00,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:56:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:56:01,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:56:01,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942919919] [2024-11-13 12:56:01,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942919919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:56:01,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61281561] [2024-11-13 12:56:01,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:56:01,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:01,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:56:01,189 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:56:01,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-13 12:56:01,289 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-13 12:56:01,289 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:56:01,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 12:56:01,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:56:01,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:56:01,603 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-11-13 12:56:01,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:56:01,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:56:02,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:56:02,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 133 treesize of output 158 [2024-11-13 12:56:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:56:02,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61281561] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:56:02,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:56:02,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 27 [2024-11-13 12:56:02,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650766157] [2024-11-13 12:56:02,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:56:02,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 12:56:02,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:56:02,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 12:56:02,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2024-11-13 12:56:02,436 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:56:02,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 931 transitions, 21726 flow. Second operand has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:02,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:56:02,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:56:02,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:56:06,688 INFO L124 PetriNetUnfolderBase]: 2547/5117 cut-off events. [2024-11-13 12:56:06,688 INFO L125 PetriNetUnfolderBase]: For 125020/125020 co-relation queries the response was YES. [2024-11-13 12:56:06,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49115 conditions, 5117 events. 2547/5117 cut-off events. For 125020/125020 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 39747 event pairs, 220 based on Foata normal form. 5/5122 useless extension candidates. Maximal degree in co-relation 48840. Up to 4680 conditions per place. [2024-11-13 12:56:06,762 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 884 selfloop transitions, 128 changer transitions 14/1027 dead transitions. [2024-11-13 12:56:06,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 1027 transitions, 24817 flow [2024-11-13 12:56:06,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-13 12:56:06,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-13 12:56:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 262 transitions. [2024-11-13 12:56:06,764 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-11-13 12:56:06,764 INFO L175 Difference]: Start difference. First operand has 495 places, 931 transitions, 21726 flow. Second operand 32 states and 262 transitions. [2024-11-13 12:56:06,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 1027 transitions, 24817 flow [2024-11-13 12:56:08,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 1027 transitions, 24587 flow, removed 81 selfloop flow, removed 11 redundant places. [2024-11-13 12:56:08,151 INFO L231 Difference]: Finished difference. Result has 525 places, 957 transitions, 22479 flow [2024-11-13 12:56:08,152 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=21498, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=803, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=22479, PETRI_PLACES=525, PETRI_TRANSITIONS=957} [2024-11-13 12:56:08,153 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 504 predicate places. [2024-11-13 12:56:08,153 INFO L471 AbstractCegarLoop]: Abstraction has has 525 places, 957 transitions, 22479 flow [2024-11-13 12:56:08,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:08,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:56:08,153 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:56:08,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-13 12:56:08,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-13 12:56:08,354 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:56:08,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:56:08,354 INFO L85 PathProgramCache]: Analyzing trace with hash -407570997, now seen corresponding path program 12 times [2024-11-13 12:56:08,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:56:08,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861195944] [2024-11-13 12:56:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:56:08,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:56:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:56:09,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:56:09,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861195944] [2024-11-13 12:56:09,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861195944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:56:09,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590550616] [2024-11-13 12:56:09,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:56:09,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:09,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:56:09,267 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:56:09,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-13 12:56:09,380 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-13 12:56:09,380 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:56:09,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 12:56:09,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:56:09,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:56:09,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2024-11-13 12:56:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:56:09,754 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:56:10,083 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-13 12:56:10,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-13 12:56:10,174 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-13 12:56:10,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-11-13 12:56:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:56:10,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590550616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:56:10,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:56:10,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 23 [2024-11-13 12:56:10,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247873080] [2024-11-13 12:56:10,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:56:10,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 12:56:10,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:56:10,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 12:56:10,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-11-13 12:56:10,272 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:56:10,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 957 transitions, 22479 flow. Second operand has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:10,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:56:10,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:56:10,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:56:13,372 INFO L124 PetriNetUnfolderBase]: 2540/5122 cut-off events. [2024-11-13 12:56:13,372 INFO L125 PetriNetUnfolderBase]: For 127524/127524 co-relation queries the response was YES. [2024-11-13 12:56:13,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49662 conditions, 5122 events. 2540/5122 cut-off events. For 127524/127524 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 39691 event pairs, 207 based on Foata normal form. 3/5125 useless extension candidates. Maximal degree in co-relation 49376. Up to 4673 conditions per place. [2024-11-13 12:56:13,443 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 866 selfloop transitions, 126 changer transitions 12/1005 dead transitions. [2024-11-13 12:56:13,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 1005 transitions, 24837 flow [2024-11-13 12:56:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 12:56:13,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-13 12:56:13,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 181 transitions. [2024-11-13 12:56:13,444 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3934782608695652 [2024-11-13 12:56:13,444 INFO L175 Difference]: Start difference. First operand has 525 places, 957 transitions, 22479 flow. Second operand 23 states and 181 transitions. [2024-11-13 12:56:13,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 1005 transitions, 24837 flow [2024-11-13 12:56:14,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 1005 transitions, 24407 flow, removed 64 selfloop flow, removed 28 redundant places. [2024-11-13 12:56:14,922 INFO L231 Difference]: Finished difference. Result has 523 places, 960 transitions, 22382 flow [2024-11-13 12:56:14,922 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=22053, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=22382, PETRI_PLACES=523, PETRI_TRANSITIONS=960} [2024-11-13 12:56:14,923 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 502 predicate places. [2024-11-13 12:56:14,923 INFO L471 AbstractCegarLoop]: Abstraction has has 523 places, 960 transitions, 22382 flow [2024-11-13 12:56:14,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:14,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:56:14,923 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:56:14,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-13 12:56:15,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:15,124 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:56:15,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:56:15,124 INFO L85 PathProgramCache]: Analyzing trace with hash -400722464, now seen corresponding path program 13 times [2024-11-13 12:56:15,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:56:15,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18269689] [2024-11-13 12:56:15,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:56:15,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:56:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:56:15,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:56:15,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18269689] [2024-11-13 12:56:15,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18269689] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:56:15,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002440331] [2024-11-13 12:56:15,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:56:15,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:15,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:56:15,309 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:56:15,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-13 12:56:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:15,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 12:56:15,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:56:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:56:15,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:56:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 12:56:15,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002440331] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:56:15,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:56:15,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2024-11-13 12:56:15,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531934902] [2024-11-13 12:56:15,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:56:15,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 12:56:15,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:56:15,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 12:56:15,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:56:15,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:56:15,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 960 transitions, 22382 flow. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:15,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:56:15,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:56:15,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:56:19,226 INFO L124 PetriNetUnfolderBase]: 2620/5281 cut-off events. [2024-11-13 12:56:19,227 INFO L125 PetriNetUnfolderBase]: For 136797/136797 co-relation queries the response was YES. [2024-11-13 12:56:19,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51440 conditions, 5281 events. 2620/5281 cut-off events. For 136797/136797 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 41231 event pairs, 41 based on Foata normal form. 20/5301 useless extension candidates. Maximal degree in co-relation 51151. Up to 2462 conditions per place. [2024-11-13 12:56:19,397 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 489 selfloop transitions, 613 changer transitions 3/1106 dead transitions. [2024-11-13 12:56:19,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 1106 transitions, 27448 flow [2024-11-13 12:56:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 12:56:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-13 12:56:19,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 229 transitions. [2024-11-13 12:56:19,399 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4089285714285714 [2024-11-13 12:56:19,399 INFO L175 Difference]: Start difference. First operand has 523 places, 960 transitions, 22382 flow. Second operand 28 states and 229 transitions. [2024-11-13 12:56:19,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 1106 transitions, 27448 flow [2024-11-13 12:56:21,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 1106 transitions, 27233 flow, removed 32 selfloop flow, removed 17 redundant places. [2024-11-13 12:56:21,394 INFO L231 Difference]: Finished difference. Result has 536 places, 1022 transitions, 25388 flow [2024-11-13 12:56:21,395 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=22159, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=25388, PETRI_PLACES=536, PETRI_TRANSITIONS=1022} [2024-11-13 12:56:21,395 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 515 predicate places. [2024-11-13 12:56:21,396 INFO L471 AbstractCegarLoop]: Abstraction has has 536 places, 1022 transitions, 25388 flow [2024-11-13 12:56:21,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:21,396 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:56:21,396 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:56:21,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-11-13 12:56:21,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-13 12:56:21,597 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:56:21,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:56:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1069785389, now seen corresponding path program 14 times [2024-11-13 12:56:21,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:56:21,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087416514] [2024-11-13 12:56:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:56:21,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:56:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:56:22,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:56:22,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087416514] [2024-11-13 12:56:22,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087416514] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:56:22,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566406762] [2024-11-13 12:56:22,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:56:22,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:22,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:56:22,810 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:56:22,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-13 12:56:23,060 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:56:23,060 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:56:23,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 12:56:23,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:56:23,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:56:23,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2024-11-13 12:56:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:56:23,655 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:56:24,086 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-13 12:56:24,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-13 12:56:24,223 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-13 12:56:24,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-11-13 12:56:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:56:24,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566406762] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:56:24,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:56:24,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 26 [2024-11-13 12:56:24,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601147742] [2024-11-13 12:56:24,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:56:24,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 12:56:24,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:56:24,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 12:56:24,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2024-11-13 12:56:24,279 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:56:24,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 1022 transitions, 25388 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:24,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:56:24,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:56:24,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:56:30,930 INFO L124 PetriNetUnfolderBase]: 2838/5700 cut-off events. [2024-11-13 12:56:30,930 INFO L125 PetriNetUnfolderBase]: For 152720/152720 co-relation queries the response was YES. [2024-11-13 12:56:31,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57775 conditions, 5700 events. 2838/5700 cut-off events. For 152720/152720 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 45109 event pairs, 198 based on Foata normal form. 4/5704 useless extension candidates. Maximal degree in co-relation 57425. Up to 4552 conditions per place. [2024-11-13 12:56:31,025 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 933 selfloop transitions, 298 changer transitions 7/1239 dead transitions. [2024-11-13 12:56:31,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 1239 transitions, 32078 flow [2024-11-13 12:56:31,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-13 12:56:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-13 12:56:31,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 295 transitions. [2024-11-13 12:56:31,027 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3782051282051282 [2024-11-13 12:56:31,027 INFO L175 Difference]: Start difference. First operand has 536 places, 1022 transitions, 25388 flow. Second operand 39 states and 295 transitions. [2024-11-13 12:56:31,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 1239 transitions, 32078 flow [2024-11-13 12:56:33,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 1239 transitions, 30287 flow, removed 556 selfloop flow, removed 11 redundant places. [2024-11-13 12:56:33,331 INFO L231 Difference]: Finished difference. Result has 579 places, 1137 transitions, 28120 flow [2024-11-13 12:56:33,332 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=23977, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=28120, PETRI_PLACES=579, PETRI_TRANSITIONS=1137} [2024-11-13 12:56:33,333 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 558 predicate places. [2024-11-13 12:56:33,333 INFO L471 AbstractCegarLoop]: Abstraction has has 579 places, 1137 transitions, 28120 flow [2024-11-13 12:56:33,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:33,333 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:56:33,333 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:56:33,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-13 12:56:33,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-13 12:56:33,534 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:56:33,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:56:33,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1946610215, now seen corresponding path program 13 times [2024-11-13 12:56:33,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:56:33,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599037922] [2024-11-13 12:56:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:56:33,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:56:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:56:33,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:56:33,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599037922] [2024-11-13 12:56:33,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599037922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:56:33,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699166645] [2024-11-13 12:56:33,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:56:33,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:33,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:56:33,800 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:56:33,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-13 12:56:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:34,027 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 12:56:34,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:56:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:56:34,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:56:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:56:34,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699166645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:56:34,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:56:34,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-13 12:56:34,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472309192] [2024-11-13 12:56:34,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:56:34,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 12:56:34,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:56:34,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 12:56:34,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:56:34,699 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:56:34,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 1137 transitions, 28120 flow. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:34,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:56:34,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:56:34,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:56:39,498 INFO L124 PetriNetUnfolderBase]: 2858/5746 cut-off events. [2024-11-13 12:56:39,498 INFO L125 PetriNetUnfolderBase]: For 148793/148793 co-relation queries the response was YES. [2024-11-13 12:56:39,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57748 conditions, 5746 events. 2858/5746 cut-off events. For 148793/148793 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 45991 event pairs, 135 based on Foata normal form. 24/5770 useless extension candidates. Maximal degree in co-relation 57378. Up to 1682 conditions per place. [2024-11-13 12:56:39,786 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 576 selfloop transitions, 707 changer transitions 2/1286 dead transitions. [2024-11-13 12:56:39,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 1286 transitions, 33285 flow [2024-11-13 12:56:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 12:56:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-13 12:56:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 201 transitions. [2024-11-13 12:56:39,787 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.402 [2024-11-13 12:56:39,787 INFO L175 Difference]: Start difference. First operand has 579 places, 1137 transitions, 28120 flow. Second operand 25 states and 201 transitions. [2024-11-13 12:56:39,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 1286 transitions, 33285 flow [2024-11-13 12:56:42,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 1286 transitions, 32710 flow, removed 227 selfloop flow, removed 9 redundant places. [2024-11-13 12:56:42,502 INFO L231 Difference]: Finished difference. Result has 594 places, 1169 transitions, 29868 flow [2024-11-13 12:56:42,503 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=27643, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=676, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=29868, PETRI_PLACES=594, PETRI_TRANSITIONS=1169} [2024-11-13 12:56:42,503 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 573 predicate places. [2024-11-13 12:56:42,504 INFO L471 AbstractCegarLoop]: Abstraction has has 594 places, 1169 transitions, 29868 flow [2024-11-13 12:56:42,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:42,504 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:56:42,504 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:56:42,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-13 12:56:42,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-13 12:56:42,704 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:56:42,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:56:42,705 INFO L85 PathProgramCache]: Analyzing trace with hash 375410097, now seen corresponding path program 15 times [2024-11-13 12:56:42,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:56:42,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479550217] [2024-11-13 12:56:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:56:42,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:56:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:56:43,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:56:43,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479550217] [2024-11-13 12:56:43,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479550217] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:56:43,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981730650] [2024-11-13 12:56:43,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:56:43,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:43,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:56:43,423 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:56:43,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-13 12:56:43,520 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 12:56:43,520 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:56:43,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 12:56:43,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:56:43,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:56:43,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2024-11-13 12:56:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:56:44,009 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:56:44,451 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-13 12:56:44,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-13 12:56:44,542 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-13 12:56:44,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-11-13 12:56:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:56:44,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981730650] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:56:44,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:56:44,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 26 [2024-11-13 12:56:44,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062871139] [2024-11-13 12:56:44,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:56:44,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 12:56:44,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:56:44,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 12:56:44,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-11-13 12:56:44,598 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:56:44,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 1169 transitions, 29868 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:44,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:56:44,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:56:44,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:56:49,423 INFO L124 PetriNetUnfolderBase]: 2898/5811 cut-off events. [2024-11-13 12:56:49,423 INFO L125 PetriNetUnfolderBase]: For 154356/154356 co-relation queries the response was YES. [2024-11-13 12:56:49,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60027 conditions, 5811 events. 2898/5811 cut-off events. For 154356/154356 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 46028 event pairs, 234 based on Foata normal form. 1/5812 useless extension candidates. Maximal degree in co-relation 59648. Up to 5348 conditions per place. [2024-11-13 12:56:49,678 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 1081 selfloop transitions, 144 changer transitions 4/1230 dead transitions. [2024-11-13 12:56:49,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 1230 transitions, 33010 flow [2024-11-13 12:56:49,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 12:56:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-13 12:56:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 211 transitions. [2024-11-13 12:56:49,680 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3907407407407407 [2024-11-13 12:56:49,680 INFO L175 Difference]: Start difference. First operand has 594 places, 1169 transitions, 29868 flow. Second operand 27 states and 211 transitions. [2024-11-13 12:56:49,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 1230 transitions, 33010 flow [2024-11-13 12:56:52,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 1230 transitions, 31469 flow, removed 188 selfloop flow, removed 15 redundant places. [2024-11-13 12:56:52,444 INFO L231 Difference]: Finished difference. Result has 611 places, 1188 transitions, 29203 flow [2024-11-13 12:56:52,444 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=28359, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1026, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=29203, PETRI_PLACES=611, PETRI_TRANSITIONS=1188} [2024-11-13 12:56:52,445 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 590 predicate places. [2024-11-13 12:56:52,445 INFO L471 AbstractCegarLoop]: Abstraction has has 611 places, 1188 transitions, 29203 flow [2024-11-13 12:56:52,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:52,445 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:56:52,445 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:56:52,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-13 12:56:52,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-13 12:56:52,646 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:56:52,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:56:52,646 INFO L85 PathProgramCache]: Analyzing trace with hash -780270575, now seen corresponding path program 14 times [2024-11-13 12:56:52,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:56:52,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251246781] [2024-11-13 12:56:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:56:52,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:56:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:56:52,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:56:52,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251246781] [2024-11-13 12:56:52,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251246781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:56:52,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224674950] [2024-11-13 12:56:52,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:56:52,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:52,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:56:52,894 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:56:52,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-13 12:56:53,034 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:56:53,035 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:56:53,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 12:56:53,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:56:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:56:53,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:56:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:56:53,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224674950] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:56:53,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:56:53,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-11-13 12:56:53,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826371128] [2024-11-13 12:56:53,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:56:53,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 12:56:53,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:56:53,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 12:56:53,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:56:53,284 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:56:53,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 1188 transitions, 29203 flow. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:53,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:56:53,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:56:53,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:57:01,058 INFO L124 PetriNetUnfolderBase]: 3904/7667 cut-off events. [2024-11-13 12:57:01,059 INFO L125 PetriNetUnfolderBase]: For 196742/196742 co-relation queries the response was YES. [2024-11-13 12:57:01,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74998 conditions, 7667 events. 3904/7667 cut-off events. For 196742/196742 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 62543 event pairs, 95 based on Foata normal form. 16/7683 useless extension candidates. Maximal degree in co-relation 74457. Up to 2336 conditions per place. [2024-11-13 12:57:01,242 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 645 selfloop transitions, 946 changer transitions 0/1592 dead transitions. [2024-11-13 12:57:01,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 1592 transitions, 41381 flow [2024-11-13 12:57:01,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 12:57:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-13 12:57:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 237 transitions. [2024-11-13 12:57:01,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.474 [2024-11-13 12:57:01,244 INFO L175 Difference]: Start difference. First operand has 611 places, 1188 transitions, 29203 flow. Second operand 25 states and 237 transitions. [2024-11-13 12:57:01,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 1592 transitions, 41381 flow [2024-11-13 12:57:04,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 1592 transitions, 40988 flow, removed 78 selfloop flow, removed 16 redundant places. [2024-11-13 12:57:04,290 INFO L231 Difference]: Finished difference. Result has 626 places, 1427 transitions, 38081 flow [2024-11-13 12:57:04,292 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=28791, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=753, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=38081, PETRI_PLACES=626, PETRI_TRANSITIONS=1427} [2024-11-13 12:57:04,292 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 605 predicate places. [2024-11-13 12:57:04,292 INFO L471 AbstractCegarLoop]: Abstraction has has 626 places, 1427 transitions, 38081 flow [2024-11-13 12:57:04,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:04,293 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:57:04,293 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:04,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-13 12:57:04,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-13 12:57:04,494 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:57:04,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:04,494 INFO L85 PathProgramCache]: Analyzing trace with hash -829421769, now seen corresponding path program 15 times [2024-11-13 12:57:04,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:04,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21036791] [2024-11-13 12:57:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:04,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:57:04,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:04,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21036791] [2024-11-13 12:57:04,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21036791] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:04,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234140461] [2024-11-13 12:57:04,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:57:04,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:04,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:04,741 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:04,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-13 12:57:04,880 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 12:57:04,881 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:04,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 12:57:04,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:57:04,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:57:05,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234140461] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:05,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:05,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-13 12:57:05,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630911168] [2024-11-13 12:57:05,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:05,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 12:57:05,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:05,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 12:57:05,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:57:05,232 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:57:05,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 1427 transitions, 38081 flow. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:05,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:57:05,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:57:05,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:57:14,802 INFO L124 PetriNetUnfolderBase]: 3930/7747 cut-off events. [2024-11-13 12:57:14,802 INFO L125 PetriNetUnfolderBase]: For 229503/229503 co-relation queries the response was YES. [2024-11-13 12:57:14,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80279 conditions, 7747 events. 3930/7747 cut-off events. For 229503/229503 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 63483 event pairs, 1237 based on Foata normal form. 36/7783 useless extension candidates. Maximal degree in co-relation 79734. Up to 6414 conditions per place. [2024-11-13 12:57:14,938 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1165 selfloop transitions, 341 changer transitions 0/1507 dead transitions. [2024-11-13 12:57:14,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 1507 transitions, 42055 flow [2024-11-13 12:57:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 12:57:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-13 12:57:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 194 transitions. [2024-11-13 12:57:14,939 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3730769230769231 [2024-11-13 12:57:14,939 INFO L175 Difference]: Start difference. First operand has 626 places, 1427 transitions, 38081 flow. Second operand 26 states and 194 transitions. [2024-11-13 12:57:14,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 1507 transitions, 42055 flow [2024-11-13 12:57:18,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 1507 transitions, 40999 flow, removed 338 selfloop flow, removed 8 redundant places. [2024-11-13 12:57:18,849 INFO L231 Difference]: Finished difference. Result has 647 places, 1439 transitions, 38041 flow [2024-11-13 12:57:18,850 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=37043, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1091, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=38041, PETRI_PLACES=647, PETRI_TRANSITIONS=1439} [2024-11-13 12:57:18,850 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 626 predicate places. [2024-11-13 12:57:18,850 INFO L471 AbstractCegarLoop]: Abstraction has has 647 places, 1439 transitions, 38041 flow [2024-11-13 12:57:18,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:18,850 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:57:18,851 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:18,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-13 12:57:19,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-13 12:57:19,051 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:57:19,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:19,051 INFO L85 PathProgramCache]: Analyzing trace with hash -997034153, now seen corresponding path program 16 times [2024-11-13 12:57:19,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:19,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571587977] [2024-11-13 12:57:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:19,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:20,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:20,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571587977] [2024-11-13 12:57:20,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571587977] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:20,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268351886] [2024-11-13 12:57:20,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:57:20,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:20,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:20,252 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:20,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-13 12:57:20,388 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:57:20,388 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:20,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 12:57:20,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:20,730 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:57:20,730 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-11-13 12:57:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:57:20,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:21,184 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-11-13 12:57:21,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-11-13 12:57:21,380 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-13 12:57:21,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-13 12:57:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:57:21,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268351886] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:21,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:21,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-11-13 12:57:21,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393206027] [2024-11-13 12:57:21,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:21,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 12:57:21,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:21,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 12:57:21,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2024-11-13 12:57:21,535 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:57:21,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 1439 transitions, 38041 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:21,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:57:21,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:57:21,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:57:29,352 INFO L124 PetriNetUnfolderBase]: 3948/7791 cut-off events. [2024-11-13 12:57:29,352 INFO L125 PetriNetUnfolderBase]: For 226544/226544 co-relation queries the response was YES. [2024-11-13 12:57:29,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79793 conditions, 7791 events. 3948/7791 cut-off events. For 226544/226544 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 63963 event pairs, 333 based on Foata normal form. 5/7796 useless extension candidates. Maximal degree in co-relation 79238. Up to 7303 conditions per place. [2024-11-13 12:57:29,884 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 1383 selfloop transitions, 121 changer transitions 13/1518 dead transitions. [2024-11-13 12:57:29,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 1518 transitions, 41767 flow [2024-11-13 12:57:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-13 12:57:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-13 12:57:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 276 transitions. [2024-11-13 12:57:29,886 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40588235294117647 [2024-11-13 12:57:29,886 INFO L175 Difference]: Start difference. First operand has 647 places, 1439 transitions, 38041 flow. Second operand 34 states and 276 transitions. [2024-11-13 12:57:29,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 1518 transitions, 41767 flow [2024-11-13 12:57:33,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 1518 transitions, 41213 flow, removed 63 selfloop flow, removed 13 redundant places. [2024-11-13 12:57:33,762 INFO L231 Difference]: Finished difference. Result has 677 places, 1449 transitions, 38043 flow [2024-11-13 12:57:33,763 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=37493, PETRI_DIFFERENCE_MINUEND_PLACES=634, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=38043, PETRI_PLACES=677, PETRI_TRANSITIONS=1449} [2024-11-13 12:57:33,763 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 656 predicate places. [2024-11-13 12:57:33,763 INFO L471 AbstractCegarLoop]: Abstraction has has 677 places, 1449 transitions, 38043 flow [2024-11-13 12:57:33,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:33,763 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:57:33,763 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:33,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-13 12:57:33,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-13 12:57:33,964 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:57:33,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:33,964 INFO L85 PathProgramCache]: Analyzing trace with hash 885660189, now seen corresponding path program 16 times [2024-11-13 12:57:33,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:33,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098852843] [2024-11-13 12:57:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:33,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:57:34,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:34,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098852843] [2024-11-13 12:57:34,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098852843] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:34,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141812757] [2024-11-13 12:57:34,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:57:34,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:34,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:34,147 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:34,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-13 12:57:34,291 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:57:34,291 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:34,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 12:57:34,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:57:34,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:57:34,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141812757] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:34,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:34,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-13 12:57:34,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170486701] [2024-11-13 12:57:34,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:34,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 12:57:34,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:34,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 12:57:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:57:34,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:57:34,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 1449 transitions, 38043 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:34,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:57:34,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:57:34,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:57:44,659 INFO L124 PetriNetUnfolderBase]: 4027/8008 cut-off events. [2024-11-13 12:57:44,660 INFO L125 PetriNetUnfolderBase]: For 245861/245861 co-relation queries the response was YES. [2024-11-13 12:57:44,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82486 conditions, 8008 events. 4027/8008 cut-off events. For 245861/245861 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 66681 event pairs, 1204 based on Foata normal form. 36/8044 useless extension candidates. Maximal degree in co-relation 82061. Up to 6339 conditions per place. [2024-11-13 12:57:45,147 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1176 selfloop transitions, 408 changer transitions 0/1585 dead transitions. [2024-11-13 12:57:45,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 1585 transitions, 43629 flow [2024-11-13 12:57:45,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 12:57:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-13 12:57:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 230 transitions. [2024-11-13 12:57:45,149 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2024-11-13 12:57:45,149 INFO L175 Difference]: Start difference. First operand has 677 places, 1449 transitions, 38043 flow. Second operand 29 states and 230 transitions. [2024-11-13 12:57:45,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 1585 transitions, 43629 flow [2024-11-13 12:57:48,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 677 places, 1585 transitions, 43092 flow, removed 135 selfloop flow, removed 26 redundant places. [2024-11-13 12:57:48,976 INFO L231 Difference]: Finished difference. Result has 685 places, 1491 transitions, 40076 flow [2024-11-13 12:57:48,977 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=37386, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1048, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=40076, PETRI_PLACES=685, PETRI_TRANSITIONS=1491} [2024-11-13 12:57:48,977 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 664 predicate places. [2024-11-13 12:57:48,977 INFO L471 AbstractCegarLoop]: Abstraction has has 685 places, 1491 transitions, 40076 flow [2024-11-13 12:57:48,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:48,977 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:57:48,977 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:48,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-13 12:57:49,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-13 12:57:49,178 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:57:49,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:49,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1234879273, now seen corresponding path program 17 times [2024-11-13 12:57:49,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:49,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662069187] [2024-11-13 12:57:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:49,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:50,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:50,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662069187] [2024-11-13 12:57:50,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662069187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:50,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983862852] [2024-11-13 12:57:50,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:57:50,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:50,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:50,147 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:50,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-13 12:57:50,284 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-13 12:57:50,284 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:50,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 12:57:50,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:50,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:57:50,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 75 [2024-11-13 12:57:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:57:50,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:51,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:57:51,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 152 [2024-11-13 12:57:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:57:51,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983862852] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:51,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:51,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-11-13 12:57:51,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696649977] [2024-11-13 12:57:51,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:51,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 12:57:51,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:51,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 12:57:51,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2024-11-13 12:57:51,817 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:57:51,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 1491 transitions, 40076 flow. Second operand has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:51,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:57:51,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:57:51,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:58:02,010 INFO L124 PetriNetUnfolderBase]: 4037/8068 cut-off events. [2024-11-13 12:58:02,011 INFO L125 PetriNetUnfolderBase]: For 243701/243701 co-relation queries the response was YES. [2024-11-13 12:58:02,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83790 conditions, 8068 events. 4037/8068 cut-off events. For 243701/243701 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 67570 event pairs, 297 based on Foata normal form. 5/8073 useless extension candidates. Maximal degree in co-relation 83407. Up to 6843 conditions per place. [2024-11-13 12:58:02,209 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 1360 selfloop transitions, 281 changer transitions 12/1654 dead transitions. [2024-11-13 12:58:02,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 1654 transitions, 45136 flow [2024-11-13 12:58:02,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-13 12:58:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-13 12:58:02,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 335 transitions. [2024-11-13 12:58:02,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42948717948717946 [2024-11-13 12:58:02,211 INFO L175 Difference]: Start difference. First operand has 685 places, 1491 transitions, 40076 flow. Second operand 39 states and 335 transitions. [2024-11-13 12:58:02,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 1654 transitions, 45136 flow [2024-11-13 12:58:06,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 1654 transitions, 44625 flow, removed 162 selfloop flow, removed 14 redundant places. [2024-11-13 12:58:06,835 INFO L231 Difference]: Finished difference. Result has 715 places, 1497 transitions, 40387 flow [2024-11-13 12:58:06,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=39645, PETRI_DIFFERENCE_MINUEND_PLACES=671, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=40387, PETRI_PLACES=715, PETRI_TRANSITIONS=1497} [2024-11-13 12:58:06,836 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 694 predicate places. [2024-11-13 12:58:06,836 INFO L471 AbstractCegarLoop]: Abstraction has has 715 places, 1497 transitions, 40387 flow [2024-11-13 12:58:06,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:06,836 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:58:06,836 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:06,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-13 12:58:07,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:07,037 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:58:07,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:07,037 INFO L85 PathProgramCache]: Analyzing trace with hash -25717524, now seen corresponding path program 18 times [2024-11-13 12:58:07,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:07,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095970684] [2024-11-13 12:58:07,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:07,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:58:07,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:07,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095970684] [2024-11-13 12:58:07,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095970684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:07,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017805564] [2024-11-13 12:58:07,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:58:07,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:07,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:07,177 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:07,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_249a3d25-5d3f-492c-ae74-e812ba65fee9/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-13 12:58:07,357 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-13 12:58:07,357 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:07,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 12:58:07,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 12:58:07,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 12:58:07,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017805564] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:07,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:07,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2024-11-13 12:58:07,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8828301] [2024-11-13 12:58:07,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:07,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 12:58:07,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:07,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 12:58:07,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:58:07,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 12:58:07,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 715 places, 1497 transitions, 40387 flow. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:07,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:58:07,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 12:58:07,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:58:15,417 INFO L124 PetriNetUnfolderBase]: 4277/8424 cut-off events. [2024-11-13 12:58:15,417 INFO L125 PetriNetUnfolderBase]: For 272477/272477 co-relation queries the response was YES. [2024-11-13 12:58:15,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88864 conditions, 8424 events. 4277/8424 cut-off events. For 272477/272477 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 70162 event pairs, 185 based on Foata normal form. 92/8516 useless extension candidates. Maximal degree in co-relation 88476. Up to 3697 conditions per place. [2024-11-13 12:58:15,710 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1173 selfloop transitions, 542 changer transitions 1/1717 dead transitions. [2024-11-13 12:58:15,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 725 places, 1717 transitions, 49111 flow [2024-11-13 12:58:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 12:58:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 12:58:15,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 139 transitions. [2024-11-13 12:58:15,711 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4088235294117647 [2024-11-13 12:58:15,711 INFO L175 Difference]: Start difference. First operand has 715 places, 1497 transitions, 40387 flow. Second operand 17 states and 139 transitions. [2024-11-13 12:58:15,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 725 places, 1717 transitions, 49111 flow